Cordova 后退按钮在使用自己的插件后销毁 CordovaActivity

Posted 2023-05-06

【中文标题】Cordova 后退按钮在使用自己的插件后销毁 CordovaActivity

【英文标题】：Cordova backbutton destroy the CordovaActivity after use own plugin

【发布时间】：2018-01-02 21:16:03

【问题描述】：

我开发了一个cordova插件，可以为pdf创建一个文件容器。我的插件有enterFullscreen() 和exitFUllscreen() 的功能。如果我切换到全屏并想要返回默认文件容器，我想为此使用后退按钮，但如果我按下后退按钮，应用程序将关闭。在我的 logcat 中，我收到以下消息：

这是我的插件代码：java

/**
 * Enters the fullscreen mode of a Container.
 *
 * @param Container _container The Container which should enter the fullscreen mode.
 * @param boolean _enableFullscreen True for enabling fullscreen mode, false for disabling.
 */
private void setContainerFullscreen(final Container _container,final boolean _enableFullscreen)

    Log.d(LOGTAG,"FileViewer -> enterFullscreen of container with id: " + _container.id());

    this.cordova.getActivity().runOnUiThread(new Runnable()
    
        @Override
        public void run()
        
            _container.enableFullscreen(_enableFullscreen);

            FrameLayout containerLayout = _container.containerFrameLayout();

            /* first we must call removeView() then addView(), because the updateView() function don't work with fullscreen mode.
            //todo I must check this later.
            call a exception.*/
            mainLayout.removeView(containerLayout);
            mainLayout.addView(containerLayout,containerLayout.getLayoutParams());
        
    );

这里是容器类

/**
 * Enables fullscreen mode for this Container.
 *
 * @param boolean _enable True for enabling fullscreen mode, false for disabling.
 */
public void enableFullscreen(boolean _enable)

    this.isFullscreen = _enable;

    if (this.isFullscreen && this.isVisible)
       // Sets the size of the parentlayout to fullscreen.
        this.containerFrameLayout.setLayoutParams(mainLayout.getLayoutParams());
        this.enableToolbar(true);
    
    else if (!this.isFullscreen && this.isVisible)
       // Sets the size back to the values before it went into fullscreen mode.
        FrameLayout.LayoutParams layoutParams = new FrameLayout.LayoutParams(this.containerRect.right-this.containerRect.left,this.containerRect.bottom-this.containerRect.top);
        layoutParams.leftMargin = this.containerRect.left;
        layoutParams.topMargin = this.containerRect.top;
        layoutParams.gravity = 0;

        this.containerFrameLayout.setLayoutParams(layoutParams);
        this.enableToolbar(false);
    

这里是javascript代码：

// backbutton support for android in fullscreen mode
document.addEventListener("backbutton", Ext.bind(function(_event)
    if (this.fullScreen)
    
        //console.log("We are in fullscreen!");
        this.fileViewerPlugin.exitFullscreen();
        this.fullScreen=false;
        _event.preventDefault();
    
    else
    
        navigator.app.exitApp();
    
,this), false);

【参考方案1】：

您看到的是back-button 的原始行为。您应该使用 override 这种行为，例如使用 this guide。

【讨论】：

我在我的 javascript 中这样做