本地广播 localBroadcastManager Android

使用localBroadcastManager发出的广播只能在本应用程序的内部进行传递。类似于iOS的NSNotificationCenter

App应用内广播可理解为一种局部广播，广播的发送者和接收者都同属于一个App。

相比于全局广播（普通广播），App应用内广播优势体现在：安全性高 & 效率高

步骤：

1.注册广播（onResume方法内）

2.发送广播

3.收到广播

4.销毁广播（onPause方法内）

 

 

package com.fengbang.localbroadcasttest; import android.content.BroadcastReceiver; import android.content.Context; 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.util.Log; import android.view.View; import android.widget.Button; import android.widget.TextView; public class MainActivity extends AppCompatActivity { private IntentFilter intentFilter; private LocalReceiver localReceiver; private LocalBroadcastManager localBroadcastManager; private static final String TAG = "MainActivity"; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); localBroadcastManager = LocalBroadcastManager.getInstance(this); Button button = (Button) findViewById(R.id.button); button.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View view) { Intent intent = new Intent("com.fengbang.localbroadcasttest.LOCAL_BROADCAST"); localBroadcastManager.sendBroadcast(intent);//发送广播 } }); } @Override protected void onResume() { super.onResume(); intentFilter = new IntentFilter(); intentFilter.addAction("com.fengbang.localbroadcasttest.LOCAL_BROADCAST"); localReceiver = new LocalReceiver(); localBroadcastManager.registerReceiver(localReceiver,intentFilter);//注册广播 } @Override protected void onPause() { super.onPause(); localBroadcastManager.unregisterReceiver(localReceiver);//销毁广播 } class LocalReceiver extends BroadcastReceiver { @Override public void onReceive(Context context, Intent intent) { Log.d(TAG, "onReceive: 收到广播"); } } }

转载于:https://www.cnblogs.com/huangzs/p/9077991.html