How can i make an activity go to background without calling its finish() method and return to the Parent activity that started this .I tried so much but it really dint help.So if you guys could help i would be very thankful.
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I am trying to write an application that will dynamically load data to map while user pans or zooms it.
So I need to track when map finished to change its view state (stops panning or zooming) and then load a new portion of data for creating markers. But in fact Google Maps API doesn't have any events to handle this.
There are some methods like creating empty overlay to control onTouch events and so on, but map panning could last long after user finished his touch (cause GMaps use some kind of inertion to make pan smoother).
I've tried to subclass MapView but its draw() method is final thus cannot be overriden.
Any ideas how to make precise handling of pan and zoom finishing?
I want to show a simple toast, when exiting an application. The problem is, that the toast is not shown. I assume it is because the acitivity is finished or because of System.exit(0), but I don't know how to solve it. Does anyone have a tip?
In my activity I have the following code...
Let's say you have a TabActivity with activities A1, A2, A3, and A4. When you click on the different tabs, no matter how many times you navigate between them, when you press the back key you leave the entire tab group, instead of navigating to a previous tab. My problem is, I am not using an actual TabActivity.
Does anyone know how to specify to Android that I'd like to mimic that behavior with a group of activities? The classic solution (that I know of) would to simply finish() the activity as you navigate away from it. That clears the stack, so that when you went from A1 and then to A2, and pressed back, you don't go back to A1.
The problem with using finish() is that I don't want the activity removed from memory. These activities load data from the network, so unless the data was cached, it would need to be reloaded on every navigation which would not be a great user experience.
I was looking at the flags which you can specify how to change this behavior: http://developer.android.com/guide/topics/fundamentals.html#acttask I tried using these: intent.setFlags(Intent.FLAG_ACTIVITY_SINGLE_TOP); intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK); intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP); But no matter what, when I go from A1 to A2 and press back, I always get back to A1.
In trying to clear the navigation stack without using finish()?
Hopefully the title wasn't to confusing but what I meant was the following:
Lets say activity A starts activity B by calling:
Intent myIntent = new Intent(Activity_A.this, Activity_B.class);
Activity_A.this.startActivity(myIntent);
Could I save/free up some memory by finishing Activity_A after Activity_B is begun (if thats even possible). Maybe through the following:
Intent myIntent = new Intent(Activity_A.this, Activity_B.class);
Activity_A.this.startActivity(myIntent);
Activity_A.finish();
Or would Acitivty_A call startActivity() and wait for Activity_B to finish before it called finish()?
The idea would then be that when the users end with Activity_B, it would just restart Acitivity_A (and finish itself in a similar fashion)? Would this create too much overhead? Thanks for any answers and I apologize if the formatting of this post isn't correct.
I created an application which enables the user to set whether he wants to receive notification while the application runs in background mode. If the notifications are enabled an activity should be started (the dialog should appear on the screen).
I tried to enabled it the following way:
CODE:...........
This is the method from main activity. When onPause() is executed isRunningInBackground is set true.
When I tried to debug it when the main application was running in the background the line
startActivity(intent) had no effect (the activity didn't appear).
Does anyone know how to midify the logic in order to start an activity from the main activity when the main activity is running in the background (after onPause() is called)?
i have a set of activities on my stack Say A-->B-->C. when i launch the activity named 'D' it should get fired as the root activity of my application and all the other activities(A,B,C) should get cleared from my stack once Activity D is launched.Can any one tell me as how to do this
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View 3 Replies View Related"Note that when you write an activity, you can make it stop or continue running when it is moved to the background (see onStop() in Activity Lifecycle). For activities that download data from the network, it's recommended to let them continue downloading so the user can multi-task." As far as I was aware I had to create a service if I wanted to have a background activity such as a media player, internet download, or processing of data in files on the SD card continue when the activity was no longer in the foreground.I went and reread the onStop information on the "Activity Lifecycle" page, which was referred to. But I didn't find any mention of how an activity might continue to run in the background after onStop was called.
View 3 Replies View RelatedI need a way for my Activity to known that it's going into the background, and not when it's getting killed. I thought about hooking at onStop(), but onStop() is called for both cases. In other words, is there a way to tell if when my Activity is moving into the background and not getting killed?
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View 4 Replies View RelatedMy use case is writing an overlay controller activity for a landscape camera preview. I followed the instructions from a couple of tutorials for writing a transparent theme.When I start this activity from my root activity, the layout gets drawn correctly, but the background stays black. I tried to use @android:style/Theme.Translucent instead, but this Theme inherits the orientation from the calling activity (landscape) and thats not what I want.The application holding the camera preview is set to landscape view as it does not display the preview correctly in portrait orientation. (see old google bug report)What I wanted to do was to put an independent activity for user interaction interface in front of the camera surface holder (this activity should be set to 'portrait', or even better to 'sensor')
View 3 Replies View RelatedI'm not very familiar with the android SDK yet. I have an application (game), which is developed mainly using the NDK, and uses egl to render. i have an activity which handles the egl swapbuffer and runs the games native main loop, pretty straight forward I guess.
Now I have made another activity which host a TableLayout containing an EditText as well as a button (simply for text-input later used by the game). I spawn this activity from my main activity using startActivityForResult. The small problem I'm having now is that I can't manage to make this "popup" activity to have a background, so my paused game will reside in the background, with the various widgets just overlaid. This is not very pretty in my opinion, and I would like to at least have a solid background color for my spawned activity while it's active. I *could* just simply go into some state in the games main loop which clears the gl-screen just before I spawn the new activity. But I don't like this solution and it's a tad more work then I'm prepared to put in just at this time in the project. I'm pretty sure there is some simple way to just set a background color somehow, I just can't find *any* way to do it, I've looked around in the SDK resources and tried to search for any hints towards this, but i'm just not familiar enough with the java SDK to find what i'm looking for.
On a side note I would also like to be able to center the EditText widget as well as the button on the screen once the Activity is active, I haven't looked very deeply into it yet, but from a quick glance of the documentation I couldn't really find any suitable positioning methods in the tablelayout class. But as I said, haven't looked very hard. Can probably solve that one easy, but i'm just throwing this in as well :)
I have next problem, I have got parent activity and few sub- activities, if app goes to the background by pressed HOME button for long time, all children will be killed, and my app restart from parent activity.
For example: A1 - parent, A2,A3,A4 - sub-activities. A1-->A2-- >A3(top), from A3 I go to the background (HOME). wait 30-40 min and
How can I get background color and text color (default for child views) of an Activity in Java?
View 1 Replies View RelatedI am a bit confused on creating an image which will be acting as a background for my activities. So, in short, my aim is that my application should be able to fit the different screen sizes. Therefore, what size in pixel should my three images be to be able to fill the screen of the device in ldpi, mdpi and hdpi?
View 2 Replies View RelatedMy goal is to develop a GUI application on top of a background image with buttons in specific places on the image. The first step is to display the background.
The image can be displayed with resources and is described in several FAQs including this one:
how-to-add-background-image-to-activity
It compiles and runs without errors, but the background is black. Here is the main.xml file:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout android:id="@+id/rootRL" xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:background="@drawable/background">
</RelativeLayout>
The image has been in png, 9.png, and jpg format with basenames of 'main' and 'background'. It builds but does not display. Making clean and recompiling does not help.
This behavior occurs on both the emulator and on hardware -- an Atmel AT91SAM9M10-G45-EK. The SDK version is 2.0.1.