CODEWITHSUNDEEP
android
user1335632
user1335632

Reputation: 45

Permission denial: Can't access the SurfaceFlinger

I get this error when running my app. I also included the permission for surfaceFlinger in manifest.xml

"uses-permission android:name="android.permission.ACCESS_SURFACE_FLINGER"

but still it give the same error " can't access the SurfaceFlinger" in LogCat.

Basically i want to run the Development setting code in Dev tools. 

public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
    try {
        Class partypes[] = new Class[1];
        partypes[0] = String.class;
        Method getService= ServiceManager.getMethod("getService", partypes );
        Object arglist[] = new Object[1];
        arglist[0] = "SurfaceFlinger";
        IBinder flinger= (IBinder)getService.invoke(smObject, arglist );

  //    IBinder flinger = ServiceManager.getService("SurfaceFlinger");
        if (flinger != null) {
            Parcel data = Parcel.obtain();
            data.writeInterfaceToken("android.ui.ISurfaceComposer");
            data.writeInt(isChecked ? 1 : 0);
            flinger.transact(mCode, data, null, 0);
            data.recycle();

            updateFlingerOptions();
        }
    } catch (RemoteException ex) {
    } 
**catch (SecurityException e) {
        // TODO Auto-generated catch block
        String err=e.toString();
        Toast.makeText(DevelopmentSetting.this, err, Toast.LENGTH_SHORT).show();
    }**

    catch (NoSuchMethodException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    } catch (IllegalArgumentException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    } catch (IllegalAccessException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    } catch (InvocationTargetException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }
}
}

In catch SecurityException it gives the error java.lang.securityException but logcat it says permission denied : can't access surfaceFlinger.

and the manifest.xml is here

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.nustian.android"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk android:minSdkVersion="10" />
    <uses-permission android:name="android.permission.ACCESS_SURFACE_FLINGER"/>

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

    <application
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name" >

        <activity
            android:name=".DevelopmentSetting"
            android:label="@string/app_name" >

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

    </application>
</manifest>

Somebody help me.

Upvotes: 2

Views: 18445

Answers (3)

user3791871
user3791871

Reputation: 31

As a workaround, add this to your manifest file. UID media is able to use the surface flinger APIs, so sharing UID with it will allow your app to use it as well.

  coreApp="true"
  android:sharedUserId="android.uid.media"

Upvotes: 3

Christopher Fraser
Christopher Fraser

Reputation: 511

Your app needs to be signed with the platform certificate to access this permission. Only system apps generally have this. More info here:

https://groups.google.com/forum/#!topic/android-porting/aN6D_vL9xxE

Upvotes: 4

waqaslam
waqaslam

Reputation: 68187

Don't forget to add its relative permission:

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

Upvotes: 0

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