Question

我创建了一个BroadcastReceiver来检测SDCard挂载和卸载然而，事件，我根本无法接收任何事件：这是AndroidManifest.xml：

<receiver android:enabled="true" android:label="SDCardMountReceiver" android:exported="true" android:name="xxx.broadcasts.SDCardBroadcastReceiver">
    <intent-filter>
        <action android:name="android.content.Intent.ACTION_MEDIA_MOUNTED"></action>
        <!-- or <action android:name="android.content.Intent.ACTION_MEDIA_UNMOUNTED" />--></intent-filter>
</receiver>

和SDCardMountReceiver类：

public class SDCardBroadcastReceiver extends BroadcastReceiver {
    public SDCardBroadcastReceiver() {
        super();
        System.err.println("constructor");
    }

    public void onReceive(Context context, Intent intent) {
        Log.d("SDCardBroadCastReceiver", "receive " + intent.getAction());
        System.err.println("jonathan receive " + intent.getAction());

    }
}

Answer 1

您还需要将数据方案设置为“file”。

   <intent-filter>
     <action android:name="android.intent.action.MEDIA_MOUNTED" />
     <data android:scheme="file" /> 
   </intent-filter>

参考：android-developers thread

Answer 2

Intent javadoc指定了不同的操作：名称值。使用“android.intent.action.MEDIA_MOUNTED”而不是“android.content.Intent.ACTION_MEDIA_MOUNTED”

Answer 3

如果以编程方式注册广播接收器，则还必须将方案设置为“file”。

IntentFilter filter = new IntentFilter();
filter.addAction(Intent.ACTION_MEDIA_MOUNTED);
filter.addAction(Intent.ACTION_MEDIA_REMOVED);
filter.addDataScheme("file");
mContext.registerReceiver(mExternalStorageReceiver, filter);

Android BroadcastReceiver无法接收任何广播事件

3 个答案: