从从图库或相机中选取的图像中获取文件扩展名，作为字符串
从从图库或相机中选取的图像中获取文件扩展名，作为字符串
提问于 2012-03-18 20:05:42
我想以字符串形式获取图像扩展名(例如"jpg“、"png”、"bmp“ecc)。从图库中加载或从相机中拾取的图像。
我已经使用此表单中的方法从库中加载图像
private static final int SELECT_PICTURE_ACTIVITY_REQUEST_CODE = 0;
....
private void selectPicture() {
Intent intent = new Intent(Intent.ACTION_PICK);
intent.setType("image/*");
startActivityForResult(intent, SELECT_PICTURE_ACTIVITY_REQUEST_CODE);
}
....
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent imageReturnedIntent) {
super.onActivityResult(requestCode, resultCode, imageReturnedIntent);
switch (requestCode) {
case SELECT_PICTURE_ACTIVITY_REQUEST_CODE:
if (resultCode == RESULT_OK) {
Uri selectedImage = imageReturnedIntent.getData();
String[] filePathColumn = {MediaStore.Images.Media.DATA};
Cursor cursor = getContentResolver().query(selectedImage, filePathColumn, null, null, null);
if (cursor.moveToFirst()) {
int columnIndex = cursor.getColumnIndex(filePathColumn[0]);
String filePath = cursor.getString(columnIndex);
Bitmap bitmap = BitmapFactory.decodeFile(filePath);
.........
}
cursor.close();
}
break;
}
}Stack Overflow用户
发布于 2012-03-18 20:18:45
我认为这应该会让你达到你想要的地方(我还没有尝试过，只是阅读了一下，我认为它是有效的)。
Uri selectedImage = imageReturnedIntent.getData();
String[] filePathColumn = {MediaStore.Images.Media.DATA,
MediaStore.Images.Media.DISPLAY_NAME};
Cursor cursor =
getContentResolver().query(selectedImage, filePathColumn, null, null, null);
if (cursor.moveToFirst()) {
int columnIndex = cursor.getColumnIndex(filePathColumn[0]);
String filePath = cursor.getString(columnIndex);
Bitmap bitmap = BitmapFactory.decodeFile(filePath);
int fileNameIndex = cursor.getColumnIndex(filePathColumn[1]);
String fileName = cursor.getString(fileNameIndex);
// Here we get the extension you want
String extension = fileName.replaceAll("^.*\\.", "");
.........
}
cursor.close();页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/9758151
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