在相机活动中将图像从drawable保存到sdcard

Posted 2023-05-07

【中文标题】在相机活动中将图像从drawable保存到sdcard

【英文标题】：Save Image from drawable to sdcard in camera activity

【发布时间】：2012-04-17 20:27:46

【问题描述】：

我正在做一个项目，通过ImageView从drawable文件夹中读取图像文件，它通过成功加载

ImageView view = (ImageView) findViewById(R.id.imageView);
view.setOnTouchListener(this);
buttonTakePicture = (Button) findViewById(R.id.takepicture);
buttonTakePicture.setOnClickListener(new Button.OnClickListener() 
    @Override
    public void onClick(View arg0) 
        // TODO Auto-generated method stub
        camera.takePicture(myShutterCallback, myPictureCallback_RAW,
            myPictureCallback_JPG);

现在按下takePicture按钮后，图像应该保存在sdcard中，它正在拍摄快照但不保存图像，代码如下

File file = new File(mScreenshotPath + "/" + System.currentTimeMillis() + ".jpg");
FileOutputStream fos;
try 
    imageFileOS = getContentResolver().openOutputStream(uriTarget);
    imageFileOS.write(arg0);
    imageFileOS.flush();
    imageFileOS.close();
    fos = new FileOutputStream(file);
    bitmap.compress(Bitmap.CompressFormat.JPEG, 100, fos);
    fos.close();
    Toast.makeText(androidCamera.this,
            "Image saved: " + uriTarget.toString(),
            Toast.LENGTH_LONG).show();

请帮我解决这个问题....在此先感谢

【参考方案1】：

您可以在 Android 中保存照片，而无需 OutputStream 和所有其他逻辑。这是一个简单的食谱，可以完成我认为您正在尝试完成的事情。请特别注意 Intent 以及如何使用它来设置图像的保存，因为我认为这是您出错的地方。

public class PhotoActivity extends Activity implements OnClickListener 

private Button takePicture;
private String path;
private File imageFile;

@Override
protected void onCreate(Bundle savedInstanceState) 
    super.onCreate(savedInstanceState);
    setContentView(R.layout.your_layout);
    takePicture = (Button) findViewById(R.id.button1);
    takePicture.setOnClickListener(this);

    path = Environment.getExternalStorageDirectory() + "/my_image.png";
    imageFile = new File(path);


@Override
public void onClick(View v) 
    switch (v.getId()) 
    case R.id.button1:
        Intent i = new Intent(MediaStore.ACTION_IMAGE_CAPTURE); 
        Uri uri = Uri.fromFile(imageFile);
        i.putExtra(MediaStore.EXTRA_OUTPUT, uri);

        startActivity(i);
        break;
    

【讨论】：

非常有帮助和有用的答案。

【参考方案2】：

  private static final int CAMERA_REQUEST = 1888;  
    buttonTakePicture.setOnClickListener(new Button.OnClickListener() 
                @Override
                public void onClick(View arg0) 
    Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);

    intent.putExtra(MediaStore.EXTRA_OUTPUT, getImageUri());

    startActivityForResult(intent, CAMERA_REQUEST);

                    

            );

    @Override
        protected void onActivityResult(int requestCode, int resultCode, Intent data) 
            super.onActivityResult(requestCode, resultCode, data);

            if (requestCode == CAMERA_REQUEST) 

                    photo = (Bitmap) data.getExtras().get("data");



                
    

    private Uri getImageUri() 


            File file1 = new File(Environment.getExternalStorageDirectory() + "/Camerafolder");
            if (!file1.exists())
            
                file1.mkdirs();
            

            File file = new File(Environment.getExternalStorageDirectory() + "/Camerafolder/"+"img"+".png");

    Uri imgUri = Uri.fromFile(file);

            return imgUri;