使用 URI 从 Android 中的外部存储打开文件

如何解决使用 URI 从 Android 中的外部存储打开文件

我的代码进入内部存储并选择一个 excel 文件并将 excel 数据上传到应用程序的 sqlite 数据库但我在打开文件时出错，我使用 FileInputStream() 从路径字符串打开文件命名 FilePath 但我收到错误消息，我的文件路径中没有这样的文件或目录，任何人都可以帮助我

            @Override
            public void onClick(View v) {
                AlertDialog.Builder alertDialog = new AlertDialog.Builder(add_number.this);
                alertDialog.setTitle("Confirm Import...");
                alertDialog.setMessage("Are you sure you want to Import Data?");
                alertDialog.setPositiveButton("Yes",new DialogInterface.OnClickListener(){


                    @Override
                    public void onClick(DialogInterface dialog,int which) {
                        Intent fileIntent = new Intent(Intent.ACTION_GET_CONTENT);
                        fileIntent.setType("*/*");

                        try {
                            startActivityForResult(fileIntent,requestcode);
                        }
                        catch (ActivityNotFoundException e){
                            lbl.setText("No activity can handle picking a file. Showing alternatives.");
                        }
                    }
                });
                alertDialog.setNegativeButton("Cancel",new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialog,int which) {
                        Toast.makeText(getApplicationContext(),"Import Canceled",Toast.LENGTH_SHORT ).show();
                    }
                });
                alertDialog.show();

            }
        });


    }

    protected void onActivityResult(int requestCode,int resultCode,Intent data) {
        super.onActivityResult(requestCode,resultCode,data);
        if (data == null)
            return;
        switch (requestCode) {
            case requestcode:
                String FilePath = data.getData().getPath();

                Log.e("File path",FilePath);

                if (FilePath.contains("/root_path"))
                    FilePath = FilePath.replace("/root_path","");

                Log.e("New File path",FilePath);

                try {
                    if (resultCode == RESULT_OK) {
                        AssetManager as = getAssets();

                        InputStream inStream =new FileInputStream(new File(FilePath));
                        Toast.makeText(this,"hellow",Toast.LENGTH_SHORT).show();
                        Workbook wb = null;


                        try {
                            Log.e("Extension",FilePath.substring(FilePath.lastIndexOf(".")));

                            if (FilePath.substring(FilePath.lastIndexOf(".")).equals(".xls")) {
                                Log.e("File Type","Selected file is XLS");
                                wb = new hssfWorkbook(inStream);
                            }
                            else if (FilePath.substring(FilePath.lastIndexOf(".")).equals(".xlsx")) {
                                Log.e("File Type","Selected file is XLSX");
                                wb = new XSSFWorkbook(inStream);
                            }
                            else {
                                wb = null;
                                lbl.setText("Please select a valid Excel file");
                                return;

                            }

                            inStream.close();
                        } catch (IOException e) {
                            lbl.setText("First " + e.getMessage().toString());
                            e.printstacktrace();
                        }

                        DatabasesqliteHelper dbAdapter = new DatabasesqliteHelper(this);
                        Sheet sheet1 = wb.getSheetAt(0);


                        insertExcelTosqlite(dbAdapter,sheet1);

                        dbAdapter.close();

                    }
                } catch (Exception ex) {
                    lbl.setText(ex.getMessage().toString() + "Second");
                    Log.e("POI Errorr",ex.getMessage().toString());
                }

                }```


##my result output and error##

here my path /document/primary:Download/flagCache/com.andro


id.packageinstaller.png is provided but file input stream find no file exist I try to check many solutions and different article no any of those materials helped me 

```2021-02-15 02:59:22.487 21798-21798/com.example.paymentmessage E/File path: /document/primary:Download/flagCache/com.android.packageinstaller.png
2021-02-15 02:59:22.487 21798-21798/com.example.paymentmessage E/New File path: /document/primary:Download/flagCache/com.android.packageinstaller.png
2021-02-15 02:59:22.488 21798-21798/com.example.paymentmessage E/POI Errorr: /document/primary:Download/flagCache/com.android.packageinstaller.png (No such file or directory)```

## i had include permission in manifests file##
```<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.paymentmessage">
    <uses-permission android:name="android.permission.SEND_SMS" />
    <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:roundIcon="@mipmap/ic_launcher_round"
        android:supportsRtl="true"
        android:theme="@style/AppTheme">
        <activity android:name=".broadcaster"></activity>
        <activity```


hope I will find a solution
### thank you in advance###