android - 如何在没有用户界面的情况下在 android 应用程序中拍照..？

Question

我必须设计一个应用程序，该应用程序必须从相机拍摄照片，而不在布局中显示，也没有任何用户界面（如单击按钮......）并存储图片？

Answer 1

Camera mCamera; 
private boolean safeCameraOpen(int id) {
boolean qOpened = false;

    try {
        releaseCamera();
        mCamera = Camera.open(id);
        qOpened = (mCamera != null);
    } catch (Exception e) {
        Log.e(getString(R.string.app_name), "failed to open Camera");
        e.printStackTrace();
    }

    return qOpened;    
}

private void releaseCamera() {
    if (mCamera != null) {
        mCamera.release();
        mCamera = null;
    }
}

//somewhere in your code call this:
mCamera.takePicture(null, null, mCall);


Camera.PictureCallback mCall = new Camera.PictureCallback() {

   public void onPictureTaken(byte[] data, Camera camera) {
         //decode the data obtained by the camera into a Bitmap

         FileOutputStream outStream = null;
              try {
                  outStream = new FileOutputStream("/sdcard/Image.jpg");
                  outStream.write(data);
                  outStream.close();
              } catch (FileNotFoundException e){
                  Log.d("CAMERA", e.getMessage());
              } catch (IOException e){
                  Log.d("CAMERA", e.getMessage());
              }

   }
};