android - 如何向 list 中的接收者发送自定义广播操作？

Question

MyReceiver.java

public class MyReceiver extends BroadcastReceiver {
    @Override
    public void onReceive(final Context context, final Intent intent) {
        Log.i("MyReceiver", "MyAction received!");
    }
}

在AndroidManifest.xml中(在application标签下)

<receiver android:name=".MyReceiver">
    <intent-filter>
        <action android:name="MyAction" />
    </intent-filter>
</receiver>

MainActivity.Java

public class MainActivity extends AppCompatActivity {
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        sendBroadcast(new Intent("MyAction"));
    }
}

MyReceiver.onReceive 方法永远不会被触发。 我错过了什么吗？

Answer 1

I use Android 8.

然后你必须使用一个明确的Intent，一个标识接收者的，例如:

sendBroadcast(new Intent(this, MyReceiver.class).setAction("MyAction"));

参见 Broacast limitations在 Android 8 发布文档中。