Android寫入系統設置對話框灰顯

我想寫入系統設置以更改屏幕亮度。爲此，我需要WRITE_SYSTEM_SETTINGS。我在Android 7.1上Android寫入系統設置對話框灰顯

我打電話給這個可以打開一個對話框，讓用戶啓用此權限。

if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) { 
    if (!Settings.System.canWrite(getApplicationContext())) { 
     Intent intent = new Intent(Settings.ACTION_MANAGE_WRITE_SETTINGS, Uri.parse("package:" + getPackageName())); 
     startActivityForResult(intent, 200); 

    } 
}

該對話框將打開，但打開權限的開關將變灰。我在做什麼錯？

編輯AndroidManifest.xml中

<?xml version="1.0" encoding="utf-8"?> 
<manifest xmlns:android="http://schemas.android.com/apk/res/android" 
    package="com.fimrc.mysensornetwork"> 

    <uses-permission android:name="android.permission.READ_CONTACTS" /> 
    <uses-permission android:name="android.permission.READ_CALENDAR" /> 
    <uses-permission android:name="android.permission.READ_PHONE_STATE" /> 
    <uses-permission android:name="android.permission.PROCESS_OUTGOING_CALLS" /> 
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" /> 
    <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" /> 
    <uses-permission android:name="android.permission.VIBRATE" /> 
    <uses-permission android:name="android.permission.WAKE_LOCK" /> 
    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" /> 
    <uses-permission android:name="android.permission.RECEIVE_SMS" /> 
    <uses-permission android:name="android.permission.READ_SMS" /> 
    <uses-permission android:name="android.permission.BLUETOOTH" /> 
    <uses-permission android:name="android.permission.BLUETOOTH_ADMIN" /> 
    <uses-permission android:name="android.permission.BATTERY_STATS" /> 
    <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" /> 
    <uses-permission android:name="android.permission.RECORD_AUDIO" /> 
    <uses-permission android:name="android.permission.ACCESS_WIFI_STATE" /> 
    <uses-permission android:name="android.permission.CHANGE_WIFI_STATE" /> 
    <uses-permission android:name="android.permission.INTERNET" /> 
    <uses-permission android:name="com.android.launcher.permission.INSTALL_SHORTCUT" /> 
    <uses-permission android:name="android.permission.ACCESS_LOCATION_EXTRA_COMMANDS" /> 
    <uses-permission android:name="android.permission.GET_ACCOUNTS" /> 
    <uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" /> 

    <uses-feature android:name="android.hardware.location.gps" /> 
    <uses-feature android:name="android.hardware.location.network" /> 

    <application 
     android:allowBackup="true" 
     android:icon="@mipmap/ic_launcher" 
     android:label="@string/app_name" 
     android:supportsRtl="true" 
     android:theme="@style/AppTheme"> 
     <activity 
      android:name=".gui.MainActivity" 
      android:launchMode="singleInstance"> 
      <intent-filter> 
       <action android:name="android.intent.action.MAIN" /> 

       <category android:name="android.intent.category.LAUNCHER" /> 
      </intent-filter> 
     </activity> 

     <service android:name=".SensorService" /> 
     <service 
      android:name=".PolicingService" 
      android:enabled="true" 
      android:exported="true" /> 

     <receiver 
      android:name=".PolicingReceiver" 
      android:enabled="true" 
      android:exported="true" /> 

     <activity android:name=".gui.policing.PolicingActivity" /> 
     <activity android:name=".gui.old.QuestionnaireActivity" /> 
     <activity android:name=".gui.policing.PolicingRatingActivity" /> 
     <activity android:name=".gui.SensorSettingsActivity" /> 
     <activity android:name=".gui.QuestionnaireActivity"></activity> 
    </application> 

</manifest>

在我的好兄弟手機就可以啓用這個權限。他採用了Android 6.

來源

2017-06-25 Felix Weilbach

你可以告訴你的清單？ – ligi

我已添加。 –

你可以嘗試加入'''''' – ligi

請加：

<uses-permission android:name="android.permission.WRITE_SETTINGS" />

來源

2017-06-25 22:12:01 ligi

Android寫入系統設置對話框灰顯

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