Display black screen while capture screenshot of GLSurfaceView

Question

I am wandering for seven hours for solving my issue. I have created project in which i m using GLSurfaceView on which i have set one image and afte

Answer 1

try this...

private volatile boolean saveFrame;

// called when Capture button is clicked.
public void onClick(View view) {
    saveFrame = true;
    mEffectView.requestRender();
}

@Override
public void onDrawFrame(GL10 gl) {
    if (!mInitialized) {
        // Only need to do this once
        mEffectContext = EffectContext.createWithCurrentGlContext();
        mTexRenderer.init();
        loadTextures();
        mInitialized = true;
    }
    if (mCurrentEffect != NONE) {
        // if an effect is chosen initialize it and apply it to the texture
        initEffect();
        applyEffect();
    }
    renderResult();
    if (saveFrame) {
        saveBitmap(takeScreenshot(gl));
        saveFrame = false;
    }
}

private void saveBitmap(Bitmap bitmap) {
    try {
        FileOutputStream stream = openFileOutput("image.png", MODE_PRIVATE);
        bitmap.compress(CompressFormat.PNG, 100, stream);
        stream.flush();
        stream.close();
        Log.i("TAG", "SAVED");
    } catch (Exception e) {
        Log.e("TAG", e.toString(), e);
    }
}

public Bitmap takeScreenshot(GL10 mGL) {
    final int mWidth = mEffectView.getWidth();
    final int mHeight = mEffectView.getHeight();
    IntBuffer ib = IntBuffer.allocate(mWidth * mHeight);
    IntBuffer ibt = IntBuffer.allocate(mWidth * mHeight);
    mGL.glReadPixels(0, 0, mWidth, mHeight, GL10.GL_RGBA, GL10.GL_UNSIGNED_BYTE, ib);

    // Convert upside down mirror-reversed image to right-side up normal image.
    for (int i = 0; i < mHeight; i++) {
        for (int j = 0; j < mWidth; j++) {
            ibt.put((mHeight - i - 1) * mWidth + j, ib.get(i * mWidth + j));
        }
    }

    Bitmap mBitmap = Bitmap.createBitmap(mWidth, mHeight,Bitmap.Config.ARGB_8888);
    mBitmap.copyPixelsFromBuffer(ibt);
    return mBitmap;
}