CameraWrapper.java 文件源码

private void initCamera() {
    if (this.mCamera != null) {
        this.mCameraParamters = this.mCamera.getParameters();
        this.mCameraParamters.setPreviewFormat(ImageFormat.NV21);
        this.mCameraParamters.setFlashMode("off");
        this.mCameraParamters.setWhiteBalance(Camera.Parameters.WHITE_BALANCE_AUTO);
        this.mCameraParamters.setSceneMode(Camera.Parameters.SCENE_MODE_AUTO);
        Point p = MyApplication.getBestCameraResolution(this.mCameraParamters, MyApplication.getScreenMetrics());
        IMAGE_WIDTH = p.x;
        IMAGE_HEIGHT = p.y;
        this.mCameraParamters.setPreviewSize(IMAGE_WIDTH, IMAGE_HEIGHT);
        mCameraPreviewCallback = new CameraPreviewCallback();
        byte[] a = new byte[IMAGE_WIDTH * IMAGE_HEIGHT * 3 / 2];
        byte[] b = new byte[IMAGE_WIDTH * IMAGE_HEIGHT * 3 / 2];
        byte[] c = new byte[IMAGE_WIDTH * IMAGE_HEIGHT * 3 / 2];
        mCamera.addCallbackBuffer(a);
        mCamera.addCallbackBuffer(b);
        mCamera.addCallbackBuffer(c);
        mCamera.setPreviewCallbackWithBuffer(mCameraPreviewCallback);
        List<String> focusModes = this.mCameraParamters.getSupportedFocusModes();
        if (focusModes.contains("continuous-video")) {
            this.mCameraParamters
                    .setFocusMode(Camera.Parameters.FOCUS_MODE_CONTINUOUS_VIDEO);
        }
        this.mCamera.setParameters(this.mCameraParamters);
        this.mCamera.startPreview();

        this.mIsPreviewing = true;
    }
}