android - 如何从 myDialog 发送广播( Intent )并在 myActivity 中接收？

Question

因此，我正在尝试了解 BroadcastReceivers 和 Intent 过滤器。我有一个在 MyActivity 中创建的自定义对话框。在对话框中，我有一个按钮。当按钮被点击时，我想发送一个 MyActivity 的接收器将接收到的广播。这是我现在拥有的:

//MyActivity.java
class myActivity extends Activity {

    //MyDialog dialog initialized in onCreate

    ...

    private class MyReceiver extends BroadcastReceiver {
        @Override
        public void onReceive(Context context, Intent intent) {
            //toast "Broadcast received"
        }
    }
}

//MyDialog.java
class MyDialog extends Dialog {

    //m_context = incoming context from MyActivity

    @Override
    protected void onCreate(Bundle savedInstanceState) {

        Button button1 = (Button)findViewById(R.id.button1);
        button1.setOnClickListener(new View.OnCLickListener() {

            @Override
            public void onClick(View v) {
                Intent intent = new Intent();
                intent.setAction("android.intent.action.RUN");
                m_context.sendBroadcast(intent);
            }

        });

    }

}


//AndroidManifest.xml
<activity android:name=".MyActivity" />
<receiver android:name="MyReceiver" android:enabled="true">
    <intent-filter >
        <action android:name="android.intent.action.RUN"/>
    </intent-filter>
</receiver>

当我按下按钮 1 时，应用程序崩溃了。谁能引导我朝着正确的方向前进？

Answer 1

在 MyActivity 中做这样的事情:

private BroadcastReceiver _refreshReceiver = new MyReceiver();

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    ...
    IntentFilter filter = new IntentFilter("SOMEACTION");
    this.registerReceiver(_refreshReceiver, filter); 
}

@Override
public void onDestroy() {
    super.onDestroy();
    this.unregisterReceiver(this._refreshReceiver);
}

并调用广播

Intent in = new Intent("SOMEACTION");
sendBroadcast(in);