Develop Reference

Android: How to make AlertDialog disappear on clicking ok button?

I am asking the same question which is asked before at below links but the solution proposed in these links is not working for me so I am posting it again.
How to make an AlertDialog disappear?
Android AlertDialog always exits when I click on OK Button
How to navigate to next activity after user clicks on AlertDialog OK button?
Basically, I am creating an AlertDialog builder to notify the user for asking to enable a setting for the Usage Data Access and when the OK button is pressed then the Settings menu gets opened. When I press back button to come back on the app then the AlertDialog is still available there although I expected to be dismissed to be back on my app.
public void show_alert(){
AlertDialog.Builder builder = new AlertDialog.Builder(this);
builder.setMessage("This application requires access to the Usage Stats Service. Please " +
"ensure that this is enabled in settings, then press the back button to continue ");
builder.setCancelable(true);
builder.setPositiveButton(
"OK",
new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialog, int id) {
Intent intent = new Intent(Settings.ACTION_USAGE_ACCESS_SETTINGS);
startActivity(intent);
dialog.dismiss();
}
});
builder.show();
return;
}
Any hint what wrong could be going here?

Edit after some testing:
I tested OPs code on 6.0.1 and it behaved as expected - i.e. the dialog was dismissed after clicked 'OK'. I'll leave my initial answer below as an alternative that also works. Additional alternatives can be found here.
You can get a reference to your Alert Dialog it from your builder.show() method:
mMyDialog = builder.show();
In your onClick method:
mMyDialog.dismiss();
Full sample:
AlertDialog mMyDialog; // declare AlertDialog
public void show_alert(){
AlertDialog.Builder builder = new AlertDialog.Builder(this);
builder.setMessage("This application requires access to the Usage Stats Service. Please " +
"ensure that this is enabled in settings, then press the back button to continue ");
builder.setCancelable(true);
builder.setPositiveButton(
"OK",
new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialog, int id) {
Intent intent = new Intent(Settings.ACTION_USAGE_ACCESS_SETTINGS);
startActivity(intent);
mMyDialog.dismiss(); // dismiss AlertDialog
}
});
mMyDialog = builder.show(); // assign AlertDialog
return;
}

NullPointerException while calling Intent for Setting

In my code, I displayed an alert dialog when the internet is not available. In that dialog I set a message "Internet Not Available." In that dialog I put two buttons 'Refresh' & 'Setting'. When the internet's gone & dialog comes, I clicked on Setting button it gives
This is the error (Logcat).
E: FATAL EXCEPTION: main Process:
com.appiphy.spacecomp.spinnerframework1, PID: 30424
java.lang.NullPointerException: Attempt to invoke virtual method 'android.app.ActivityThread$ApplicationThread
android.app.ActivityThread.getApplicationThread()' on a null object
reference
at android.app.Activity.startActivityForResult(Activity.java:3823)
at android.app.Activity.startActivityForResult(Activity.java:3784)
at android.support.v4.app.FragmentActivity.startActivityForResult(FragmentActivity.java:784)
at android.app.Activity.startActivity(Activity.java:4094)
at android.app.Activity.startActivity(Activity.java:4062)
at com.appiphy.spacecomp.spinnerframework1.activity.MainActivity$10.onClick(MainActivity.java:967)
at android.support.v7.app.AlertController$ButtonHandler.handleMessage(AlertController.java:157)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5297)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:908)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:703)
startActivity(new Intent(android.provider.Settings.ACTION_SETTINGS));
I used above line to open Settings on a device.
How to solve the above error?

Try this:
AlertDialog.Builder alertDialogBuilder = new AlertDialog.Builder(new ContextThemeWrapper(this, android.R.style.Theme_Holo_Light_Dialog));
alertDialogBuilder
.setMessage("No internet connec" +
"" +
"tion on your device. Would you like to enable it?")
.setTitle("No Internet Connection")
.setCancelable(false)
.setPositiveButton(" Enable Internet ",
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
Intent dialogIntent = new Intent(android.provider.Settings.ACTION_SETTINGS);
dialogIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
startActivity(dialogIntent);
}
});
alertDialogBuilder.setNegativeButton(" Cancel ", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
dialog.cancel();
}
});
AlertDialog alert = alertDialogBuilder.create();
alert.show();
}

I don't know whether your dialog is inside your activity or in some other utility class. If its outside the activity, then you should use context to start the intent. You can pass the context of the activity, and call
Intent intent = new Intent(android.provider.Settings.ACTION_SETTINGS));
mContext.startActivity(intent); mContext is the context which you will pass fro the activity.

DialogFragment - reference from db to MainActivity Android Studio

In my database when a condition is fulfilles i'd like to appear a AlertDialog popup. I've tried to do it in two ways, like this
dataBaseHandler
Cursor c = db.rawQuery(selectQuery, null);
if (c.moveToFirst()) {
result = c.getInt(c.getColumnIndex(KEY_COUPONS_TIMES_TO_USE))
-c.getInt(c.getColumnIndex(KEY_COUPONS_TIMES_USED));
if (result < 4) {
MainActivity alert = new MainActivity();
alert.showAlert();
}
}
MainActivity
public void showAlert() {
AlertDialog.Builder myAlert = new AlertDialog.Builder(this);
myAlert.setMessage("Text").create()
myAlert.show();
}
There's no red errors in the code but when a condition is fulfilled during using the application, critical error appears on the screen. Here's what console says
D/QUERY: UPDATE coupons SET times_used = times_used + 1 WHERE id=1
D/AndroidRuntime: Shutting down VM
W/dalvikvm: threadid=1: thread exiting with
uncaught exception(group=0xa4ccfb20)
[10-17 06:13:14.364 1579: 1724 D/]
HostConnection::get() New Host Connection established 0xb9986d90, tid 1724
E/AndroidRuntime: FATAL EXCEPTION: main
Process: promocje, PID: 2744 java.lang.NullPointerException
at android.content.ContextWrapper.getApplicationInfo
(ContextWrapper.java:152)
at android.view.ContextThemeWrapper.getTheme(ContextThemeWrapper.java:103)
at android.app.AlertDialog.resolveDialogTheme(AlertDialog.java:143)
at android.app.AlertDialog$Builder.<init>(AlertDialog.java:360)
at promocje.MainActivity.showAlert(MainActivity.java:164)
at promocje.db.engine.DatabaseHandler.useCoupon
(DatabaseHandler.java:889)
at promocje.adapter.CouponListAdapter.useCoupon
(CouponListAdapter.java:166)
at promocje.adapter.CouponListAdapter$1$1.onFinish
(CouponListAdapter.java:144)
at android.os.CountDownTimer$1.handleMessage(CountDownTimer.java:118)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:136)
at android.app.ActivityThread.main(ActivityThread.java:5017)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:515)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run
(ZygoteInit.java:779)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:595)
at dalvik.system.NativeStart.main(Native Method)
Application terminated.
I have tried also to this around in alternate way
dataBaseHandler
Cursor c = db.rawQuery(selectQuery, null);
if (c.moveToFirst()) {
result = c.getInt(c.getColumnIndex(KEY_COUPONS_TIMES_TO_USE))
- c.getInt(c.getColumnIndex(KEY_COUPONS_TIMES_USED));
if (result < 4) {
PopUpFragment popup = new PopUpFragment();
popup.show(FragmentManager manager, String tag);
}
New java file with Dialog Fragment
public class PopUpFragment extends DialogFragment {
#Override
public Dialog onCreateDialog(Bundle savedInstanceState) {
// Use the Builder class for convenient dialog construction
AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());
builder.setMessage("I'm a PopUp")
.setPositiveButton("Button 1", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
// POSITIVE BUTTON
}
})
.setNegativeButton("Delete me", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
// User cancelled the dialog
}
});
// Create the AlertDialog object and return it
return builder.create();
}
}
Here i've got some problems with parameters in .show() method.
Any help would be appreciated!

Why does ad.show() fail?

I have this method in which i want to create an AlertDialog but when I call it the application stops working when it reaches ad.show
public void showSettingsAlert() {
AlertDialog.Builder alertDialog = new AlertDialog.Builder(mContext);
// Setting Dialog Title
alertDialog.setTitle("GPS is necessary for Traffic Finder");
// Setting Dialog Message
alertDialog.setMessage("GPS is not enabled. Do you want to go to settings menu?");
// On pressing Settings button
alertDialog.setPositiveButton("Settings", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
Intent intent = new Intent(Settings.ACTION_LOCATION_SOURCE_SETTINGS);
//mContext.startActivity(intent);
startActivity(intent);
}
});
// on pressing cancel button
alertDialog.setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
dialog.cancel();
}
});
// Create Alert Dialog
AlertDialog ad= alertDialog.create();
// Showing Alert Message
ad.show();
}
I get this:
08-26 20:47:11.462 28940-29005/? E/AndroidRuntime﹕ FATAL EXCEPTION: IntentService[CoordinatesService]
Process: com.example.manos.trafficfinder, PID: 28940
android.view.WindowManager$BadTokenException: Unable to add window -- token null is not for an application
at android.view.ViewRootImpl.setView(ViewRootImpl.java:566)
at android.view.WindowManagerGlobal.addView(WindowManagerGlobal.java:282)
at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:85)
at android.app.Dialog.show(Dialog.java:298)
at com.example.manos.trafficfinder.GPSTracker.showSettingsAlert(GPSTracker.java:182)
at com.example.manos.trafficfinder.GeographicCoordinates.getLatitudeString(GeographicCoordinates.java:32)
at com.example.manos.trafficfinder.DataManagement.addPosition(DataManagement.java:116)
at com.example.manos.trafficfinder.CoordinatesService.onHandleIntent(CoordinatesService.java:28)
at android.app.IntentService$ServiceHandler.handleMessage(IntentService.java:65)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:135)
at android.os.HandlerThread.run(HandlerThread.java:61)

The Context passed to AlertDialog.Builder seems incorrect. Try YourClass.this instead of mContext.

Returning AlertDialog from Standard Java Class

I am currently working on an android project. I am trying to have an alert dialogue in a standard java class so that the code can be re-used throughout the app.
However, it is returning the alertdialog from the class back to the activity but when I attempt to show the alert dialog it displays the following error:
Unable to add window -- token null is not for an application
Below is the code that I have used to create the alert dialogue
public AlertDialog showAlertDialog(String message, Context context)
{
AlertDialog.Builder builder = new AlertDialog.Builder(context);
builder.setMessage("hello")
.setCancelable(false)
.setPositiveButton("Yes", new OnClickListener() {
#Override
public void onClick(DialogInterface dialog, int id) {
dialog.cancel();
}
});
AlertDialog alert = builder.create();
return alert;
}
Below is the code from the android activity where I am trying to show the alert dialog
Common cla = new Common();
AlertDialog alert = cla.showAlertDialog("Hello", getApplicationContext());
alert.show();
Common is the name of the class

Please chage your AlerDialogCreation logic to AlertDialog.Builder builder = new AlertDialog.Builder(yourActivity.this);