问题描述

求解读JAVA代码，为什么MP4文件不能播放？ 12C

下载的一个压缩包（压缩包内含mp4文件、字幕文件等），压缩包有密码，android程序用密码打开压缩文件，并执行一系列操作后，程序自动播放压缩包内的MP4文件，但MP4文件不能直接使用播放器播放，求解答如何能让mp4文件用播放器播放 。。。谢谢 。。。这里是完整代码下载链接：点击下载完整代码，（用JD-GUI直接查看Jar内的代码、0000208821-DF705DD4是去掉了扩展名的压缩文件）

下面是部分代码（代码位于jar文件内的nc.class）：

import android.widget.Toast;import com.is.piano.base.ISApp;import com.ispiano.crc64.Algorithm;import java.io.File;import java.io.PrintStream;import java.util.List;import net.lingala.zip4j.core.ZipFile;import net.lingala.zip4j.exception.ZipException;import net.lingala.zip4j.model.FileHeader;import net.lingala.zip4j.model.ZipParameters;public class nc{  public static boolean a(String paramString1 String paramString2)  {    long l1 = System.currentTimeMillis();    ZipFile localZipFile;    File localFile;    try    {      localZipFile = new ZipFile(paramString1);      localZipFile.setFileNameCharset(""GBK"");      if (localZipFile.isValidZipFile())        break label101;      mh.b(paramString1);      throw new ZipException(""u538Bu7F29u6587u4EF6u4E0Du5408u6CD5u53EFu80FDu88ABu635Fu574F."");    }    catch (ZipException localZipException)    {      localZipException.printStackTrace();      localFile = new File(paramString2);      if (!localFile.exists())        break label99;    }    File[] arrayOfFile;    int i;    if (localFile.isDirectory())    {      arrayOfFile = localFile.listFiles();      i = arrayOfFile.length;    }    for (int j = 0; ; j++)    {      if (j >= i)      {        label99: return false;        label101: if (localZipFile.isEncrypted())          localZipFile.setPassword(""ISPiano Zhang"");        List localList = localZipFile.getFileHeaders();        long l2 = 0L;        for (int k = 0; ; k++)        {          if (k >= localList.size())          {            if (l2 <= mh.b())              break;            return false;          }          l2 += ((FileHeader)localList.get(k)).getUncompressedSize();        }        localZipFile.extractAll(paramString2);        mh.b(paramString1);        System.out.println(""u89E3u538Bu8017u65F6uFF1A"" + (System.currentTimeMillis() - l1));        return true;      }      arrayOfFile[j].delete();    }  }  public static boolean a(String paramString1 String paramString2 String paramString3)  {    System.out.println(""unzipUnfinishFile + paramString1);    while (true)    {      int i;      try      {        String str1 = mh.c() + ""/ispiano/package_cache/"" + paramString1;        ZipFile localZipFile = new ZipFile(str1);        if (!localZipFile.isValidZipFile())          return false;        localZipFile.setPassword(""ISPiano Zhang"");        List localList = localZipFile.getFileHeaders();        Algorithm localAlgorithm = new Algorithm();        i = 0;        if (i < localList.size())          continue;        eg localeg = new eg();        localeg.a(Long.parseLong(paramString3.substring(0 8) + ""00"") paramString2);        localeg.g();        mh.b(str1);        new File(mh.c() + ""/ispiano/package_cache/"" + ""dir_"" + paramString1).delete();        return true;        FileHeader localFileHeader = (FileHeader)localList.get(i);        String str2 = localFileHeader.getFileName();        long l = localFileHeader.getUncompressedSize();        String str3 = localAlgorithm.getFileName(paramString2 + paramString3 + str2);        File localFile = new File(mh.c() + ""/ispiano/video_cache/"" + str3);        mi.c(""jing"" str3 + "" + str2 + ""   "" + localFile.length() + "" + l);        if ((!localFile.exists()) || (localFile.length() != l))        {          mh.b(mh.c() + ""/ispiano/video_cache/"" + str3);          if (mh.b() >= l)            continue;          Toast.makeText(ISApp.a() 2131230828 0).show();          return false;          mh.a(mh.c() + ""/ispiano/package_cache/"" + ""dir_"" + paramString1);          mh.a(mh.c() + ""/ispiano/video_cache/"");          localZipFile.extractFile(str2 mh.c() + ""/ispiano/package_cache/"" + ""dir_"" + paramString1);          new File(mh.c() + ""/ispiano/package_cache/"" + ""dir_"" + paramString1 + ""/"" + str2).renameTo(new File(mh.c() + ""/ispiano/video_cache/"" + str3));        }      }      catch (ZipException localZipException)      {        localZipException.printStackTrace();        return false;      }      i++;    }  }  public static boolean b(String paramString1 String paramString2)  {    try    {      ZipFile localZipFile = new ZipFile(paramString2);      ZipParameters localZipParameters = new ZipParameters();      localZipParameters.setCompressionMethod(8);      localZipParameters.setCompressionLevel(5);      localZipFile.addFolder(paramString1 localZipParameters);      return true;    }    catch (ZipException localZipException)    {      localZipException.printStackTrace();    }    return false;  }  public static boolean c(String paramString1 String paramString2)  {    try    {      new ZipFile(paramString1).extractAll(paramString2);      return true;    }    catch (ZipException localZipException)    {      localZipException.printStackTrace();    }    return false;  }}

解决方案

public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
/* 创建VideoView对象 /
final VideoView videoView = (VideoView) findViewById(R.id.VideoView01);
/ 设置路径 /
videoView.setVideoPath(""/sdcard/test.mp4"");
/ 设置模式-播放进度条 */
videoView.setMediaController(new MediaController(Activity01.this));
videoView.requestFocus();
videoView.start();
}
你都没有加载Android内置的视频播放器，系统也不会从你的压缩文件里面加载，这是逻辑问题

解决方案二：
你学习一下怎么播放mp4然后迁到这个功能就好了

解决方案三：
需要下载DVE转换软件，视频文件，必须转换时可以使用！你是MP4转换DVD格式就行，再转换DVI，再转换MP4这样，才行，