Android : Program On Application - Not Activity - Exit
Jul 22, 2009
I have requirement that needs to save data to a file. During multiple Activitiy screens, I add different data to a list and finally when user is not using the app (means if user exits app by pressing "home" button or "call" button), just before exiting that app, i want to save that data of the list to a file.
coding before exiting activity screen is simple - by calling onDestory () method, but here I want not one activity but the application exit.
So my question is How do I write a code that will be executed just before application exits ? I tried created one class extends Application, and then I override onTerminate() method, but it's not get called when I exit ( pressing home button on device)
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Jul 22, 2010
I have started my GPS programmatically by Intent myIntent = new intent(Settings.ACTION_SECURITY_SETTINGS);
mContext.startActivity(myIntent);
How i will turn Off GPS when i exit from my program...
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May 18, 2010
When exiting the activity in a thread in a SurfaceView. This log appears in this situation:.............
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Feb 6, 2009
How to set RESULT_OK when activity exit? I am launching list activity from main activity using startActivityForResult, after doing work with list activity; i exit from it from it using "finish()" but it doesn't propagate RESULT_OK to main activity in onActivityResult(), what should I do , so that listact should return RESULT_OK.
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Jan 11, 2010
How to animate activity entrance and exit? And activity relaunch after onNewIntent()?I used android:theme in the manifest file but it didn't work for me.
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Dec 2, 2009
what puzzle me so much is that i can't destroy a GLSurfaceView while i don't want to exit the activity.
the fact is when i destroy a GLSurfaceView which had show in the screen (that means it has binded to the activity's SurfaceHolder), the activity exits without any prompting. Perhaps ,the Context which provided in the Construction of GLSurfaceView joins the two things together. so my conclusion is that a GLSurfaceView can only be destroyed when exit the activity. is there anyway to destroy a GLSurfaceView without exit activity? is there someone can provide a clue?
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Jan 21, 2010
I've been using System.exit to quit the application. Is Activity.finish a better approach? What would be the differences?
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Dec 3, 2009
I'm having this strange issue where upon exiting a subactivity that is translucent (android:theme="@android: style/Theme.Translucent" ) the onStop() method doesn't appear to be called. have a TimerTask that runs and is supposed to be terminated when the subactivity ends in the onStop() method, but I'm instead left with an orphaned thread running in the background. It go particularly bad when I ran the subactivity several times. When I revert to no theme, the onStop() method is called and the activity behaves properly. Is there something I missed about how Translucent activities'lifecycles differ from standard activities?
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May 3, 2010
What I am trying to do is emulating the "Home" button which takes one back to Android's homescreen. So here is what causes me problems: I have 3 launcher activities. The first one (which is connected to the homescreen icon) is just a (password protected) configuration activity. It will not be used by the user (just admin) One of the other 2 (both accessed via an app widget) is a questionnaire app. I'm allowing to jump back between questions via the Back button or a GUI back button as well. When the questionnaire is finished I sum up the answers given and provide a "Finish" button which should take the user back to the home screen.
For the questionnaire app I use a single activity (called ItemActivity) which calls itself (is that recursion as well when using intents?) to jump from one question to another:
Questionnaire.serializeToXML();
Intent i = new Intent().setClass(c, ItemActivity.class);
if(Questionnaire.instance.getCurrentItemNo() == Questionnaire.instance.getAmountOfItems()) {
Questionnaire.instance.setCompleted(true);
} else Questionnaire.instance.nextItem();
startActivity(i);
The final screen shows something like "Thank you for participating" as well as the formerly described button which should take one back to the homescreen. But I don't really get how to exit the Activity properly. I've e.g. used this.finish(); but this strangely brings up the "Thank you" screen again. So how can I just exit by jumping back to the homescreen?
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Jun 23, 2010
I have faced with issue about startActivityForResult() and onActivityResult(). If child activity started by the startActivityForResult() exit by unexpected exception the onActivityResult() is not called and I have no any ideas how can I handle this to get application working in a fail-safe manner ?
When my code runs child activity with startActivityForResult() it awaits until onActivityResult() will be invoked to get working further, but onActivityResult() is not calling and my code is "hang- up" (logically).
So the question is how can I handle all possible ways the child activity is finished (normally and by unexpected exception) to get fail-safe code ?
I have check the documentation for this issue but have found nothing relating issue.
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Nov 5, 2009
I want to know about How to exit an application.
In my application there is a button called Exit. when i click the button it should end the application. I trie with finish(). It is not working. It is closing only the current scrren. I need to close all the screens.
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Oct 17, 2010
I notice that my application continues to run in the background after I hit the home or back button. I tried calling the finish() method and it still says its running. On another note, how do I setup the keyListener to respond to the user hitting the back or home button. I tried implementing OnKeyListener and using findViewById(R.Layout.main).setOnKeyListener(this) to call finish().
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Jul 29, 2010
How to exit the current application on a click of any button when I am in the middle of my application? finish() will only finish the current activity not all the activities.
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Sep 8, 2010
I need to have a "Exit" menu items in my application,My question here is how can i just exit the app,Please throw some light on this is that possible in android if yes then how.
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Nov 24, 2010
the problem is that this button doesn't exit of my app... it simply closes the current intent ant returns to the previous intent (window) of my app.... how i can do a real exit/close button? i tryed with this:
Intent intent = new Intent(Intent.ACTION_MAIN);
intent.addCategory(Intent.CATEGORY_HOME);
intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
startActivity(intent);
but it doesn't works, because when i turn back into my app, the app comes in the last opened window, and not in the first window of the app, how i can do that? i need that when i re-open my app it starts on the first window of my app
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Sep 24, 2010
Either exit button or back button only can be implemented in my application. But i want both the implementations in my application
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Aug 10, 2009
i want to add an exit button to the menu, but didn't see an easy way to close an application or acces all activities of an application and finish them. Is there an easy approach available?
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Apr 18, 2010
Is it possible to stop all started services when the user hits the Home Button? I use:
startService(new Intent(ClassName.this, ClassName2.class));
stopService(new Intent(ClassName.this, ClassName2.class));
This means I will have to somehow add the 'stopService()' for 7+ of my app classes
I've researched this topic and I think there's 'onTerminate' but still not sure how this should be implemented.
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Apr 13, 2010
How do you do this?
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Feb 13, 2010
I've been trying to show a "Do you want to exit?", type dialog when user attempts to exit an activity. However can't find the appropriate API hooks. Activity.onUserLeaveHint() initially looked promising, but I can't find a way to stop the activity finishing.
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Jul 30, 2010
In my current application design, I have an activity class application.java (which starts on launching the application), and it does not have a layout(UI screen). I call another class called servicebind.java from the onCreate method of my 1st class. here I bind to the local server (bindServer()). i call back the application class through an intent. Once I am back to my application class, I call my activity class called welcome.java which has a layout/UI. When I run this application, I am able to see the welcome screen. But the problem is, when I click on the back button, I get a black screen with just the title on top. I have to hit back button 3 times to exit the application.
The reason I see from the logs is that, the 1st 2 activity classes (application.java and services.java) does not get destroyed unless I hit the back button. So the 1st time I hit back button, the welcome activity gets destroyed. the next back button destroys the servicebind class and final back destroys the application class. Is the reason because these classes dont have a UI to display in the onCreate method. I do not want to change my design where I bind the service in the servicebind class and call the welcome activity in the application class.
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Nov 18, 2010
Has anyone experienced the sudden exit from an application or browser? It happens intermittantly on my phone where it will suddenly exit out with a vibration or two and return to main page. This has happened infrequently but many times in the past couple weeks.
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Oct 31, 2010
I use a file browser to locate the APK, it installs successful and I can run it OK (when clicking "run" after install completes) However, if I then exit the application, I'm unable to see a launcher for it on my apps menu (where I would expect it, like other apps I've created) At the moment, every time I want to run the app, I first have to re-install it so I can access it, surely there must be a better way?
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.jameselsey"
android:versionCode="1"
android:versionName="1.0"
>
<application android:icon="@drawable/globe" android:label="@string/app_name"
android:theme="@android:style/Theme.NoTitleBar">..................
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Mar 1, 2010
on intent when user press back button should exit from the application, how can i track back button and exit from the app?
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Jan 27, 2009
should an Android application have an exit button (or menu function) or not? Ok, if there's some service or other resources consuming something running in the background I think the user should have an option to make it stop. But what about an application that would just sit there, inactive? If I take a look at the standard application it seems that the Android philosophy is to keep the applications running and let the system decide when to stop and destroy an application idling in the background. I didn't recognize "exit" or "quit" options in the standard programs. On the other hand - why not let the user decide and give the option to quit some software if he knows it's currently not used. So, what's the advice here? Give even a "passive" application an exit button? Or not and just leave it to the system?
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Nov 30, 2009
I have an issue with identifying return to application after it was left using Home click. The main purpose of this is to define when do I have to display to user Type Password dialog. So, let's imaging such workflow, User works in application and decides to see what's the weather tomorrow. The User clicks Home button and is transfered to desktop. Now he goes back to My application. At this point we have to verify that our User is still the right one User by proposing him to type password. How can I identify this condition here? (returning after leaving by Home click)
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Oct 27, 2010
public class TestCamera extends Activity implements SurfaceHolder.Callback, View.OnClickListener {
Camera.PictureCallback mPictureCallback = new Camera.PictureCallback() {
@Override
public void onPictureTaken(byte[] data, Camera camera) {
// TODO Auto-generated method stub
picture = data } };
@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
if ((keyCode == KeyEvent.KEYCODE_DPAD_CENTER)) {
mCamera.takePicture(null, null, mPictureCallback);
return true; }
return super.onKeyDown(keyCode, event); }
@Override
public void onClick(View view) {
switch(view.getId()) {
case R.id.camera:
picture_intent = new Intent(this, PictureViewer.class);
picture_intent.putExtra("picture", picture);
mCamera.startPreview();
startActivity(picture_intent); } }
In the emulator, the program behaves like it should. However, when I put this application on my phone (Nexus one), it doesn't switch to the new Activity when I touch the screen after I take a picture. If I touch the screen without taking a picture, it switches to the new activity. I can't figure out why my phone won't switch to the new Activity after taking a picture.
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Dec 12, 2009
I have a normal Java application, normally, we start an Android application from a Main Activity, now I must start it from my application.
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Oct 1, 2010
I have a simple activity program in android. Basically the class just extends Activity.
But when I start it I get a ClassCastException in the constructor of my class. I don't even have a constructor defined, so it must be in the constructor of the superclass which is Activity. Unfortunately the debugger doesn't give any detailed information on what class it is trying to cast. Here is the stacktrace:
Thread [<1> main] (Suspended (exception RuntimeException))
ActivityThread$PackageInfo.makeApplication(boolean, Instrumentation) line: 649
ActivityThread.handleBindApplication(ActivityThread$AppBindData) line: 4232
ActivityThread.access$3000(ActivityThread, ActivityThread$AppBindData) line: 125
ActivityThread$H.handleMessage(Message) line: 2071
ActivityThread$H(Handler).dispatchMessage(Message) line: 99
Looper.loop() line: 123
ActivityThread.main(String[]) line: 4627
Method.invokeNative(Object, Object[], Class, Class[], Class, int, boolean) line: not available [native method]
Method.invoke(Object, Object...) line: 521
ZygoteInit$MethodAndArgsCaller.run() line: 868
ZygoteInit.main(String[]) line: 626
NativeStart.main(String[]) line: not available [native method]
And when I look into this runtimeexception I get:
detailMessage "Unable to instantiate application com.test.MyApp: java.lang.ClassCastException: com.test.MyApp" (id=830067694464)
The only code is:
package com.test;
import android.app.Activity;
public class MyApp extends Activity {
}
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Jul 8, 2010
What I want to do is I am working on a game of life program. I want to take the time delay and make it a preference, but I want to make it available for people to type in a specific time. The number can be in miliseconds or seconds. However I'm a little stuck on how to proceed, I haven't been able to find a simple preference that already handles this, but there might be one. Is there an easy way to make this preference and confirm that the entered data is an integer or afloat?
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