Android使用WebView实现全屏切换播放网页视频功能

<linearlayout xmlns:android="http://schemas.android.com/apk/res/android"
  xmlns:tools="http://schemas.android.com/tools"
  android:id="@+id/container"
  android:layout_width="fill_parent"
  android:layout_height="fill_parent"
  android:orientation="vertical">
  <framelayout
    android:id="@+id/video_view"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:visibility="gone"
    ></framelayout>
  <button
    android:id="@+id/video_landport"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:text="全屏不显示该按扭，点击切换横屏"
    android:gravity="center"
    />
  <webview
    android:id="@+id/video_webview"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    />
  </linearlayout>

public class mainactivity extends activity {
   private framelayout videoview;// 全屏时视频加载view
  private button videolandport;
  private webview videowebview;
  private boolean islandport = true;//true表示此时是竖屏，false表示此时横屏。
  private view xcustomview;
  private xwebchromeclient xwebchromeclient;
  private string url = "http://look.appjx.cn/mobile_api.php?mod=news&id=12604";
  private webchromeclient.customviewcallback   xcustomviewcallback;
  @override
  protected void oncreate(bundle savedinstancestate) {
    super.oncreate(savedinstancestate);
    requestwindowfeature(window.feature_no_title);//去掉应用标题
    getwindow().setflags(windowmanager.layoutparams.flag_fullscreen,
        windowmanager.layoutparams.flag_fullscreen);
    setcontentview(r.layout.activity_main);
    initwidget();
    initlistener();
    videowebview.loadurl(url);
  }
  private void initlistener() {
    // todo auto-generated method stub
    videolandport.setonclicklistener(new listener());
  }
  private void initwidget() {
    // todo auto-generated method stub
    videoview = (framelayout) findviewbyid(r.id.video_view);
    videolandport = (button) findviewbyid(r.id.video_landport);
    videowebview = (webview) findviewbyid(r.id.video_webview);
    websettings ws = videowebview.getsettings();
    /**
     * setallowfileaccess 启用或禁止webview访问文件数据 setblocknetworkimage 是否显示网络图像
     * setbuiltinzoomcontrols 设置是否支持缩放 setcachemode 设置缓冲的模式
     * setdefaultfontsize 设置默认的字体大小 setdefaulttextencodingname 设置在解码时使用的默认编码
     * setfixedfontfamily 设置固定使用的字体 setjavasciptenabled 设置是否支持javascript
     * setlayoutalgorithm 设置布局方式 setlighttouchenabled 设置用鼠标激活被选项
     * setsupportzoom 设置是否支持变焦
     * */
    ws.setbuiltinzoomcontrols(true);// 隐藏缩放按钮
    ws.setlayoutalgorithm(websettings.layoutalgorithm.narrow_columns);// 排版适应屏幕
    ws.setusewideviewport(true);// 可任意比例缩放
    ws.setloadwithoverviewmode(true);// setusewideviewport方法设置webview推荐使用的窗口。setloadwithoverviewmode方法是设置webview加载的页面的模式。
    ws.setsavepassword(true);
    ws.setsaveformdata(true);// 保存表单数据
    ws.setjavascriptenabled(true);
    ws.setgeolocationenabled(true);// 启用地理定位
    ws.setgeolocationdatabasepath("/data/data/org.itri.html5webview/databases/");// 设置定位的数据库路径
    ws.setdomstorageenabled(true);
    xwebchromeclient = new xwebchromeclient();
    videowebview.setwebchromeclient(xwebchromeclient);
    videowebview.setwebviewclient(new xwebviewclientent());
  }
  class listener implements onclicklistener {
    @override
    public void onclick(view v) {
      // todo auto-generated method stub
      switch (v.getid()) {
      case r.id.video_landport:
        if (islandport) {
          setrequestedorientation(activityinfo.screen_orientation_portrait);
          videolandport.settext("全屏不显示该按扭，点击切换横屏");
        }else {
          setrequestedorientation(activityinfo.screen_orientation_landscape);
          videolandport.settext("全屏不显示该按扭，点击切换竖屏");
        }
        break;
      default:
        break;
      }
    }
  }
    @override
    public boolean onkeydown(int keycode, keyevent event) {
      if (keycode == keyevent.keycode_back) {
        if (incustomview()) {
          hidecustomview();
          return true;
        }else {
        videowebview.loadurl("about:blank");
//          mtestwebview.loaddata("", "text/html; charset=utf-8", null);
        mainactivity.this.finish();
          log.i("testwebview", "===>>>2");
      }
      }
      return true;
    }
    /**
    * 判断是否是全屏
    * @return
    */
    public boolean incustomview() {
       return (xcustomview != null);
     }
     /**
     * 全屏时按返加键执行退出全屏方法
     */
     public void hidecustomview() {
       xwebchromeclient.onhidecustomview();
     }
  /**
   * 处理javascript的对话框、网站图标、网站标题以及网页加载进度等
   * @author
   */
  public class xwebchromeclient extends webchromeclient {
    private bitmap xdefaltvideo;
    private view xprogressvideo;
    @override
    //播放网络视频时全屏会被调用的方法
    public void onshowcustomview(view view, webchromeclient.customviewcallback callback)
    {
      if (islandport) {
      }
      else{
//        ii = "1";
//        setrequestedorientation(activityinfo.screen_orientation_portrait);
      }
      setrequestedorientation(activityinfo.screen_orientation_landscape);
      videowebview.setvisibility(view.gone);
      //如果一个视图已经存在，那么立刻终止并新建一个
      if (xcustomview != null) {
        callback.oncustomviewhidden();
        return;
      }      
      videoview.addview(view);
      xcustomview = view;
      xcustomviewcallback = callback;
      videoview.setvisibility(view.visible);
    }
    @override
    //视频播放退出全屏会被调用的
    public void onhidecustomview() {
      if (xcustomview == null)//不是全屏播放状态
        return;           
      // hide the custom view.
      setrequestedorientation(activityinfo.screen_orientation_portrait);
      xcustomview.setvisibility(view.gone);
      // remove the custom view from its container.
      videoview.removeview(xcustomview);
      xcustomview = null;
      videoview.setvisibility(view.gone);
      xcustomviewcallback.oncustomviewhidden();
      videowebview.setvisibility(view.visible);
      //log.i(logtag, "set it to webvew");
    }
    //视频加载添加默认图标
    @override
    public bitmap getdefaultvideoposter() {
      //log.i(logtag, "here in on getdefaultvideoposter"); 
      if (xdefaltvideo == null) {
        xdefaltvideo = bitmapfactory.decoderesource(
            getresources(), r.drawable.videoicon);
      }
      return xdefaltvideo;
    }
    //视频加载时进程loading
    @override
    public view getvideoloadingprogressview() {
      //log.i(logtag, "here in on getvideoloadingpregressview");
      if (xprogressvideo == null) {
        layoutinflater inflater = layoutinflater.from(mainactivity.this);
        xprogressvideo = inflater.inflate(r.layout.video_loading_progress, null);
      }
      return xprogressvideo;
    }
    //网页标题
     @override
     public void onreceivedtitle(webview view, string title) {
      (mainactivity.this).settitle(title);
     }
//     @override
//    //当webview进度改变时更新窗口进度
//     public void onprogresschanged(webview view, int newprogress) {
//       (mainactivity.this).getwindow().setfeatureint(window.feature_progress, newprogress*100);
//     }   
  }
  /**
   * 处理各种通知、请求等事件
   * @author
   */
  public class xwebviewclientent extends webviewclient {
     @override
      public boolean shouldoverrideurlloading(webview view, string url) {
        log.i("webviewtest", "shouldoverrideurlloading: "+url);
        return false;
      }
  }
  /**
   * 当横竖屏切换时会调用该方法
   * @author
   */
  @override
  public void onconfigurationchanged(configuration newconfig) {
    log.i("testwebview", "=====<<< onconfigurationchanged >>>=====");
     super.onconfigurationchanged(newconfig);
     if(newconfig.orientation == configuration.orientation_landscape){
       log.i("webview", "  现在是横屏1");
       islandport = false;
      }else if(newconfig.orientation == configuration.orientation_portrait){
       log.i("webview", "  现在是竖屏1");
       islandport = true;
      }
  }
}

<uses-permission android:name="android.permission.internet"/>