无障碍服务未启动 [英] accessibility service is not started

问题描述

我想在 android ics (4.0.3) 中记录所有 toast 事件，但我无法记录任何系统事件.服务只是没有启动！

I want to log all toasts events in android ics (4.0.3), but I was unable to log any system event. Service is just not started!

根据这个问题:onAccessibilityEvent(AccessibilityEvent event)不拦截通知

MyAccessibilityService.java

package com.test.toasts2;

import android.accessibilityservice.AccessibilityService;
import android.accessibilityservice.AccessibilityServiceInfo;
import android.app.Notification;
import android.os.Parcelable;
import android.util.Log;
import android.view.accessibility.AccessibilityEvent;
import android.widget.Toast;

public class MyAccessibilityService extends AccessibilityService {


    public static final String TAG = "volumeMaster";

    @Override
    public void onAccessibilityEvent(AccessibilityEvent event)
    {
        Log.v(TAG, "***** onAccessibilityEvent");
        Toast.makeText(getApplicationContext(), "Got event from: " + event.getPackageName(), Toast.LENGTH_LONG).show();
    }

    @Override
    public void onInterrupt()
    {
        Log.v(TAG, "***** onInterrupt");
    }

    @Override
    public void onServiceConnected()
    {
        Log.v(TAG, "***** onServiceConnected");       


        AccessibilityServiceInfo info = new AccessibilityServiceInfo();
        info.eventTypes = AccessibilityEvent.TYPE_NOTIFICATION_STATE_CHANGED;
        info.notificationTimeout = 100;
        info.feedbackType = AccessibilityEvent.TYPES_ALL_MASK;
        setServiceInfo(info);

    }
}

Toast2Activity.java

package com.test.toasts2;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.widget.Toast;

public class Toast2Activity extends Activity {
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        Intent i = new Intent(this, MyAccessibilityService.class);
        startService(i);
    }
}

AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.test.toasts2"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk android:minSdkVersion="15" />

    <application
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name" >
<service android:name=".MyAccessibilityService" android:label="@string/app_name" android:enabled="true" android:exported="false">
        <intent-filter>
            <action android:name="android.accessibilityservice.AccessibilityService" />
        </intent-filter>

</service>

        <activity
            android:name=".Toast2Activity"
            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>

我在清单中包含了活动标签(在应用程序启动时启动服务)，并且还尝试删除.没有改变.服务只是没有启动.我在日志 cat 中没有收到通知(onServiceConected 中的 Log.v).

I included activity tag in manifest (to start service on app start), and also tried to remove. Nothing changed. Service is just not started. I don't get notification in log cat (Log.v in onServiceConected).

我将它编译为普通应用程序(不是系统应用程序)，android 4.0.3.我做错了什么吗?

I am compiling this as normal app (not system app), android 4.0.3. Am I doing something wrong?

附加项目(可能是其他地方的错误，或者我编译错误):https://dl.dropbox.com/u/1928109/toast2.zip

Attached project (may be mistake is somewhere else, or maybe I am compiling it wrong): https://dl.dropbox.com/u/1928109/toast2.zip

推荐答案

您需要从系统设置菜单启用无障碍服务:

You need to enable the accessibility service from the system settings menu:

• 在测试设备上安装您的应用.

• Install your app on the testing device.

在设备上安装应用程序后，更改设备上的以下设置:

With the app installed on the device, change the following setting on the device:

主屏幕 > 系统设置 > 辅助功能 > 辅助功能服务 > Toast2 > 从关闭更改为开启，

Home Screen > System Settings > Accessibility > Accessibility Services > Toast2 > Change from Off to On,

其中 Toast2 是您的应用名称.

where Toast2 is your app name.

然后运行您的应用程序.

Then run your app.

AFAIK 没有方法可以在您的应用程序中以编程方式将辅助功能设置为开启模式.作为一种解决方法，您可以提示用户更改设置，如果他们同意单击按钮，则启动辅助功能系统设置，如下所示:

AFAIK there is no method to set accessibility programmatically to On mode from within your app. As a workaround you can prompt the user to change the setting and if they agree by clicking a button, launch the accessibility system settings like so:

Intent intent = new Intent(android.provider.Settings.ACTION_ACCESSIBILITY_SETTINGS);
startActivityForResult(intent, 0);

这篇关于无障碍服务未启动的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！