来自URI的图像路径

Question

我想从图库中获取一个图像文件:

Intent intent = new Intent();
intent.setType("image/*");
intent.setAction(Intent.ACTION_GET_CONTENT);
startActivityForResult(Intent.createChooser(intent, "Select Picture"),
        GET_IMAGE_FROM_GALLERY);

消息"选择图片"未显示为Toast.

在onActivityResult();

Uri selectedImageUri = data.getData(); //log shows proper URI
String[] projection = { MediaStore.Images.Media.DATA };
Cursor cursor = getContentResolver().query(selectedImageUri,
        projection, null, null, null);
int column_index = cursor
        .getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
cursor.moveToFirst();
String selectedImagePath = cursor.getString(column_index);

cursor.getString(column_index) 返回Null.

我在Nexus 4上测试它.

编辑:

看起来这是Android 4.4的问题,我看到其他应用也失败了.

将内容:// URI转换为Android 4.4中的实际路径

Answer 1

用这个 :

String selectedImagePath = null;
Uri selectedImageUri = data.getData();
Cursor cursor = activity.getContentResolver().query(
    selectedImageUri, null, null, null, null);
if (cursor == null) { 
    selectedImagePath = selectedImageUri.getPath();
} else {
    cursor.moveToFirst();
    int idx = cursor.getColumnIndex(MediaStore.Images.ImageColumns.DATA);
    selectedImagePath = cursor.getString(idx);
}