android - 对于我在广播接收器中指定的任何条件，我都看不到 toast 消息

Question

我已经在 manifest.xml 文件中指定了所有操作。我试图在我的广播接收器 onReceive 中捕获它们，但我看不到它们。

@Override
    public void onReceive(Context context, Intent intent) {
        if (Intent.ACTION_BOOT_COMPLETED.equals(intent.getAction())){
            Toast.makeText(context,"Sample broadcast receiver boot completed",Toast.LENGTH_LONG).show();
        }
        if (Intent.ACTION_POWER_CONNECTED.equals(intent.getAction())){
            Toast.makeText(context,"power connected",Toast.LENGTH_LONG).show();
        }
        if (Intent.ACTION_POWER_DISCONNECTED.equals(intent.getAction())){
            Toast.makeText(context,"power disconnected",Toast.LENGTH_LONG).show();
        }
    }

<receiver android:name=".MyBroadcastReceiver"  android:enabled="true" android:exported="true">
            <intent-filter>
                <action android:name="android.intent.action.BOOT_COMPLETED"/>
                <action android:name="android.net.conn.CONNECTIVITY_CHANGE"/>
                <action android:name="android.intent.action.ACTION_POWER_CONNECTED"/>
                <action android:name="android.intent.action.ACTION_POWER_DISCONNECTED"/>
            </intent-filter>
        </receiver>

Answer 1

为了收到BOOT_COMPLETED在您的应用程序中，您应该将此权限添加到您的 AndroidManifest.xml :

<uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" />

如 Android SDK 文档中所述:

If you don't request this permission, you will not receive the broadcast at that time.

您可以在此处了解有关该权限的更多信息:android.permission.RECEIVE_BOOT_COMPLETED