Android :: Ensure Only One View.Renderer?instance Of GLSurfaceView / GLSurface
Aug 22, 2009
i am using android.opengl.GLSurfaceView in my game, which is working well expect under one condition: Starting the game a second time after leaving it by pushing the home button, causes the game to flicker, because the rendering thread from the previous instance is still running and firing OpenGL commands. Now the question is, how can i ensure that only one instance of GLSurfaceView/GLSurfaceView.Renderer gets created?
To solve/workaround the problem i've tried to set the following properties in the manifest file to to ensure the activity gets shut down if it gets inactive.
android:configChanges="keyboardHidden|orientation"
android:launchMode="singleTask"
android:multiprocess="false"
android:noHistory="true">
But without success, the activity/rendering thread still keeps running. Do you know of any certain way to exit the rendering thread/free GLSurfaceView?
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Jun 10, 2009
I've run into an issue where performing a lot of touch events seem to block the move events from the trackball. Anyone else run into this issues? I can't use the Thread.sleep() fix because that will obviously stop all input, so I'm hoping someone has been able to throttle the touch command without effecting the move ones.
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Oct 2, 2009
I open an Activity which has a number of elements... some TextViews, some Buttons, and an EditText. For some reason, when the activity starts, the EditText is focused by default, which causes the keypad to appear hiding the screen. I only want this EditText to be in focus if the user clicks into it. How can I ensure that this View isn't in focus when the activity starts? I've tried calling requestFocus() on one of the buttons, but it hasn't changed anything. Ideally, I don't want anything in focus at all.
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Mar 2, 2010
How do I ensure that I get the 'resize' behavior when the IME is shown/hidden?
I've included the following in my manifest:
android:windowSoftInputMode="adjustResize"
What else am I supposed to add? I've read that the container that the View is placed in should 'support resize' but what layouts support this?
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Aug 19, 2009
I've noticed that OpenGLContext is removed from 1.5. Everybody says that GLSurfaceView should be used instead. Does this mean that there is no way to render OpenGL graphics into a regular View?
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Sep 9, 2009
I've got a custom view that has been set as the content view and inflated from xml. How can I access the instance to call methods on it from the activity class? I remember seeing something akin to getResourceById() a while back, but now I can't seem to find it and I'm not even sure if that's the best way to do it.
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May 11, 2010
I am creating an app that uses GPS coordinates. Can anyone help me with the following?
1) I want to ensure I am using a current 'fixed' location and not a previously stored one, so I am trying to avoid using getLastKnownLocation, but cannot seem to figure out the alternate to this?
2) What is the best way to display a "please wait" message or something along those lines while the GPS service is attempting to get a fix (and ideally periodically allow the user to cancel out)?
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Sep 17, 2010
If I have my app fetching content from my server, what mechanism should I use on my server to ensure that its my app making the request? Is there any way that I can sign the request to using my app's signature to show its come from my app and not from a stolen version or copycat?
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Nov 23, 2010
Is there a truefire way to make sure my app will display the same on my Motorola Droid 2 as it will on other Androids? I use nothing more than basic Linear Layouts, Image Views, Buttons etc - is there a good checklist to go by before I even think about launching an app?
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Jan 1, 2010
Is there a way that I can make sure a given item in an android listview is entirely visible I'd like to be able to programmatically scroll to a specific item, like when I press a button for example.
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Jun 25, 2010
I have a service that will monitor location changes daily. What I know so far that to start a service at boot, I have to follow the linked tutorial. This way I can get the service started at boot, but to save battery I need it only between 9am-9pm.
Question is pretty simple, so I will repeat:
How can I ensure a service is started at 9am and stopped 9pm every day?
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Oct 5, 2010
My application opens in Activity A1. None of the views in A1 are focused at startup, until I use the arrow keys to navigate through the views. A button press in A1 launches activity A2. When A2 opens, the first Button in A2 is focused by default. I do not want this happen. What I want is when A2 opens, none of the buttons are focused until arrow keys are used to naviagte through them(just like it is in A1).
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Nov 20, 2009
I am having trouble in finding out the right settings for my emulator to simulate the Motorola Droid. Does anyone know with what settings should I create my emulator, so that I can emulate the Droid handset?
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Apr 20, 2010
Building an iPhone OS application that will allow users to anonymously post information to a web application (in my particular case it will be a Rails based site) ... and I want to ensure that I only accept posts that originate from a specific application running on an iPhone/iTouch. How is this best accomplished? (btw, if your answer applies to Android please feel free to post it here as well as I'm curious to know if the techniques are the same or vary).
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Oct 28, 2010
Is there a way to ensure that my Android UI will display as expected across different phones ?
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Jun 21, 2010
i have a problem with double values i need to store in an android homed sqlite database. since these double values represent gps values (lat & lng), i really NEED an absolute precision down to the 9th number after the comma.when reading lng from this table into some (java) double variable, i get a value like "0.999956837" - this renders the values pretty useless to me.is there a way to enforce the precision i need other than storing the values as "text" fields (what would make expensive casts neccessary) or storing them as integers (meaning i need to multiply/divide at each write/read-op)?
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Feb 25, 2009
I'm developing a coloring book app, how do I ensure that the black outlines of my drawing are not colored by the paint brush? I thought of decreasing the alpha value of the paint brush to show the black outlines when painting over them but upon painting the same area again, the black outlines will be painted over.
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Sep 7, 2010
Hello all. I like to cut and splice my video files together to make one movie. I usually do this with Windows movie maker. That program doesn't recognize the .3gp format that the video files are in when I take them off the phone. So, I convert them to .avi. Is there a program that will ensure that the 720p quality is maintained through the conversion to .avi, or is there another format I should be converting them into? I can't remember the program I use now, but it doesn't look like it is staying in 720p quality. After making the complete video on windows movie maker I get an option to export the video in 720p, but if the input video is not 720p, the final output cannot be 720p right?
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Jun 12, 2009
i want to start programming in OpenGL on Android, but Eclipse can't find the GLSurfaceView. I'm using the 1.5 SDK. Do I have to set specific entries in the build path?
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Nov 30, 2009
Following the samples and examples, I've successfully been able to load a model on screen and rotate it with the DPAD keys and overriding the onKeyDown method of the GLSurfaceView. Trying to use a letter though, causes a small box to appear at the bottom accepting the text that is being typed. What I'm not entirely clear on, is since I don't have a listener defined in the main Activity, why those key letter key presses are being intercepted by some other inherent listener(?). I setup an OnKeyListener for the view to call my own method and that does work... but I'm wondering if there is perhaps a better way to handle it.
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Sep 3, 2010
I am a lazybones using GLSurfaceView and loving it. But now that my code is running too darn fast (heh), I would like to slow it down via setting eglSwapInterval to 2 or something. Just to be nice to the battery. But, being a lazybones, I can find no way of doing this when using GLSurfaceView. (and hacking an early return from onDrawFrame() was very unsatisfying).
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Mar 31, 2010
currently GLSurfaceView is not supported in app widget .can we make changes to framework to make it support? is there any limitation? if possible what framework change is required?
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Jul 27, 2009
We are developing an application that uses a GLSurfaceView to display 3D objects. We regularly get the "Application Not Responding" dialog. Inspection of the dumped threads reveals something that looks suspiciously like a deadlock. I have added the three thread dumps involved below. The first thread is the main application event thread, and it is waiting on a join with a GLThread.
The second thread is a brand new GLThread that is waiting for a semaphore lock presumably so it knows it has exclusive access to the graphics hardware. The third thread is probably a previous GLThread (the one the main thread is waiting for to finish), that is waiting to be notified. The strange thing is that the main application thread has just done a "mDone=true; notify();" prior to calling "wait()", so the third thread should have been awaken? .........................
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Dec 16, 2009
Look at this: http://nhenze.net/?p=172
They show that it is possible to put an GLSurfaceview on top on a SurfaceView. I hope it would be useful.
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Sep 15, 2010
I'm having difficulties with ensuring I get a reminder alert for when each of my contacts birthday is due. This seems a remarkable omission for a phone. All my previous phones have just performed this function without needing any setting up, assuming the birthday is set in the contact. I have so far learned that you need to ensure you have changed the settings in Google Calendar online: Settings -> Calendar Settings -> Calendars tab -> Browse Interesting Calendars -> More tab -> Subscribe to Contacts' Birthdays and Events.I have done this, and now the birthdays appear in the Calendar application on the phone. Can someone please enlighten me on how I can ensure an alert is generated for these birthday reminders in the calendar?
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Mar 18, 2010
I'm using GLSurfaceView to create a simple OpenGL drawing application. Since the elements drawn in each frame must remain on screen in order to be composed into the whole drawing, I don't use gl.glClear(GL10.GL_COLOR_BUFFER_BIT) at the beginning of each frame. But not clearing the color buffer leads to substantial flickering. Is there any way to eliminate flickering while still not clearing the screen at the beginning of each frame?
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May 12, 2010
I am able to get a GLSurfaceView to have a transparent background with:
CODE:............
when I set the Activity's window background to transparent and the GLSurfaceView is the contentView of the Activity.
But, let's say my GLSurfaceview is parented by a ViewGroup and I want GLSurfaceView bg to be transparent to see the Viewgroup's background - I am not able to do so with the code above. Is this a limitation or am I missing something?
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Nov 4, 2009
I have an application that uses GLSurfaceView to draw OpenGL ES graphics. This is all working (mostly) how I would expect.
Now, I would like to implement a screenshot feature. For normal views, it seems that the standard practice is to create a new Canvas with a Bitmap and then draw to that Canvas using View.onDraw(Canvas).
I've tried using SurfaceView.draw(Canvas) in a similar fashion, but it always results in a blank (black) image.
I've also tried using the drawing cache with the exact same result.
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Apr 12, 2010
how to draw text on GLSurfaceView in Android?
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Jul 22, 2009
How can one use a GLSurfaceView similar to a ViewGroup, in the sense of adding Views(CustomViews) over it? Is there any means to make the GLSurfaceView be the canvas on which the view draws its contents?
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