YouTube 视频未在 WebView 中播放 [英] YouTube Video not playing in WebView

问题描述

YouTube 视频未在 WebView 中播放.

这是我的第一个应用程序，我想做一个网络视图.当我打开 YouTube 时，视频未播放，正在加载但未播放.一直在加载.非常感谢您的帮助.

It my first app ,I Want to do a webview. When I open YouTube the video not playing, is loading but not playing. Is loading all the time. Thank you so much for helping.

Java:

public class MainActivity extends Activity {

    private WebView mWebView;  

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

        mWebView = (WebView) findViewById(R.id.webview);
        mWebView.getSettings().setJavaScriptEnabled(true);
        mWebView.loadUrl("http://www.google.com");
        mWebView.setWebViewClient(new HelloWebViewClient());

    }

private class HelloWebViewClient extends WebViewClient {
        @Override
        public boolean shouldOverrideUrlLoading(WebView webview, String url)
        {
        webview.loadUrl(url);
        return true;
    }}

    @Override
    public boolean onKeyDown(int keyCode, KeyEvent event)
    {
        if ((keyCode == KeyEvent.KEYCODE_BACK) && mWebView.canGoBack())
        {
            mWebView.goBack();
            return true;
        }
        return super.onKeyDown(keyCode, event);

    }   }

XML:

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

推荐答案

似乎重复了 playWebView 中的 youtube 视频 和 YouTube 视频未播放WebView - 安卓

为了通过 WebView 使其工作，我使用了以下两个步骤(版本 4.2.2/Nexus 4):

To make it work via WebView, I used the following two steps (version 4.2.2/Nexus 4):

1. 在 shouldOverrideUrlLoading 上，我添加了 webview.setWebChromeClient(new WebChromeClient());

在 AndroidManifest.xml 的 activity 标签中，我添加了 android:hardwareAccelerated="true"

In AndroidManifest.xml for activity tag I added android:hardwareAccelerated="true"

AndroidManifest.xml 还应包含 Internet 权限.

AndroidManifest.xml should also contain Internet permission.

虽然通过 WebView 播放视频的具体步骤可能特定于设备和 Android 版本，但还有其他 WebView 替代方案，如 VideoView 或使用 Youtube Android Player API.

While exact steps with playing video via WebView can be specific to device and Android version, there are also other alternatives to WebView, like VideoView or using Youtube Android Player API.

EDIT1

关于暂停和全屏，这其实是我开头提到的第二个链接.为方便起见，我发布了适用于我的 Nexus 的代码.

As for pause and full screen, this is actually a second link I mentioned in the beginning. To make it easier, I am posting code that worked on my Nexus.

1. 在activity_main.xml中

1. In activity_main.xml

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
 tools:context=".MainActivity" >

<FrameLayout
          android:id="@+id/fullscreen_custom_content"
          android:layout_width="match_parent"
          android:layout_height="match_parent"
          android:background="#FF000000"/>

<LinearLayout 
          android:id="@+id/linearlayout"
          android:layout_width="fill_parent" 
          android:layout_height="fill_parent"> 

     <WebView
           android:id="@+id/webView"
           android:layout_width="fill_parent"
           android:layout_height="fill_parent" />

</LinearLayout>
</RelativeLayout>

在 MainActivity 类中:

In MainActivity class:

public class MainActivity extends Activity {

private WebView mWebView;  
private LinearLayout mContentView;
private FrameLayout mCustomViewContainer;
private WebChromeClient.CustomViewCallback mCustomViewCallback;
FrameLayout.LayoutParams COVER_SCREEN_GRAVITY_CENTER = new FrameLayout.LayoutParams(
        ViewGroup.LayoutParams.WRAP_CONTENT,
        ViewGroup.LayoutParams.WRAP_CONTENT, Gravity.CENTER);

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

    mContentView = (LinearLayout) findViewById(R.id.linearlayout);
    mWebView = (WebView) findViewById(R.id.webView);
    mCustomViewContainer = (FrameLayout) findViewById(R.id.fullscreen_custom_content);

    WebSettings webSettings = mWebView.getSettings();
    webSettings.setPluginState(WebSettings.PluginState.ON);
    webSettings.setJavaScriptEnabled(true);
    webSettings.setUseWideViewPort(true);
    webSettings.setLoadWithOverviewMode(true);

    mWebView.loadUrl("http://www.google.com");
    mWebView.setWebViewClient(new HelloWebViewClient());

}

@Override
public boolean onCreateOptionsMenu(Menu menu) {
    // Inflate the menu; this adds items to the action bar if it is present.
    getMenuInflater().inflate(R.menu.main, menu);
    return true;
}



private class HelloWebViewClient extends WebViewClient  {
    @Override
    public boolean shouldOverrideUrlLoading(WebView webview, String url)
    {
        webview.setWebChromeClient(new WebChromeClient() {

            private View mCustomView;

             @Override
            public void onShowCustomView(View view, WebChromeClient.CustomViewCallback callback)
            {
                // if a view already exists then immediately terminate the new one
                if (mCustomView != null)
                {
                    callback.onCustomViewHidden();
                    return;
                }

                // Add the custom view to its container.
                mCustomViewContainer.addView(view, COVER_SCREEN_GRAVITY_CENTER);
                mCustomView = view;
                mCustomViewCallback = callback;

                // hide main browser view
                mContentView.setVisibility(View.GONE);

                // Finally show the custom view container.
                mCustomViewContainer.setVisibility(View.VISIBLE);
                mCustomViewContainer.bringToFront();
            }

        }); 

      webview.loadUrl(url);

      return true;
    }
}

@Override
public boolean onKeyDown(int keyCode, KeyEvent event)
{
    if ((keyCode == KeyEvent.KEYCODE_BACK) && mWebView.canGoBack())
    {
        mWebView.goBack();
        return true;
    }
    return super.onKeyDown(keyCode, event);

} 
}

EDIT2 - 添加后退按钮支持

EDIT2 - adding back button support

public class MainActivity extends Activity {

private WebView mWebView;  
private LinearLayout mContentView;
private FrameLayout mCustomViewContainer;
private View mCustomView;
private WebChromeClient.CustomViewCallback mCustomViewCallback;
FrameLayout.LayoutParams COVER_SCREEN_GRAVITY_CENTER = new FrameLayout.LayoutParams(
        ViewGroup.LayoutParams.WRAP_CONTENT,
        ViewGroup.LayoutParams.WRAP_CONTENT, Gravity.CENTER);

private WebChromeClient mWebChromeClient;

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

    mContentView = (LinearLayout) findViewById(R.id.linearlayout);
    mWebView = (WebView) findViewById(R.id.webView);
    mCustomViewContainer = (FrameLayout) findViewById(R.id.fullscreen_custom_content);

    mWebChromeClient = new WebChromeClient() {


         @Override
        public void onShowCustomView(View view, WebChromeClient.CustomViewCallback callback)
        {
            // if a view already exists then immediately terminate the new one
            if (mCustomView != null)
            {
                callback.onCustomViewHidden();
                return;
            }

            // Add the custom view to its container.
            mCustomViewContainer.addView(view, COVER_SCREEN_GRAVITY_CENTER);
            mCustomView = view;
            mCustomViewCallback = callback;

            // hide main browser view
            mContentView.setVisibility(View.GONE);

            // Finally show the custom view container.
            mCustomViewContainer.setVisibility(View.VISIBLE);
            mCustomViewContainer.bringToFront();
        }

         @Override
         public void onHideCustomView()
         {
             if (mCustomView == null)
                 return;

             // Hide the custom view.
             mCustomView.setVisibility(View.GONE);
             // Remove the custom view from its container.
             mCustomViewContainer.removeView(mCustomView);
             mCustomView = null;
             mCustomViewContainer.setVisibility(View.GONE);
             mCustomViewCallback.onCustomViewHidden();

             // Show the content view.
             mContentView.setVisibility(View.VISIBLE);
         } 
    };

    WebSettings webSettings = mWebView.getSettings();
    webSettings.setPluginState(WebSettings.PluginState.ON);
    webSettings.setJavaScriptEnabled(true);
    webSettings.setUseWideViewPort(true);
    webSettings.setLoadWithOverviewMode(true);

    mWebView.loadUrl("http://www.google.com");
    mWebView.setWebViewClient(new HelloWebViewClient());

}

@Override
public boolean onCreateOptionsMenu(Menu menu) {
    // Inflate the menu; this adds items to the action bar if it is present.
    getMenuInflater().inflate(R.menu.main, menu);
    return true;
}



private class HelloWebViewClient extends WebViewClient  {

    @Override
    public boolean shouldOverrideUrlLoading(WebView webview, String url)
    {
        webview.setWebChromeClient(mWebChromeClient);   
        webview.loadUrl(url);

      return true;
    }
}

@Override
protected void onStop() {

    super.onStop();
    if (mCustomView != null)
    {
        if (mCustomViewCallback != null)
            mCustomViewCallback.onCustomViewHidden();
        mCustomView = null;
    }

}

@Override
public void onBackPressed() {

    super.onBackPressed();
     if (mCustomView != null)
     {
         mWebChromeClient.onHideCustomView();
     } else
     {
         finish();
     }
}

@Override
public boolean onKeyDown(int keyCode, KeyEvent event)
{
    if ((keyCode == KeyEvent.KEYCODE_BACK) && mWebView.canGoBack())
    {
        mWebView.goBack();
        return true;
    }
    return super.onKeyDown(keyCode, event);

}   
}

这篇关于YouTube 视频未在 WebView 中播放的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！