Question

我知道可以覆盖Android中的Back Button功能，但我想知道是否有一个方法或任何我可以调用的功能与按下硬件按钮相同的功能。

Answer 1

您可以按下后退按钮发送到系统

this.dispatchKeyEvent(new KeyEvent(KeyEvent.ACTION_DOWN, KeyEvent.KEYCODE_BACK));

或者你可以按下后退按钮并按下

finish();

关于您的活动。这基本上与通用后退按钮完全相同。

Answer 2

只需在活动中调用this.onBackPressed();。

Answer 3

如果你只想“按下”硬件按钮，创建从AccessibilityService扩展的服务：

class ExampleAccessService:AccessibilityService() {
    override fun onInterrupt() {
    }

    override fun onAccessibilityEvent(event: AccessibilityEvent?) {
    }

    fun doAction(){
        performGlobalAction(GLOBAL_ACTION_RECENTS)
//        performGlobalAction(GLOBAL_ACTION_BACK)
//        performGlobalAction(GLOBAL_ACTION_HOME)
//        performGlobalAction(GLOBAL_ACTION_NOTIFICATIONS)
//        performGlobalAction(GLOBAL_ACTION_POWER_DIALOG)
//        performGlobalAction(GLOBAL_ACTION_QUICK_SETTINGS)
//        performGlobalAction(GLOBAL_ACTION_TOGGLE_SPLIT_SCREEN)
    }
}

致电您需要采取行动的doAction()

添加到Manifest：

<application
...
    <service
        android:name=".ExampleAccessService"
        android:permission="android.permission.BIND_ACCESSIBILITY_SERVICE"
        android:label="Name of servise" // it will be viewed in Settings->Accessibility->Services
        android:enabled="true"
        android:exported="false" >
        <intent-filter>
            <action android:name="android.accessibilityservice.AccessibilityService"/>
        </intent-filter>
        <meta-data
            android:name="android.accessibilityservice"
            android:resource="@xml/accessibility_service_config"/>
    </service>
...
</application>

<强> accessibility_service_config.xml：

<?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="false"
    android:description="your description"
    android:notificationTimeout="100"
    android:packageNames="your app package, ex: ex: com.example.android"
    android:settingsActivity="your settings activity ex: com.example.android.MainActivity" />

了解更多信息，请查看https://developer.android.com/guide/topics/ui/accessibility/services.html

以编程方式调用硬件返回按钮？

3 个答案: