Android：如何將此圖像顯示為位圖？

Question

我正在/正在嘗試做的是。 1.拍照2.保存它3.將其加載/顯示到位圖中

打開內置相機應用程序：

public void openCamera() {
    Intent takePictureIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
    File file = new File(Environment.getExternalStorageDirectory()+ File.separator + "image.jpg");
    takePictureIntent.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(file));
    startActivityForResult(takePictureIntent, REQUEST_IMAGE_CAPTURE);
}

onActivityResult：

protected void onActivityResult(int requestCode, int resultCode, Intent data){
        //Check that request code matches ours:
        if (requestCode == REQUEST_IMAGE_CAPTURE){
            //Get our saved file into a bitmap object:
            File file = new File(Environment.getExternalStorageDirectory()+File.separator + "image.jpg");
            Bitmap image = decodeSampledBitmapFromFile(file.getAbsolutePath(), 1000, 700);
        }
    }

encodeSamoleBitmapFromFile：

public static Bitmap decodeSampledBitmapFromFile(String path, int reqWidth, int reqHeight)
    { // BEST QUALITY MATCH

        //First decode with inJustDecodeBounds=true to check dimensions
        final BitmapFactory.Options options = new BitmapFactory.Options();
        options.inJustDecodeBounds = true;
        BitmapFactory.decodeFile(path, options);

        // Calculate inSampleSize, Raw height and width of image
        final int height = options.outHeight;
        final int width = options.outWidth;
        options.inPreferredConfig = Bitmap.Config.RGB_565;
        int inSampleSize = 1;

        if (height > reqHeight)
        {
            inSampleSize = Math.round((float)height / (float)reqHeight);
        }
        int expectedWidth = width / inSampleSize;

        if (expectedWidth > reqWidth)
        {
            //if(Math.round((float)width / (float)reqWidth) > inSampleSize) // If bigger SampSize..
            inSampleSize = Math.round((float)width / (float)reqWidth);
        }

        options.inSampleSize = inSampleSize;

        // Decode bitmap with inSampleSize set
        options.inJustDecodeBounds = false;

        return BitmapFactory.decodeFile(path, options);
    }

我希望它可以將其加載到位圖中。 如果有人能指出正確的方向，那將非常有幫助！

Answer 1

為了顯示位圖，您必須使用ImageView 。 一旦有了位圖和對ImageView的引用，就可以調用ImageView.setImageBitmap(Bitmap)來顯示位圖。