Android使用WebView播放外网视频

一开始使用了MediaPlayer，但是一直报ContentProviderNotFound的错误，后来才发现别人提供的是一个HTML页面，所以要使用WebView。

一、在AndroidManifest.xml中加入：

（否则会报net::ERR_CACHE_MISS）

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

application节点里：

android:hardwareAccelerated ="true"

Activity节点里：

android:hardwareAccelerated="true"
android:configChanges="orientation|screenSize|keyboardHidden"

二、布局文件：

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

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

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

</RelativeLayout>

三、MainActivity：

 private WebView wvBookPlay;
    //private TextView tvUrl;
    private FrameLayout flVideoContainer;
    String url = "http://（IP）:9000/javascript_simple.html";


    @SuppressLint("JavascriptInterface")
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        wvBookPlay = (WebView)findViewById(R.id.wvBookPlay);
        flVideoContainer = findViewById(R.id.flVideoContainer);

        wvBookPlay.getSettings().setJavaScriptEnabled(true);
        wvBookPlay.getSettings().setUseWideViewPort(true);
        wvBookPlay.getSettings().setLoadWithOverviewMode(true);
        wvBookPlay.getSettings().setAllowFileAccess(true);
        wvBookPlay.getSettings().setSupportZoom(true);
        wvBookPlay.getSettings().setJavaScriptCanOpenWindowsAutomatically(true);

        try {
            if (Build.VERSION.SDK_INT >= 16) {
                Class<?> clazz = wvBookPlay.getSettings().getClass();
                Method method = clazz.getMethod("setAllowUniversalAccessFromFileURLs", boolean.class);
                if (method != null) {
                    method.invoke(wvBookPlay.getSettings(), true);
                }
            }
        } catch (Exception e) {
            e.printStackTrace();
        }

        wvBookPlay.getSettings().setPluginState(WebSettings.PluginState.ON);
        wvBookPlay.getSettings().setDomStorageEnabled(true);// 必须保留，否则无法播放优酷视频，其他的OK
        //wvBookPlay.setWebChromeClient(new MyWebChromeClient());// 重写一下，有的时候可能会出现问题
        wvBookPlay.setWebViewClient(new WebViewClient(){
            @Override
            public boolean shouldOverrideUrlLoading(WebView view, WebResourceRequest request) {
                view.loadUrl(url);
                 return true;
                //return super.shouldOverrideUrlLoading(view, request);
            }
        });

        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
            wvBookPlay.getSettings().setMixedContentMode(wvBookPlay.getSettings().MIXED_CONTENT_ALWAYS_ALLOW);
        }


        CookieManager cookieManager = CookieManager.getInstance();
        StringBuffer stringBuffer = new StringBuffer();
        stringBuffer.append("android");

        cookieManager.setCookie(url, stringBuffer.toString());
        cookieManager.setAcceptCookie(true);

        wvBookPlay.loadUrl(url);

    }

    @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;
        }
    }

    private class MyWebChromeClient extends WebChromeClient {
        WebChromeClient.CustomViewCallback mCallback;
        @Override
        public void onShowCustomView(View view, CustomViewCallback callback) {
            Log.i("ToVmp","onShowCustomView");
            fullScreen();

            wvBookPlay.setVisibility(View.GONE);
            flVideoContainer.setVisibility(View.VISIBLE);
            flVideoContainer.addView(view);
            mCallback = callback;
            super.onShowCustomView(view, callback);
        }

        @Override
        public void onHideCustomView() {
            Log.i("ToVmp","onHideCustomView");
            fullScreen();

            wvBookPlay.setVisibility(View.VISIBLE);
            flVideoContainer.setVisibility(View.GONE);
            flVideoContainer.removeAllViews();
            super.onHideCustomView();

        }

//        @Override
//        public boolean shouldOverrideUrlLoading(WebView view, String url) {
//            view.loadUrl(url);
//            return true;
//        }

    }

    private void fullScreen() {
        if (getResources().getConfiguration().orientation == Configuration.ORIENTATION_PORTRAIT) {
            setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);
            Log.i("ToVmp","横屏");
        } else {
            setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
            Log.i("ToVmp","竖屏");
        }
    }

    @Override
    protected void onDestroy() {
        if (wvBookPlay != null) {
            wvBookPlay.destroy();
        }
        super.onDestroy();
    }