android - 使用 Android 上的应用程序编写相机

Question

我是 android 编程新手，但尝试了几种使用相机应用程序的方法。

我希望每 5 分钟拍摄一张照片并将其发送到我的服务器，但我尝试过的每种方法最终都会为我提供一个应用程序，该应用程序为我提供了内置的相机应用程序，希望我按下快门。我需要这个自动化

Cordova 中的“包装器”就是这样做的。android 开发者页面上的示例就是这样做的，当我阅读 Android 编程书籍时，我怀疑相机 pp 示例也会这样做。

Answer 1

//somewhere in your code call this (Maybe you need to set up a timer):
mCamera.takePicture(null, null, mCall); 

//this should be done before using camera
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;
    }
}

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

   // you need to change this method due to your needs
   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());
              }

   }
};