Android SDK // Eclipse // OPENGL ES 2.0 -> Shader Question


i try to use openGL ES 2.0 Shader …but i am not able to load the vertex/fragment source

opengl 2.0 is supported at my mobile phone ( info.getGlEsVersion() -> 2.0)

i am using the android sdk (sdk manager) under Win7 with eclipse.

testing at samsung galaxy s2 and the emulator

i downloaded the NDK but i am not able to use it, because my english is not soo
good to understand what to do.(downloading and extraction is not a problem)

i open sample projekt (that i did understand in the manual…project from existing scource…) and build the apk…
but when loading to mobile phone…it crashes…
i think i need to link anything with anything i did not know where…
maybe anything like libarys…etc…

i hope and pray i did not need the ndk and opengl2 is working with the android sdk

much greetings

and thanks for all help i may get :slight_smile:

public int createProgram() {
        	        String vertexSource =   "uniform mat4 u_mvpMatrix;"+
			        	"attribute vec4 a_position;"+
			        	"attribute vec4 a_color;"+
			        	"varying vec4 v_color;"+
			        	"void main() {"+
			        	"gl_Position = u_mvpMatrix * a_position;"+
			        	"v_color = a_color;"+

        		String fragmentSource = "precision mediump float;"+
					    		 "varying vec4 v_color;"+
					    "void main()
					    "gl_FragColor = v_color;";


	is_error_text+="loading Shader / ";
				int pixelShader = loadShader(GLES20.GL_FRAGMENT_SHADER, fragmentSource);
				if (pixelShader == 0) {
					is_error_text+=" FS error ";
					return 0;
                int vertexShader = loadShader(GLES20.GL_VERTEX_SHADER, vertexSource);
                if (vertexShader == 0) {
                	is_error_text+=" VS error ";
                    return 0;

 private int loadShader(int shaderType, String source) {
        	int shader = GLES20.glCreateShader(shaderType);
                if (shader != 0) {
                    GLES20.glShaderSource(shader, source);
                    int[] compiled = new int[1];
                    GLES20.glGetShaderiv(shader, GLES20.GL_COMPILE_STATUS, compiled, 0);
                    if (compiled[0] == 0) {
                        Log.e(TAG, "Could not compile shader " + shaderType + ":");
                        Log.e(TAG, GLES20.glGetShaderInfoLog(shader));
                        shader = 0;
                return shader;

Your fragment shader seems to be lacking a closing }. That shouldn’t cause a crash, though.

try in Eclipse:Project->Clean…

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