单击正在进行的通知时返回上一个活动

Question

在没有新意图的情况下，如何从通知返回到活动

还有这个

通知单击：活动已打开

    Intent resultIntent = new Intent(this, ProtocolMonitorActivity.class);

    TaskStackBuilder stackBuilder = TaskStackBuilder.create(this);
    stackBuilder.addParentStack(ProtocolMonitorActivity.class);
    stackBuilder.addNextIntent(resultIntent);

    PendingIntent resultPendingIntent = stackBuilder.getPendingIntent(0,
            PendingIntent.FLAG_UPDATE_CURRENT);

    NotificationCompat.Builder notiBuilder = new NotificationCompat.Builder(
            this).setSmallIcon(R.drawable.noti_icon)
            .setContentTitle("Protocol Monitor App")
            .setContentText("Service is running")
            .setOngoing(true);
    notiBuilder.setContentIntent(resultPendingIntent);

    notiManager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
    notiManager.notify(notiId, notiBuilder.build());

<application
    android:allowBackup="true"
    android:icon="@drawable/ic_launcher"
    android:label="@string/app_name"
    android:theme="@style/AppTheme" >

    <activity
        android:name=".ProtocolMonitorActivity"
        android:label="@string/app_name"
        android:process="com.android.phone"
        android:launchMode="singleTop"
        android:screenOrientation="portrait" >
        <intent-filter>
            <action android:name="android.intent.action.MAIN" />

            <category android:name="android.intent.category.LAUNCHER" />
            <category android:name="android.intent.category.DEVELOPMENT_PREFERENCE" />
        </intent-filter>

        <meta-data
            android:name="android.support.PARENT_ACTIVITY"
            android:value=".ProtocolMonitorActivity" />

    </activity>
</application>

Answer 1

不能使用taskstackbuilder执行此操作。TaskStackBuilder的行为是它总是清除任务（重新创建任何活动）。

你只需要一个“启动意图”就可以把你的任务放到前台，不管它碰巧处于什么状态。有两种方法可以做到这一点：

变式1：

final Intent notificationIntent = new Intent(this, ProtocolMonitorActivity.class);
notificationIntent.setAction(Intent.ACTION_MAIN);
notificationIntent.addCategory(Intent.CATEGORY_LAUNCHER);
notificationIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);

final Intent notificationIntent = 
        PackageManager.getLaunchIntentForPackage(getPackageName());

PendingIntent resultPendingIntent = PendingIntent.getActivity(this, 0,
        notificationIntent, PendingIntent.FLAG_UPDATE_CURRENT);

NotificationCompat.Builder notiBuilder = new NotificationCompat.Builder(
        this).setSmallIcon(R.drawable.noti_icon)
        .setContentTitle("Protocol Monitor App")
        .setContentText("Service is running")
        .setOngoing(true);
notiBuilder.setContentIntent(resultPendingIntent);

notiManager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
notiManager.notify(notiId, notiBuilder.build());