Android --学习笔记记录

2019-11-06 10:05:22

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来源：转载

供稿：网友

广播：

–本地广播：发出的广播消息，其他应用接受不到，只有本应用内可以接受，速度快，效率高：简单例子(本地广播接收器)：

public class MainActivity extends AppCompatActivity { PRivate IntentFilter mIntentFilter; private LocalBroadcastManager mBroadcastManager; private BroadcastReceiver mBroadcastReceiver = new BroadcastReceiver() { @Override public void onReceive(Context context, Intent intent) { // do something } }; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); mBroadcastManager = LocalBroadcastManager.getInstance(this); mIntentFilter = new IntentFilter(); mIntentFilter.addAction("com.stevefat.MY_BROADCAST"); mBroadcastManager.registerReceiver(mBroadcastReceiver, mIntentFilter); //注册本地广播接收器 } //发送本地广播 private void sendBroadCast(){ Intent intent = new Intent("com.stevefat.MY_BROADCAST"); mBroadcastManager.sendBroadcast(intent); //发送本地广播 } @Override protected void onDestroy() { super.onDestroy(); mBroadcastManager.unregisterReceiver(mBroadcastReceiver); }}

–全局广播所有程序都可以接受（只要知道了Action 的名字）;