在 android 中,ImageView 未显示使用相机捕获的图像

ImageView is not showing captured Image using Camera in android

我正在尝试选择一张图片进行注册。单击 ImageView 时,用户可以选择拍照还是从 his/her 图库中选择。当用户选择图库选项时,它将显示所选图像。当用户选择相机选项时,ImageView 不显示图像。下面是我的 OnActivityResult

代码
protected void onActivityResult(int requestCode, int resultCode, Intent imgdata) {
        super.onActivityResult(requestCode, resultCode, imgdata);
        if (requestCode == SELECT_IMAGE && resultCode == RESULT_OK && imgdata != null) {
            selectedimage = imgdata.getData();
            try {
                InputStream inputStream = getContentResolver().openInputStream(selectedimage);
                Bitmap yourselectedimage = BitmapFactory.decodeStream(inputStream);
                imgchild.setImageBitmap(yourselectedimage);

            } catch (Exception e) {
                e.printStackTrace();
                Toast.makeText(getApplicationContext(), "Hello", Toast.LENGTH_SHORT).show();
            }
        }
        if (requestCode == CAPTURE_IMAGE && resultCode == RESULT_OK && imgdata != null) {
            camImg =(Bitmap) imgdata.getExtras().get("img");
            try {
                imgchild.setImageBitmap(camImg);

            } catch (Exception e) {
                e.printStackTrace();
                Toast.makeText(getApplicationContext(), "Hello", Toast.LENGTH_SHORT).show();
            }
        }
    }

ImageView 应该显示从相机拍摄的照片。

通过阅读您的代码,我认为 camImg 很可能为空,因为您从 Intent 中提取位图的方式不正确。

Bitmap实现了Parcelable,所以需要这样解压:

camImg = (Bitmap) imgdata.getParcelableExtra("img");

我觉得应该是这样的

    Bitmap imageBitmap = (Bitmap) extras.get("data");
    mImageView.setImageBitmap(imageBitmap);

我希望这对你有用。

像这样设置图像

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


   // CALL THIS METHOD TO GET THE ACTUAL PATH
   Uri tempUri = getImageUri(getApplicationContext(), photo);
   File finalFile = new File(getRealPathFromURI(tempUri));
   Log.e("path", finalFile.getAbsolutePath());

获取图片存放路径

 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);
        }

我遇到了与 Android Marshmallow 相同的问题,在我的例子中,这是由于位图较大而发生的,所以我通过调整位图的大小来解决以下代码

    final int maxSize = 960;
    int outWidth;
    int outHeight;
    int inWidth = CameraActivity.bitmap.getWidth();
    int inHeight = CameraActivity.bitmap.getHeight();
    if(inWidth > inHeight){
        outWidth = maxSize;
        outHeight = (inHeight * maxSize) / inWidth;
    } else {
        outHeight = maxSize;
        outWidth = (inWidth * maxSize) / inHeight;
    }
        iv_captured_image.setImageBitmap(Bitmap.createScaledBitmap(CameraActivity.bitmap, outWidth, outHeight, false));