单击通知操作按钮后打开当前屏幕

问题描述

应用中有很多片段，例如 fragmentA、fragmentB 和 fragmentC。当应用程序显示 fragmentB 并且用户单击通知上的删除按钮时，fragmentB 上会出现一个正常工作的对话框，但是当应用程序显示 fragmentB 并且用户将应用程序置于后台并单击删除按钮时在通知中，对话框出现在主屏幕或前台的其他应用程序上。在这种情况下，对话框应该出现在 fragmentB（最后打开的屏幕/片段）上，并且应用程序应该出现在前台。请注意，这个片段B不是特定的，它可以是任何片段。

我在fragmentB中编写了以下显示通知的代码：

// Create an explicit intent for an activity in this app
val intent = Intent(requireContext(),DialogActivity::class.java)
intent.flags = Intent.FLAG_ACTIVITY_CLEAR_TOP or Intent.FLAG_ACTIVITY_SINGLE_TOP
val pendingIntent = PendingIntent.getActivity(requireContext(),intent,0)

val deleteIntent = Intent(this,BharosaBroadcastReceiver::class.java)
deleteIntent.flags = Intent.FLAG_ACTIVITY_CLEAR_TOP or Intent.FLAG_ACTIVITY_SINGLE_TOP

deleteIntent.apply {
    action = "Delete"
    putExtra("UserId","100")
    putExtra("notificationId",notificationId)
}
val deletePendingIntent = PendingIntent.getBroadcast(this,deleteIntent,0)

var btn : Button = findViewById(R.id.btn)

btn.setOnClickListener{
    val contentView = RemoteViews(packageName,R.layout.custom_push)
    contentView.setImageViewResource(R.id.image,R.mipmap.ic_launcher)
    contentView.setTextViewText(R.id.title,"Hello World")
    contentView.setTextViewText(R.id.text,"Please click the delete btton to delete")

    val notificationBuilder = NotificationCompat.Builder(this,channelId)
            .setSmallIcon(R.drawable.ic_action_info)
            .setColor(Color.GREEN)
            .setCustomContentView(contentView)
            .setCustomBigContentView(contentView)
            .setStyle(NotificationCompat.DecoratedCustomViewStyle())                            
            .setPriority(NotificationCompat.PRIORITY_HIGH)
            .setCategory(NotificationCompat.CATEGORY_MESSAGE)
            .setFullScreenIntent(pendingIntent,true)
            .setOngoing(true)
            contentView.setOnClickPendingIntent(R.id.delete,pendingIntent)
    with(NotificationManagerCompat.from(this)){
        notify(notificationId,notificationBuilder.build())
    }
}

BroadcastReceiver的代码如下：

class BharosaBroadcastReceiver(): BroadcastReceiver(){

    companion object {
        var isDeletedClicked = false
    }

override fun onReceive(context: Context?,intent: Intent?) {
    intent?.apply {
        try {
            val notificationId = getIntExtra("notificationId",0)

            var dialog = AlertDialog.Builder(context)
            dialog.setTitle("Hello!")
            dialog.setMessage("Do you want to delete it")
            dialog.setPositiveButton("Delete",DialogInterface.OnClickListener { dialog,whichButton ->
                    isDeletedClicked = true
                    context?.apply {
                        // Remove the notification programmatically on button click
                        NotificationManagerCompat.from(this).cancel(notificationId)
                    }
                })

            dialog.setNegativeButton("Don't delete",null)

            var dialogUI = dialog.create();

            dialogUI.setOnShowListener {

                val view = (it as AlertDialog).window
                view?.setBackgroundDrawableResource(R.drawable.alert_dialog_layout)

                // change positive button yes background
                val positiveButton: Button = (it as AlertDialog).getButton(DialogInterface.BUTTON_POSITIVE)

                positiveButton.background = context!!.resources.getDrawable(R.drawable.yes_alert_background)
                positiveButton.setTextColor(context.resources.getColor(R.color.white))

                val negativeButton = it.getButton(DialogInterface.BUTTON_NEGATIVE)
                negativeButton.setTextColor(context.resources.getColor(R.color.dialog_no_text))
            }

            if (Build.VERSION.SDK_INT>26)
                dialogUI.window!!.setType(WindowManager.LayoutParams.TYPE_APPLICATION_OVERLAY);
            else
                dialogUI.window!!.setType(WindowManager.LayoutParams.TYPE_SYSTEM_ALERT);
            dialogUI.show()

        } catch (ex: Exception) {
            //Log.d(TAG,"$ex")
        }
        }
    }
}

对话框活动如下所示，我需要从中删除应用标签 (Hello)：

AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    package="com.languageindia.bharosa">

    <uses-permission android:name="android.permission.SYSTEM_ALERT_WINDOW" />
    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
    <uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
    <uses-permission android:name="android.permission.INTERNET" />

    <application
        android:allowBackup="true"
        android:icon="@drawable/app_icon"
        android:label="Hello"
        android:roundIcon="@drawable/app_icon"
        android:supportsRtl="true"
        android:theme="@style/AppTheme">

        <activity android:name=".MainActivity"
            android:windowSoftInputMode="stateVisible|adjustResize"
            android:screenOrientation="portrait"
            tools:ignore="LockedOrientationActivity">

        </activity>

        <activity android:name=".alert.DialogActivity"
            android:excludeFromRecents="true"
            android:theme="@style/Theme.AppCompat.Dialog"/>

        <activity android:name=".SplashScreen"
            android:theme="@style/Theme.AppCompat.Light.NoActionBar"
            android:screenOrientation="portrait"
            tools:ignore="LockedOrientationActivity">
            <intent-filter android:label="@string/launcher_name">
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
        <receiver android:name=".deleteSurveyNotification.BharosaBroadcastReceiver"/>
    </application>

</manifest>

DialogActivity.kt

class DialogActivity : AppCompatActivity() {
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_dialog)
        this.setFinishOnTouchOutside(true)

        var btnOk : Button = findViewById(R.id.btnOk)

        btnOk.setOnClickListener {
            finish()
        }
    }
}

activity_dialog.xml

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:background="#0072ff"
    android:gravity="center"
    android:orientation="vertical">

    <LinearLayout
        android:layout_width="300dp"
        android:layout_height="wrap_content"
        android:gravity="center"
        android:orientation="vertical">

        <TextView
            android:id="@+id/txtTitle"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:gravity="center"
            android:paddingTop="20dp"
            android:paddingBottom="20dp"
            android:text="Download"
            android:textColorHint="#FFF" />

        <View
            android:id="@+id/viewDivider"
            android:layout_width="match_parent"
            android:layout_height="2dp"
            android:background="#fff"
            android:backgroundTint="@color/white"
            app:layout_constraintBottom_toBottomOf="@id/txtTitle" />

        <TextView
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:gravity="center"
            android:paddingTop="20dp"
            android:paddingBottom="20dp"
            android:text="Your file is download"
            android:textColorHint="#FFF" />


        <Button
            android:id="@+id/btnOk"
            android:layout_width="100dp"
            android:layout_height="40dp"
            android:layout_marginBottom="20dp"
            android:text="Ok"
            android:textAllCaps="false" />
    </LinearLayout>

</LinearLayout>

我在互联网上搜索，但没有得到任何解决方案。请帮帮我

解决方法

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