写一个广播类
public class MyService extends BroadcastReceiver {
@Override
public void onReceive(Context context, Intent intent) {
Log.d(MainActivity.TAG, "onReceive: 接收一条本地广播");
}
}
用
LocalBroadcastManager类来注册和销毁广播
package com.yifei.myapplication;
import android.content.Intent;
import android.content.IntentFilter;
import android.support.v4.content.LocalBroadcastManager;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import java.util.function.IntFunction;
public class MainActivity extends AppCompatActivity {
public static String TAG ="MainActivity123";
private Button btn;
private LocalBroadcastManager broadcastManager;//广播管理器
//声明一个Myservice对象
private MyService myService;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
btn = findViewById(R.id.btn);
broadcastManager = LocalBroadcastManager.getInstance(this); //获取一个广播管理器实例
btn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent intent = new Intent("com.yifei.myapplication.MyService");
broadcastManager.sendBroadcast(intent);
}
});
IntentFilter intentFilter = new IntentFilter();
intentFilter.addAction("com.yifei.myapplication.MyService");
//获取广播对象
myService= new MyService();
//注册广播
broadcastManager.registerReceiver(myService,intentFilter);
}
@Override
protected void onDestroy() {
super.onDestroy();
broadcastManager.unregisterReceiver(myService);
}
}
receiver文件
public class MyService extends BroadcastReceiver {
@Override
public void onReceive(Context context, Intent intent) {
Log.d(MainActivity.TAG, "onReceive: 接收一条本地广播");
}
}