Hello i tried many times when i click the button it doesn't show the toast and broadcast receiver

the code attached down there kindly correct my miss takes its run successfully but when click the button nothing happend at all , I tried to edit in activity_main.xml but nothing happend

MainActivity.java

package com.example.myapplication;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;

public class MainActivity extends Activity {

    /** Called when the activity is first created. */
    @Override

    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
    }


    // broadcast a custom intent.

    public void broadcastIntent(View view){
        Intent intent = new Intent();
        intent.setAction("com.myapplication.BOOT_COMPLETED"); sendBroadcast(intent);
    }
}

MyReceiver.java

package com.example.myapplication;

import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.widget.Toast;


public class MyReceiver extends BroadcastReceiver{
    @Override
    public void onReceive(Context context, Intent intent) {
        Toast.makeText(context, "Intent Detected.", Toast.LENGTH_LONG).show();
    }
}

AndroidManifest.xml

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

    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:supportsRtl="true">

        <activity android:name=".MainActivity"
            android:exported="true">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>

        <receiver android:name="MyReceiver"
            android:exported="false">
            <intent-filter>
                <action android:name="com.myapplication.BOOT_COMPLETED">
                </action>
            </intent-filter>

        </receiver>
    </application>

</manifest>

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
    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"
    tools:context=".MainActivity">

    <TextView
        android:id="@ id/textView1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Example of Broadcast"
        android:layout_alignParentTop="true"
        android:layout_centerHorizontal="true"
        android:textSize="30dp" />

    <TextView
        android:id="@ id/textView2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Tutorials point "
        android:textColor="#ff87ff09"
        android:textSize="30dp"
        android:layout_above="@ id/imageButton"
        android:layout_centerHorizontal="true"
        android:layout_marginBottom="40dp" />

    <ImageButton
        android:id="@ id/imageButton"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_centerInParent="true"
        android:minWidth="48dp"
        android:minHeight="48dp"
        tools:ignore="SpeakableTextPresentCheck" />

    <Button
        android:id="@ id/button2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_below="@ id/imageButton"
        android:layout_centerHorizontal="true"
        android:onClick="broadcastIntent"
        android:text="broadcast_intent" />

</RelativeLayout>

CodePudding user response：

You are using a Manifest-declared receiver. This receiver would get invoked outside from other app or with some system events.

The receiver then becomes a separate entry point into your app which means that the system can start the app and deliver the broadcast if the app is not currently running.

I guess you should use Context-registered receiver for your use case where you want to send a broadcast within the app.

More information here

CodePudding user response：

I have facing his issue right now how to convert it from Manifest to Context ?

CodePudding user response：

I hope this could help

import androidx.appcompat.app.AppCompatActivity;

import android.content.BroadcastReceiver;
import android.content.Intent;
import android.content.IntentFilter;
import android.net.ConnectivityManager;
import android.os.Bundle;
import android.view.View;

public class MainActivity extends AppCompatActivity {
    BroadcastReceiver br;
    IntentFilter filter;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        br = new MyReceiver();

        filter= new IntentFilter(ConnectivityManager.CONNECTIVITY_ACTION);
        filter.addAction(Intent.ACTION_AIRPLANE_MODE_CHANGED);



    }



    public void broadcastIntent(View view){
        Intent intent = new Intent();
        intent.setAction("com.myapplication.BOOT_COMPLETED");
        sendBroadcast(intent);
        this.registerReceiver(br, filter);
    }
}

also see this link https://developer.android.com/guide/components/broadcasts

CodePudding user response：

Hello guys what is the solution i don’t find anything helpful here can someone help me also with it ?