从相机拍摄返回Imageuri=null（但数据extras）

Question

在调试以下代码时，我发现picUri的值为null，并且在跟踪中可以看到picUri=null data:"Intent" {act=inline-data (has extras)}。为什么picUri没有相应的uri而是有数据额外项？

public void onClick(View v) {
        if (v.getId() == R.id.capture_btn) {
            try {
                // use standard intent to capture an image
                Intent captureIntent = new Intent(
                        MediaStore.ACTION_IMAGE_CAPTURE);
                // we will handle the returned data in onActivityResult
                startActivityForResult(captureIntent, CAMERA_CAPTURE);
            } catch (ActivityNotFoundException anfe) {
                Toast toast = Toast.makeText(this, "This device doesn't support the crop action!",
                        Toast.LENGTH_SHORT);
                toast.show();
            }
        }
    }

    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        if (resultCode == RESULT_OK) {
            if (requestCode == CAMERA_CAPTURE) {
                // get the Uri for the captured image
                picUri = data.getData();
                                        }
                 }
}

- djac

---

但您必须放置捕获图像的URL。 - Shweta Chauhan

Answer 1

1. Here you pass the camera Intent

   private void INTENTCAMERA() {
   Intent cameraIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
   startActivityForResult(cameraIntent, CAMERA_REQUEST);
   }
   

在此之后，我们会拍摄您的照片。

protected void onActivityResult(int requestCode, int resultCode, Intent data) {  
if (requestCode == CAMERA_REQUEST && resultCode == RESULT_OK) {
    Bitmap photo = (Bitmap) data.getExtras().get("data"); 
    imageView.setImageBitmap(photo);
    knop.setVisibility(Button.VISIBLE);


    // CALL THIS METHOD TO GET THE URI FROM THE BITMAP
    Uri tempUri = getImageUri(getApplicationContext(), photo);

    // CALL THIS METHOD TO GET THE ACTUAL PATH
    File finalFile = new File(getRealPathFromURI(tempUri));

    Log.e("ResultcapturedImage-->",mImageCaptureUri);
}  
 }

public Uri getImageUri(Context inContext, Bitmap inImage) {
ByteArrayOutputStream bytes = new ByteArrayOutputStream();
inImage.compress(Bitmap.CompressFormat.JPEG, 100, bytes);
String path = Images.Media.insertImage(inContext.getContentResolver(), 
inImage, "Title", null);
return Uri.parse(path);
}

public String getRealPathFromURI(Uri uri) {
Cursor cursor = getContentResolver().query(uri, null, null, null, null); 
cursor.moveToFirst(); 
int idx = cursor.getColumnIndex(MediaStore.Images.ImageColumns.DATA); 
return cursor.getString(idx); 
}

- Vishal Yadav

---

在一些手机上，getImageUri返回null。 - Subin Babu

你需要通过文件提供程序来实现。这可能在三星设备上无法正常工作，但在摩托罗拉设备上可以正常工作。 - Vishal Yadav

Answer 2

我已经在onactivityresult方法中接收到 Bundle 数据，并将其存储到一个file中，然后从该file获取了uri，如下所示。

    Bundle extras = data.getExtras();
    Bitmap var_Bitmap = (Bitmap) extras.get("data");
    ByteArrayOutputStream stream = new ByteArrayOutputStream();
    var_Bitmap.compress(Bitmap.CompressFormat.JPEG, 100, stream);
    byte[] bytes = stream.toByteArray();

try {

    OutputStream out;
    String root = Environment.getExternalStorageDirectory().getAbsolutePath()+"/";
    File createDir = new File(root+"macro"+File.separator);
    createDir.mkdir();


    File file = new File(root + "macro" + File.separator +"macro.jpg");

    file.createNewFile();
    out = new FileOutputStream(file);
    out.write(bytes);
    out.close();

    picUri= Uri.fromFile(file);
} catch (IOException e) {
    // e.printStackTrace();
}

- djac