如何让WebView中H5页面全屏播放视频。关于这个问题，做一下简单分析，希望对你有所帮助。

和往常一样，我们先来看效果

运行效果

其实很简单，就是配置问题。关键地方配好了，基本没什么问题了。

• 硬件加速
• 设置WebView

在清单需要配置的AndroidManifest.xml

<application
    android:allowBackup="true"
    android:icon="@mipmap/ic_launcher"
    android:label="@string/app_name"
    android:supportsRtl="true"
    android:theme="@style/AppTheme">
    <activity
        android:name=".WebViewActivity"
        android:configChanges="orientation|screenSize|keyboardHidden"
        android:hardwareAccelerated="true">
        <intent-filter>
          <action android:name="android.intent.action.MAIN" />
          <category android:name="android.intent.category.LAUNCHER" />
        </intent-filter>
    </activity>
</application>

这里需要注意的是启动硬件加速可以 在application 启动这个硬件加速，也可以在对应的activity启动

android:hardwareAccelerated="true"

还有这个

configChanges="orientation|screenSize|keyboardHidden"

必须是

orientation|screenSize|keyboardHidden

当然记得加上网络权限

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

下面给出全部源码

activity_webview.xml

<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/mFrameLayout"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <WebView
        android:id="@+id/mWebView"
        android:layout_width="match_parent"
        android:layout_height="match_parent" />
</FrameLayout>

WebViewActivity源码

public class WebViewActivity extends AppCompatActivity  {
    private FrameLayout mFrameLayout;
    private WebView mWebView;
    private MyWebChromeClient mMyWebChromeClient;
    private String URL = "http://m.tv.sohu.com/20130704/n380744170.shtml";
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        requestWindowFeature(Window.FEATURE_NO_TITLE);
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_webview);
        mFrameLayout = (FrameLayout) findViewById(R.id.mFrameLayout);
        mWebView = (WebView) findViewById(R.id.mWebView);
        initWebView();
        mWebView.loadUrl(URL);
    }
    private void initWebView() {
        WebSettings settings = mWebView.getSettings();
        settings.setJavaScriptEnabled(true);
        settings.setJavaScriptCanOpenWindowsAutomatically(true);
        settings.setPluginState(WebSettings.PluginState.ON);
        settings.setAllowFileAccess(true);
        settings.setLoadWithOverviewMode(true);
        settings.setUseWideViewPort(true);
        settings.setCacheMode(WebSettings.LOAD_NO_CACHE);
        settings.setCacheMode(WebSettings.LOAD_DEFAULT);
        mMyWebChromeClient = new MyWebChromeClient();
        mWebView.setWebChromeClient(mMyWebChromeClient);
        mWebView.setWebViewClient(new WebViewClient() {
            public boolean shouldOverrideUrlLoading(WebView view, String url) {
                view.loadUrl(url);
                return true;
            }

            @Override
            public void onPageFinished(WebView view, String url) {
                super.onPageFinished(view, url);
            }
        });
    }

    private class MyWebChromeClient extends WebChromeClient {
        private View mCustomView;
        private CustomViewCallback mCustomViewCallback;
        @Override
        public void onShowCustomView(View view, CustomViewCallback callback) {
            super.onShowCustomView(view, callback);
            if (mCustomView != null) {
                callback.onCustomViewHidden();
                return;
            }
            mCustomView = view;
            mFrameLayout.addView(mCustomView);
            mCustomViewCallback = callback;
            mWebView.setVisibility(View.GONE);
            setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);
        }

        public void onHideCustomView() {
            mWebView.setVisibility(View.VISIBLE);
            if (mCustomView == null) {
                return;
            }
            mCustomView.setVisibility(View.GONE);
            mFrameLayout.removeView(mCustomView);
            mCustomViewCallback.onCustomViewHidden();
            mCustomView = null;
            setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
            super.onHideCustomView();
        }
    }
    @Override
    public void onConfigurationChanged(Configuration config) {
        super.onConfigurationChanged(config);
        switch (config.orientation) {
            case Configuration.ORIENTATION_LANDSCAPE:
                getWindow().clearFlags(WindowManager.LayoutParams.FLAG_FORCE_NOT_FULLSCREEN);
                getWindow().addFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN);
                break;
            case Configuration.ORIENTATION_PORTRAIT:
                getWindow().clearFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN);
                getWindow().addFlags(WindowManager.LayoutParams.FLAG_FORCE_NOT_FULLSCREEN);
                break;
        }
    }
    @Override
    public void onPause() {
        super.onPause();
        mWebView.onPause();
    }

    @Override
    public void onResume() {
        super.onResume();
        mWebView.onResume();
    }

    @Override
    public void onBackPressed() {
        if (mWebView.canGoBack()) {
            mWebView.goBack();
            return;
        }
        super.onBackPressed();
    }

    @Override
    public void onDestroy() {
        super.onDestroy();
        mWebView.destroy();
    }
}

［END］