那些遇到过的问题

在webview中加载flv视频的问题

Nik*_*tel 12 flash android

我想在webview中加载 .flv视频.

我从这个链接中获得了帮助,但问题是我无法在模拟器中查看视频.

这是我的代码:

package com.FlvTester;

import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;

import android.app.Activity;
import android.os.Bundle;
import android.webkit.WebView;
import android.widget.FrameLayout;

public class FlvTester extends Activity {

WebView webView;
String htmlPre = "<!DOCTYPE html><html lang=\"en\"><head><meta charset=\"utf-8\"></head><body style='margin:0; pading:0; background-color: black;'>";  
String htmlCode = 
        " <embed style='width:100%; height:100%'  src='http://www.platipus.nl/flvplayer/download/1.0/FLVPlayer.swf?fullscreen=true&video=@VIDEO@' " +
        "  autoplay='true' " +
        "  quality='high' bgcolor='#000000' " +
        "  name='VideoPlayer' align='middle'" + // width='640' height='480' 
        "  allowScriptAccess='*' allowFullScreen='true'" +
        "  type='application/x-shockwave-flash' " +
        "  pluginspage='http://www.macromedia.com/go/getflashplayer' />" +
        "";
String htmlPost = "</body></html>";

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main); 

    webView = (WebView)findViewById(R.id.webview);

    webView.getSettings().setJavaScriptEnabled(true);
    webView.getSettings().setAllowFileAccess(true);
    webView.getSettings().setPluginsEnabled(true);


    htmlCode = htmlCode.replaceAll("@VIDEO@",  "file:///android_asset/expression_sad.flv");
    webView.loadDataWithBaseURL("file:///android_asset/expression_sad.flv",  htmlPre+htmlCode+htmlPost, "text/html", "UTF-8", null);  
}




@Override
protected void onPause(){
    super.onPause();

    callHiddenWebViewMethod("onPause");

    webView.pauseTimers();
    if(isFinishing()){
        webView.loadUrl("about:blank");
        setContentView(new FrameLayout(this));
    }
}

@Override
protected void onResume(){
    super.onResume();

    callHiddenWebViewMethod("onResume");

    webView.resumeTimers();
}

private void callHiddenWebViewMethod(String name){
    // credits: http://stackoverflow.com/questions/3431351/how-do-i-pause-flash- content-in-an-android-webview-when-my-activity-isnt-visible
    if( webView != null ){
        try {
            Method method = WebView.class.getMethod(name);
            method.invoke(webView);
        } catch (NoSuchMethodException e) {
            //Lo.g("No such method: " + name + e);
        } catch (IllegalAccessException e) {
            //Lo.g("Illegal Access: " + name + e);
        } catch (InvocationTargetException e) {
            //Lo.g("Invocation Target Exception: " + name + e);
        }
    }
  }

}
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我在log cat中遇到了这个错误 

 07-06 12:00:48.567: WARN/dalvikvm(381): threadid=1: thread exiting with uncaught     exception (group=0x4001d800)
 07-06 12:00:48.597: ERROR/AndroidRuntime(381): FATAL EXCEPTION: main
 07-06 12:00:48.597: ERROR/AndroidRuntime(381): java.lang.RuntimeException: Unable to  start activity ComponentInfo{com.FlvTester/com.FlvTester.FlvTester}:   java.lang.ClassCastException: android.widget.VideoView
 07-06 12:00:48.597: ERROR/AndroidRuntime(381):     at    android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2663)
 07-06 12:00:48.597: ERROR/AndroidRuntime(381):     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2679)
 07-06 12:00:48.597: ERROR/AndroidRuntime(381):     at android.app.ActivityThread.access$2300(ActivityThread.java:125)
 07-06 12:00:48.597: ERROR/AndroidRuntime(381):     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2033)
 07-06 12:00:48.597: ERROR/AndroidRuntime(381):     at android.os.Handler.dispatchMessage(Handler.java:99)
 07-06 12:00:48.597: ERROR/AndroidRuntime(381):     at android.os.Looper.loop(Looper.java:123)
 07-06 12:00:48.597: ERROR/AndroidRuntime(381):     at android.app.ActivityThread.main(ActivityThread.java:4627)
 07-06 12:00:48.597: ERROR/AndroidRuntime(381):     at java.lang.reflect.Method.invokeNative(Native Method)
 07-06 12:00:48.597: ERROR/AndroidRuntime(381):     at java.lang.reflect.Method.invoke(Method.java:521)
 07-06 12:00:48.597: ERROR/AndroidRuntime(381):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
 07-06 12:00:48.597: ERROR/AndroidRuntime(381):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
 07-06 12:00:48.597: ERROR/AndroidRuntime(381):     at dalvik.system.NativeStart.main(Native Method)
 07-06 12:00:48.597: ERROR/AndroidRuntime(381): Caused by: java.lang.ClassCastException: android.widget.VideoView
 07-06 12:00:48.597: ERROR/AndroidRuntime(381):     at com.FlvTester.FlvTester.onCreate(FlvTester.java:31)
 07-06 12:00:48.597: ERROR/AndroidRuntime(381):     at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
 07-06 12:00:48.597: ERROR/AndroidRuntime(381):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2627)
 07-06 12:00:48.597: ERROR/AndroidRuntime(381):     ... 11 more
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main.xml中

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

<WebView android:layout_width="match_parent" android:id="@+id/webview"  android:layout_height="match_parent"></WebView> 
</LinearLayout>
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更新

这是新形象

Mer*_*lin 11

你没有清楚说明你的Android版本,但是我可以确认flash插件确实加载了并且电影播放器​​确实用旋转形状图形进行了激活.我可以将其用于全屏模式.我也可以播放在线视频但不能从应用程序的资源文件夹中播放,但是我确实有一个解决方法.

您的manifest.xml中需要以下许可:

<uses-permission android:name="android.permission.INTERNET"></uses-permission> <!-- where required -->
<uses-permission android:name="android.permission.WAKE_LOCK"></uses-permission>
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有趣的是,我发现当静态加载html时,我只能从assets文件夹运行SWF播放器,即当我创建一个html文件并使用loadUrl()直接从assets文件夹加载时.当使用loadDataBaseUrl方法加载html数据时,似乎阻止访问应用程序目录.

要成功地从本地设备播放视频,静态html文件和视频必须共同位于SD卡上.我唯一的结论是,出于安全原因,assets文件夹不受嵌入式插件的限制.

if (!Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)){
    Log.d(TAG, "No SDCARD");
} else {
    webView.loadUrl("file://"+Environment.getExternalStorageDirectory()+"/FLVplayer/index.html");
    }
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这是html文件

<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
</head>
<body style="margin:0; pading:0; background-color: black;">
<embed
 style="width:100%; height:100%"
 src="./FLVPlayer.swf?fullscreen=true&video=./expression_sad.flv"
 autoplay="true"
 quality="high"
 bgcolor="#000000"
 name="VideoPlayer"
 align="middle"
 allowScriptAccess="*"
 allowFullScreen="true"
 type="application/x-shockwave-flash"
 pluginspage="http://www.macromedia.com/go/getflashplayer">
 </embed>
</body>
</html>
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这是一个100%可行的解决方案,但在调用loadUrl以动态替换视频文件名之前,您必须将html文件写入sdcard.此外,您应该将视频资源文件夹中的视频复制到SD卡上的相同路径中(正如您从我的exaple中看到的,我创建了一个名为FLVplayer的文件夹.

在运行Froyo的三星Galaxy Tab上进行测试(2.2)

UPDATE

我正在完成一项经过测试和工作的完整活动.这需要将Flash播放器,FLV文件和index.html文件的副本放在SD卡根目录中名为"FLVplayer"的文件夹中,您可以使用文件浏览器进行复制.您可以编辑各种实用程序功能以修改行为以从assetes文件夹中复制文件

package com.FLVplayer;

import java.io.File;
import java.io.IOException;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;

import android.app.Activity;
import android.net.Uri;
import android.os.Bundle;
import android.os.Environment;
import android.util.Log;
import android.webkit.WebView;
import android.widget.FrameLayout;

public class FLVplayerActivity extends Activity {

private static final String TAG="FLVplayer";
private static WebView webView;

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main); 

    webView = (WebView)findViewById(R.id.webview);

    //WebView webview = new WebView(this); 
    //setContentView(webview);

    webView.getSettings().setJavaScriptEnabled(true);
    webView.getSettings().setAllowFileAccess(true);
    webView.getSettings().setPluginsEnabled(true);

    if (!Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)){
        Log.d(TAG, "No SDCARD");
    } else {

        //prepare the directory
        File flvDirectory = new File(Environment.getExternalStorageDirectory(),"FLVplayer");

        if(!flvDirectory.exists())
            try {
                flvDirectory.createNewFile();
            } catch (IOException e) {
                e.printStackTrace();
            }

        //specify the html file name to use
        File flvHtml = new File(flvDirectory,"index.html");

        //copy what you need
        copySwfAsset(flvDirectory, "FLVPlayer.swf");
        copyFlvAsset(flvDirectory, "20051210-w50s.flv");

        //render the html
        createVideoHtml(flvHtml, "20051210-w50s.flv");

        //load the content into the webview
        webView.loadUrl(Uri.fromFile(flvHtml).toString());

        //sit back, watch FLV and eat popcorn
    }
}

private void createVideoHtml(File htmlFile, String htmlFileName)
{
    //TODO render your own html file to sdcard
}

private void copySwfAsset(File flvDirectory, String flashFileName)
{
    //TODO copy your own SWF video player file from assets
}

private void copyFlvAsset(File flvDirectory, String videoFileName)
{
    //TODO copy your oown FLV file from asset folder
}

@Override
protected void onPause(){
    super.onPause();

    callHiddenWebViewMethod("onPause");

    webView.pauseTimers();
    if(isFinishing()){
        webView.loadUrl("about:blank");
        setContentView(new FrameLayout(this));
    }
}

@Override
protected void onResume(){
    super.onResume();

    callHiddenWebViewMethod("onResume");

    webView.resumeTimers();
}

private void callHiddenWebViewMethod(String name){
    // credits: http://stackoverflow.com/questions/3431351/how-do-i-pause-flash- content-in-an-android-webview-when-my-activity-isnt-visible
    if( webView != null ){
        try {
            Method method = WebView.class.getMethod(name);
            method.invoke(webView);
        } catch (NoSuchMethodException e) {
            //Lo.g("No such method: " + name + e);
        } catch (IllegalAccessException e) {
            //Lo.g("Illegal Access: " + name + e);
        } catch (InvocationTargetException e) {
            //Lo.g("Invocation Target Exception: " + name + e);
        }
    }
  }

}
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ADENDUM

我相信可能有办法绕过安全问题,截取各种文件的URL并使用WebViewClient.shouldInterceptRequest()直接从assets文件夹返回数据,但这需要API 11,因此不适合作为通用解决方案.

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