单击通知操作按钮后打开当前屏幕
Open the current screen after clicking the notification action button
应用中有很多片段，如片段A、片段B和片段C。当应用程序显示 fragmentB 并且用户单击通知上的删除按钮时，fragmentB 上会出现一个对话框，该对话框正常工作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上，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 上（最后打开的 screen/fragment）并且应用程序应该出现在前台。请注意，此片段 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(),0,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,0,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 activity 如下所示，我需要从中删除应用程序标签 (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。请帮助我
为什么您为此目的使用 BroadcastReceiver 而不是 Activity？
最好在您的应用程序中启动 Activity 以显示此“删除”对话框。这会将您的应用程序带到前台（无论它处于什么状态）并在其上启动新的 Activity。您可以显示您的对话框，当对话框完成时，您可以完成 () Activity 并将用户以任何状态放回到您的应用程序中。
如果您只想显示对话框，您可以使用透明的 Activity 来承载它，或者您可以使用以对话框为主题的 Activity（Activity看起来像一个对话框）用于此目的。
应用中有很多片段，如片段A、片段B和片段C。当应用程序显示 fragmentB 并且用户单击通知上的删除按钮时，fragmentB 上会出现一个对话框，该对话框正常工作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上，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 上（最后打开的 screen/fragment）并且应用程序应该出现在前台。请注意，此片段 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(),0,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,0,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 activity 如下所示，我需要从中删除应用程序标签 (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。请帮助我
为什么您为此目的使用 BroadcastReceiver 而不是 Activity？
最好在您的应用程序中启动 Activity 以显示此“删除”对话框。这会将您的应用程序带到前台（无论它处于什么状态）并在其上启动新的 Activity。您可以显示您的对话框，当对话框完成时，您可以完成 () Activity 并将用户以任何状态放回到您的应用程序中。
如果您只想显示对话框，您可以使用透明的 Activity 来承载它，或者您可以使用以对话框为主题的 Activity（Activity看起来像一个对话框）用于此目的。