Question

我正在运行最新的Android Studio v0.8，我正在努力让Treasure Hunt Android应用程序样本在我的Note II上运行，经过一些更改，我仍然无法让应用程序工作，我也有已经导入了cardboard.jar库。演示应用程序将在我的手机上启动然后崩溃LogCat上显示的错误是这样的：

07-31 15:28:50.803  19490-19503/com.google.vrtoolkit.cardboard.samples.treasurehunt E/checkGlError﹕ onReadyToDraw: glError INVALID_ENUM
07-31 15:28:50.873  19490-19503/com.google.vrtoolkit.cardboard.samples.treasurehunt E/AndroidRuntime﹕ FATAL EXCEPTION: GLThread 713
Process: com.google.vrtoolkit.cardboard.samples.treasurehunt, PID: 19490
java.lang.RuntimeException: onReadyToDraw: glError INVALID_ENUM
        at com.google.vrtoolkit.cardboard.samples.treasurehunt.MainActivity.checkGLError(MainActivity.java:143)
        at com.google.vrtoolkit.cardboard.samples.treasurehunt.MainActivity.onNewFrame(MainActivity.java:311)
        at com.google.vrtoolkit.cardboard.CardboardView$StereoRendererHelper.onDrawFrame(CardboardView.java:1129)
        at com.google.vrtoolkit.cardboard.CardboardView$RendererHelper.onDrawFrame(CardboardView.java:968)
        at android.opengl.GLSurfaceView$GLThread.guardedRun(GLSurfaceView.java)
        at android.opengl.GLSurfaceView$GLThread.run(GLSurfaceView.java)

在MainActivity.java:143

    static final void checkGLError(String operationDescription){

    //if(Main.DEBUGGING){//only do the program-crashing thing in debug mode. In release mode, try to ride through errors. Replace my boolean with yours.
        int errorCode;
        while ((errorCode = GLES20.glGetError()) != GLES20.GL_NO_ERROR) {
            String error;
            switch(errorCode) {
                case GLES20.GL_INVALID_OPERATION:      error="INVALID_OPERATION";      break;
                case GLES20.GL_INVALID_ENUM:           error="INVALID_ENUM";           break;
                case GLES20.GL_INVALID_VALUE:          error="INVALID_VALUE";          break;
                case GLES20.GL_OUT_OF_MEMORY:          error="OUT_OF_MEMORY";          break;
                case GLES20.GL_INVALID_FRAMEBUFFER_OPERATION:  error="INVALID_FRAMEBUFFER_OPERATION";  break;
                default: error="Unknown error code";
            }
            Log.e("checkGlError", operationDescription + ": glError " + error);
            throw new RuntimeException(operationDescription + ": glError " + error);
        }

在MainActivity.java:311

 @Override
public void onNewFrame(HeadTransform headTransform) {
    GLES20.glUseProgram(mGlProgram);

    mModelViewProjectionParam = GLES20.glGetUniformLocation(mGlProgram, "u_MVP");
    mLightPosParam = GLES20.glGetUniformLocation(mGlProgram, "u_LightPos");
    mModelViewParam = GLES20.glGetUniformLocation(mGlProgram, "u_MVMatrix");
    mModelParam = GLES20.glGetUniformLocation(mGlProgram, "u_Model");
    mIsFloorParam = GLES20.glGetUniformLocation(mGlProgram, "u_IsFloor");

    // Build the Model part of the ModelView matrix.
    Matrix.rotateM(mModelCube, 0, TIME_DELTA, 0.5f, 0.5f, 1.0f);

    // Build the camera matrix and apply it to the ModelView.
    Matrix.setLookAtM(mCamera, 0, 0.0f, 0.0f, CAMERA_Z, 0.0f, 0.0f, 0.0f, 0.0f, 1.0f, 0.0f);

    headTransform.getHeadView(mHeadView, 0);

    checkGLError("onReadyToDraw");
}

我所做的更改是在build.gradle

android {
compileSdkVersion 19
buildToolsVersion '19.1.0' -----> previously '19.0.3'

dependencies {
compile fileTree(dir: 'libs', include: ['*.jar'])
compile 'com.android.support:support-v4:20.0.0' -----> previously compile 'com.android.support:support-v4:+'

错误似乎来自：

案例GLES20.GL_INVALID_ENUM：error =“INVALID_ENUM”;

我错过了什么吗？这个错误意味着什么？

Answer 1

GL_INVALID_ENUM表示传递给其中一个方法的枚举值无效。

以glDrawElements方法为例。

该方法的第一个参数应该是枚举。如果传入除列出的符号常量之外的任何符号常量，则会出现此错误。

某些常量仅在特定版本中可用。

在我过去，这样的错误是由于指定构建始终使用任何依赖项的“最新”版本，解决方案是找出最后一个工作版本并将其锁定在构建文件中。升级是一项刻意的努力，有助于保护您免受前沿库中未知错误的影响。

麻烦运行Cardboard Treasure Hunt样本

1 个答案: