上回我们用python实现了自动刷抖音的功能（https://blog.csdn.net/u012539700/article/details/100058939），这回我们用android app的形式来实现自动刷抖音，这样就可以不用连接电脑啦。

  原理很简单，使用android无障碍里面的AccessibilityService就可以啦。

   首先在res目录下新建一个xml文件夹，然后命名一个simulatekey.xml文件，填入以下内容：

<?xml version="1.0" encoding="utf-8"?>
<accessibility-service
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:accessibilityEventTypes="typeAllMask"
    android:accessibilityFeedbackType="feedbackGeneric"
    android:accessibilityFlags="flagReportViewIds|flagRetrieveInteractiveWindows"
    android:canRetrieveWindowContent="true"
    android:description="@string/simulate_key_description"
    android:notificationTimeout="100"
    />

其中description就是会显示在你去无障碍里面开启服务的地方的提示文字。

清单文件里面增加配置：

  <service
            android:name=".simulatekey.SimulateKeyService"
            android:enabled="true"
            android:exported="true"
            android:permission="android.permission.BIND_ACCESSIBILITY_SERVICE">
            <intent-filter>
                <action android:name="android.accessibilityservice.AccessibilityService" />
            </intent-filter>

            <meta-data
                android:name="android.accessibilityservice"
                android:resource="@xml/simulatekey" />
        </service>

接下来是判断无障碍服务是否开启：

  public static boolean isAccessibilitySettingsOn(Context mContext) {
        int accessibilityEnabled = 0;
        final String service = mContext.getPackageName() + "/" + SimulateKeyService.class.getCanonicalName();
        try {
            accessibilityEnabled = Settings.Secure.getInt(
                    mContext.getApplicationContext().getContentResolver(),
                    android.provider.Settings.Secure.ACCESSIBILITY_ENABLED);
            Log.v(TAG, "accessibilityEnabled = " + accessibilityEnabled);
        } catch (Settings.SettingNotFoundException e) {
            Log.e(TAG, "Error finding setting, default accessibility to not found: "
                    + e.getMessage());
        }
        TextUtils.SimpleStringSplitter mStringColonSplitter = new TextUtils.SimpleStringSplitter(':');

        if (accessibilityEnabled == 1) {
            Log.v(TAG, "***ACCESSIBILITY IS ENABLED*** -----------------");
            String settingValue = Settings.Secure.getString(
                    mContext.getApplicationContext().getContentResolver(),
                    Settings.Secure.ENABLED_ACCESSIBILITY_SERVICES);
            if (settingValue != null) {
                mStringColonSplitter.setString(settingValue);
                while (mStringColonSplitter.hasNext()) {
                    String accessibilityService = mStringColonSplitter.next();

                    Log.v(TAG, "-------------- > accessibilityService :: " + accessibilityService + " " + service);
                    if (accessibilityService.equalsIgnoreCase(service)) {
                        Log.v(TAG, "We've found the correct setting - accessibility is switched on!");
                        return true;
                    }
                }
            }
        } else {
            Log.v(TAG, "***ACCESSIBILITY IS DISABLED***");
        }

        return false;
    }

  如果没有开启的话，我们就判断去开启这个服务：

   if(!SimulateKeyService.isAccessibilitySettingsOn(MainActivity.this)){
                    Intent intent = new Intent(Settings.ACTION_ACCESSIBILITY_SETTINGS);
                    startActivity(intent);
                }else{
                    startService(new Intent(MainActivity.this, SimulateKeyService.class));
                }

最后我们写一个SimulateKeyService服务继承AccessibilityService的onAccessibilityEvent方法：

 @Override
    public void onAccessibilityEvent(AccessibilityEvent event) {
        Log.d("awqtj",event.toString()+" ===== "+event.getPackageName());
        if(event==null ||event.getPackageName()==null){
            return;
        }

        if(event.getPackageName().equals("com.ss.android.ugc.aweme.lite")){

            final AccessibilityNodeInfo nodeInfo = event.getSource();
            if (nodeInfo != null &&  "android.support.v4.view.ViewPager".equals(nodeInfo.getClassName())){
                if(!isFirst){
                    return;
                }
                if(isFirst){
                    isFirst = false;
                }
                new Thread(new Runnable() {
                    @Override
                    public void run() {
                        try {
                            while(true){
                                Log.d("awqtj","================start "+nodeInfo.getClassName());

                                Random random = new Random();
                                int delay = random.nextInt(1000);
                                Thread.sleep(1000+delay);
                                {
                                    nodeInfo.performAction(AccessibilityNodeInfo.ACTION_SCROLL_FORWARD);
                                }
                                Log.d("awqtj","================end ");
                            }
                        } catch (InterruptedException e) {
                            e.printStackTrace();
                        }
                    }
                }).start();
            }else {
                Log.d("awqtj","node info null");
            }

        }
    }

然后，首次进入抖音的时候，你滑动一下，就会检测到抖音里面的viewpager这个控件，然后就可以实现不断自动刷抖音得金币啦，而且设置自动刷的时间是随机的，应该可以避免被系统检测到自动刷的机制。