Android Development Posts

post

While developing apps in Android Studio, developers can create an APK file and share it with other developers or to QA people for testing purposes.

APK can be created with two types:

  1. Debug APK
  2. Release APK
  • Debug APK is very fast in building and Release APK is a little bit slow.

How to create a Release APK File:

  • Flowing below all steps
  • Open android studio
  • Click Build on the toolbar
  • Click Generate Signed Bundle/APK.
  • Select APK
  • Click the Next button
  • After clicking the next button, you will see the following dialog.
  • Click the "Create new..." button, highlighted in the following image by a red circle if you are creating an APK for the first time. Otherwise, you can choose from existing.
  • It will open one another dialog box
  • Key store path in select save location .jks file
  • Fill in all the information
  • Set a valid name for the key alias
  • Set 100 as validity years
  • Fill Certificate Information
  • Click OK
  • After you click on it, select "release" from the dialog box
  • Select "V1 (Jar Signature)" & "V2 (Full APK Signature)" checkboxes
  • Click Finish
  • It will start the process of building your APK

How to create a debug .apk file

  • Click Build and select Build Bundles(s)/APK(s)
  • Select "Build APK(s)" from the dialog box
  • It will start the process of building your debug APK file creating
November 25, 20201 minuteauthorPankaj Valani
post

Hello, friend, the shortcut way everyone likes. but remember a shortcut is to improve yourself and save time. It's a very good way. so in this blog learning the android studio shortcut key.use all short cut key and save time and performance improve

Search Keys:

  • Shift+Shift — Search Everywhere
  • Ctrl+F — Find Text within a Single File
  • Ctrl+Shift+F-Find Text in All Files
  • Ctrl+R — Replace Selected Text in a Single File
  • Ctrl+Shift+R — Replace Selected Text in all Files (Be Careful while Using This)
  • Ctrl+Shift+A —Search for IDE Commands

Navigation Keys:

  • Ctrl+N — Navigate to Class
  • Ctrl+Shift+N — Navigate to a File
  • Ctrl+B — Jump to Declarations
  • Alt+ ↑ — Jump to the Previous Method
  • Alt+↓ — Jump to Next Method
  • Ctrl+G — Jump to Line
  • Ctrl+E — Recent Files
  • Ctrl+Shift+Backspace — Jump to Last Edited Location
  • Ctrl+B — Find Declarations
  • Ctrl+Left Mouse(or)Ctrl+Alt+F7— Show Usage
  • Alt + F7 / Ctrl + F7 — Find usages /Find usages in file
  • Ctrl+Shift+B — Find Implementations
  • F3 — Find Next
  • Shift+F3 — Find Previous

BookMark Keys:

  • F11 — Toggle bookmark
  • Ctrl+F11 — Toggle bookmark with the mnemonic(0–9 or A-Z)
  • Ctrl +(0–9) — Go to numbered bookmark
  • Shift+F11 — Show all Bookmarks
  • Ctrl + Shift + F7 — Highlight usages in file

Selection Keys:

  • Ctrl + W — Extend selection (selects a word->line->method->Class )
  • Ctrl +Shift+ W — Decrease Selection
  • Alt + J — Select next occurrence
  • Ctrl + Alt + Shift + J — Select all occurrences
  • Alt + Shift + J — Unselect occurrence
  • Ctrl+Shift+V — Paste from recent buffers (from a History of Copied Contents)

Editing Keys:

  • Ctrl+F6 — Refactor Code
  • Ctrl+D — Duplicate a Line/Selected part
  • Ctrl+Y — Delete a Line/Selected part
  • Ctrl+Q — Quick Documentation
  • Ctrl + Space — Code completion
  • Ctrl+Shift+Space — Smart code completion (by expected type removes unrelated suggestions)
  • Alt+Insert — Generate Code
  • Ctrl+J — Insert Live template
  • Ctrl + O — Override methods
  • Ctrl + I — Implement methods
  • Ctrl + Alt + T — Surround with…
  • Ctrl + / — Comment / uncomment with line comment
  • Ctrl + Shift + / — Comment / uncomment with block comment
  • Ctrl+Alt+L — Reformat code

Run:

  • Ctrl + F9 — Compile and Run Make a project
  • Ctrl + Shift + F9 — Compile selected file, package or module
  • Shift + F10 — Run
  • Shift + F9 — Debug
  • Ctrl + Shift + F10 — Run context configuration from editor

Debugging:

  • F8 / F7 — Step over / into
  • Shift + F7 / Shift + F8 — Smart step into/Step out
  • Alt + F9 — Run to cursor
  • Alt + F8 — Evaluate expression
  • F9 — Resume program
  • Ctrl + F8 — Toggle breakpoint
  • Ctrl + Shift + F8 — View breakpoints
November 05, 20202 minutesauthorPankaj Valani
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 the 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></pre><div>
}

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();
    }
}
November 02, 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">
Select2

background2.xml

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

Select2

background3.xml

<?xml version="1.0" encoding="utf-8"?> 
<shape xmlns:android="http://schemas.android.com/apk/res/android">
Select2
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 :-


Select2
October 25, 20201 minuteauthorVivek Beladiya
post

Hello, wonderful friends today in this blog on learning in android XML files creating different types of shape creating. A shape is an XML file that defines a geometric shape, including strokes, colors, and gradients

First Creating .xml file:

  1. Open android studio
  2. Go to drawable
  3. Right-click drawable menu

Follow below image steps:

2020-12-18-5fdc731fe3b6a

Now friend starts coding:

  • Creating a capsule shape flow below code:
<?xml version="1.0" encoding="utf-8"?> 
<shape xmlns:android="http://schemas.android.com/apk/res/android" android:shape="rectangle" >
<corners
android:bottomLeftRadius="30dp"
android:bottomRightRadius="30dp"
android:radius="60dp"
android:topLeftRadius="30dp"
android:topRightRadius="30dp"/>

Corners:

The below image is showing the shape corner radius

Solid:

Solid means shape inner color “#CFCFCF”

Padding:

There is always developer confusion between padding and margin. Both provide extra space/gap inside or outside the container. In simple words, margin means to push outside, whereas padding means to push inside.

Size:

It's very simple shape width - height

October 07, 20201 minuteauthorPankaj Valani
post

Step: 1 Create a new Project in Android Studio

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

    alt


  • Enter Your Android Application Name & Select platform Google Android(FCM)

    alt


  • Generate a Firebase Server Key Read the documentation.
  • Enter your Firebase Server Key & Firebase Sender ID.

alt


alt


alt

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",]
    }

    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>

alt

October 01, 20201 minuteauthorVivek Beladiya
post
  • Developer use API calling retrofit, volley JSON or other tools but API response check-in postman time confusion how to creating this response model class
  • So a friend in this topic I will try your confusion remove flow below all steps and 5 min inner creating a wonderful model class

Step: 1 Android studio in install "RoboPOJOGenerator"

  • Location in the android studio:
  1. Open android studio
  2. Go to File
  3. Go to Setting
  4. Click plugin
  • check the below image && click and install RoboPOJOGenerator then your android studio restart

Step: 2 How to open RoboPOJOGenerator

  1. Open android studio
  2. Go to File
  3. Select directory below the image in showing related select any one directory
  4. Right-click - select New - then below showing "RoboPOJOGenerator"

Step: 3 How to add postman response

  1. Postman response copy
  2. Paste this response in "RoboPOJOGenerator" in one black color dialog showing in android studio
  3. Left top side one cursor visible on this area in paste this response
  4. Select "GSON" option in "RoboPOJOGenerator"
  5. Last click generate button after a few moments your model class is ready
August 15, 20201 minuteauthorPankaj Valani
post

1.Add this library build.gradle(:app)

  • This library user for firebase integration dependencies
  • { 
       implementation 'com.google.firebase:firebase-auth:19.4.0'
    }

2.Add this permission in AndroidManifest.xml

  • This permission use internet connection checking
{
<com.facebook.login.widget.LoginButton          
android:id="@+id/login_button"          
android:layout_width="match_parent"          
android:layout_height="match_parent"          
android:layout_gravity="center"
android:visibility="gone"/>
}

3.Activity in add this permission

  • This permission is for user data. Without this permission user data not meet

  • loginButtonThis button is Facebook button

  • LoginManager.getInstance().logInWithReadPermissions(FacebookLoginActivity.this, Arrays.asList("email", "public_profile"));
  • loginButton.setReadPermissions("email", "public_profile");

4.Initialize Authentication:

void initializeAuthentication(){
   FirebaseAuth  mAuth = FirebaseAuth.getInstance();
   GoogleSignInOptions gso = new GoogleSignInOptions.Builder(GoogleSignInOptions.DEFAULT_SIGN_IN)
   .requestIdToken(getString(R.string.default_web_client_id))
   .requestEmail()
   .build();
   mGoogleSignInClient = GoogleSignIn.getClient(this, so); 
}

7.Add This Function:

  • This function user login result return
void faceBookLogin(LoginResult loginResult){
   setFacebookData(loginResult);
   Profile profile = Profile.getCurrentProfile();      
   if (profile != null) {        
      String avatar = ImageRequest.getProfilePictureUri(profile.getId(), 200, 200)
     .toString();    
   }    handleFacebookAccessToken(loginResult.getAccessToken());
}

7.Handle Token :

  • This token return firebase login fails or not an event
private void handleFacebookAccessToken(AccessToken token) {
AuthCredential credential = FacebookAuthProvider.getCredential(token.getToken());
mAuth.signInWithCredential(credential)           
.addOnCompleteListener(this, new OnCompleteListener() {                
      @Override                
      public void onComplete(@NonNull Task task) {
      if (task.isSuccessful()) {
      FirebaseUser user = mAuth.getCurrentUser();
      user.getIdToken(true).addOnCompleteListener(new OnCompleteListener() {
      @Override
      public void onComplete(@NonNull Task task) {
            String token = task.getResult().getToken();
       }
    });
 } else {
      String errorCode = String.valueOf(task.getException());
      Toast.makeText(FacebookLoginActivity.this, "Login failed.", Toast.LENGTH_SHORT).show();
                    } 
            }
    });
}

Notes:

  • “Default_web_client_id” this keyword, not changes because creating google-services.json file time automatically this keyword in add values so this key work put at its
How to creating google JSON file : JSON File

Add google JSON file this location in android studio:

July 28, 20201 minuteauthorPankaj Valani