QT/QML Android App，点击通知栏时打开应用程序

我为 Android 应用程序制作了一个 QT。当我单击平板电脑中上面看到的按钮通知栏时。但是，如果单击通知，我的应用程序将打开/聚焦（不知道）并显示黑色窗口。简单来说怎么做呢。我的代码是：

package org.ays.operation;

import android.app.Notification;
import android.app.NotificationManager;
import android.content.Context;
import android.app.PendingIntent;
import android.content.Intent;


public class NotificationClient extends org.qtproject.qt5.android.bindings.QtActivity
{
     private static NotificationManager m_notificationManager;
     private static Notification.Builder m_builder;
     private static NotificationClient m_instance;
     private static PendingIntent contentIntent;
     private static Intent intent;


     public NotificationClient()
     {
         m_instance = this;
     }

     public static  void notify2()
     {
         intent = new Intent(m_instance, NotificationClient.class);
         contentIntent = PendingIntent.getActivity(m_instance, 0, intent,
                                         PendingIntent.FLAG_UPDATE_CURRENT);

         if (m_notificationManager == null) {
             m_notificationManager = (NotificationManager)m_instance.getSystemService(Context.NOTIFICATION_SERVICE);
             m_builder = new Notification.Builder(m_instance);
             m_builder.setSmallIcon(R.drawable.icon);
             m_builder.setContentTitle("A message from Qt!");
             m_builder.setDefaults(Notification.DEFAULT_SOUND);
             m_builder.setContentIntent(contentIntent);
             m_builder.setAutoCancel(true);
         }

         m_builder.setContentText("Bla Bla");
         m_notificationManager.notify(1, m_builder.build());
     }
 }

我来宾，重要的代码是打开/聚焦主应用程序的 PendingIntent。另一种情况是我不想将notify2用作静态。我可以从 Qt/JNI 动态使用它吗

第一种方式：

你必须改变这一行

intent = new Intent(m_instance, NotificationClient.class);

to

Intent intent = new Intent(mActivityInstance, mActivityInstance.getClass());

and

contentIntent = PendingIntent.getActivity(m_instance, 0, intent,
                                     PendingIntent.FLAG_UPDATE_CURRENT);

to

contentIntent = PendingIntent.getActivity(mActivityInstance, 0, intent,
                                     PendingIntent.FLAG_UPDATE_CURRENT);

注意mActivityInstance是你的mainActivity。

我从 C++ 和 JNI 设置 mActivityInstance，如下所示：

const QAndroidJniObject m_JavaNotification("com/falsinsoft/qtandroidtools/AndroidNotification",
                   "(Landroid/app/Activity)V",
                   QtAndroid::androidActivity().object<jobject>());

在我的 AndroidNotification.java 中：

public class AndroidNotification {
private final Activity mActivityInstance;

public AndroidNotification(Activity ActivityInstance)
{
    mActivityInstance = ActivityInstance;
}
}

第二种方式（我不确定这能解决你的问题！）： 更改manifest.xml 中的这一行：

    <application android:hardwareAccelerated="true" android:name="org.qtproject.qt5.android.bindings.QtApplication" android:label="YourProjectName" android:icon="@drawable/icon">

to:

    <application android:hardwareAccelerated="true" android:name="your java class extend from QtActivity" android:label="YourProjectName" android:icon="@drawable/icon">