LocalBroadcastManager 使用

如果只是在应用程序进程内发送和接收广播，可以考虑使用LocalBroadcastManager而不是更通用的Context.sendBroadCaset()方法。

使用LocalBroadcastManager更高效，因为不需要跨进程管理草错，也不要考虑广播涉及的安全问题。

demo:

接收activity

public class MainActivity extends AppCompatActivity {

    public static final String FILETER = "MainActivity-BRODER";
    @butterknife.InjectView(R.id.button)
    Button button;
    private BroadcastReceiver broadcastReceiver;
    private LocalBroadcastManager localBroadcastManager;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        butterknife.ButterKnife.inject(this);
        button.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                startActivity(new Intent(MainActivity.this,SendActivity.class));
            }
        });
    }

    @Override
    protected void onResume() {
        super.onResume();
        localBroadcastManager = LocalBroadcastManager.getInstance(this);
26         IntentFilter intentFilter = new IntentFilter();
27         intentFilter.addAction(FILETER);
28         broadcastReceiver = new BroadcastReceiver() {
29 
30             @Override
31             public void onReceive(Context context, Intent intent) {
32                 String name = intent.getStringExtra("name");
33                 Log.e("MainActivity", "MainActivity ========  " + name);
34             }
35         };
36         localBroadcastManager.registerReceiver(broadcastReceiver, intentFilter);
    }

    @Override
    protected void onDestroy() {
        super.onDestroy();
        localBroadcastManager.unregisterReceiver(broadcastReceiver);
    }
}

发送 activity

public class SendActivity extends AppCompatActivity {

    @InjectView(R.id.button2)
    Button button2;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_send);
        ButterKnife.inject(this);
        
        button2.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                LocalBroadcastManager localBroadcastManager = LocalBroadcastManager.getInstance(SendActivity.this);
16                 Intent intent = new Intent();
17                 intent.setAction(MainActivity.FILETER);
18                 intent.putExtra("name", "我是sendActivity 发送");
19                 localBroadcastManager.sendBroadcast(intent);
            }
        });
    }
}