无障碍服务描述

Question

我编写了一个非常简单的accessibilityService，我正在尝试在设置/辅助功能/我的应用程序中显示对服务的描述。下面是我所有的代码，应该将描述设置为"Hello!“但是这些设置仍然显示“没有可用的描述”。

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我的服务：

public class IdleService extends AccessibilityService{

    int interval = 100;
    int maxIdleTime = 20000;
    int idleTime = 0;
    Handler mHandler;
    String cProcess;

    @Override
    public void onServiceConnected(){

        mHandler = new Handler();

        AccessibilityServiceInfo info = new AccessibilityServiceInfo();
        // we are interested in all types of accessibility events
        info.describeContents();
        info.eventTypes = AccessibilityEvent.TYPES_ALL_MASK;
        info.feedbackType = AccessibilityServiceInfo.FEEDBACK_GENERIC;
        // we want to receive events in a certain interval
        info.notificationTimeout = interval;

        setServiceInfo(info);

        Log.e("IdleService", " idle service connected!");
        statusChecker.run();
    }

    @Override
    public void onAccessibilityEvent(AccessibilityEvent arg0) 
    {
        // TODO Auto-generated method stub
        Log.v("IdleService", "reseting idle time");
        idleTime = 0;
    }

    @Override
    public void onInterrupt() 
    {
        // TODO Auto-generated method stub
        Log.v("IdleService", "INTERUPTED");
    }

    public void setMaxIdleTimeInSeconds(int time)
    {

        maxIdleTime = time *1000;
    }


    Runnable statusChecker = new Runnable() 
    {

        @Override
        public void run() {
            // TODO Auto-generated method stub
            ActivityManager am = (ActivityManager) getApplicationContext()
                    .getSystemService(Context.ACTIVITY_SERVICE);

            List<ActivityManager.RunningTaskInfo> processList = am
                    .getRunningTasks(5);

            cProcess = processList.get(0).baseActivity.getPackageName();

            Log.v("IdleService", "Current PackageName:"+cProcess);
            cProcess = processList.get(0).baseActivity.getClassName();

            Log.v("IdleService", "Current ClassName:"+cProcess);
            idleTime +=100;
            Log.v("IdleService", "TICK TOCK, user Idle for:"+idleTime);
            if(idleTime>=maxIdleTime)
            {
                Log.v("IdleService", "we timed out do to inactivity");
                //mHandler.postDelayed(statusChecker, interval);
                //stopSelf();
            }else{


            }
            mHandler.postDelayed(statusChecker, interval);
        }


    };
}

在我的清单中我有这个作为服务：

<service android:name="com.myPackage.IdleService"
                android:permission="android.permission.BIND_ACCESSIBILITY_SERVICE">
                    <meta-data
                    android:name="android.accessibilityservice"
                    android:resource="@xml/accessibility_service_config" />
                    <intent-filter>
                        <action android:name="android.accessibilityservice.AccessibilityService" />
                    </intent-filter>

                </service>

，在我的res/xml中有一个accessibility_service_config.xml文件：

<accessibility-service xmlns:android="http://schemas.android.com/apk/res/android"
    android:description="@string/accessibility_service_description"

    android:settingsActivity="com.example.android.accessibility.ServiceSettingsActivity"
/>

，最后在res/values/ I中有strings.xml，如下所示：

<?xml version="1.0" encoding="utf-8"?>
<resources>
    <string name="accessibility_service_description">Hello!</string>
</resources>

Answer 1

我遇到了同样的问题，并最终使它发挥作用。我知道服务本身包括权限，但是您也需要将BIND_ACCESSIBILITY_SERVICE权限添加到清单中。

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

服务的<meta-data>必须命名为android.accessibilityservice，这是很好的。

最后，我不得不将apk推到我的设备上，然后重新启动它以进行更改。

注意：在清单中的<service>元素中添加description属性并不影响系统设置中显示的服务描述。