Question

以前我使用过SurfaceView，可以通过以下方法使其透明化。我现在不使用SurfaceView。不要将其标记为重复。我知道如何使SurfaceView透明，现在我正在尝试将我的代码从SurfaceView迁移到GLSurfaceView。为了使屏幕透明，我尝试了以下方法：

    public void clear() {
    Constants.debugLog(TAG,"clear method called ");
    Canvas canvas = null;
    try {
        canvas = getHolder().lockCanvas();
        canvas.drawColor(Color.TRANSPARENT);
    } catch (Exception e) {
        Constants.debugLog(TAG,"clear() 1st try  "+e.toString());
    } finally {
        try {
            if (canvas != null) {
                getHolder().unlockCanvasAndPost(canvas);
            }
        } catch (Exception e) {
            Constants.debugLog(TAG,"clear() 2nd try "+e.toString());
        }

    }
}

但它不适用于我的自定义GLSurfaceView。由于GLSurfaceView是SurfaceView的子类，因此它应该可以解决这个问题。抛出以下异常

Exception locking surface
                                                                java.lang.IllegalArgumentException
                                                                    at android.view.Surface.nativeLockCanvas(Native Method)
                                                                    at android.view.Surface.lockCanvas(Surface.java:275)
                                                                    at android.view.SurfaceView$4.internalLockCanvas(SurfaceView.java:823)
                                                                    at android.view.SurfaceView$4.lockCanvas(SurfaceView.java:791)
                                                                    at com.ringid.voicecall.video.VideoCallImageRenderView.clear(VideoCallImageRenderView.java:77)
                                                                    at com.ringid.voicecall.OutgoingRingCallScreen.stopOwnVideoCall(OutgoingRingCallScreen.java:988)
                                                                    at com.ringid.voicecall.OutgoingRingCallScreen.decideStart_or_stop_Video(OutgoingRingCallScreen.java:1090)
                                                                    at com.ringid.voicecall.OutgoingRingCallScreen.onClick(OutgoingRingCallScreen.java:882)
                                                                    at android.view.View.performClick(View.java:4856)

对这个问题的任何想法对我都有帮助。目前我正从相机在GLSurfaceView上绘制图像。当我停止相机并使GLSurfaceView的可见性为GONE时，它仍然显示屏幕上的最后一帧。所以我需要做那个透明的

使透明的GLSurfaceView无法按预期工作

0 个答案: