Question

请查看此代码。它只解码图库图像而不是摄像头捕获的图像。如何在摄像头捕获图像代码中指定filePath，以便对捕获的图像进行解码并对其进行压缩，并且仅解码图库图像而不是摄像头捕获的图像。

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

    if (requestCode == GALLERY_PICTURE) {
        Uri uri = imageReturnedIntent.getData();

        if (uri != null) {
            // User had pick an image.
            Cursor cursor = getContentResolver().query(uri, new String[] { android.provider.MediaStore.Images.ImageColumns.DATA }, null, null, null);
            cursor.moveToFirst();
            final String imageFilePath = cursor.getString(0);
            File photos = new File(imageFilePath);
            yourSelectedImage = decodeFile(photos);
            yourSelectedImage = Bitmap.createScaledBitmap(yourSelectedImage, 150, 150, true);
            imageView1.setImageBitmap(yourSelectedImage);
            cursor.close();
        } else {
            Toast toast = Toast.makeText(this, "No Image is selected.", Toast.LENGTH_LONG);
            toast.show();
        }
    } else if (requestCode == CAMERA_PICTURE) {
        if (imageReturnedIntent.getExtras() != null) {
            // here is the image from camera
            yourSelectedImage = (Bitmap)  
            imageReturnedIntent.getExtras().get("data");
            imageView1.setImageBitmap(yourSelectedImage);
            deleteLastCapturedImage();
        }
    }      
}

Answer 1

您访问相机的方式图像总是会获得图像的缩略图您必须使用意图启动相机，如果可能，请使用此功能单击图像

public void takePhoto1() {
        if (!android.os.Environment.getExternalStorageState().equals(
                android.os.Environment.MEDIA_MOUNTED)) {
            Toast.makeText(Add_View_Images_Activity.this,
                    "Please insert SDcard for capturing photo.",
                    Toast.LENGTH_SHORT).show();
        } else {

            try {

                photo1=new File(fWrapper.path+"/"+System.currentTimeMillis()+".jpg");
                Intent cameraIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);              
                cameraIntent.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(photo1));
                cameraIntent.putExtra("return-data", true);

                startActivityForResult(cameraIntent, 4);
            } catch (Exception e) {
                Toast.makeText(Add_View_Images_Activity.this, ""+e, Toast.LENGTH_LONG).show();
            }
        }

    }

此功能可将图像保存在指定位置。现在，您可以从onActivityResult中文件photo1的路径获取所单击图像的路径。

像这样

String path=photo1.getAbsolutePath();

现在只需通过您正在使用此功能的路径，它一直100％工作。

 public Bitmap getImage(String path) throws IOException
        {
            BitmapFactory.Options options = new BitmapFactory.Options();
            options.inJustDecodeBounds = true;
            BitmapFactory.decodeFile(path, options);        
            int srcWidth = options.outWidth;
            int srcHeight = options.outHeight;
            int[] newWH =  new int[2];
            newWH[0] = srcWidth/2;
            newWH[1] = (newWH[0]*srcHeight)/srcWidth;

            int inSampleSize = 1;
            while(srcWidth / 2 >= newWH[0]){
                srcWidth /= 2;
                srcHeight /= 2;
                inSampleSize *= 2;
            }

            //      float desiredScale = (float) newWH[0] / srcWidth;
            // Decode with inSampleSize
            options.inJustDecodeBounds = false;
            options.inDither = false;
            options.inSampleSize = inSampleSize;
            options.inScaled = false;
            options.inPreferredConfig = Bitmap.Config.ARGB_8888;
            Bitmap sampledSrcBitmap = BitmapFactory.decodeFile(path,options);
            ExifInterface exif = new ExifInterface(path);
            String s=exif.getAttribute(ExifInterface.TAG_ORIENTATION);
            System.out.println("Orientation>>>>>>>>>>>>>>>>>>>>"+s);
            Matrix matrix = new Matrix();
            float rotation = rotationForImage(Add_View_Images_Activity.this, Uri.fromFile(new File(path)));
            if (rotation != 0f) {
                matrix.preRotate(rotation);
            }
            int newh = ( w * sampledSrcBitmap.getHeight() ) /sampledSrcBitmap.getWidth();
            Bitmap r=Bitmap.createScaledBitmap(sampledSrcBitmap, w, newh, true);
            Bitmap resizedBitmap = Bitmap.createBitmap(
                    r, 0, 0, w, newh, matrix, true);

            return resizedBitmap;
        }

我如何解码相机捕获图像？

1 个答案: