Question

当应用处于背景状态时用户点击通知，该应用程序已打开并跳转到PickUpActivity

NotificationManager mNotifyMgr = (NotificationManager) context.getSystemService(NOTIFICATION_SERVICE);
int notificationId = (int) System.currentTimeMillis();
Intent picukUpIntent = new Intent(context, PickUpActivity.class);
picukUpIntent.putExtra(MainScreenActivity.ORDER_ID, orderId);
picukUpIntent.putExtra(NOTI_TYPE, 3);
pendingIntent = PendingIntent.getActivity(
                   context,
                   notificationId,
                   picukUpIntent,
                   PendingIntent.FLAG_ONE_SHOT
                );

NotificationCompat.Builder builder = new NotificationCompat.Builder(context)
                    .setSmallIcon(R.drawable.ic_mini_logo)
                    .setContentTitle("Title")
                    .setContentText(message)
                    .setVisibility(Notification.VISIBILITY_PUBLIC)
  .setSound(RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION))
                    .setAutoCancel(true);
builder.setContentIntent(pendingIntent);
mNotifyMgr.notify(notificationId, builder.build());

当用户在应用程序处于后台时单击通知时，它会按照我的预期跳转到PickUpActivity。问题是，当用户点击或退回按钮时，它会退出应用程序。我希望当用户单击后退或按钮时它会跳转到MainScreenActivity。当用户在foregroud中点击通知时，该工作正常。所以我不想覆盖PickUpActivity中的后退和按钮行为。有没有办法设置PickUpActivity的父级是MainScreenActivity 我在Manifest中设置了父级，但它不起作用

<activity
    android:name=".screen.rating.PickUpActivity"
    android:parentActivityName=".screen.main.MainScreenActivity"
    android:screenOrientation="portrait">
    <meta-data
        android:name="android.support.PARENT_ACTIVITY"
        android:value=".screen.main.MainScreenActivity" />
</activity>

Answer 1

在您的通知活动中将其添加到onBackPressed。

在通知活动开始后putextra（）之后。＆＃34; onCreat（）＆＃34;

@Override
public void onBackPressed() {
    Bundle extras = getIntent().getExtras();

    boolean launchedFromNotif = false;

    if (extras.containsKey("EXTRA_LAUNCHED_BY_NOTIFICATION")) {
        launchedFromNotif = extras.getBoolean("EXTRA_LAUNCHED_BY_NOTIFICATION");
    }

    if (launchedFromNotif) {
        // Launched from notification, handle as special case
        Intent intent = new Intent(this, MainScreenActivity.class);
        intent.addFlags(Intent.FLAG_ACTIVITY_REORDER_TO_FRONT);
        mActivity.startActivity(intent);
        finish();
    } else {
        super.onBackPressed();
    }
}

Answer 2

当您在后台或前台使用应用程序时，您需要识别应用程序状态，因此使用以下方法可以识别您的应用程序状态。

public static boolean isAppIsInBackground(Context context) {
        boolean isInBackground = true;
        ActivityManager am = (ActivityManager) context.getSystemService(Context.ACTIVITY_SERVICE);
        if (Build.VERSION.SDK_INT > Build.VERSION_CODES.KITKAT_WATCH) {
            List<ActivityManager.RunningAppProcessInfo> runningProcesses = am.getRunningAppProcesses();
            for (ActivityManager.RunningAppProcessInfo processInfo : runningProcesses) {
                if (processInfo.importance == ActivityManager.RunningAppProcessInfo.IMPORTANCE_FOREGROUND) {
                    for (String activeProcess : processInfo.pkgList) {
                        if (activeProcess.equals(context.getPackageName())) {
                            isInBackground = false;
                        }
                    }
                }
            }
        } else {
            List<ActivityManager.RunningTaskInfo> taskInfo = am.getRunningTasks(1);
            ComponentName componentInfo = taskInfo.get(0).topActivity;
            if (componentInfo.getPackageName().equals(context.getPackageName())) {
                isInBackground = false;
            }
        }
        return isInBackground;
    }

然后在下面添加一行代码进入你的背压事件

 @Override
    public void onBackPressed() {
        super.onBackPressed();
        if(NotificationUtils.isAppIsInBackground(context)){
            //open your main screen activity MainScreenActivity.class
        }else{
            // what you want
        }
    }

Answer 3

Try to start activity your main Activity on BackPressed of Notification Screen

Implement the below code in your PickUpActivity Screen.

@Override
public void onBackPressed()
{
    super.onBackPressed();


        Intent intent = new Intent(PickUpActivity.this, MainScreenActivity.class);
        startActivity(intent);
        finish();

}

单击通知以启动活动时控制backstack

3 个答案: