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In this article, the editor introduces in detail "how Android uses broadcast to send messages". The content is detailed, the steps are clear, and the details are handled properly. I hope this article "how Android uses broadcast to send messages" can help you solve your doubts. Let's follow the editor's ideas to learn new knowledge.

The specific effects are as follows

1.activity_main.xml

2.MainActivity

Import android.content.Intent;import android.os.Bundle;import android.view.View;import android.widget.Button;import android.widget.EditText;import androidx.appcompat.app.AppCompatActivity; public class MainActivity extends AppCompatActivity {private EditText edit; private Button send; @ Override protected void onCreate (Bundle savedInstanceState) {super.onCreate (savedInstanceState); setContentView (R.layout.activity_main); / / input box id edit = (EditText) findViewById (R.id.edit) / / Button id send = (Button) findViewById (R.id.send); / / Click the button to send broadcast send.setOnClickListener (new View.OnClickListener () {@ Override public void onClick (View v) {/ / get the entered text String content=edit.getText (). ToString (); Intent intent = new Intent () / / package name intent.setAction ("xx.xx.xx"); intent.putExtra ("msg", content); sendBroadcast (intent);}});}}

3. Create a broadcast MyReceiver

Import android.content.BroadcastReceiver;import android.content.Context;import android.content.Intent;import android.util.Log;import android.widget.Toast; public class MyReceiver extends BroadcastReceiver {@ Override public void onReceive (Context context, Intent intent) {/ / Jump to the new page / / Intent I = new Intent (context, MainActivity2.class); / / i.addFlags (Intent.FLAG_ACTIVITY_NEW_TASK); / / context.startActivity (I) / / get broadcast content String content=intent.getStringExtra ("msg"); Toast.makeText (context, "broadcast recipient:" + content, Toast.LENGTH_SHORT). Show ();}}

Remember to register the broadcast in the manifest file

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