从图库或照片中删除图片 android 8.0

Question

我想根据其 URI 从设备中删除图库或照片应用程序中的图片。我在互联网上尝试了几种方法，但没有找到。我调用了下面的方法deleteMethod(getPath(selectedImageUri));这两个方法定义在这里。private void deleteMethod(String file_dj_path) {    File fdelete = new File(file_dj_path);    if (fdelete.exists()) {        if (fdelete.delete()) {            System.out.println("file Deleted :" + file_dj_path);            Toast.makeText(getApplicationContext(),                    "file Deleted", Toast.LENGTH_SHORT).show();        } else {            Toast.makeText(getApplicationContext(),                    "file not Deleted", Toast.LENGTH_SHORT).show();            System.out.println("file not Deleted :" + file_dj_path);        }    }}public String getPath(Uri uri) {    String[] projection = {MediaStore.Images.Media.DATA};    Cursor cursor = managedQuery(uri, projection, null, null, null);    if (cursor != null) {        //HERE YOU WILL GET A NULLPOINTER IF CURSOR IS NULL        //THIS CAN BE, IF YOU USED OI FILE MANAGER FOR PICKING THE MEDIA        int column_index = cursor                .getColumnIndexOrThrow(MediaStore.Images.Media.DATA);        cursor.moveToFirst();        return cursor.getString(column_index);    } else return null;}我在清单中添加权限。像，    <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" /><uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />我的提供者看起来像：    <paths xmlns:android="http://schemas.android.com/apk/res/android">    <external-path path="Android/data/com.***.calculator/"        name="files_root" />    <external-path path="." name="external_storage_root" /></paths>我有这样的uri：:/storage/emulated/0/DCIM/Camera/IMG_20180804_181447.jpg我错过了什么吗？

Answer 1

改成这样

 String path = selectedImageUri.getPath() 

 deleteMethod(path);

然后里面的delete方法

File file = new File(new URI(path));

if (fdelete.exists()) {

if (fdelete.delete()) {

    System.out.println("file Deleted :" + uri.getPath());

} else {

    System.out.println("file not Deleted :" + uri.getPath());

}

 }