请检查和解释以下代码@Override @SuppressLint("SetTextI18n") protected void onActivityResult(int requestCode, int resultCode, @Nullable Intent data) { super.onActivityResult(requestCode, resultCode, data); ImageView img_result=(ImageView) findViewById(R.id.pic); switch (requestCode) { case TAKE_PHOTO: if (resultCode == RESULT_OK) { //将图片解析成Bitmap对象，并把它显现出来 //String filePath = getFilesDir().getAbsolutePath()+"/image.jpeg"; //bitmap = BitmapFactory.decodeFile(filePath); //注意bitmap，后面再decode就会为空 try { bitmap = BitmapFactory.decodeStream(getContentResolver().openInputStream(imageUri)); } catch (FileNotFoundException e) { e.printStackTrace(); } //bitmap = BitmapFactory.decodeFile(picpath); picpath=imageUri.getPath().toString(); Log.e("", imageUri.getAuthority()); Log.e("picpath",picpath); @SuppressLint("SdCardPath") String fileName = picpath; img_result.setImageBitmap(bitmap); img_result.invalidate(); } break; case SCAN_OPEN_PHONE: if (resultCode == RESULT_OK){ Uri selectImage=data.getData(); String[] FilePathColumn={MediaStore.Images.Media.DATA}; Cursor cursor = getContentResolver().query(selectImage, FilePathColumn, null, null, null); cursor.moveToFirst(); //从数据视图中获取已选择图片的路径 int columnIndex = cursor.getColumnIndex(FilePathColumn[0]); picpath = cursor.getString(columnIndex); Log.e("picpath",picpath); cursor.close(); bitmap = BitmapFactory.decodeFile(picpath); img_result.setImageBitmap(bitmap); img_result.invalidate(); } break; default: break; } //处理图像数据,以上传到mysql ByteArrayOutputStream baos = new ByteArrayOutputStream(); bitmap.compress(Bitmap.CompressFormat.JPEG, 100, baos); piccjg = baos.toByteArray(); }