Android :: Screen Flickering In GLSurfaceView
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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Aug 6, 2010
I have a strange problem with Galaxy S, can somebody please check if they do experience the same thing.
My battery is low (about 13%), I'm connecting SGS through WiFi to the Interent. Any time the device is downloading something: web page, image from Picasa, etc. on the screen appears flickering tiny lines, like magnitic distortion. Once page fully loaded screen become nice and clear. If I plug power, USB, the screen and download happens normally. I tried different setting (brightness of screen, vibration on/off, stay away from electronic devices)
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Jul 20, 2010
Had my desire on charge last night as usual, woke up in middle of the night, hit the button on the top of the desire so i could see the time, but rather than the screen lock appearing my homepage appeared but it was rapidly flashing between that and a white screen and was unresponsive. I have the spinning earth and moon live wallpaper for weeks now and the moon was moving back and forth a tiny amount much like when you press pause on an old VCR.
After a few seconds swiping with my finger it eventually responded and the flickering went but came back when i swiped screens once more. i unplugged it from the charger and it did it again.
I then took the battery out and put it back in and since then it seems to be working normally. I also noted that the clock had been frozen at 00.15, when i resolved the prob it jumped to the true time of 03.30. 00.15 was probably about the time i put it on charge so has plugging it in caused it to lock up?
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Apr 24, 2010
For some strange reason everynow & then my Desire has some background noise when browsing. I'm not using wi-fi, just my data. It's happening now as I type.
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Aug 23, 2010
I have made a sample application to flip through different layouts in a viewflipper.
XML is basically (pseudo-code)
<ViewFlipper>
<LinearLayout><TextView text:"this is the first page" /></LinearLayout>
<LinearLayout><TextView text:"this is the second page" /></LinearLayout>
<LinearLayout><TextView text:"this is the third page" /></LinearLayout>
</ViewFlipper>...........
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Sep 20, 2010
I was using the camera this morning and after a few seconds the screen started flickering, it then turned a shade of purple and the view split so the bottom of the picture appeared at the top. I rebooted the phone and it was fine for about 30 seconds and then did the same. Second reboot and it appears to be ok. Just wondering if anyone else has had this issue? All software is as standard the phone has not been rooted (yet).
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Nov 6, 2009
Anyone having problems with flickering screen when on a call while plugged into home charger? i thought i was in a rave with my phone acting like a stobe machine.
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Aug 18, 2010
I bought my Droid 2 last week, after trading it in from an LG Ally. It's quite awesome! But little droidy is sick ): The screen is constantly banding and flickering, sometimes at different strengths. At points it's hard to look at the screen and hurts your eyes. I heard this happened with the Droid X's as well. Sadly, the day after I got my Droid 2, my 30-days (I got it at best buy) to exchange the phone ran up :<
Is there anything I can do so they can exchange this? They sold me a defective product for $200! D: I think they should listen and give me a working model.
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Jan 18, 2014
My device is a local re-branded and enhanced Xolo a500s/it's like a karbon a5 a think. After successfully updated my device via OTA and after my device rebooted. My screen started to flicker randomly. My phone is not rooted and im still using the official stock rom. I found a temporarily solution by doing a Factory Reset, the flickering would be gone but it will come back after my phone screen goes off and on.
I suspect that the new lockscreen bloatware system app that comes with the update causes this, I can't disable it(googled already, and the only way to freeze/remove it is to root.) I can't root my device for something like a hunch. I'm waiting for a software update that would fix my device's touchscreen collide bug.
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Apr 12, 2010
I've been block by this question for about a week. I tried to implement a simple application: show a image, when user touch on screen, I want to create a GLSurfaceView to cover the previous image. Then show some 3D effects on this GLSurfaceView.
The logic is quite simple. But I have a serious problem. When GLSurfaceView comes out, the whole screen become black, after 1-2 seconds, the GLSurfaceView with texture shows up. Is there any way to make this smoothly? The 1-2 second black screen is really a bad user experience.
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Jan 16, 2010
Just wondering if anyone else had noticed faint flickering issues with their Behold 2 screens? I especially notice it with smooth gray scale gradients, soft focus wallpapers, or solid color mid tones. Also, some color banding in grey mid tones... looks like faintly alternating horizontal lines of green and magenta. I work in digital imaging professionally, so I really notice such things. Can't decide if I'm being overly critical, or if my phone has an issue.
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Apr 4, 2012
cant post a link to the video on youtube but the video on youtube, same problem on 2 different phones.
SCH i500 with 2.3.5 firmware
Bb is S:i500.04 K.E120
Kernel is 2.6.35.7
Build is SCH I500.E120
ive done a reset that didnt work, it doesnt happen all the time it just seems to have a mind of its own.
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Apr 13, 2014
i just tried to root my note 2 but after the oden process my screen started to flickering and flashing.
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Aug 23, 2010
I noticed something is wrong with my phone. when i enter the browser after switching from 3G to wifi, the screen will flicker... anyone know any fix for this? or the reason the screen flickers?
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Jun 30, 2010
Yesterday I updated my HTC Desire to 1.21 ....And today I noticed that when i have the screen with more white than any other color (like the notification screen for example) the screen flickers, and it does this with little horizontal lines...
I also realized 2 things:
1. it flickers when the automatic brightness is on and I am inside (so the brightness was set to under 25%)
2. It flickers with battery fully charged once the voltage got under 4.08v, it stopped..
Has anyone seen this on the desire after the update or before? Is this normal? Is my phone faulty?
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Oct 3, 2010
I have a ViewFlipper with two ImageView widgets. I have set the in and out animation as android.R.anim.slide_in_left and android.R.anim.slide_out_right
Now when the two ImageViews have two different drawables, then the animation is sleek and smooth. But when I set the both the ImageViews to the same Drawable, the screen flickers. Why is this happening and how do I prevent it?
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Aug 26, 2010
I am doing an application-infinitely rotating 3D cylinder in openGl.The speed varies with finger touch but wen i reduce the speed,i can see flickering happening in animation towards right and left.Initialy I thought it is because of the linked list im updating but found out there is no such problem with my linked list .I'm using a thread here for a small delay after each 30 degree rotation drawing.I cant do it widout the thread coz i need a sleep or a delay after each 30 degree drawing,if i remove the thread and implement the code in thread inside my onDraw frame, the curvature rotation itself goes and it appears that images are just left shifting n right shifting coz the sleep is not getting identified in onDraw frame.So i cant implement my logic here widout using thread..so thread is a must in my logic but i guess the flickering is due to my thread...Is the flickering issue during animation because of the thread?please do help me with this flickering issue......
This is d thread part im using in my code.........
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Oct 3, 2009
I'm trying to clean up some rendering issues for a 3D game -- CowPotato (http://www.cyrket.com/package/ com.froogloid.android.cowpotato).
Basically I'm seeing some flickering, like the next frame is getting flushed before everything is drawn. It is definitely the last few items in my display list that seem to flicker -- if I reorder the list, it's always the last part of the list that flickers.
I understand that the GLSurfaceView automatically provides double- buffering -- it certainly appears to be the case looking at the source. So any suggestions as to why I might be seeing flicker? I put counters into the drawing methods to make sure that all the objects are called each frame, they just don't show up on screen all the time.
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May 10, 2010
while scroll the listview, the Layouts background gets flickering. that is the layout is has a background image. this image will gets invisible and reload all the time while scrolling. how to rectify this? Any Idea?
Note: its happening for inbuilt android Array Adapter too.
CODE:.................
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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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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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Mar 23, 2010
I'd like to display some 3d object on top of the normal 2d ui layout screen. The 2d ui screen has background image, and GLSurfaceView is child of the content layout. I tried the same technique of the Translucent GLSurfaceView in ApiDemos sample, but GLSurfaceView clears all and shows black background. Code...
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