Flutter：无法在flutter中获得存储权限

Question

无法获取存储权限对话框，因此无法在 Flutter 中读取和写入存储中的任何内容。 我正在使用permission_handler: ^5.1.0+1 package.and 在 AndroidManifest 中添加了读/写权限。 我的android/app/src/main/AndroidManifest.xml 是这样的：-

<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.materialstock">
    <uses-permission android:name="android.permission.INTERNET"/>
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
    <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>
   <application
        android:label="materialstock"
        android:requestLegacyExternalStorage="true"
        android:icon="@mipmap/ic_launcher">
        <activity
            android:name=".MainActivity"
            android:launchMode="singleTop"
            android:theme="@style/LaunchTheme"
            android:configChanges="orientation|keyboardHidden|keyboard|screenSize|smallestScreenSize|locale|layoutDirection|fontScale|screenLayout|density|uiMode"
            android:hardwareAccelerated="true"
            android:windowSoftInputMode="adjustResize">
            <!-- Specifies an Android theme to apply to this Activity as soon as
                 the Android process has started. This theme is visible to the user
                 while the Flutter UI initializes. After that, this theme continues
                 to determine the Window background behind the Flutter UI. -->
            <meta-data
              android:name="io.flutter.embedding.android.NormalTheme"
              android:resource="@style/NormalTheme"
              />
            <!-- Displays an Android View that continues showing the launch screen
                 Drawable until Flutter paints its first frame, then this splash
                 screen fades out. A splash screen is useful to avoid any visual
                 gap between the end of Android's launch screen and the painting of
                 Flutter's first frame. -->
            <meta-data
              android:name="io.flutter.embedding.android.SplashScreenDrawable"
              android:resource="@drawable/launch_background"
              />
            <intent-filter>
                <action android:name="android.intent.action.MAIN"/>
                <category android:name="android.intent.category.LAUNCHER"/>
            </intent-filter>
        </activity>
        <!-- Don't delete the meta-data below.
             This is used by the Flutter tool to generate GeneratedPluginRegistrant.java -->
        <meta-data
            android:name="flutterEmbedding"
            android:value="2" />
    </application>
</manifest>

我的颤振代码是这样的：-

FlatButton(
                child: Padding(
                  padding: const EdgeInsets.fromLTRB(20, 10, 20, 10),
                  child: Text('Grant Request'),
                ),
                color: Colors.blue,
                onPressed: () async {
                  bool req = await Permission.storage.request().isGranted;
                  print(req);
                },
              )

我得到了这个错误-

D/permissions_handler( 6106): No permissions found in manifest for: 15
I/flutter ( 6106): false

Answer 1

将插件更新到^5.1.0+2 版本。检查维护者的答案here。