author-img

Vivek Beladiya

Android Development

post

Basically, it works like a stack where each view is stacked on top of the other.

Create a drawable file for shadow view and assign the name image_shadow and add the below code in this file.

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android"
    android:shape="rectangle">
    <corners android:radius="10dp" />
    <gradient
    android:angle="270"
    android:centerX="300%"
    android:endColor="#99000000"
    android:startColor="#00000000"
    android:type="linear" />
    <size
    android:width="270dp"
    android:height="60dp" />
    <stroke
    android:width="1dp"
    android:color="#878787" />
</shape>

Now, open xml file and add the below code into it, and set this drawable file as view background.

<androidx.appcompat.widget.LinearLayoutCompat
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
xmlns:app="http://schemas.android.com/apk/res-auto"
tools:context=".MainActivity">
<androidx.constraintlayout.widget.ConstraintLayout
    android:layout_width="match_parent"
    android:layout_height="match_parent">
    <androidx.appcompat.widget.AppCompatImageView
        android:id="@+id/imageView"
        android:layout_width="250dp"
        android:layout_height="250dp"
        android:scaleType="centerCrop"
        android:src="@drawable/shopping_image"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintBottom_toBottomOf="parent"/>
    <View android:id="@+id/view"
        android:layout_width="250dp"
        android:layout_height="250dp"
        android:background="@drawable/image_shadow"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintBottom_toBottomOf="parent"/>
    <androidx.appcompat.widget.AppCompatTextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_margin="10dp"
        android:textColor="@android:color/white"
        android:text="Write your text here"
        android:textSize="25sp"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintBottom_toBottomOf="@+id/view"/>
</androidx.constraintlayout.widget.ConstraintLayout>
</androidx.appcompat.widget.LinearLayoutCompat>

That's it. You should be ready to go.

January 11, 20211 minuteauthorVivek Beladiya
post
Snackbars are fairly common in the Android app. Almost every app uses a snack bar to display some information about what's going on in the app. You can consider Snackbar as an alternative or the best version of Toasts in Android.

Step 1:- Using a normal Snackbar

To use Snackbar in your app, you just have to have the material design dependency in your app. Add Material design dependency to your build.Gradle app-level.

dependencies {
    implementation "com.google.android.material:$latest_version"
}
And then you can use the snack bar just like toast. For example:

Snackbar.make(view, "Show some message here", Snackbar.LENGTH_SHORT).show()
Step 2: Working with the MainActivity.xml


<?xml version="1.0" encoding="utf-8"?>
<android.support.design.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/coordinatorLayout"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context="com.example.application.snackbarapp.MainActivity">

    <RelativeLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent">

        <Button
            android:id="@+id/button"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_centerHorizontal="true"
            android:layout_centerVertical="true"
            android:text="show snackbar" />

    </RelativeLayout>

</android.support.design.widget.CoordinatorLayout>
Step 3: Creating a custom layout for a snack bar

Under Layout, the folder creates a layout for the snack bar that must be inflated when creating a snack bar under the mainactivity.java file.

import android.graphics.Color;
import android.support.design.widget.CoordinatorLayout;
import android.support.design.widget.Snackbar;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;

public class MainActivity extends AppCompatActivity {
    private CoordinatorLayout coordinatorLayout;
    private Button button;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        coordinatorLayout = findViewById(R.id.coordinatorLayout);
        button = findViewById(R.id.button);

        button.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                showSnackbar();
            }
        });
    }

    public void showSnackbar() {
        Snackbar snackbar = Snackbar.make(coordinatorLayout, "Marked as Read", Snackbar.LENGTH_INDEFINITE)
                .setAction("UNDO", new View.OnClickListener() {
                    @Override
                    public void onClick(View v) {
                        Snackbar snackbar1 = Snackbar.make(coordinatorLayout, "Undo successful", Snackbar.LENGTH_SHORT);
                        snackbar1.show();
                    }
                })
                .setActionTextColor(Color.RED);

        snackbar.show();
    }
}

January 02, 20211 minuteauthorVivek Beladiya
post
what is a SplashScreen?

A splash screen is a screen that appears when you open an app on your mobile device. So, we can say that it is the first impression for the user. It is commonly used to show an application logo or an image associated with an application.



















Implementation

So instead of using a layout file, we'll refer to the splash screen as the background of the activity theme. first, create an XML drawable splash_background.xml inside res/drawable folder in

<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android">

    <item android:drawable="@color/white" />
    
    <item
        android:drawable="@drawable/ic_icon_vector"
        android:gravity="center" />

</layer-list>
 next step, set splash_groundground.xml as the background for your splash activity in the theme. Add a new splash to your splash activity.


<!-- Splash Screen theme. -->
<style name="SplashTheme" parent="Theme.AppCompat.NoActionBar">
    <item name="android:windowBackground">@drawable/splash_background</item>
</style>
Add your theme to AndroidManifest.xml as your splash activity theme.

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.exmple.splash">

    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:roundIcon="@mipmap/ic_launcher_round"
        android:supportsRtl="true"
        android:theme="@style/Theme">
        
        <activity
            android:name=".SplashActivity"
            android:theme="@style/SplashTheme">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>

</manifest>
Create a blank activity for SplashActivity.java without XML. This class will only redirect to MainActivity.java.

public class SplashActivity extends AppCompatActivity {
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        startActivity(new Intent(SplashActivity.this, MainActivity.class));
        finish();
    }
}



December 25, 20201 minuteauthorVivek Beladiya
post
Cardview is a widget provided by Android to create a new look and functional UI. You can build your app with the following examples to make it look more professional. Cardview is a wonderful concept that makes your user experience better than the Android UI. Cardview is an Android Lollipop released with Android 5.0.















Customized CardView


First, add a CardView dependency to the application-level build.gradle file.

dependencies {
    implementation ‘androidx.cardview:cardview:1.0.0’
}
Then create a drawable background for the cards. For that, create a new drawable resource file inside the drawable folder.
res > drawable > New > Drawable Resource File.





background1.xml

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android">
    <gradient android:startColor="#FFAB00"
        android:endColor="#FFAB00">
    </gradient>
</shape>

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android">
    <gradient android:startColor="#0091EA"
        android:endColor="#00BFA5">
    </gradient>
</shape>

Screenshot 2020-12-19 at 10.52.33 PM.png 4.64 KB
background3.xml








<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android">
    <gradient android:startColor="#AEEA00"
        android:endColor="#FFD600">
    </gradient>
</shape>
Screenshot 2020-12-19 at 10.52.25 PM.png 4.75 KB
Now create a card view in the main XML file. Here I used  LinearLayout as the root widget, after using the card view. Below the codes that give you an idea of how to customize the card.
You can change it according to your needs.

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">

    <androidx.cardview.widget.CardView
        android:layout_width="match_parent"
        android:layout_height="173dp"
        android:layout_marginStart="20dp"
        android:layout_marginTop="20dp"
        android:layout_marginEnd="20dp"
        app:cardCornerRadius="8dp">

        <LinearLayout
            android:id="@+id/linearLayout1"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:background="@drawable/bg1"
            android:orientation="vertical">

            <LinearLayout
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_marginStart="30dp"
                android:layout_marginTop="20dp"
                android:layout_marginEnd="30dp"
                android:orientation="horizontal">

                <LinearLayout
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:orientation="vertical">

                    <TextView
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:text="Assam"
                        android:textColor="#000000"
                        android:textSize="22sp" />

                    <TextView
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:text="Current Location"
                        android:textColor="#000000"
                        android:textSize="14sp" />
                </LinearLayout>

            </LinearLayout>

            <LinearLayout
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                android:layout_marginStart="30dp"
                android:layout_marginTop="20dp"
                android:layout_marginEnd="30dp"
                android:orientation="horizontal">

                <TextView
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:text="25"
                    android:textColor="#000000"
                    android:textSize="28sp" />

                <LinearLayout
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:orientation="vertical">

                    <TextView
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:layout_marginStart="6dp"
                        android:text="o"
                        android:textColor="#000000"
                        android:textSize="13sp" />

                </LinearLayout>

                <TextView
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:text="18 %"
                    android:textColor="#000000"
                    android:textSize="14sp" />

                <RelativeLayout
                    android:layout_width="match_parent"
                    android:layout_height="match_parent">

                    <TextView
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:layout_alignParentEnd="true"
                        android:layout_marginStart="6dp"
                        android:text="11.25 AM"
                        android:textColor="#000000"
                        android:textSize="14sp" />
                </RelativeLayout>
            </LinearLayout>
        </LinearLayout>
    </androidx.cardview.widget.CardView>

    <androidx.cardview.widget.CardView
        android:layout_width="match_parent"
        android:layout_height="173dp"
        android:layout_marginStart="20dp"
        android:layout_marginTop="20dp"
        android:layout_marginEnd="20dp"
        app:cardCornerRadius="8dp">

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:background="@drawable/bg2"
            android:orientation="vertical">

            <LinearLayout
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_marginStart="30dp"
                android:layout_marginTop="20dp"
                android:layout_marginEnd="30dp"
                android:orientation="horizontal">

                <LinearLayout
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:orientation="vertical">

                    <TextView
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:text="Delhi"
                        android:textColor="@color/white"
                        android:textSize="22sp" />

                    <TextView
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:text="2 days ago"
                        android:textColor="@color/white"
                        android:textSize="14sp" />
                </LinearLayout>

            </LinearLayout>

            <LinearLayout
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                android:layout_marginStart="30dp"
                android:layout_marginTop="20dp"
                android:layout_marginEnd="30dp"
                android:orientation="horizontal">

                <TextView
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:text="39"
                    android:textColor="@color/white"
                    android:textSize="28sp" />

                <LinearLayout
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:orientation="vertical">

                    <TextView
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:layout_marginStart="6dp"
                        android:text="o"
                        android:textColor="@color/white"
                        android:textSize="13sp" />

                </LinearLayout>

                <TextView
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:text="35 %"
                    android:textColor="@color/white"
                    android:textSize="14sp" />

                <RelativeLayout
                    android:layout_width="match_parent"
                    android:layout_height="match_parent">

                    <TextView
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:layout_alignParentEnd="true"
                        android:layout_marginStart="6dp"
                        android:text="01.05 PM"
                        android:textColor="#D6D6D6"
                        android:textSize="14sp" />
                </RelativeLayout>
            </LinearLayout>
        </LinearLayout>
    </androidx.cardview.widget.CardView>

    <androidx.cardview.widget.CardView
        android:layout_width="match_parent"
        android:layout_height="173dp"
        android:layout_marginStart="20dp"
        android:layout_marginTop="20dp"
        android:layout_marginEnd="20dp"
        app:cardCornerRadius="8dp">

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:background="@drawable/bg3"
            android:orientation="vertical">

            <LinearLayout
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_marginStart="30dp"
                android:layout_marginTop="20dp"
                android:layout_marginEnd="30dp"
                android:orientation="horizontal">

                <LinearLayout
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:orientation="vertical">

                    <TextView
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:text="Darjeeling"
                        android:textColor="#000000"
                        android:textSize="22sp" />

                    <TextView
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:text="2 weeks ago"
                        android:textColor="#000000"
                        android:textSize="14sp" />
                </LinearLayout>

            </LinearLayout>

            <LinearLayout
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                android:layout_marginStart="30dp"
                android:layout_marginTop="20dp"
                android:layout_marginEnd="30dp"
                android:orientation="horizontal">

                <TextView
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:text="12"
                    android:textColor="#000000"
                    android:textSize="28sp" />

                <LinearLayout
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:orientation="vertical">

                    <TextView
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:layout_marginStart="6dp"
                        android:text="o"
                        android:textColor="#000000"
                        android:textSize="13sp" />

                </LinearLayout>

                <TextView
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:text="9 %"
                    android:textColor="#000000"
                    android:textSize="14sp" />

                <RelativeLayout
                    android:layout_width="match_parent"
                    android:layout_height="match_parent">

                    <TextView
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:layout_alignParentEnd="true"
                        android:layout_marginStart="6dp"
                        android:text="05.00 AM"
                        android:textColor="#000000"
                        android:textSize="14sp" />
                </RelativeLayout>
            </LinearLayout>
        </LinearLayout>
    </androidx.cardview.widget.CardView>
</LinearLayout>
Output :-

December 19, 20201 minuteauthorVivek Beladiya
post
First, create a new Android Studio project and add the dependencies and plugin. First set up OneSignal in your project.
Add OneSignal dependency and plugin to your build.Gradle app-level.

apply plugin: 'com.onesignal.androidsdk.onesignal-gradle-plugin'

dependencies {
    implementation 'com.onesignal:OneSignal:3.12.6'
}
end add OneSignal dependency to your build.Gradle project-level.
buildscript {
    repositories {
        google()
        jcenter()
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:4.1.0'
        classpath 'gradle.plugin.com.onesignal:onesignal-gradle-plugin:[0.12.4, 0.99.99]'
    }
}
Step: 2  Create a new OneSignal Project

  • login your OneSignal Account than create an app
    1.png 34.06 KB
  • Enter Your Android Application Name & Select platform  Google Android(FCM)
    2.png 76.02 KB
  • Generate a Firebase Server Key Read the documentation.
  •  Enter your Firebase Server Key & Firebase Sender ID.

Step: 3  Add Your Created Onesignal App ID

Add OneSignl default config  to your build.Gradle app-level.
android {
    compileSdkVersion 30
    buildToolsVersion "30.0.2"

    defaultConfig {
        applicationId "com.myapplication.app"
        minSdkVersion 17
        targetSdkVersion 30
        versionCode 1
        versionName "1.0.0"
        multiDexEnabled true
        testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
        manifestPlaceholders = [onesignal_app_id               : "Enter Your App ID",
                                onesignal_google_project_number: " Enter Firebase Sender ID"]
    }

    buildTypes {
        release {
            minifyEnabled true
            shrinkResources true
            proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
        }
    }

    compileOptions {
        sourceCompatibility JavaVersion.VERSION_1_8
        targetCompatibility JavaVersion.VERSION_1_8
    }
}
The next step is to create the class MyApplication & Declare the class MyApplication in AndroidManifest.xml.

import android.app.Application;
import android.content.Context;
import androidx.multidex.MultiDex;
import com.onesignal.OneSignal;

public class MyApplication extends Application {
    public static Context context;

    @Override
    public void onCreate() {
        super.onCreate();
        context = getApplicationContext();
        context = this;
				
        OneSignal.startInit(this)
                .inFocusDisplaying(OneSignal.OSInFocusDisplayOption.Notification)
                .unsubscribeWhenNotificationsAreDisabled(true)
                .init();
    }

    public static Context getContext() {
        return context;
    }
}
Declare the class MyApplication in AndroidManifest.xml.

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.myapplication.app">

    <uses-permission android:name="android.permission.INTERNET" />
    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />

    <application
        android:name="com.myapplication.app.MyApplication"
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:requestLegacyExternalStorage="true"
        android:supportsRtl="true"
        android:theme="@style/AppTheme">

        <activity
            android:name="com.myapplication.app.activity.SplashActivity"
            android:screenOrientation="portrait">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>

</manifest>


December 18, 20201 minuteauthorVivek Beladiya
post
Today I’m going to write on Create Floating Widget never stop closing the app from the background. First of all, you must know what is the service in Android.

What is a service in Android?

A service is a component that runs in the background without direct interaction with the user. Since the service has no user interface, it is not bound to the life cycle of the activity. If you want to repeat a task, using the service is the best way.
Service stops are one of the biggest problems when you clear the application from background functions.


My service is below:

public class FloatingViewService extends Service  {

    private WindowManager mWindowManager;
    private View mFloatingView;
    private View floatingButton;
    private final static float CLICK_DRAG_TOLERANCE = 10;

    private float downRawX, downRawY;
    private float dX, dY;
    int LAYOUT_FLAG;
    private SpeechRecognizer speechRecognizer;

    public FloatingViewService() {
    }
		Context context;

    public FloatingViewService(Context applicationContext) {
        super();
        context = applicationContext;
        Log.i("HERE", "here service created!");
    }
    @Override
    public IBinder onBind(Intent intent) {
        return null;
    }

    @Override
    public int onStartCommand(Intent intent, int flags, int startId) {
					 KeyguardManager myKM = (KeyguardManager) this.getSystemService(Context.KEYGUARD_SERVICE);
              if( myKM.inKeyguardRestrictedInputMode()) {
                  Intent i = new Intent(this,FloatingViewService.class);
                  startService(i);
//            //it is locked
                } else {
                    Intent i = new Intent(this, FloatingViewService.class);
                    startService(i);
        //it is not locked
             }
            return START_STICKY;
    }

    @Override
    public void onCreate() {
        super.onCreate();
        mFloatingView = LayoutInflater.from(this).inflate(R.layout.floating_layout, null);

        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
            LAYOUT_FLAG = WindowManager.LayoutParams.TYPE_APPLICATION_OVERLAY;
        } else {
            LAYOUT_FLAG = WindowManager.LayoutParams.TYPE_PHONE;
        }

        final WindowManager.LayoutParams params = new WindowManager.LayoutParams(
                WindowManager.LayoutParams.WRAP_CONTENT,
                WindowManager.LayoutParams.WRAP_CONTENT,
                LAYOUT_FLAG,
                WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE,
                PixelFormat.TRANSLUCENT);

        mWindowManager = (WindowManager) getSystemService(WINDOW_SERVICE);
        mWindowManager.addView(mFloatingView, params);

        floatingButton.setOnTouchListener(new View.OnTouchListener() {
            private int initialX;
            private int initialY;
            private float initialTouchX;
            private float initialTouchY;

            @Override
            public boolean onTouch(View v, MotionEvent event) {
                switch (event.getAction()) {
                    case MotionEvent.ACTION_DOWN:
                        initialX = params.x;
                        initialY = params.y;
                        initialTouchX = event.getRawX();
                        initialTouchY = event.getRawY();

                        downRawX = event.getRawX();
                        downRawY = event.getRawY();
                        dX = v.getX() - downRawX;
                        dY = v.getY() - downRawY;

                        return true;

                    case MotionEvent.ACTION_UP:

                        float upRawX = event.getRawX();
                        float upRawY = event.getRawY();

                        float upDX = upRawX - downRawX;
                        float upDY = upRawY - downRawY;
                        return true;

                    case MotionEvent.ACTION_MOVE:
                        params.x = initialX + (int) (event.getRawX() - initialTouchX);
                        params.y = initialY + (int) (event.getRawY() - initialTouchY);
                        mWindowManager.updateViewLayout(mFloatingView, params);
                        return true;
                }
                return false;
            }
        });
    }

    @Override
    public void onDestroy() {
        super.onDestroy();
    }
}
AndroidManifest.xml  file and update your service declarations under the application tag. Also, add  FOREGROUND_SERVICE, INTERNET and  WAKE_LOCK .Make sure you don't forget to include them as they won't work otherwise.

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android" 
          package="com.example.endless">

    <uses-permission android:name="android.permission.FOREGROUND_SERVICE"></uses-permission>
    <uses-permission android:name="android.permission.INTERNET"></uses-permission>
    <uses-permission android:name="android.permission.WAKE_LOCK" />

    <application
            android:allowBackup="true"
            android:icon="@mipmap/ic_launcher"
            android:label="@string/app_name"
            android:roundIcon="@mipmap/ic_launcher_round"
            android:supportsRtl="true"
            android:theme="@style/AppTheme">

        <service
                android:name=".FloatingViewService"
                android:enabled="true"
                android:exported="false">
        </service>

        <activity android:name=".MainActivity">
            <intent-filter>
                <action android:name="android.intent.action.MAIN"/>
                <category android:name="android.intent.category.LAUNCHER"/>
            </intent-filter>
        </activity>
    </application>
</manifest>

You can use the following code to check if the service is running. If the service is already in running mode, it does not need to be restarted otherwise start in your MainActivity.

FloatingViewService mFloatingService = new FloatingViewService(getApplicationContext());
  Intent mServiceIntent = new Intent(getApplicationContext(), mFloatingService.getClass());
if (!isMyServiceRunning(mFloatingService.getClass())) {
    startService(mServiceIntent);
}

Method isMyServiceRunning() is below add this in your MainActivity.

private boolean isMyServiceRunning(Class<?> serviceClass) {
    ActivityManager manager = (ActivityManager) getSystemService(Context.ACTIVITY_SERVICE);
    for (ActivityManager.RunningServiceInfo service : manager.getRunningServices(Integer.MAX_VALUE)) {
        if (serviceClass.getName().equals(service.service.getClassName())) {
            Log.i ("isMyServiceRunning?", true+"");
            return true;
        }
    }
    Log.i ("isMyServiceRunning?", false+"");
    return false;
}
Then Create a Floating Widget design. Create File floating_layout.xml Like This

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:orientation="horizontal">

    <RelativeLayout
        android:id="@+id/rl_close_button"
        android:layout_width="100dp"
        android:layout_height="wrap_content">

        <RelativeLayout
            android:id="@+id/relativeLayoutParent"
            android:layout_width="80dp"
            android:layout_height="70dp">

            <RelativeLayout
                android:layout_width="70dp"
                android:layout_height="70dp"
                android:background="@drawable/floating_round_main_shape">

                <RelativeLayout
                    android:layout_width="50dp"
                    android:layout_height="50dp"
                    android:layout_centerInParent="true"
                    android:background="@drawable/floating_inner_round_shape">

                    <ImageView
                        android:layout_width="25dp"
                        android:layout_height="25dp"
                        android:layout_centerInParent="true"
                        android:src="@drawable/ic_voice_icon" />

                </RelativeLayout>

            </RelativeLayout>

        </RelativeLayout>

    </RelativeLayout>

</RelativeLayout>

I hope it will help these services. 
Note:-This service will run better in Oreo and above versions.


December 18, 20203 minutesauthorVivek Beladiya
post

Firebase Cloud Messaging (FCM) is a cross-platform messaging solution that lets you deliver messages for free.

It allows you to send push notifications from the Firebase console or from the application server or some trusted server where logic runs.

Step 1:- Create a new Android Studio Project

First, create a new Android Studio project and add the dependencies. First set up Firebase in your project. You can find a good tutorial.

Add Firebase messaging dependency to your app-level.

build.Gradle
dependencies {
  implementation 'com.google.firebase:firebase-messaging:19.0.1'
}

Step 2: Create a Firebase Service

The next step is to create Firebase Services:- MyFirebaseInstanceIDService and MyFirebaseMessagingService. first MyFirebaseInstanceIDService service will handle the device registration process and the second MyFirebaseInstanceIDService will handle the reception and display of notifications. The services have no visual interface and are used for operations that run in the background. To create a service, right-click and select the Applications folder New -> Service -> Service.

setting

Type in your service name, and click the Finish button. Repeat the same steps for the second service.

setting

AndroidManifest.xml file and update your service declarations under the application tag. Also, add INTERNET and CLOUD TO DEVICE MESSAGING permissions so your app can interact with the FCM server.

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
  package="com.exmple.notify">

  <uses-permission android:name="android.permission.INTERNET" />
  <uses-permission android:name="com.google.android.c2dm.permission.RECEIVE" />

  <application
    android:allowBackup="true"
    android:icon="@mipmap/ic_launcher"
    android:label="@string/app_name"
    android:roundIcon="@mipmap/ic_launcher_round"
    android:supportsRtl="true"
    android:theme="@style/AppTheme">
    <activity android:name=".MainActivity">
      <intent-filter>
        <action android:name="android.intent.action.MAIN" />
        <category android:name="android.intent.category.LAUNCHER" />
      </intent-filter>
    </activity>

    <service android:name=".MyFirebaseInstanceIDService">
      <intent-filter>
        <action android:name="com.google.firebase.INSTANCE_ID_EVENT" />
      </intent-filter>
    </service>

    <service
      android:name=".MyFirebaseMessagingService"
      android:permission="com.google.android.c2dm.permission.SEND">
      <intent-filter>
        <action android:name="com.google.firebase.MESSAGING_EVENT" />
        <action android:name="com.google.android.c2dm.intent.RECEIVE" />
      </intent-filter>
    </service>
  </application>
</manifest>

To handle the device registration process, MyFirebaseInstanceIDService must increase the FireBaseInstenside service class. Under this service, override the tokenrefresh() method so that whenever the system decides to refresh the tokens, it will be requested. This usually happens when the user installs/reinstalls the application or when the user clears the application data.

Since you are sending notifications between devices, each user must subscribe to an issue with a different user_id. This ensures that users receive notifications sent to topics that match their user_id. Here is the implementation of MyFirebaseInstanceIDSericiclass.

public class MyFirebaseMessagingService extends FirebaseMessagingService {

  private final String ADMIN_CHANNEL_ID = "admin_channel";

  @Override
  public void onMessageReceived(RemoteMessage remoteMessage) {
    final Intent intent = new Intent(this, MainActivity.class);
    NotificationManager notificationManager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
    int notificationID = new Random().nextInt(3000);
   /*
    Apps targeting SDK 26 or above (Android O) must
    implement notification channels and add their notifications to at least one of them. Therefore, confirm if the version is Oreo or higher, then setup notification channel
   */
    if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.O) {
      setupChannels(notificationManager);
    }

    intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
    PendingIntent pendingIntent = PendingIntent.getActivity(this, 0, intent, PendingIntent.FLAG_ONE_SHOT);
    Bitmap largeIcon = BitmapFactory.decodeResource(getResources(), R.drawable.notify_icon);
    Uri notificationSoundUri = RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIF CATION);

    NotificationCompat.Builder notificationBuilder = new NotificationCompat.Builder(this, ADMIN_CHANNEL_ID)
        .setSmallIcon(R.drawable.notify_icon)
        .setLargeIcon(largeIcon)
        .setContentTitle(remoteMessage.getData().get("title"))
        .setContentText(remoteMessage.getData().get("message"))
        .setAutoCancel(true)
        .setSound(notificationSoundUri)
        .setContentIntent(pendingIntent);

    // Set notification color to match your app color template
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
      notificationBuilder.setColor(getResources().getColor(R.color.colorPrimaryDark));
    }
    notificationManager.notify(notificationID, notificationBuilder.build());
  }

  @RequiresApi(api = Build.VERSION_CODES.O)
  private void setupChannels(NotificationManager notificationManager) {
    CharSequence adminChannelName = "New notification";
    String adminChannelDescription = "Device to device notification ";

    NotificationChannel adminChannel;
    adminChannel = new NotificationChannel(ADMIN_CHANNEL_ID, adminChannelName, NotificationManager.IMPORTANCE_HIGH);
    adminChannel.setDescription(adminChannelDescription);
    adminChannel.enableLights(true);
    adminChannel.setLightColor(Color.RED);
    adminChannel.enableVibration(true);

    if (notificationManager != null) {
      notificationManager.createNotificationChannel(adminChannel);
    }
  }
}

Step 4: Implement the notification sending logic

This is the most important part of the whole article. This is where you define the content of the instruction and how it will be modeled. However, before you dive into coding, follow these steps to get your server key from the Firebase console.

console

Navigate to the Cloud Messaging tab, and copy your Server key

console

Implement the Sending Logic: An FCM server with the following request properties only needs an HTTP post request to send a push notification:

Method Type: POST

URL: https://fcm.googleapis.com/fcm/send

Headers:

Authorization: key="Firebase server key" Content-Type: application/json

Body:

{
 "to": "/topics/notification_userId",
 "data": {
  "title": "Notification title",
  "message": "Notification message",
  "key1" : "value1",
  "key2" : "value2" //additional data you want to pass
 }
}

With these concepts in mind, you will first create a JsonObject of Notification body within your activity class. This object budget will contain the subject of the receiver, the title of the notification, the notification message, and the other key/value pair you want to add.

public class MainActivity extends AppCompatActivity {
  EditText edtTitle;
  EditText edtMessage;
  final private String FCM_API = "https://fcm.googleapis.com/fcm/send";
  final private String serverKey = "key=" + "Your Firebase server key";
  final private String contentType = "application/json";
  final String TAG = "NOTIFICATION TAG";

  String NOTIFICATION_TITLE;
  String NOTIFICATION_MESSAGE;
  String TOPIC;

  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    edtTitle = findViewById(R.id.edtTitle);
    edtMessage = findViewById(R.id.edtMessage);
    Button btnSend = findViewById(R.id.btnSend);

    btnSend.setOnClickListener(new View.OnClickListener() {
      @Override
      public void onClick(View v) {
        TOPIC = "/topics/userABC"; //topic must match with what the receiver subscribed to
        NOTIFICATION_TITLE = edtTitle.getText().toString();
        NOTIFICATION_MESSAGE = edtMessage.getText().toString();

        JSONObject notification = new JSONObject();
        JSONObject notifcationBody = new JSONObject();
        try {
          notifcationBody.put("title", NOTIFICATION_TITLE);
          notifcationBody.put("message", NOTIFICATION_MESSAGE);
          notification.put("to", TOPIC);
          notification.put("data", notifcationBody);
        } catch (JSONException e) {
          Log.e(TAG, "onCreate: " + e.getMessage() );
        }
        sendNotification(notification);
      }
    });
  }
  private void sendNotification(JSONObject notification) {
 ...
  }
}

The next step is to request the network server using the library volley, then use the parameters to the root server will request notification on the target device.

public class MainActivity extends AppCompatActivity {

  ....

  private void sendNotification(JSONObject notification) {
    JsonObjectRequest jsonObjectRequest = new JsonObjectRequest(FCM_API, notification,
            new Response.Listener<JSONObject>() {
              @Override
              public void onResponse(JSONObject response)
              {
                Log.i(TAG, "onResponse: " + response.toString());
                edtTitle.setText("");
                edtMessage.setText("");
              }
            },
            new Response.ErrorListener() {
              @Override
              public void onErrorResponse(VolleyError error) {
                Toast.makeText(MainActivity.this, "Request error", Toast.LENGTH_LONG).show();
                Log.i(TAG, "onErrorResponse: Didn't work");
              }
            }){
          @Override
          public Map<String, String> getHeaders() throws AuthFailureError {
            Map<String, String> params = new HashMap<>();
            params.put("Authorization", serverKey);
            params.put("Content-Type", contentType);
            return params;
          }
        };
    MySingleton.getInstance(getApplicationContext()).addToRequestQueue(jsonObjectRequest);
  }
}

Finally, add a MySingleton class that will serve as a request queue for instruction requests.

public class MySingleton {
  private static MySingleton instance;
  private RequestQueue requestQueue;
  private Context ctx;

  private MySingleton(Context context) {
    ctx = context;
    requestQueue = getRequestQueue();
  }
  public static synchronized MySingleton getInstance(Context context) {
    if (instance == null) {
      instance = new MySingleton(context);
    }
    return instance;
  }
  public RequestQueue getRequestQueue() {
    if (requestQueue == null) {
      // getApplicationContext() is key, it keeps you from leaking the
      // Activity or BroadcastReceiver if someone passes one in.
      requestQueue = Volley.newRequestQueue(ctx.getApplicationContext());
    }
    return requestQueue;
  }
  public <T> void addToRequestQueue(Request<T> req) {
    getRequestQueue().add(req);
  }
}

With it, you're done creating your app. You can start sending push notifications between devices without typing any server-side code. Always make sure that the notification will not be delivered to you if the subject of the recipient is correct. If you do everything right, you will get the same result.

result

November 19, 20205 MinutesauthorVivek Beladiya