Android使用WebView实现全屏切换播放网页视频功能

首先写布局文件activity_main.xml：

<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>

　　原理：实现全屏的时候把webview里的视频放到一个View（布局里的video_view控件）里面，然后把webview隐藏掉！这样就实现了全屏播放的！

现在具体来看看怎么实现的:

先放代码MainActivity.java：

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;
      }
  }
}

　　最后说下AndroidManifest.xml设置;
访问网络权限加上这句

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

当切换横竖屏时为了不重新调用onCreate等方法，要加个这句：

android:configChanges="orientation|keyboardHidden|screenSize"

总结

以上所述是小编给大家介绍的Android使用WebView实现全屏切换播放网页视频功能，希望对大家有所帮助，如果大家有任何疑问欢迎给我留言，小编会及时回复大家的！