LocalBroadcastReceiverManager
BroadActivity(注册广播,接受广播)和xml
package com.example.test0508.broadcast;
import androidx.appcompat.app.AppCompatActivity;
import androidx.localbroadcastmanager.content.LocalBroadcastManager;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;
import com.example.test0508.R;
public class BroadActivity extends AppCompatActivity {
private Button mBtn1;
private TextView mTvTest;
private MyBroadcast myBroadcast;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_broad1);
mBtn1 = findViewById(R.id.btn_broad1_btn1);
mTvTest = findViewById(R.id.tv_broad1_test);
mBtn1.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Intent intent = new Intent(BroadActivity.this,BroadActivity2.class);
startActivity(intent);
}
});
/**
* 注册广播
*/
myBroadcast = new MyBroadcast();
IntentFilter intentFilter = new IntentFilter();
intentFilter.addAction("com.skypan.update");
LocalBroadcastManager.getInstance(this).registerReceiver(myBroadcast,intentFilter);
}
private class MyBroadcast extends BroadcastReceiver{
@Override
public void onReceive(Context context, Intent intent) {
//广播接受
switch (intent.getAction()){
case "ss":
break;
case "com.skypan.update":
mTvTest.setText("123");
break;
}
}
}
@Override
protected void onDestroy() {
super.onDestroy();
//在destroy需要把广播取消掉
LocalBroadcastManager.getInstance(this).unregisterReceiver(myBroadcast);
}
}
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 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=".broadcast.BroadActivity"
android:orientation="vertical"
>
<Button
android:id="@+id/btn_broad1_btn1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="click"
/>
<TextView
android:id="@+id/tv_broad1_test"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="abc"
android:gravity="center"
android:textSize="20sp"
android:layout_marginTop="30dp"
/>
</LinearLayout>
BroadActivity2(发送广播)和xml
package com.example.test0508.broadcast;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import androidx.appcompat.app.AppCompatActivity;
import androidx.localbroadcastmanager.content.LocalBroadcastManager;
import com.example.test0508.R;
public class BroadActivity2 extends AppCompatActivity {
private Button mBtn;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_broad2);
mBtn = findViewById(R.id.btn_broad2_click);
mBtn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Intent intent = new Intent("com.skypan.update");
LocalBroadcastManager.getInstance(BroadActivity2.this).sendBroadcast(intent);
}
});
}
}
<?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:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".broadcast.BroadActivity">
<Button
android:id="@+id/btn_broad2_click"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="click me"
android:textAllCaps="false"
/>
</LinearLayout>