Android 辅助功能 -抢红包

本篇文章主要介绍下通过android辅助功能的方式来实现类似抢红包的功能.

1:权限声明

<uses-permissionandroid:name="android.permission.BIND_ACCESSIBILITY_SERVICE"tools:ignore="ProtectedPermissions" />

2: 配置信息

xml目录下创建如下文件:

<?xml version="1.0" encoding="utf-8"?>
<accessibility-service xmlns:android="http://schemas.android.com/apk/res/android"android:accessibilityEventTypes="typeAllMask"android:accessibilityFeedbackType="feedbackAllMask"android:accessibilityFlags="flagDefault"android:canRetrieveWindowContent="true"android:canRequestFilterKeyEvents="true"android:description="@string/desc"android:packageNames= "com.test.redpacket">
</accessibility-service>

android:accessibilityEventTypes 定义服务要监听的事件类型
android:accessibilityFeedbackType 定义了服务的反馈类型
android:accessibilityFlags 定义服务的行为标志
android:description 描述信息 (需要使用资源文件配置)
android:canRetrieveWindowContent 定义了服务是否可以获取窗口内容
android:packageNames定义了监听的包名

3: 自定义AccessibilityService

具体的代码如下:

public class RedPacketAccessibilityService extends AccessibilityService {private static final String TAG = "RedPacketAccessibilityService";@SuppressLint("LongLogTag")@Overridepublic void onAccessibilityEvent(AccessibilityEvent event) {int action = event.getAction();Log.i(TAG, "onAccessibilityEvent: " + action);CharSequence packageName = event.getPackageName();Log.i(TAG, "onAccessibilityEvent: " + packageName);AccessibilityNodeInfo rootInActiveWindow = getRootInActiveWindow();if (rootInActiveWindow != null) {List<AccessibilityNodeInfo> nodeInfos = rootInActiveWindow.findAccessibilityNodeInfosByText("红包:恭喜发财");if (nodeInfos != null) {for (AccessibilityNodeInfo nodeInfo : nodeInfos) {nodeInfo.performAction(AccessibilityNodeInfo.ACTION_CLICK);}}}}@Overridepublic void onInterrupt() {}
}

此处通过findAccessibilityNodeInfosByText来查找节点了, 我们还可以使用 findAccessibilityNodeInfosByViewId来实现.

4: 服务声明

在manifest.xml中声明服务.

<serviceandroid:name=".RedPacketAccessibilityService"android:permission="android.permission.BIND_ACCESSIBILITY_SERVICE"><intent-filter><action android:name="android.accessibilityservice.AccessibilityService" /></intent-filter><meta-dataandroid:name="android.accessibilityservice"android:resource="@xml/acc" />
</service>

5: 测试代码

public class MainActivity extends AppCompatActivity {private Button btnSend;private TextView tvMsg;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);btnSend=findViewById(R.id.btn_send);tvMsg=findViewById(R.id.tv_msg);Intent serviceIntent = new Intent(this, RedPacketAccessibilityService.class);startService(serviceIntent);btnSend.setOnClickListener(v -> {tvMsg.setText("红包:恭喜发财");});tvMsg.setOnClickListener(v -> {tvMsg.setText("消息展示");Toast.makeText(MainActivity.this,"抢红包",Toast.LENGTH_SHORT).show();});}
}