Android 实现自动抢微信红包

原理

我们使用的还是安卓自带的辅助功能 AccessibilityService 。
先来讲述以下原理，原理很简单，当页面发生变化的时候，搜索屏幕中的关键字，搜索到了就点开。这个原理在微信旧版本的自动抢红包是有效的，但是在新版本中，开红包的界面没办法这么做了，那我们需要自己模拟点击动作，从而点开这个红包。
AccessibilityService 在 SDK24 (即Android 7.0) 引入了一个方法 dispatchGesture ，从而使我们可以不用 root 就能模拟点击动作。所以在 app/build.gradle 中我们将最小的 SDK 版本设置为 24( minSdkVersion 24)，所以如果你的安卓手机系统小于安卓 7.0，那就没办法使用我这个抢红包方法了。

onAccessibilityEvent

在辅助功能里面开启服务之后，onAccessibilityEvent 会接受到一些事件。

public void onAccessibilityEvent(AccessibilityEvent event) {
}

通过 event.getEventType() 就能获得当前界面的事件是什么。常用的事件如下。

事件	作用
TYPES_ALL_MASK	所有事件
TYPE_NOTIFICATION_STATE_CHANGED	通知栏事件
TYPE_VIEW_CLICKED	点击事件
TYPE_VIEW_FOCUSED	获取焦点事件
TYPE_VIEW_LONG_CLICKED	长按事件
TYPE_VIEW_SCROLLED	页面变动事件
TYPE_VIEW_SELECTED	控件选中
TYPE_VIEW_TEXT_CHANGED	输入框文本改变
TYPE_VIEW_TEXT_SELECTION_CHANGED	输入框文本 selection 改变
TYPE_WINDOW_CONTENT_CHANGED	窗口内容改变
TYPE_WINDOW_STATE_CHANGED	窗口状态改变

所以我们用到的其中的四个 TYPE_NOTIFICATION_STATE_CHANGED、TYPE_WINDOW_STATE_CHANGED、TYPE_VIEW_SCROLLED、TYPE_WINDOW_CONTENT_CHANGED。

创建 Service

package sms.example.com.automatic.service;import android.accessibilityservice.AccessibilityService;
import android.accessibilityservice.GestureDescription;
import android.app.Notification;
import android.app.PendingIntent;
import android.graphics.Path;
import android.graphics.Point;
import android.os.Handler;
import android.util.Log;
import android.view.accessibility.AccessibilityEvent;
import android.view.accessibility.AccessibilityNodeInfo;
import android.widget.Toast;import java.util.List;import sms.example.com.automatic.utils.ScreenUtils;public class WeChetService extends AccessibilityService {private static final String TAG = "WeChetService";private static final String ENVELOPE_TEXT_KEY = "[微信红包]";private static final String WECHET_PACKAGE_NAME = "com.tencent.mm";private static final String WECHET_LAUCHER = "com.tencent.mm.ui.LauncherUI";private static final String LUCKEY_MONEY_RECEIVER = "com.tencent.mm.plugin.luckymoney.ui.LuckyMoneyReceiveUI";private static final String LUCKEY_MONEY_DETAIL = "com.tencent.mm.plugin.luckymoney.ui.LuckyMoneyDetailUI";private Handler handler = new Handler();private CharSequence mClassName = "";@Overridepublic void onAccessibilityEvent(AccessibilityEvent event) {final int eventType = event.getEventType();switch (eventType) {case AccessibilityEvent.TYPE_NOTIFICATION_STATE_CHANGED:List<CharSequence> texts = event.getText();if (!texts.isEmpty()) {for (CharSequence t : texts) {String text = String.valueOf(t);Log.d(TAG, "监控微信消息==" + text);if (text.contains(ENVELOPE_TEXT_KEY)) {openNotification(event);break;}}}break;case AccessibilityEvent.TYPE_WINDOW_STATE_CHANGED:openEnvelope(event);break;case AccessibilityEvent.TYPE_VIEW_SCROLLED:case AccessibilityEvent.TYPE_WINDOW_CONTENT_CHANGED:openEnvelopeContent(event);break;default:break;}}/*** 打开通知栏* @param event*/private void openNotification(AccessibilityEvent event) {if (event.getParcelableData() == null || !(event.getParcelableData() instanceof Notification)) {return;}Notification notification = (Notification) event.getParcelableData();PendingIntent pendingIntent = notification.contentIntent;try {pendingIntent.send();} catch (PendingIntent.CanceledException e) {e.printStackTrace();}}private void openEnvelope(AccessibilityEvent event) {CharSequence className = event.getClassName();CharSequence packageName = event.getPackageName();boolean isWechetPage = WECHET_PACKAGE_NAME.equals(packageName);if(!isWechetPage) {return;}if (className.toString().contains(WECHET_PACKAGE_NAME)) {mClassName = className;}Log.i("openEnvelope", event.getClassName() + "");if (WECHET_LAUCHER.equals(className)) {findRedPacket();} else if (LUCKEY_MONEY_RECEIVER.equals(className)) {openRedPacket();} else if (LUCKEY_MONEY_DETAIL.equals(className)) {handler.postDelayed(new Runnable() {@Overridepublic void run() {clickBackKey();}}, 300);// Toast.makeText(this, "红包已经抢完--------", Toast.LENGTH_SHORT).show();}}private void openEnvelopeContent(AccessibilityEvent event) {Log.i("openEnvelopeContent", mClassName + "");if (mClassName.equals(WECHET_LAUCHER)) {findRedPacket();}}/*** 寻找领取红包关键字,找到之后点击打开*/private void findRedPacket() {AccessibilityNodeInfo nodeInfo = getRootInActiveWindow();if (nodeInfo == null) {return;}List<AccessibilityNodeInfo> list = nodeInfo.findAccessibilityNodeInfosByText("领取红包");if (list.isEmpty()) {return;}for (AccessibilityNodeInfo info : list) {AccessibilityNodeInfo parent = info.getParent();if (parent != null) {parent.performAction(AccessibilityNodeInfo.ACTION_CLICK);break;}}}/*** 打开红包,加延时是因为红包界面出现会有延时* x 表示开字相对屏幕所在的横坐标, ｙ 表示开字相对屏幕所在的纵坐标，不同手机会有不一样*/private void openRedPacket() {final int x = ScreenUtils.getWindowsWidth(WeChetService.this) / 2;final int y = 1200;handler.postDelayed(new Runnable() {@Overridepublic void run() {dispatchGestureView(x, y);}}, 300);}/*** 模拟点击事件* @param x 横坐标* @param y 纵坐标*/private void dispatchGestureView(int x, int y) {Point position = new Point(x, y);GestureDescription.Builder builder = new GestureDescription.Builder();Path p = new Path();p.moveTo(position.x, position.y);builder.addStroke(new GestureDescription.StrokeDescription(p, 0L, 500L));GestureDescription gesture = builder.build();dispatchGesture(gesture, new GestureResultCallback() {@Overridepublic void onCompleted(GestureDescription gestureDescription) {super.onCompleted(gestureDescription);Log.d(TAG, "onCompleted: 完成..........");}@Overridepublic void onCancelled(GestureDescription gestureDescription) {super.onCancelled(gestureDescription);Log.d(TAG, "onCompleted: 取消..........");}}, null);}@Overridepublic void onInterrupt() {Toast.makeText(this, "微信抢红包服务已关闭", Toast.LENGTH_SHORT).show();}@Overrideprotected void onServiceConnected() {super.onServiceConnected();Toast.makeText(this, "微信抢红包服务已开启", Toast.LENGTH_SHORT).show();}/*** 模拟返回键*/private void clickBackKey() {performGlobalAction(AccessibilityService.GLOBAL_ACTION_BACK);}@Overridepublic void onDestroy() {super.onDestroy();}
}

ScreenUtils

package sms.example.com.automatic.utils;import android.app.Activity;
import android.content.Context;
import android.view.WindowManager;public class ScreenUtils {/*** 获得屏幕的宽度* @param context* @return*/public static int getWindowsWidth(Context context) {return context.getResources().getDisplayMetrics().widthPixels;}/*** 获得屏幕的高度*/public static int getWindowsHeight(Context context) {return context.getResources().getDisplayMetrics().heightPixels;}
}

创建对应的 xml

res/xml/text_server_config.xml

<?xml version="1.0" encoding="utf-8"?>
<accessibility-servicexmlns:android="http://schemas.android.com/apk/res/android"android:accessibilityEventTypes="typeAllMask"android:accessibilityFeedbackType="feedbackGeneric"android:accessibilityFlags="flagDefault"android:canRetrieveWindowContent="true"android:description="@string/accessibility_description"android:notificationTimeout="10"android:canPerformGestures="true">
</accessibility-service>

上面的属性 description 是在手机系统无障碍中显示的内容。
res/values/strings.xml

<resources><string name="app_name">抢红包</string><string name="accessibility_description">自助抢红包</string>
</resources>

AndroidManifest.xml 注册

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"xmlns:tools="http://schemas.android.com/tools"package="sms.example.com.automatic"><applicationandroid:name=".application.app"android:allowBackup="true"android:icon="@mipmap/ic_launcher"android:label="@string/app_name"android:roundIcon="@mipmap/ic_launcher_round"android:supportsRtl="true"android:theme="@style/AppTheme"><activity android:name=".MainActivity"><intent-filter><action android:name="android.intent.action.MAIN" /><category android:name="android.intent.category.LAUNCHER" /></intent-filter></activity><service android:name=".service.WeChetService"android:permission="android.permission.BIND_ACCESSIBILITY_SERVICE"android:label="@string/accessibility_description"><intent-filter><action android:name="android.accessibilityservice.AccessibilityService" /></intent-filter><meta-dataandroid:name="android.accessibilityservice"android:resource="@xml/text_server_config"/></service></application>
</manifest>

判断服务是否开启

    public static boolean isStartAccessibilityService(Context context, String name) {AccessibilityManager am = (AccessibilityManager) context.getSystemService(Context.ACCESSIBILITY_SERVICE);List<AccessibilityServiceInfo> serviceInfos = am.getEnabledAccessibilityServiceList(AccessibilityServiceInfo.FEEDBACK_GENERIC);for (AccessibilityServiceInfo info : serviceInfos) {String id = info.getId();if (id.contains(name)) {return true;}}return false;}private void isWeChetServiceOpen() {String weChetServiceName = ".service.WeChetService";boolean isWeChetServiceOpen = isStartAccessibilityService(this, weChetServiceName);if (isWeChetServiceOpen) {} else {}}

开启服务

    private void jumpToSettingPage() {Intent intent = new Intent(android.provider.Settings.ACTION_ACCESSIBILITY_SETTINGS);startActivity(intent);}

作者：yuzhiyi_宇
链接：https://www.jianshu.com/p/d9ec1e377892