从图库中捕获或拍摄图像会在Android 5.1中产生空指针异常？

Question

我想拍摄照片并从SD卡中选择图像，但是当我从SD卡中选择图像时，它会在5.1操作系统中崩溃，在其他操作系统中工作正常

public String getImagePath(Uri uri) {
        Cursor cursor = getContentResolver().query(uri, null, null, null, null);
        cursor.moveToFirst();
        String document_id = cursor.getString(0);
        document_id = document_id.substring(document_id.lastIndexOf(":") + 1);
        cursor.close();

        cursor = getContentResolver().query(
                MediaStore.Images.Media.EXTERNAL_CONTENT_URI,
                null, MediaStore.Images.Media._ID + " = ? ", new String[]{document_id}, null);
        cursor.moveToFirst();
        String path = cursor.getString(cursor.getColumnIndex(MediaStore.Images.Media.DATA));
        cursor.close();

        return path;
    }



// Error Coming in this line
String path = cursor.getString(cursor.getColumnIndex(MediaStore.Images.Media.DATA));

Answer 1

请尝试以下方法获取路径：

public String getImagePath(Uri uri) {
    String[] projection = {MediaStore.Images.Media.DATA};
    Cursor cursor = getContentResolver().query(uri,
            projection, null, null, null);
    int column_index = cursor.getColumnIndexOrThrow(projection[0]);
    cursor.moveToFirst();
    return cursor.getString(column_index);
}