CameraConfigurationManager.java 文件源码

/**
 * Reads, one time, values from the camera that are needed by the app.
 */
void initFromCameraParameters(Camera camera) {
    Camera.Parameters parameters = camera.getParameters();
    WindowManager manager = (WindowManager) context.getSystemService(Context.WINDOW_SERVICE);
    Display display = manager.getDefaultDisplay();
    int width = display.getWidth();
    int height = display.getHeight();
    // We're landscape-only, and have apparently seen issues with display thinking it's portrait
    // when waking from sleep. If it's not landscape, assume it's mistaken and reverse them:
    if (width < height) {
        Log.i(TAG, "Display reports portrait orientation; assuming this is incorrect");
        int temp = width;
        width = height;
        height = temp;
    }
    screenResolution = new Point(width, height);
    Log.i(TAG, "Screen resolution: " + screenResolution);
    cameraResolution = findBestPreviewSizeValue(parameters, screenResolution);
    Log.i(TAG, "Camera resolution: " + cameraResolution);
}