[Android Studio] 輔助功能服務AccessibilityService - 點擊Toast顯示介面上任何檔案的名稱

這樣的事件表示用戶界面中的一些狀態轉換，例如焦點已經改變，按鈕被點擊等。

一、AndroidManifest.xml再application裡加入以下內容：

<service
            android:name="AccessibilityService檔案名稱，例.UN"
            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/accessible_service_config" />

</service>





二、xml檔與AccessibilityService檔案內容，例.UN：

<?xml version="1.0" encoding="utf-8"?><accessibility-service xmlns:android="http://schemas.android.com/apk/res/android"    android:description="@string/accessibility_service_description"    android:packageNames="com.example.hmlong.accessibilityservices"    android:accessibilityEventTypes="typeViewClicked|typeViewFocused"    android:accessibilityFeedbackType="feedbackSpoken"    android:settingsActivity="com.example.android.apis.accessibility.TestBackActivity"    android:notificationTimeout="100"    android:canRetrieveWindowContent="true"/>

package com.example.fan.bg;

import android.accessibilityservice.AccessibilityService;
import android.accessibilityservice.AccessibilityServiceInfo;
import android.view.accessibility.AccessibilityEvent;
import android.widget.Toast;

public class UN extends AccessibilityService {

    @Override    public void onAccessibilityEvent(AccessibilityEvent accessibilityEvent) {

        final int eventType=accessibilityEvent.getEventType();
        String eventText = null;
        switch(eventType){
            case AccessibilityEvent.TYPE_VIEW_CLICKED: //代表喀噠上的事件View一樣 Button，CompoundButton等等。                eventText="顯示：";
                break;
            case AccessibilityEvent.TYPE_VIEW_FOCUSED: //表示設置a的輸入焦點事件View。                eventText="顯示2：";
                break;

        }
        eventText=eventText + accessibilityEvent.getContentDescription();
        Toast.makeText(getApplicationContext(),eventText,Toast.LENGTH_LONG).show();
        }

    @Override    public void onInterrupt() {
//(required) 這個在系統想要中斷AccessibilityService返給的響應時會調用。在整個生命週期裡會被調用多次。
    }

    @Override    protected void onServiceConnected() {
        AccessibilityServiceInfo info =new AccessibilityServiceInfo();
        info.eventTypes=AccessibilityEvent.TYPE_VIEW_CLICKED|AccessibilityEvent.TYPE_VIEW_FOCUSED;
        info.feedbackType=AccessibilityServiceInfo.FEEDBACK_SPOKEN;
        info.notificationTimeout=30;
        this.setServiceInfo(info);
    }


    //調用前台名稱    public void isForeground() {

    }
}

三、layout內容

<?xml version="1.0" encoding="utf-8"?><android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:app="http://schemas.android.com/apk/res-auto"    xmlns:tools="http://schemas.android.com/tools"    android:layout_width="match_parent"    android:layout_height="match_parent"    tools:context=".MainActivity">


    <LinearLayout        android:layout_width="match_parent"        android:layout_height="match_parent"        android:orientation="vertical">

        <TextView            android:layout_width="match_parent"            android:layout_height="wrap_content"            android:text="Hello World!"            app:layout_constraintBottom_toBottomOf="parent"            app:layout_constraintHorizontal_bias="0.324"            app:layout_constraintLeft_toLeftOf="parent"            app:layout_constraintRight_toRightOf="parent"            app:layout_constraintTop_toTopOf="parent" />

        <Button            android:id="@+id/button"            android:layout_width="match_parent"            android:layout_height="wrap_content"            android:contentDescription="@string/right"←按了會顯示在Toast上
            android:text="@string/right"            tools:ignore="MissingConstraints"            tools:layout_editor_absoluteX="232dp"            tools:layout_editor_absoluteY="145dp" />

        <Button            android:id="@+id/button2"            android:layout_width="match_parent"            android:layout_height="wrap_content"            android:contentDescription="@string/left"←按了會顯示在Toast上
            android:text="@string/left"            tools:ignore="MissingConstraints"            tools:layout_editor_absoluteX="88dp"            tools:layout_editor_absoluteY="145dp" />
    </LinearLayout>

</android.support.constraint.ConstraintLayout>

三、判斷輔助服務是否開啟的語法

String TAG="輔助功能";
@Overrideprotected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    openAccessibility(this);//判斷是否開啟


}

private boolean isAccessibilitySettingsOn(Context mContext) {
    int accessibilityEnabled = 0;
    // TestService为对应的服务    final String service = getPackageName() + "/" +[ AccessibilityService檔案內容，例.UN].class.getCanonicalName();;
    Log.i(TAG, "service:" + service);
    try {
        accessibilityEnabled = Settings.Secure.getInt(mContext.getApplicationContext().getContentResolver(),
                android.provider.Settings.Secure.ACCESSIBILITY_ENABLED);
        Log.v(TAG, "accessibilityEnabled = " + accessibilityEnabled);
    } catch (Settings.SettingNotFoundException e) {
        Log.e(TAG, "查找設置時出錯，默認可訪問性未找到: " + e.getMessage());
    }
    TextUtils.SimpleStringSplitter mStringColonSplitter = new TextUtils.SimpleStringSplitter(':');

    if (accessibilityEnabled == 1) {
        Log.v(TAG, "***可用性已啟用*** -----------------");
        String settingValue = Settings.Secure.getString(mContext.getApplicationContext().getContentResolver(),
                Settings.Secure.ENABLED_ACCESSIBILITY_SERVICES);
        if (settingValue != null) {
            mStringColonSplitter.setString(settingValue);
            while (mStringColonSplitter.hasNext()) {
                String accessibilityService = mStringColonSplitter.next();

                Log.v(TAG, "-------------- > accessibilityService :: " + accessibilityService + " " + service);
                if (accessibilityService.equalsIgnoreCase(service)) {
                    Log.v(TAG, "我們找到了正確的設置 - 輔助功能已打開！");
                    return true;
                }
            }
        }
    } else {
        Log.v(TAG, "***可訪問性被禁用***");
    }
    return false;
}

private void openAccessibility(Context context){
    if (!isAccessibilitySettingsOn(context)) {
        Intent intent = new Intent(Settings.ACTION_ACCESSIBILITY_SETTINGS);
        startActivity(intent);
    }
}

資料來源：https://developer.android.com/reference/android/accessibilityservice/AccessibilityService

https://developer.android.com/reference/android/view/accessibility/AccessibilityEventhttps://developer.android.com/training/accessibility/service