中国大学MOOC Android 客户端开发提效之页面信息

// windowsadb shell dumpsys window windows | Select-String -Pattern 'mCurrentFocus|mFocusedApp|mLastOpeningApp|mObscuringWindow'  // Macadb shell dumpsys window windows | grep -E 'mCurrentFocus|mFocusedApp|mLastOpeningApp'

    private static Activity topActivity;    @Override    public void onActivityResumed(Activity activity) {        topActivity = activity;    }

@Override    public void onAccessibilityEvent(AccessibilityEvent event) {        Log.d(TAG, "onAccessibilityEvent");        if (event.getEventType() == AccessibilityEvent.TYPE_WINDOW_STATE_CHANGED) {            if (event.getPackageName() != null && event.getClassName() != null) {                ComponentName componentName = new ComponentName(                        event.getPackageName().toString(),                        event.getClassName().toString()                );                ActivityInfo activityInfo = tryGetActivity(componentName);                boolean isActivity = activityInfo != null;                if (isActivity) {                    Log.d(TAG, "CurentActivity " + componentName.flattenToShortString());                    Log.d(TAG, "CurentActivity " + event.getPackageName().toString());                }            }        }    }private ActivityInfo tryGetActivity(ComponentName componentName) {        try {            return getPackageManager().getActivityInfo(componentName, 0);        } catch (PackageManager.NameNotFoundException e) {            return null;        }    }

<service            android:name=".WindowChangeDetectingService"            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/accessibilityservice"/>        </service>

<?xml version="1.0" encoding="utf-8"?><!-- These options MUST be specified here in order for the events to be received on first start in Android 4.1.1 --><accessibility-service    xmlns:tools="http://schemas.android.com/tools"    android:accessibilityEventTypes="typeWindowStateChanged"    android:accessibilityFeedbackType="feedbackGeneric"    android:accessibilityFlags="flagIncludeNotImportantViews"    android:canRetrieveWindowContent="true"    android:description="@string/accessibility_service_description"    xmlns:android="http://schemas.android.com/apk/res/android"    tools:ignore="UnusedAttribute"/>

topActivity.getIntent().getExtras();// 获得 activity 的页面参数topActivity.getSupportFragmentManager().getFragments(); // 获得 activity 一级中的 fragmentsfragment.getChildFragmentManager().getFragments();// 对应 fragment 中的 fragmentsfragment.getArguments() // 获得 fragment的页面参数