在onPause期间，Opengl es2.0崩溃-Java 学习之路

出于某种原因，在我的android程序中调用onPause时，Opengl会崩溃 . （无论是通过旋转还是后退按钮/主页按钮被按下 . ）我已经做了一堆调试，并确定问题的原因与着色器没有被卸载有关 . 但是，我尝试手动卸载它们仍然会崩溃 . 这是我的程序的精简版本，可用于重新创建错误 . 任何解决这个问题的帮助表示赞赏 .

public class MainActivity extends Activity implements GLSurfaceView.Renderer {
private int program;
private int vertexShader;
private int fragmentShader;
private int texture;
private GLSurfaceView glView;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    glView= new GLSurfaceView(this);
    glView.setEGLContextClientVersion(2);
    glView.setEGLConfigChooser(8, 8, 8, 8, 16, 0);
    glView.setRenderer(this);
    setContentView(glView);
}

@Override
protected void onPause() {
    super.onPause();
    glView.onPause();
}

@Override
protected void onResume() {
    super.onResume();
    glView.onResume();
}

@Override
public void onSurfaceCreated(GL10 gl, EGLConfig config) {
    GLES20.glClearColor(0, 0, 0, 1);
    String VertexShaderSource=...//See vertex shader code

    String FragmentShaderSource=...//See fragment shader code

    //Compile vertex shader.
    vertexShader= GLES20.glCreateShader(GLES20.GL_VERTEX_SHADER);
    GLES20.glShaderSource(vertexShader,VertexShaderSource);
    GLES20.glCompileShader(vertexShader);
    String vCompileLog=GLES20.glGetShaderInfoLog(vertexShader);

    //Compile fragment shader.
    fragmentShader=GLES20.glCreateShader(GLES20.GL_FRAGMENT_SHADER);
    GLES20.glShaderSource(fragmentShader,FragmentShaderSource);
    GLES20.glCompileShader(fragmentShader);
    String fCompileLog=GLES20.glGetShaderInfoLog(fragmentShader);

    //Link shaders
    program=GLES20.glCreateProgram();
    GLES20.glAttachShader(program,vertexShader);
    GLES20.glAttachShader(program,fragmentShader);
    GLES20.glBindAttribLocation(program, 0, "position");
    GLES20.glBindAttribLocation(program,1,"textureCoordinate");
    GLES20.glLinkProgram(program);
    String programLinkLog=GLES20.glGetProgramInfoLog(program);
    GLES20.glUseProgram(program);

    //Enable textures, and load a texture to memory.
    GLES20.glEnable(GLES20.GL_TEXTURE_2D);
    Bitmap bmptexture= BitmapFactory.decodeResource(getResources(), R.drawable.texture);  //Load the bitma
    IntBuffer textureID=IntBuffer.allocate(1);                                          //Create a textureID buffer.
    GLES20.glGenTextures(1,textureID);                                                  //Generate an Id for the texture.
    texture=textureID.get(0);
    GLES20.glBindTexture(GLES20.GL_TEXTURE_2D,textureID.get(0));
    GLES20.glTexParameteri(GLES20.GL_TEXTURE_2D,GLES20.GL_TEXTURE_MAG_FILTER,GLES20.GL_LINEAR);
    GLES20.glTexParameteri(GLES20.GL_TEXTURE_2D,GLES20.GL_TEXTURE_MIN_FILTER,GLES20.GL_LINEAR);
    GLUtils.texImage2D(GLES20.GL_TEXTURE_2D, 0, bmptexture, 0);
}

@Override
public void onSurfaceChanged(GL10 gl, int width, int height) { 
    //..Note that setting up the glviewport here doesn't solve the problem.
}

@Override
public void onDrawFrame(GL10 gl) {
    //see onDraw code
}
}

片段着色器：

FragmentShaderSource="" +
            "uniform sampler2D textureUnit;"+
            "varying highp vec2 textureCoordinateVarying;"+
            "void main()"+
            "{"+
            "vec4 color=texture2D(textureUnit,textureCoordinateVarying);"+
            "gl_FragColor=color;"+
            "}";

顶点着色器：

VertexShaderSource=""+
            "uniform vec3 translate;"+
            "attribute vec4 position;"+
            "attribute vec2 textureCoordinate;"+
            "varying vec2 textureCoordinateVarying;"+
            "void main()"+
            "{"+
            "     gl_Position= position + vec4(translate.x,translate.y,translate.z,0.0);"+
            "     textureCoordinateVarying=textureCoordinate;"+
            "}";

onDraw代码：

GLES20.glClear(GLES20.GL_COLOR_BUFFER_BIT);
    float destPoints[]={
            0,0,0,1.0f,
            0,1,0,1.0f,
            1,0,0,1.0f,
            1,0,0,1.0f,
            0,1,0,1.0f,
            1,1,0,1.0f,
    };
    float srcPoints[]={
            0,0,
            0,1,
            1,0,
            1,0,
            0,1,
            1,1,
    };
    ByteBuffer BBDestBuffer=ByteBuffer.allocateDirect(destPoints.length*4);
    ByteBuffer BBSrcBuffer=ByteBuffer.allocateDirect(srcPoints.length*4);
    FloatBuffer vDestBuffer;
    FloatBuffer vSrcBuffer;

    BBDestBuffer.order(ByteOrder.nativeOrder());
    BBSrcBuffer.order(ByteOrder.nativeOrder());
    vDestBuffer=BBDestBuffer.asFloatBuffer();
    vSrcBuffer=BBSrcBuffer.asFloatBuffer();

    int TranslateDrawingLocation=GLES20.glGetUniformLocation(program,"translate");
    GLES20.glUniform3f(TranslateDrawingLocation, 0, 0, 0);

    int TranslateTextureLocation=GLES20.glGetUniformLocation(program,"textureUnit");
    GLES20.glUniform1i(TranslateTextureLocation,0);

    vDestBuffer.put(destPoints);
    vDestBuffer.position(0);
    vSrcBuffer.put(srcPoints);
    vSrcBuffer.position(0);

    GLES20.glEnableVertexAttribArray(0);
    GLES20.glVertexAttribPointer(0, 4, GLES20.GL_FLOAT, false, 4 * 4, vDestBuffer);
    GLES20.glEnableVertexAttribArray(1);
    GLES20.glVertexAttribPointer(1, 2, GLES20.GL_FLOAT, false, 4 * 2, vSrcBuffer);
    GLES20.glDrawArrays(GLES20.GL_TRIANGLES,0,6 );

Below is the logcat log (Without the GLES memory dump):

11-26 02：54：03.373 280-417 / system_process W / ActivityManager：强制删除ActivityRecord {40e7a8a0 u0 com.tests.simpleegl2 / .MainActivity}：app死了，没有保存状态

11-26 02：54：03.401 280-909 / system_process I / WindowState：WIN DEATH：Window {4138cb70 u0 com.tests.simpleegl2 / com.tests.simpleegl2.MainActivity}

11-26 02：54：03.401 280-909 / system_process W / WindowManager：从容器窗口强制删除子窗口{40f67860 u0 SurfaceView} {4138cb70 u0 com.tests.simpleegl2 / com.tests.simpleegl2.MainActivity}

11-26 02：54：03.421 280-312 / system_process E / InputDispatcher：接收未知输入通道的杂散接收回调 . fd = 204，事件= 0x9

11-26 02：54：03.441 280-481 / system_process W / WindowManager：查找窗口失败java.lang.IllegalArgumentException：请求窗口android.os.BinderProxy@40ebb0e8在com.android.server.wm.WindowManagerService中不存在 . window.ClientLocked（WindowManagerService.java:8102）com.android.server.wm.WindowManagerService.windowForClientLocked（WindowManagerService.java:8093）at com.android.server.wm.WindowState $ DeathRecipient.binderDied（WindowState.java:932）at android dosvik.system.NativeStart.run中的.os.BinderProxy.sendDeathNotice（Binder.java:433）（本机方法）

11-26 02：54：03.441 280-481 / system_process I / WindowState：WIN DEATH：null

编辑：奇怪的是，在顶点着色器中将 varying vec2 textureCoordinateVarying; 更改为 varying highp vec2 textureCoordinateVarying; 似乎已经解决了这个问题 . **至少在我的手机上，模拟器仍然崩溃 . 放弃模拟器，因为它毫无 Value .

在onPause期间，Opengl es2.0崩溃

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