Android Development Posts

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:

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

Step: 1 Create a new Project in Android Studio

apply plugin: 'com.onesignal.androidsdk.onesignal-gradle-plugin'
dependencies {
    implementation 'com.onesignal:OneSignal:3.12.6'
}

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]'
    }
}

• login your OneSignal Account than create an app
  
  

  

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

  

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

• 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

• 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

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"

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

• This library user for firebase integration dependencies

{ 
   implementation 'com.google.firebase:firebase-auth:19.4.0'
}

• 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"/>
}

• 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");

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); 
}

• 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());
}

• 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();
                    } 
            }
    });
}

• “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

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.

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

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">
      </category></action></intent-filter>
    </activity>

    <service android:name=".MyFirebaseInstanceIDService">
      <intent-filter>
        <action android:name="com.google.firebase.INSTANCE_ID_EVENT">
      </action></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">
      </action></action></intent-filter>
    </service>
  </application>
</uses-permission>
</uses-permission>
</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 3: 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.

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

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() {
              @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 getHeaders() throws AuthFailureError {
            Map 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  void addToRequestQueue(Request 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.