閱讀這篇文章前，你需要先了解AccessibilityService，可以先閱讀我上一篇文章
微信自動回復和自動搶紅包實現原理（一）：AccessibilityService的介紹和配置
已經了解的朋友可以直接閱讀該文章

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完成AccessibilityService的配置后，好像無從下手。先別急，先打印一些log看看吧。把下面的方法放在onAccessibilityEvent()里：

private void printEventLog(AccessibilityEvent event) {Log.i(TAG, "-------------------------------------------------------------");int eventType = event.getEventType(); //事件類型Log.i(TAG, "PackageName:" + event.getPackageName() + ""); // 響應事件的包名Log.i(TAG, "Source Class:" + event.getClassName() + ""); // 事件源的類名Log.i(TAG, "Description:" + event.getContentDescription()+ ""); // 事件源描述Log.i(TAG, "Event Type(int):" + eventType + "");switch (eventType) {case AccessibilityEvent.TYPE_NOTIFICATION_STATE_CHANGED:// 通知欄事件Log.i(TAG, "event type:TYPE_NOTIFICATION_STATE_CHANGED");break;case AccessibilityEvent.TYPE_WINDOW_STATE_CHANGED://窗體狀態改變Log.i(TAG, "event type:TYPE_WINDOW_STATE_CHANGED");break;case AccessibilityEvent.TYPE_VIEW_ACCESSIBILITY_FOCUSED://View獲取到焦點Log.i(TAG, "event type:TYPE_VIEW_ACCESSIBILITY_FOCUSED");break;case AccessibilityEvent.TYPE_GESTURE_DETECTION_START:Log.i(TAG, "event type:TYPE_VIEW_ACCESSIBILITY_FOCUSED");break;case AccessibilityEvent.TYPE_GESTURE_DETECTION_END:Log.i(TAG, "event type:TYPE_GESTURE_DETECTION_END");break;case AccessibilityEvent.TYPE_WINDOW_CONTENT_CHANGED:Log.i(TAG, "event type:TYPE_WINDOW_CONTENT_CHANGED");break;case AccessibilityEvent.TYPE_VIEW_CLICKED:Log.i(TAG, "event type:TYPE_VIEW_CLICKED");break;case AccessibilityEvent.TYPE_VIEW_TEXT_CHANGED:Log.i(TAG, "event type:TYPE_VIEW_TEXT_CHANGED");break;case AccessibilityEvent.TYPE_VIEW_SCROLLED:Log.i(TAG, "event type:TYPE_VIEW_SCROLLED");break;case AccessibilityEvent.TYPE_VIEW_TEXT_SELECTION_CHANGED:Log.i(TAG, "event type:TYPE_VIEW_TEXT_SELECTION_CHANGED");break;default:Log.i(TAG, "no listen event");}for (CharSequence txt : event.getText()) {Log.i(TAG, "text:" + txt);}Log.i(TAG, "-------------------------------------------------------------");}

向安裝了服務的手機發微信信息，查看打印的log：

非鎖屏(在后臺): ------------------------------------------------------------- packageName:com.tencent.mm source:null source class:android.app.Notification event type(int):64 event type:TYPE_NOTIFICATION_STATE_CHANGED text:[聯系人]: 哦 ------------------------------------------------------------- 非鎖屏(在前臺主界面): ------------------------------------------------------------- packageName:com.tencent.mm source:android.view.accessibility.AccessibilityNodeInfo@8009b539; boundsInParent: Rect(0, 0 - 38, 38); boundsInScreen: Rect(103, 1181 - 141, 1219); packageName: com.tencent.mm; className: android.widget.TextView; text: 1; error: null; maxTextLength: -1; contentDescription: null; viewIdResName: null; checkable: false; checked: false; focusable: false; focused: false; selected: false; clickable: false; longClickable: false; enabled: true; password: false; scrollable: false; actions: [AccessibilityAction: ACTION_SELECT - null, AccessibilityAction: ACTION_CLEAR_SELECTION - null, AccessibilityAction: ACTION_ACCESSIBILITY_FOCUS - null, AccessibilityAction: ACTION_NEXT_AT_MOVEMENT_GRANULARITY - null, AccessibilityAction: ACTION_PREVIOUS_AT_MOVEMENT_GRANULARITY - null, AccessibilityAction: ACTION_SET_SELECTION - null] source class:android.widget.TextView event type(int):2048 event type:TYPE_WINDOW_CONTENT_CHANGED ------------------------------------------------------------- ------------------------------------------------------------- packageName:com.tencent.mm source:null source class:android.app.Notification event type(int):64 event type:TYPE_NOTIFICATION_STATE_CHANGED text:[聯系人]: 呵呵 ------------------------------------------------------------- ------------------------------------------------------------- packageName:com.tencent.mm source:android.view.accessibility.AccessibilityNodeInfo@80043582; boundsInParent: Rect(0, 0 - 38, 38); boundsInScreen: Rect(96, 153 - 134, 191); packageName: com.tencent.mm; className: android.widget.TextView; text: 1; error: null; maxTextLength: -1; contentDescription: null; viewIdResName: null; checkable: false; checked: false; focusable: false; focused: false; selected: false; clickable: false; longClickable: false; enabled: true; password: false; scrollable: false; actions: [AccessibilityAction: ACTION_SELECT - null, AccessibilityAction: ACTION_CLEAR_SELECTION - null, AccessibilityAction: ACTION_ACCESSIBILITY_FOCUS - null, AccessibilityAction: ACTION_NEXT_AT_MOVEMENT_GRANULARITY - null, AccessibilityAction: ACTION_PREVIOUS_AT_MOVEMENT_GRANULARITY - null, AccessibilityAction: ACTION_SET_SELECTION - null] source class:android.widget.TextView event type(int):2048 event type:TYPE_WINDOW_CONTENT_CHANGED ------------------------------------------------------------- 非鎖屏(在前臺打開會話人的界面)(沒Notification) ------------------------------------------------------------- packageName:com.tencent.mm source:android.view.accessibility.AccessibilityNodeInfo@8009cbbf; boundsInParent: Rect(0, 0 - 720, 1038); boundsInScreen: Rect(0, 146 - 720, 1184); packageName: com.tencent.mm; className: android.widget.ListView; text: null; error: null; maxTextLength: -1; contentDescription: null; viewIdResName: null; checkable: false; checked: false; focusable: true; focused: false; selected: false; clickable: true; longClickable: true; enabled: true; password: false; scrollable: true; actions: [AccessibilityAction: ACTION_FOCUS - null, AccessibilityAction: ACTION_SELECT - null, AccessibilityAction: ACTION_CLEAR_SELECTION - null, AccessibilityAction: ACTION_CLICK - null, AccessibilityAction: ACTION_LONG_CLICK - null, AccessibilityAction: ACTION_ACCESSIBILITY_FOCUS - null, AccessibilityAction: ACTION_SCROLL_BACKWARD - null] source class:android.widget.ListView event type(int):2048 event type:TYPE_WINDOW_CONTENT_CHANGED ------------------------------------------------------------- ------------------------------------------------------------- packageName:com.tencent.mm source:android.view.accessibility.AccessibilityNodeInfo@801086ca; boundsInParent: Rect(0, 0 - 415, 80); boundsInScreen: Rect(201, 146 - 616, 150); packageName: com.tencent.mm; className: android.widget.TextView; text: 我在敲代碼，稍后回復哈~; error: null; maxTextLength: -1; contentDescription: null; viewIdResName: null; checkable: false; checked: false; focusable: false; focused: false; selected: false; clickable: true; longClickable: true; enabled: true; password: false; scrollable: false; actions: [AccessibilityAction: ACTION_SELECT - null, AccessibilityAction: ACTION_CLEAR_SELECTION - null, AccessibilityAction: ACTION_CLICK - null, AccessibilityAction: ACTION_LONG_CLICK - null, AccessibilityAction: ACTION_ACCESSIBILITY_FOCUS - null, AccessibilityAction: ACTION_NEXT_AT_MOVEMENT_GRANULARITY - null, AccessibilityAction: ACTION_PREVIOUS_AT_MOVEMENT_GRANULARITY - null, AccessibilityAction: ACTION_SET_SELECTION - null] source class:android.widget.TextView event type(int):2048 event type:TYPE_WINDOW_CONTENT_CHANGED ------------------------------------------------------------- ------------------------------------------------------------- packageName:com.tencent.mm source:android.view.accessibility.AccessibilityNodeInfo@8009cbbf; boundsInParent: Rect(0, 0 - 720, 1038); boundsInScreen: Rect(0, 146 - 720, 1184); packageName: com.tencent.mm; className: android.widget.ListView; text: null; error: null; maxTextLength: -1; contentDescription: null; viewIdResName: null; checkable: false; checked: false; focusable: true; focused: false; selected: false; clickable: true; longClickable: true; enabled: true; password: false; scrollable: true; actions: [AccessibilityAction: ACTION_FOCUS - null, AccessibilityAction: ACTION_SELECT - null, AccessibilityAction: ACTION_CLEAR_SELECTION - null, AccessibilityAction: ACTION_CLICK - null, AccessibilityAction: ACTION_LONG_CLICK - null, AccessibilityAction: ACTION_ACCESSIBILITY_FOCUS - null, AccessibilityAction: ACTION_SCROLL_BACKWARD - null] source class:android.widget.ListView event type(int):4096 event type:TYPE_VIEW_SCROLLED ------------------------------------------------------------- 非鎖屏(在前臺打開非會話人的界面): ------------------------------------------------------------- packageName:com.tencent.mm source:android.view.accessibility.AccessibilityNodeInfo@800ce011; boundsInParent: Rect(0, 0 - 95, 80); boundsInScreen: Rect(104, 851 - 199, 931); packageName: com.tencent.mm; className: android.widget.TextView; text: [白眼]; error: null; maxTextLength: -1; contentDescription: null; viewIdResName: null; checkable: false; checked: false; focusable: false; focused: false; selected: false; clickable: true; longClickable: true; enabled: true; password: false; scrollable: false; actions: [AccessibilityAction: ACTION_SELECT - null, AccessibilityAction: ACTION_CLEAR_SELECTION - null, AccessibilityAction: ACTION_CLICK - null, AccessibilityAction: ACTION_LONG_CLICK - null, AccessibilityAction: ACTION_ACCESSIBILITY_FOCUS - null, AccessibilityAction: ACTION_NEXT_AT_MOVEMENT_GRANULARITY - null, AccessibilityAction: ACTION_PREVIOUS_AT_MOVEMENT_GRANULARITY - null, AccessibilityAction: ACTION_SET_SELECTION - null] source class:android.widget.TextView event type(int):2048 event type:TYPE_WINDOW_CONTENT_CHANGED ------------------------------------------------------------- ------------------------------------------------------------- packageName:com.tencent.mm source:null source class:android.app.Notification event type(int):64 event type:TYPE_NOTIFICATION_STATE_CHANGED text:[聯系人]: 呵呵 ------------------------------------------------------------- ------------------------------------------------------------- packageName:com.tencent.mm source:android.view.accessibility.AccessibilityNodeInfo@8012f5f0; boundsInParent: Rect(0, 0 - 371, 60); boundsInScreen: Rect(174, 591 - 545, 651); packageName: com.tencent.mm; className: android.widget.TextView; text: "?彣????" 撤回了一條消息; error: null; maxTextLength: -1; contentDescription: null; viewIdResName: null; checkable: false; checked: false; focusable: false; focused: false; selected: false; clickable: true; longClickable: false; enabled: true; password: false; scrollable: false; actions: [AccessibilityAction: ACTION_SELECT - null, AccessibilityAction: ACTION_CLEAR_SELECTION - null, AccessibilityAction: ACTION_CLICK - null, AccessibilityAction: ACTION_ACCESSIBILITY_FOCUS - null, AccessibilityAction: ACTION_NEXT_AT_MOVEMENT_GRANULARITY - null, AccessibilityAction: ACTION_PREVIOUS_AT_MOVEMENT_GRANULARITY - null, AccessibilityAction: ACTION_SET_SELECTION - null] source class:android.widget.TextView event type(int):2048 event type:TYPE_WINDOW_CONTENT_CHANGED -------------------------------------------------------------

從打印的log和我們平時使用微信應該就知道的了，除了在打開了會話人的聊天界面，否則都會有Notification的，可以以此作為切入點，那么接下來我們的工作就簡單了。步驟如下：

監聽TYPE_NOTIFICATION_STATE_CHANGED事件

根據Notification打開會話人聊天界面

搜索輸入框控件

在輸入框輸入回復文本

點擊發送按鈕

返回微信主界面

思路很清晰了，難點是如何找到相應的控件。放心，Android也為我們提供了一個類來幫助我們——AccessibilityNodeInfo?，其包含一些控件的信息，可用其找到相應的控件，并做出相應的操作。常用方法：

- CharSequence getClassName () // 獲取控件類名，如按鈕會返回android.widget.Button - CharSequence getText () // 獲取控件的文本，如微信的發送按鈕會返回“發送” - String getViewIdResourceName () // 獲取控件的id

代碼注釋很詳細了，就不一一解釋。源碼后面有貼。

/*** 自動回復服務*/ public class AutoReplyService extends AccessibilityService{private static final String TAG = AutoReplyService.class.getSimpleName();private Handler handler = new Handler();private boolean hasNotify = false;/*** 必須重寫的方法，響應各種事件。*/@Overridepublic void onAccessibilityEvent(final AccessibilityEvent event) { int eventType = event.getEventType(); // 事件類型switch (eventType) {case AccessibilityEvent.TYPE_NOTIFICATION_STATE_CHANGED: // 通知欄事件Log.i(TAG, "TYPE_NOTIFICATION_STATE_CHANGED");if(PhoneController.isLockScreen(this)) { // 鎖屏PhoneController.wakeAndUnlockScreen(this); // 喚醒點亮屏幕}openAppByNotification(event);hasNotify = true;break;default:Log.i(TAG, "DEFAULT");if (hasNotify) { // 如果有通知try {Thread.sleep(1000); // 停1秒, 否則在微信主界面沒進入聊天界面就執行了fillInputBar} catch (InterruptedException e) {e.printStackTrace();}if (fillInputBar("我在敲代碼，稍后回復哈~")) { // 找到輸入框，即EditTextfindAndPerformAction(UI.BUTTON, "發送"); // 點擊發送handler.postDelayed(new Runnable() { // 返回主界面，這里延遲執行，為了有更好的交互@Overridepublic void run() {performGlobalAction(AccessibilityService.GLOBAL_ACTION_BACK); // 返回}}, 1500);}hasNotify = false;}break;}}@Overridepublic void onInterrupt() {}/*** 查找UI控件并點擊* @param widget 控件完整名稱, 如android.widget.Button, android.widget.TextView* @param text 控件文本*/private void findAndPerformAction(String widget, String text) {// 取得當前激活窗體的根節點if (getRootInActiveWindow() == null) {return;}// 通過文本找到當前的節點List<AccessibilityNodeInfo> nodes = getRootInActiveWindow().findAccessibilityNodeInfosByText(text);if(nodes != null) {for (AccessibilityNodeInfo node : nodes) {if (node.getClassName().equals(widget) && node.isEnabled()) {node.performAction(AccessibilityNodeInfo.ACTION_CLICK); // 執行點擊break;}}}}/*** 打開微信* @param event 事件*/private void openAppByNotification(AccessibilityEvent event) {if (event.getParcelableData() != null && event.getParcelableData() instanceof Notification) {Notification notification = (Notification) event.getParcelableData();try {PendingIntent pendingIntent = notification.contentIntent;pendingIntent.send();} catch (PendingIntent.CanceledException e) {e.printStackTrace();}}}/*** 填充輸入框*/private boolean fillInputBar(String reply) {AccessibilityNodeInfo rootNode = getRootInActiveWindow();if (rootNode != null) {return findInputBar(rootNode, reply);}return false;}/*** 查找EditText控件* @param rootNode 根結點* @param reply 回復內容* @return 找到返回true, 否則返回false*/private boolean findInputBar(AccessibilityNodeInfo rootNode, String reply) {int count = rootNode.getChildCount();for (int i = 0; i < count; i++) {AccessibilityNodeInfo node = rootNode.getChild(i);if (UI.EDITTEXT.equals(node.getClassName())) { // 找到輸入框并輸入文本setText(node, reply);return true;}if (findInputBar(node, reply)) { // 遞歸查找return true;}}return false;}/*** 設置文本*/private void setText(AccessibilityNodeInfo node, String reply) {if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {Bundle args = new Bundle();args.putCharSequence(AccessibilityNodeInfo.ACTION_ARGUMENT_SET_TEXT_CHARSEQUENCE,reply);node.performAction(AccessibilityNodeInfo.ACTION_SET_TEXT, args);} else {ClipData data = ClipData.newPlainText("reply", reply);ClipboardManager clipboardManager = (ClipboardManager) getSystemService(Context.CLIPBOARD_SERVICE);clipboardManager.setPrimaryClip(data);node.performAction(AccessibilityNodeInfo.ACTION_FOCUS); // 獲取焦點node.performAction(AccessibilityNodeInfo.ACTION_PASTE); // 執行粘貼}} }

這里我沒有處理打開了會話人聊天界面的情況，我覺得你都打開了會話人的聊天界面，就證明你想與他聊天，也就不需要自動回復了。當然，如果你遍要（不帶你這樣敷衍朋友的），只要加點簡單邏輯就可以實現了~到這里微信自動回復功能就完成了，怎樣，是不是很簡單！感興趣的朋友可以繼續看我下一篇文章：
微信自動回復和自動搶紅包實現原理（三）：自動搶紅包

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源碼下載

原文地址: http://www.jianshu.com/p/5b4a4a5aca7e

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