Android搶紅包插件實(shí)現(xiàn)原理淺析

更新時(shí)間：2016年06月20日 11:28:46 作者：zhangke3016

這篇文章主要為大家詳細(xì)介紹了Android搶紅包插件的實(shí)現(xiàn)原理，由淺入深的幫助大家分析Android搶紅包的原理，感興趣的小伙伴們可以參考一下

搶紅包，先看效果圖~

實(shí)現(xiàn)自動(dòng)搶紅包，解決問(wèn)題有兩點(diǎn)：

一：如何實(shí)時(shí)監(jiān)聽(tīng)發(fā)紅包的事件

二：如何在紅包到來(lái)的時(shí)候自動(dòng)進(jìn)入頁(yè)面并自動(dòng)點(diǎn)擊紅包

一、如何獲取紅包到來(lái)的事件

為了獲取紅包到來(lái)狀態(tài)欄的變化，我們要用到一個(gè)類(lèi)：Accessibility

許多Android使用者因?yàn)楦鞣N情況導(dǎo)致他們要以不同的方式與手機(jī)交互。
這包括了有些用戶由于視力上，身體上，年齡上的問(wèn)題致使他們不能看完整的屏幕或者使用觸屏，也包括了無(wú)法很好接收到語(yǔ)音信息和提示的聽(tīng)力能力比較弱的用戶。
Android提供了Accessibility功能和服務(wù)幫助這些用戶更加簡(jiǎn)單地操作設(shè)備，包括文字轉(zhuǎn)語(yǔ)音（這個(gè)不支持中文），觸覺(jué)反饋，手勢(shì)操作，軌跡球和手柄操作。

OK,了解到這一點(diǎn)，那么接下來(lái)就順利點(diǎn)了，首先來(lái)看看Accessibility以及AccessibilityService的使用
1.新建一個(gè)類(lèi)繼承AccessibilityService，并在AndroidManifest文件里注冊(cè)它：

 <uses-permission android:name="android.permission.BIND_ACCESSIBILITY_SERVICE" /> 
<application> 
<service  android:name="com.zkhb.weixinqinghongbao.service.QiangHongBaoService"    
android:label="@string/app_name"   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/qianghongbao_service_config" />
   </service>
</application>

在子類(lèi)QiangHongBaoService里實(shí)現(xiàn)幾個(gè)重要的重載方法：

onServiceConnected() - 可選。系統(tǒng)會(huì)在成功連接上你的服務(wù)的時(shí)候調(diào)用這個(gè)方法，在這個(gè)方法里你可以做一下初始化工作，例如設(shè)備的聲音震動(dòng)管理，也可以調(diào)用setServiceInfo()進(jìn)行配置工作。
onAccessibilityEvent() - 必須。通過(guò)這個(gè)函數(shù)可以接收系統(tǒng)發(fā)送來(lái)的AccessibilityEvent，接收來(lái)的AccessibilityEvent是經(jīng)過(guò)過(guò)濾的，過(guò)濾是在配置工作時(shí)設(shè)置的。

onInterrupt() - 必須。這個(gè)在系統(tǒng)想要中斷AccessibilityService返給的響應(yīng)時(shí)會(huì)調(diào)用。在整個(gè)生命周期里會(huì)被調(diào)用多次。
onUnbind() - 可選。在系統(tǒng)將要關(guān)閉這個(gè)AccessibilityService會(huì)被調(diào)用。在這個(gè)方法中進(jìn)行一些釋放資源的工作。

然后在/res/xml/accessibility_service_config.xml：

<accessibility-service xmlns:android="http://schemas.android.com/apk/res/android" android:accessibilityEventTypes="typeNotificationStateChanged|typeWindowStateChanged|typeWindowContentChanged"
  android:accessibilityFeedbackType="feedbackGeneric"
  android:accessibilityFlags=""
  android:canRetrieveWindowContent="true"
  android:description="@string/accessibility_description"
  android:notificationTimeout="100"
  android:packageNames="com.tencent.mm" />

二、主要關(guān)注點(diǎn)以及如何在紅包到來(lái)的時(shí)候自動(dòng)進(jìn)入頁(yè)面并自動(dòng)點(diǎn)擊紅包

在onAccessibilityEvent方法中監(jiān)聽(tīng)狀態(tài)欄的變化，主要有：

AccessibilityEvent.TYPE_NOTIFICATION_STATE_CHANGED、

AccessibilityEvent.TYPE_WINDOW_STATE_CHANGED、

AccessibilityEvent.TYPE_WINDOW_CONTENT_CHANGED

在響應(yīng)窗體以及窗體內(nèi)容變化時(shí)處理相關(guān)邏輯，獲取帶微信消息時(shí)以下代碼打開(kāi)消息：

 //將微信的通知欄消息打開(kāi)
    Notification notification = (Notification) event.getParcelableData();
    PendingIntent pendingIntent = notification.contentIntent;
    try {
      pendingIntent.send();
    } catch (PendingIntent.CanceledException e) {
      e.printStackTrace();
    }

具體代碼網(wǎng)上有很多，一般都是通過(guò)：findAccessibilityNodeInfosByText、findAccessibilityNodeInfosByViewId查找文本或者資源節(jié)點(diǎn)進(jìn)行點(diǎn)擊操作，但新版微信開(kāi)紅包頁(yè)面進(jìn)行了處理，沒(méi)有文本信息，而如果采用：

圖中resouces-id這種形式就可能出現(xiàn)這種情況:

在了解整個(gè)核心后,獲取事件不外乎就是通過(guò)文本與id判斷，那么就可以將文本改為圖標(biāo)方式，將id改為動(dòng)態(tài)id(每次顯示都是隨機(jī)生成),這樣一來(lái)就可以提高外掛的門(mén)檻。

如何進(jìn)行規(guī)避呢，目前我想的是既然開(kāi)紅包的頁(yè)面文本和ID都有可能會(huì)變，那我們能不能找個(gè)不變的進(jìn)行判斷呢，考慮過(guò)后，我覺(jué)得最可能不變的地方就是開(kāi)紅包這個(gè)按鈕的位置，也就是圖中的bounds，于是在思考過(guò)后有了下面的處理:

 for (int i = 0; i < nodeInfo.getChildCount(); i++) {
      //Log.e("TAG", "getViewIdResourceName :"+nodeInfo.getChild(i).getViewIdResourceName());
      Rect outBounds = new Rect();
      nodeInfo.getChild(i).getBoundsInScreen(outBounds);
      int left_dp = px2dip(this, 400);
      int top_dp = px2dip(this, 1035);
      int right_dp = px2dip(this, 682);
      int bottom_dp = px2dip(this, 1320);

      int left_px = dip2px(this, left_dp);
      int top_px = dip2px(this, top_dp);
      int right_px = dip2px(this, right_dp);
      int bottom_px = dip2px(this, bottom_dp);

      Rect mStandar = new Rect(left_px,top_px,right_px,bottom_px);
      if(mStandar.contains(outBounds)){
        Log.e("TAG", "outBounds.left :"+outBounds.left+";outBounds.top :"+outBounds.top+";outBounds.right :"+outBounds.right+";outBounds.bottom :"+outBounds.bottom);
        nodeInfo.getChild(i).performAction(AccessibilityNodeInfo.ACTION_CLICK);
        break;
      }
    }

這里取的矩形區(qū)域要比按鈕區(qū)域稍大點(diǎn)，然后判斷到開(kāi)紅包頁(yè)面按鈕是否在我們預(yù)先設(shè)置的區(qū)域內(nèi)，如果在，我們直接進(jìn)行點(diǎn)擊開(kāi)紅包操作:AccessibilityNodeInfo.ACTION_CLICK。
其他比如如何防止重復(fù)搶等細(xì)節(jié)問(wèn)題，也是要處理的問(wèn)題。
好了，直接放下關(guān)鍵代碼，僅供參考:

package com.zkhb.weixinqinghongbao.service;

import java.util.Date;
import java.util.List;

import android.accessibilityservice.AccessibilityService;
import android.annotation.SuppressLint;
import android.annotation.TargetApi;
import android.app.KeyguardManager;
import android.app.KeyguardManager.KeyguardLock;
import android.app.Notification;
import android.app.NotificationManager;
import android.app.PendingIntent;
import android.content.Context;
import android.content.Intent;
import android.graphics.Rect;
import android.os.Build;
import android.os.Handler;
import android.os.PowerManager;
import android.os.PowerManager.WakeLock;
import android.util.Log;
import android.view.accessibility.AccessibilityEvent;
import android.view.accessibility.AccessibilityManager;
import android.view.accessibility.AccessibilityNodeInfo;
import android.widget.Toast;

import com.zkhb.weixinqinghongbao.MainActivity;
import com.zkhb.weixinqinghongbao.R;
import com.zkhb.weixinqinghongbao.entity.HongBaoInfo;
import com.zkhb.weixinqinghongbao.util.DateFormatUtils;
import com.zkhb.weixinqinghongbao.util.LogUtil;

/**
 *
 * 搶紅包服務(wù)
 */
@SuppressLint("NewApi") 
public class QiangHongBaoService extends AccessibilityService {

//  static final String TAG = "QiangHongBao";

  /** 微信的包名*/
  static final String WECHAT_PACKAGENAME = "com.tencent.mm";
  /** 紅包消息的關(guān)鍵字*/
  static final String HONGBAO_TEXT_KEY = "[微信紅包]";
  /** 紅包消息的關(guān)鍵字*/
  static final String HONGBAO_TEXT_KEY1 = "微信紅包";

  private static final int ENVELOPE_RETURN = 0;

  private static final String LOCK_TAG = "屏幕";

  Handler handler = new Handler();
  /** 是否在搶紅包界面里*/
//  public boolean isInMM=false;
  /** 是否可以點(diǎn)擊*/
//  public boolean ISCLICKED=false;
  /** 是否進(jìn)入過(guò)拆紅包界面*/
  public static boolean ISCOMINQIANGCHB=false;
  //真正的
  public static boolean ISCOMINQIANGCHB2=false;
  //真正的判斷
  public static boolean ISCOMINQIANGCHB3=false;
   /** 是否來(lái)自通知欄*/
  private static boolean ISCOMNOTIFY=false;

  private PowerManager pm;
  //點(diǎn)亮屏幕
  private WakeLock mWakeLock;
   //解鎖鎖定屏幕
  private KeyguardLock keyguardLock;
  /**判斷之前用戶是否鎖屏 */
  private static boolean islock=false;
  /**通知服務(wù) */
  private NotificationManager n_manager;
  public void unlock(){
    if(pm==null){
      pm = (PowerManager) getApplication().getSystemService(Context.POWER_SERVICE);
    }
    boolean isScreenOn = pm.isScreenOn();//如果為true，則表示屏幕“亮”了，否則屏幕“暗”了。
    if(!isScreenOn){
      islock=true;
      KeyguardManager keyguardManager = (KeyguardManager)getSystemService(KEYGUARD_SERVICE);
      keyguardLock = keyguardManager.newKeyguardLock(LOCK_TAG);
      keyguardLock.disableKeyguard();

      mWakeLock = pm.newWakeLock(PowerManager.FULL_WAKE_LOCK | PowerManager.ACQUIRE_CAUSES_WAKEUP, LOCK_TAG); 
      mWakeLock.acquire();
    }
  }

  public void lock(){
    if(islock){
      //釋放屏幕常亮鎖
      if(null != mWakeLock) {
        mWakeLock.release();
      }
      //屏幕鎖定
      if(keyguardLock!=null){
        keyguardLock.reenableKeyguard();
      }
    }
  }
  @Override
  public void onAccessibilityEvent(AccessibilityEvent event) {
    final int eventType = event.getEventType();

    LogUtil.info("事件---->" + event);

    //通知欄事件
    if(eventType == AccessibilityEvent.TYPE_NOTIFICATION_STATE_CHANGED) {
      unlock();
      List<CharSequence> texts = event.getText();
      if(!texts.isEmpty()) {
        for(CharSequence t : texts) {
          String text = String.valueOf(t);
          if(text.contains(HONGBAO_TEXT_KEY)) {
            ISCOMNOTIFY=true;
            ISCOMINQIANGCHB=false;
            openNotify(event);
            break;
          }
        }
      }
    } else if(eventType == AccessibilityEvent.TYPE_WINDOW_STATE_CHANGED) {
      unlock();
      openHongBao(event);
//      AccessibilityNodeInfo nodeInfo = getRootInActiveWindow();
//      List<AccessibilityNodeInfo> findAccessibilityNodeInfosByText = nodeInfo.findAccessibilityNodeInfosByText("領(lǐng)取紅包");
//      if(findAccessibilityNodeInfosByText.isEmpty()){
//       isInMM=false;
//      }else{
//       isInMM=true;
//      }
//      List<CharSequence> text = event.getText();
//      if(text.size()>=0){
//       CharSequence charSequence = text.get(0);
////        if(charSequence.equals("微信")){
////          isInMM=true;
////        }else{
////          isInMM=false;
////        }
//      }
    }else if(eventType==AccessibilityEvent.TYPE_WINDOW_CONTENT_CHANGED && ISCOMNOTIFY){
      unlock();
      openHongBao(event);
      List<AccessibilityNodeInfo> InfoText = getRootInActiveWindow().findAccessibilityNodeInfosByText("領(lǐng)取紅包");
      if(!InfoText.isEmpty()){
        checkKey2();
        ISCOMNOTIFY=false;
      }
    }
  }
  /*@Override
  protected boolean onKeyEvent(KeyEvent event) {
    //return super.onKeyEvent(event);
    return true;
  }*/
  @Override
  public boolean onUnbind(Intent intent) {
    Toast.makeText(this, "斷開(kāi)搶紅包服務(wù)", Toast.LENGTH_SHORT).show();
    ISCOMINQIANGCHB=false;
    islock=false;
    ISCOMINQIANGCHB2=false;
    ISCOMINQIANGCHB3=false;
    ISCOMNOTIFY=false;
    setNotification("已關(guān)閉搶紅包小助手服務(wù)~~",Notification.FLAG_AUTO_CANCEL,"已關(guān)閉搶紅包小助手服務(wù)~~~");
    return super.onUnbind(intent);
  }
  @Override
  public void onInterrupt() {
    Toast.makeText(this, "中斷搶紅包服務(wù)", Toast.LENGTH_SHORT).show();
  }

  @Override
  protected void onServiceConnected() {
    super.onServiceConnected();
    ISCOMINQIANGCHB=false;
    ISCOMINQIANGCHB2=false;
    ISCOMINQIANGCHB3=false;
    islock=false;
    ISCOMNOTIFY=false;

    setNotification("已開(kāi)啟搶紅包小助手服務(wù)~~",Notification.FLAG_NO_CLEAR,"已開(kāi)啟搶紅包小助手服務(wù)~~~");

    Toast.makeText(this, "連接搶紅包服務(wù)", Toast.LENGTH_SHORT).show();
  }

  private void setNotification(String content,int flags,String title) {
    if(n_manager==null){
      n_manager = (NotificationManager) getApplicationContext().getSystemService(Context.NOTIFICATION_SERVICE);
    }
    n_manager.cancelAll();
    Notification notification=new Notification(R.drawable.ic_launcher, content, System.currentTimeMillis());
//    notification.defaults |= Notification.DEFAULT_VIBRATE;
//    long[] vibrate = {0,100,200,300}; //0毫秒后開(kāi)始振動(dòng)，振動(dòng)100毫秒后停止，再過(guò)200毫秒后再次振動(dòng)300毫秒
//    notification.vibrate=vibrate;
    notification.flags |= flags; //表明在點(diǎn)擊了通知欄中的"清除通知"后，此通知不清除，

    Intent notificationIntent = new Intent(this,MainActivity.class); //點(diǎn)擊該通知后要跳轉(zhuǎn)的Activity
    PendingIntent contentIntent = PendingIntent.getActivity(getApplicationContext(),0,notificationIntent,0);
    notification.setLatestEventInfo(getApplicationContext(), title, "進(jìn)入微信搶紅包~~", contentIntent);

    n_manager.notify(0, notification);
  }

  private void sendNotifyEvent(){
    AccessibilityManager manager= (AccessibilityManager)getSystemService(ACCESSIBILITY_SERVICE);
    if (!manager.isEnabled()) {
      return;
    }
    AccessibilityEvent event=AccessibilityEvent.obtain(AccessibilityEvent.TYPE_NOTIFICATION_STATE_CHANGED);
    event.setPackageName(WECHAT_PACKAGENAME);
    event.setClassName(Notification.class.getName());
    CharSequence tickerText = HONGBAO_TEXT_KEY;
    event.getText().add(tickerText);
    manager.sendAccessibilityEvent(event);
  }

  /** 打開(kāi)通知欄消息*/
  @TargetApi(Build.VERSION_CODES.JELLY_BEAN)
  private void openNotify(AccessibilityEvent event) {
    if(event.getParcelableData() == null || !(event.getParcelableData() instanceof Notification)) {
      return;
    }
    //將微信的通知欄消息打開(kāi)
    Notification notification = (Notification) event.getParcelableData();
    PendingIntent pendingIntent = notification.contentIntent;
    try {
      pendingIntent.send();
    } catch (PendingIntent.CanceledException e) {
      e.printStackTrace();
    }
  }

  @TargetApi(Build.VERSION_CODES.JELLY_BEAN)
  private void openHongBao(AccessibilityEvent event) {
    if("com.tencent.mm.plugin.luckymoney.ui.LuckyMoneyReceiveUI".equals(event.getClassName())) {
      //點(diǎn)中了紅包，下一步就是去拆紅包
      ISCOMINQIANGCHB=true;
      ISCOMINQIANGCHB2=true;
      checkKey1();
    } else if("com.tencent.mm.plugin.luckymoney.ui.LuckyMoneyDetailUI".equals(event.getClassName())) {
      //拆完紅包后看詳細(xì)的紀(jì)錄界面
       LogUtil.info("事件---->com.tencent.mm.plugin.luckymoney.ui.LuckyMoneyDetailUI");
       //nonething
//     if(ISCOMINQIANGCHB){
//       ISCOMINQIANGCHB=false;
//     }
       if(ISCOMINQIANGCHB2){
         ISCOMINQIANGCHB3=true;
       }else{
         ISCOMINQIANGCHB3=false;
       }
      checkKey3();
      ISCOMINQIANGCHB=true;
      ISCOMINQIANGCHB2=false;
      performGlobalAction(AccessibilityService.GLOBAL_ACTION_BACK);
      if(getSharedPreferences("config", Context.MODE_PRIVATE).getBoolean("auto", false)){
        performGlobalAction(AccessibilityService.GLOBAL_ACTION_HOME);
      }
      lock();
    } else if("com.tencent.mm.ui.LauncherUI".equals(event.getClassName())) {
//     isInMM=true;
      //在聊天界面,去點(diǎn)中紅包
      LogUtil.info("事件---->com.tencent.mm.ui.LauncherUI");
      checkKey2();
    }
  }
  @SuppressLint("NewApi") @TargetApi(Build.VERSION_CODES.JELLY_BEAN)
  private void checkKey3() {
    AccessibilityNodeInfo nodeInfo = getRootInActiveWindow();
     if(nodeInfo == null) {
       LogUtil.info("rootWindow為空333");
       return;
     }
     //TODO
     List<AccessibilityNodeInfo> findAccessibilityNodeInfosByText = nodeInfo.findAccessibilityNodeInfosByText("元");
     if(findAccessibilityNodeInfosByText.size()>=0){
       AccessibilityNodeInfo accessibilityNodeInfo2 = findAccessibilityNodeInfosByText.get(0).getParent();
       CharSequence money = accessibilityNodeInfo2.getChild(2).getText();
       CharSequence name = accessibilityNodeInfo2.getChild(0).getText();
       if(ISCOMINQIANGCHB3){
         HongBaoInfo info=new HongBaoInfo();
         info.setStrDateTime(DateFormatUtils.format("yyyy-MM-dd HH:mm:ss", new Date()));
         info.setStrMoney(money+"");
         info.setStrName(name+"");
         info.save();
       }
       Toast.makeText(getApplicationContext(), money+":::"+name, 0).show();
     }
//    List<AccessibilityNodeInfo> findAccessibilityNodeInfosByViewId = nodeInfo.findAccessibilityNodeInfosByViewId("com.tencent.mm:id/aw8");
//    AccessibilityNodeInfo accessibilityNodeInfo = findAccessibilityNodeInfosByViewId.get(0);
//    CharSequence text = accessibilityNodeInfo.getText(); 
  }

  private void checkKey1() {
    AccessibilityNodeInfo nodeInfo = getRootInActiveWindow();
    if(nodeInfo == null) {
      LogUtil.info("rootWindow為空11111");
      return;
    }

    for (int i = 0; i < nodeInfo.getChildCount(); i++) {
      Log.e("TAG", "getViewIdResourceName :"+nodeInfo.getChild(i).getViewIdResourceName());
      Rect outBounds = new Rect();
      nodeInfo.getChild(i).getBoundsInScreen(outBounds);
      int left_dp = px2dip(this, 400);
      int top_dp = px2dip(this, 1035);
      int right_dp = px2dip(this, 682);
      int bottom_dp = px2dip(this, 1320);

      int left_px = dip2px(this, left_dp);
      int top_px = dip2px(this, top_dp);
      int right_px = dip2px(this, right_dp);
      int bottom_px = dip2px(this, bottom_dp);

      Rect mStandar = new Rect(left_px,top_px,right_px,bottom_px);
      if(mStandar.contains(outBounds)){
        Log.e("TAG", "outBounds.left :"+outBounds.left+";outBounds.top :"+outBounds.top+";outBounds.right :"+outBounds.right+";outBounds.bottom :"+outBounds.bottom);
        nodeInfo.getChild(i).performAction(AccessibilityNodeInfo.ACTION_CLICK);
        break;
      }
//     nodeInfo.performAction(action)//[405,1042][675,1312]
    }
    //List<AccessibilityNodeInfo> list = nodeInfo.findAccessibilityNodeInfosByText("拆紅包");

// List<AccessibilityNodeInfo> list = nodeInfo.findAccessibilityNodeInfosByViewId("com.tencent.mm:id/b5d");
//    for(AccessibilityNodeInfo n : list) {
//      n.performAction(AccessibilityNodeInfo.ACTION_CLICK);
//    }
  }

  private void checkKey2() {
    AccessibilityNodeInfo nodeInfo = getRootInActiveWindow();
    if(nodeInfo == null) {
      LogUtil.info("rootWindow為空222222");
      return;
    }
    List<AccessibilityNodeInfo> list = nodeInfo.findAccessibilityNodeInfosByText("領(lǐng)取紅包");
    if(list.isEmpty()) {
      list = nodeInfo.findAccessibilityNodeInfosByText(HONGBAO_TEXT_KEY);
      for(AccessibilityNodeInfo n : list) {
        LogUtil.info("-->微信紅包:" + n);
        n.performAction(AccessibilityNodeInfo.ACTION_CLICK);
        break;
      }
    } else {
      //最新的紅包領(lǐng)起
      AccessibilityNodeInfo parent = list.get(list.size() - 1).getParent();
//     Log.w(TAG, "ISCLICKED::"+ISCLICKED)!ISCLICKED;
      if(parent != null && !ISCOMINQIANGCHB) {
        parent.performAction(AccessibilityNodeInfo.ACTION_CLICK);
      }
//      for(int i = list.size() - 1; i >= 0; i --) {
//        AccessibilityNodeInfo parent = list.get(i).getParent();
//        Log.i(TAG, "-->領(lǐng)取紅包:" + parent);
//        if(parent != null && parent.isClickable()) {
//          parent.performAction(AccessibilityNodeInfo.ACTION_CLICK);
//          break;
//        }
//      }
//      performGlobalAction(AccessibilityService.GLOBAL_ACTION_BACK);
    }
  }
  /**
   * @param info 當(dāng)前節(jié)點(diǎn)
   * @param matchFlag 需要匹配的文字
   * @param type 操作的類(lèi)型
   */
  @SuppressLint("NewApi") 
  public void recycle(AccessibilityNodeInfo info, String matchFlag, int type) {
    if (info != null) {
      if (info.getChildCount() == 0) {
        CharSequence desrc = info.getContentDescription();
        switch (type) {
          case ENVELOPE_RETURN://返回
            if (desrc != null && matchFlag.equals(info.getContentDescription().toString().trim())) {
              if (info.isCheckable()) {
                info.performAction(AccessibilityNodeInfo.ACTION_CLICK);
              } else {
                performGlobalAction(AccessibilityService.GLOBAL_ACTION_BACK);
              }
            }
            break;
        }
      } else {
        int size = info.getChildCount();
        for (int i = 0; i < size; i++) {
          AccessibilityNodeInfo childInfo = info.getChild(i);
          if (childInfo != null) {
            LogUtil.info("index: " + i + " info" + childInfo.getClassName() + " : " + childInfo.getContentDescription()+" : "+info.getText());
            recycle(childInfo, matchFlag, type);
          }
        }
      }
    }
  }
  @Override
  public void onDestroy() {
    super.onDestroy();
    lock();
  }
  /** 
   * 根據(jù)手機(jī)的分辨率從 dip 的單位 轉(zhuǎn)成為 px(像素) 
   */ 
  public static int dip2px(Context context, float dpValue) { 
    final float scale = context.getResources().getDisplayMetrics().density; 
    return (int) (dpValue * scale + 0.5f); 
  } 

  /** 
   * 根據(jù)手機(jī)的分辨率從 px(像素) 的單位 轉(zhuǎn)成為 dp 
   */ 
  public static int px2dip(Context context, float pxValue) { 
//    final float scale = context.getResources().getDisplayMetrics().density; 
    return (int) (pxValue / 3 + 0.5f); //3是本人手機(jī)的設(shè)備密度
  } 
}

AccessibilityService還可以用在智能安裝、虛擬按鍵上都有很多應(yīng)用，這樣的實(shí)踐只是給我們一種解決問(wèn)題另外的一種思路，問(wèn)題嘛，總還是要解決的。

以上就是本文的全部?jī)?nèi)容，希望對(duì)大家的學(xué)習(xí)有所幫助，也希望大家多多支持腳本之家。

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