file.delete返回true，但是文件未删除

问题描述

我将文件从URL下载到外部存储，然后将数据复制到内部存储，然后需要从外部存储中删除文件，我的复制方法如下：

public static void copyDataBase(String databaseName,String ExternalDatabaseName) throws IOException {

        String DB_NAME = databaseName;
        String NEW_DB_NAME = DB_NAME.replace("-","_");
        String DB_PATH = MyApplication.getAppContext().getDatabasePath(NEW_DB_NAME).getPath();
        Log.d("pathx","path: " + DB_PATH);

        // Open your local db as the input stream
        String fileName = ExternalDatabaseName;
        String newFileName = fileName.replace("_","-");
        //String path = Environment.DIRECTORY_DOWNLOADS+"/"+fileName;
        File file = new File(Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOWNLOADS),fileName);
        FileInputStream inputStream = new FileInputStream(file);

        // Path to the just created empty db
        String outFileName = DB_PATH;

        // Open the empty db as the output stream
        OutputStream myOutput = new FileOutputStream(outFileName);

        // transfer bytes from the input file to the output file
        byte[] buffer = new byte[1024];
        int length;
        while ((length = inputStream.read(buffer)) > 0) {
            myOutput.write(buffer,length);
        }

        // Close the streams
        myOutput.flush();
        myOutput.close();
        inputStream.close();

        if(ContextCompat.checkSelfPermission(MyApplication.getAppContext(),Manifest.permission.WRITE_EXTERNAL_STORAGE) == PackageManager.PERMISSION_GRANTED) {
            boolean deleted = file.delete();
        }
    }

如您所见，在复制后，我尝试使用相同的路径删除相同的文件，但是即使已删除的布尔值返回true，也不会从设备中删除该文件，而是下载文件。

解决方法

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