Android WebView Video完全详解（第一篇）-Android开发人员

转载请注明出处
http://blog.csdn.net/u014513456/article/details/54381361
Author：[email protected]

背景
最近公司某项功能需要WebView加载H5的Video，搜索很多资料后发现很多问题，都是关键代码片段，因为每个项目每个人产生的问题不同，Video在webview中加载不出来原因很多，可能是客户端少了参数，也可能是前端出了问题，经过研究后对Android WebView 加载H5Video标签做此详解。

前端人员需要操作事项传送门
Android WebView Video完全详解（第二篇）-H5前端开发人员
http://blog.csdn.net/u014513456/article/details/54381527

需要注意的几个点

video 播放有两种状态，在原来组件的位置直接播放，全屏播放。
IOS客户端对H5 Video标签做了特殊处理，即H5直接用video标签即可，但是Android客户端需要特殊JS处理，所以前端开发需要注意，在下面代码段会划重点。
AndroidManifest.xml中Activity需要开加速，需要全屏设置需要设置configChanges
Video可以在Fragment中或者Activity中，但多个Fragment中共用一个Activity如果全屏播放建议考虑横屏时生命周期，如果单开Activity加载WebView会更加清爽。

Anroid 客户端画重点

settings相关的设置

@TargetApi(Build.VERSION_CODES.HONEYCOMB)
    private void setUpWebViewDefaults(WebView webView) {
        WebSettings settings = webView.getSettings();

        // Enable Javascript
        settings.setJavaScriptEnabled(true);

        // Use WideViewport and Zoom out if there is no viewport defined
        settings.setUseWideViewPort(true);
        settings.setLoadWithOverviewMode(true);

        // Enable pinch to zoom without the zoom buttons
        settings.setBuiltInZoomControls(false);

        // Allow use of Local Storage
        settings.setDomStorageEnabled(true);

        if (Build.VERSION.SDK_INT > Build.VERSION_CODES.HONEYCOMB) {
            // Hide the zoom controls for HONEYCOMB+
            settings.setDisplayZoomControls(false);
        }

        // Enable remote debugging via chrome://inspect
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {
            WebView.setWebContentsDebuggingEnabled(true);
        }

        webView.setWebViewClient(new WebViewClient());
    }

WebChromeClient 相关设置

 void setChromeClient() {
        mWebView.setWebChromeClient(new WebChromeClient() {

            @Override
            public Bitmap getDefaultVideoPoster() {
                if (this == null) {
                    return null;
                }

                //这个地方是加载h5的视频列表 默认图   点击前的视频图
                return BitmapFactory.decodeResource(getApplicationContext().getResources(),
                        R.mipmap.ic_launcher);
            }

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

                // 1. Stash the current state
                mCustomView = view;
                mOriginalSystemUiVisibility = getWindow().getDecorView().getSystemUiVisibility();
                mOriginalOrientation = getRequestedOrientation();

                // 2. Stash the custom view callback
                mCustomViewCallback = callback;

                // 3. Add the custom view to the view hierarchy
                FrameLayout decor = (FrameLayout) getWindow().getDecorView();
                decor.addView(mCustomView, new FrameLayout.LayoutParams(
                        ViewGroup.LayoutParams.MATCH_PARENT,
                        ViewGroup.LayoutParams.MATCH_PARENT));


                // 4. Change the state of the window
                getWindow().getDecorView().setSystemUiVisibility(
                        View.SYSTEM_UI_FLAG_LAYOUT_STABLE |
                                View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION |
                                View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN |
                                View.SYSTEM_UI_FLAG_HIDE_NAVIGATION |
                                View.SYSTEM_UI_FLAG_FULLSCREEN |
                                View.SYSTEM_UI_FLAG_IMMERSIVE);
                setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);
            }

            @Override
            public void onHideCustomView() {
                // 1. Remove the custom view
                FrameLayout decor = (FrameLayout) getWindow().getDecorView();
                decor.removeView(mCustomView);
                mCustomView = null;

                // 2. Restore the state to it's original form
                getWindow().getDecorView()
                        .setSystemUiVisibility(mOriginalSystemUiVisibility);
                setRequestedOrientation(mOriginalOrientation);

                // 3. Call the custom view callback
                mCustomViewCallback.onCustomViewHidden();
                mCustomViewCallback = null;

            }

        });
    }

如果是Activity中就三步走

initView(); //初始化webview
setUpWebViewDefaults(mWebView); //设置settings
setChromeClient(); //设置chromeClient
mWebView.loadUrl("file:///android_asset/www/index.html");

大功告成
这里写图片描述

是啊只给代码段，我怎么知道往哪里拼~~~~
我喜欢直接拷贝啦~
走你~

package open.ppdai.com.webviewh5video;

import android.annotation.TargetApi;
import android.app.Activity;
import android.content.pm.ActivityInfo;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.os.Build;
import android.os.Bundle;
import android.os.Handler;
import android.view.View;
import android.view.ViewGroup;
import android.webkit.WebChromeClient;
import android.webkit.WebSettings;
import android.webkit.WebView;
import android.webkit.WebViewClient;
import android.widget.FrameLayout;

/**
 * Email:[email protected]
 *
 * @data:17/1/12 上午11:16
 * @Description:${todo}
 *
 */
public class MainActivity extends Activity {

    private WebView mWebView;
    private View mCustomView;
    private int mOriginalSystemUiVisibility;
    private int mOriginalOrientation;
    private WebChromeClient.CustomViewCallback mCustomViewCallback;
    protected FrameLayout mFullscreenContainer;
    private Handler mHandler;

    public MainActivity() {
        mHandler = new Handler();
    }

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        initView();
        setUpWebViewDefaults(mWebView);
        setChromeClient();
     mWebView.loadUrl("file:///android_asset/www/index.html"); //这个地方是本地的assets下的h5文件
//android开发人员直接拿这个标准的文件去看是否能从当前页面播放，是否能全屏播放
    }

    private void initView() {
        mWebView = (WebView) findViewById(R.id.webview);
    }

    void setChromeClient() {
        mWebView.setWebChromeClient(new WebChromeClient() {

            @Override
            public Bitmap getDefaultVideoPoster() {
                if (this == null) {
                    return null;
                }

                //这个地方是加载h5的视频列表 默认图   点击前的视频图
                return BitmapFactory.decodeResource(getApplicationContext().getResources(),
                        R.mipmap.ic_launcher);
            }

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

                // 1. Stash the current state
                mCustomView = view;
                mOriginalSystemUiVisibility = getWindow().getDecorView().getSystemUiVisibility();
                mOriginalOrientation = getRequestedOrientation();

                // 2. Stash the custom view callback
                mCustomViewCallback = callback;

                // 3. Add the custom view to the view hierarchy
                FrameLayout decor = (FrameLayout) getWindow().getDecorView();
                decor.addView(mCustomView, new FrameLayout.LayoutParams(
                        ViewGroup.LayoutParams.MATCH_PARENT,
                        ViewGroup.LayoutParams.MATCH_PARENT));


                // 4. Change the state of the window
                getWindow().getDecorView().setSystemUiVisibility(
                        View.SYSTEM_UI_FLAG_LAYOUT_STABLE |
                                View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION |
                                View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN |
                                View.SYSTEM_UI_FLAG_HIDE_NAVIGATION |
                                View.SYSTEM_UI_FLAG_FULLSCREEN |
                                View.SYSTEM_UI_FLAG_IMMERSIVE);
                setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);
            }

            @Override
            public void onHideCustomView() {
                // 1. Remove the custom view
                FrameLayout decor = (FrameLayout) getWindow().getDecorView();
                decor.removeView(mCustomView);
                mCustomView = null;

                // 2. Restore the state to it's original form
                getWindow().getDecorView()
                        .setSystemUiVisibility(mOriginalSystemUiVisibility);
                setRequestedOrientation(mOriginalOrientation);

                // 3. Call the custom view callback
                mCustomViewCallback.onCustomViewHidden();
                mCustomViewCallback = null;

            }

        });
    }

    @TargetApi(Build.VERSION_CODES.HONEYCOMB)
    private void setUpWebViewDefaults(WebView webView) {
        WebSettings settings = webView.getSettings();

        // Enable Javascript
        settings.setJavaScriptEnabled(true);

        // Use WideViewport and Zoom out if there is no viewport defined
        settings.setUseWideViewPort(true);
        settings.setLoadWithOverviewMode(true);

        // Enable pinch to zoom without the zoom buttons
        settings.setBuiltInZoomControls(false);

        // Allow use of Local Storage
        settings.setDomStorageEnabled(true);

        if (Build.VERSION.SDK_INT > Build.VERSION_CODES.HONEYCOMB) {
            // Hide the zoom controls for HONEYCOMB+
            settings.setDisplayZoomControls(false);
        }

        // Enable remote debugging via chrome://inspect
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {
            WebView.setWebContentsDebuggingEnabled(true);
        }

        webView.setWebViewClient(new WebViewClient());
    }


}

布局文件里面就一个webview 如果不想写直接去下载代码唠~

看到这里，如果你的webview还是没有加载出Video来，那你直接把这这个demo运行结果扔给前端，并且把第二篇文章给前端人员看好了

这里写图片描述

戳我下载demo 直接改下load的url就能测试下前端代码唠~~
戳戳戳~戳走bug~
http://download.csdn.net/download/u014513456/9736220

如果不想看源码直接安装demo 下载
http://download.csdn.net/download/u014513456/10220266

Android WebView Video完全详解（第一篇）-Android开发人员

猜你喜欢