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POopenGL texturing is running on emulator but not on real device
 

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  1. POopenGL texturing is running on emulator but not on real device
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    <p>I'm trying to show textures by openGL. In following code I want to draw simple square with texture. When I run it on android emulator, everything is OK, but when I run it on real device, I can see only white square without any texture.</p> <p><a href="https://stackoverflow.com/questions/8587661/cant-map-textures-with-opengl-es-on-real-devices">There is similar problem</a>, but I don't use NDK. I use only Java.</p> <pre><code>public class MainActivity extends Activity { public static TextView t; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); LinearLayout l = new LinearLayout(this); t = new TextView(this); l.addView(t); l.setOrientation(1); l.addView(new ImageView(this)); setContentView(l); } long last = System.currentTimeMillis(); int FPS = 0; //Show FPS(+ some extraData) public void FPS(final String extraData) { if(System.currentTimeMillis()&lt;last+1000) { FPS++; } else { runOnUiThread(new Runnable(){@Override public void run(){ t.setText((double)FPS/(((double)System.currentTimeMillis()-last)/1000)+";"+extraData); }}); FPS = 0; last = System.currentTimeMillis(); } } public class ImageView extends GLSurfaceView implements GLSurfaceView.Renderer { MainActivity thiz; public ImageView(MainActivity thiz) { super(thiz); this.thiz = thiz; setRenderer(this); } FloatBuffer vertex; ShortBuffer texture; int[] textureID = new int[1]; public void onDrawFrame(GL10 gl) { gl.glClear(GL10.GL_COLOR_BUFFER_BIT); gl.glVertexPointer(2, GL10.GL_FLOAT, 0, vertex); gl.glTexCoordPointer(2, GL10.GL_SHORT, 0, texture); gl.glDrawArrays(GL10.GL_TRIANGLE_STRIP, 0, 4); thiz.FPS(""); } public void onSurfaceCreated(GL10 gl, EGLConfig arg1) { vertex = FloatBuffer.wrap(new float[]{-0.5f, -0.5f, 0.5f, -0.5f, -0.5f, 0.5f, 0.5f, 0.5f}); texture = ShortBuffer.wrap(new short[]{0, 1, 1, 1, 0, 0, 1, 0}); Bitmap b = BitmapFactory.decodeResource(thiz.getResources(), R.drawable.nex2); gl.glGenTextures(1, textureID, 0); gl.glBindTexture(GL10.GL_TEXTURE_2D, textureID[0]); GLUtils.texImage2D(GL10.GL_TEXTURE_2D, 0, b, 0); b.recycle(); gl.glClearColor(0.1f, 0.5f, 1f, 1f); gl.glEnable(GL10.GL_TEXTURE_2D); gl.glEnableClientState(GL10.GL_VERTEX_ARRAY); gl.glEnableClientState(GL10.GL_TEXTURE_COORD_ARRAY); } public void onSurfaceChanged(GL10 gl, int w, int h) { gl.glViewport(0, 0, w, h); } </code></pre> <p>Can someone look at my code and tell me where is the problem?</p>
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    1. COHave you copied the texture resource to your device? Guess you would get a runtime error if you hadn't... I'm not familiar with Android GL10, but you could try calling glEnable(GL_TEXTURE_2D) before glDrawArrays, incase some other app or part of your app deactivated it.
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    2. COTexture is in .apk file. I load it like this. "Bitmap b = BitmapFactory.decodeResource(thiz.getResources(), R.drawable.nex2);" And if i move glEnable(GL10.GL_TEXTURE_2D) before glDrawArrays it makes no change.
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    3. COHave you tried glGetError?
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