import android.app.Activity;  

import android.content.Intent;  

import android.net.Uri;  

import android.content.Intent;  

//PDF,PPT,WORD,EXCEL,CHM,HTML,TEXT,AUDIO,VIDEO  

示例:  

//这个不行，可能是因为PDF.apk程序没有权限访问其它APK里的asset资源文件,又或者是路径写错?  

//Intent it = getPdfFileIntent("file:///android_asset/helphelp.pdf");  

//下面这些都OK  

//Intent it = getHtmlFileIntent("/mnt/sdcard/tutorial.html");//SD卡主目录  

//Intent it = getHtmlFileIntent("/sdcard/tutorial.html");//SD卡主目录,这样也可以  

Intent it = getHtmlFileIntent("/system/etc/tutorial.html");//系统内部的etc目录  

//Intent it = getPdfFileIntent("/system/etc/helphelp.pdf");  

//Intent it = getWordFileIntent("/system/etc/help.doc");  

//Intent it = getExcelFileIntent("/mnt/sdcard/Book1.xls")  

//Intent it = getPptFileIntent("/mnt/sdcard/download/Android_PPT.ppt");//SD卡的download目录下  

//Intent it = getVideoFileIntent("/mnt/sdcard/ice.avi");  

//Intent it = getAudioFileIntent("/mnt/sdcard/ren.mp3");  

//Intent it = getImageFileIntent("/mnt/sdcard/images/001041580.jpg");  

//Intent it = getTextFileIntent("/mnt/sdcard/hello.txt",false);  

startActivity( it );  

public class MyIntent  

{  

//android获取一个用于打开HTML文件的intent  

  public static Intent getHtmlFileIntent( String param )  

  {  

    Uri uri = Uri.parse(param ).buildUpon().encodedAuthority("com.android.htmlfileprovider").scheme("content").encodedPath(param ).build();  

    Intent intent = new Intent("android.intent.action.VIEW");  

    intent.setDataAndType(uri, "text/html");  

    return intent;  

  }  

//android获取一个用于打开图片文件的intent  

  public static Intent getImageFileIntent( String param )  

  {  

    Intent intent = new Intent("android.intent.action.VIEW");  

    intent.addCategory("android.intent.category.DEFAULT");  

    intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);  

    Uri uri = Uri.fromFile(new File(param ));  

    intent.setDataAndType(uri, "image/*");  

    return intent;  

  }  

  //android获取一个用于打开PDF文件的intent  

  public static Intent getPdfFileIntent( String param )  

  {  

    Intent intent = new Intent("android.intent.action.VIEW");  

    intent.addCategory("android.intent.category.DEFAULT");  

    intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);  

    Uri uri = Uri.fromFile(new File(param ));  

    intent.setDataAndType(uri, "application/pdf");  

    return intent;  

  }  

//android获取一个用于打开文本文件的intent  

public static Intent getTextFileIntent( String param, boolean paramBoolean)   

{  

Intent intent = new Intent("android.intent.action.VIEW");  

  intent.addCategory("android.intent.category.DEFAULT");  

intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);  

if (paramBoolean)  

{  

Uri uri1 = Uri.parse(param );  

intent.setDataAndType(uri1, "text/plain");  

}  

else  

{  

Uri uri2 = Uri.fromFile(new File(param ));  

intent.setDataAndType(uri2, "text/plain");  

}  

return intent;  

}  

//android获取一个用于打开音频文件的intent  

  public static Intent getAudioFileIntent( String param )  

  {  

    Intent intent = new Intent("android.intent.action.VIEW");  

    intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);  

  intent.putExtra("oneshot", 0);  

    intent.putExtra("configchange", 0);  

    Uri uri = Uri.fromFile(new File(param ));  

    intent.setDataAndType(uri, "audio/*");  

    return intent;  

  }  

  //android获取一个用于打开视频文件的intent  

  public static Intent getVideoFileIntent( String param )  

  {  

     Intent intent = new Intent("android.intent.action.VIEW");  

    intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);  

    intent.putExtra("oneshot", 0);  

    intent.putExtra("configchange", 0);  

    Uri uri = Uri.fromFile(new File(param ));  

    intent.setDataAndType(uri, "video/*");  

    return intent;  

  }  

  //android获取一个用于打开CHM文件的intent  

  public static Intent getChmFileIntent( String param )  

  {   

    Intent intent = new Intent("android.intent.action.VIEW");  

    intent.addCategory("android.intent.category.DEFAULT");  

    intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);  

    Uri uri = Uri.fromFile(new File(param ));  

    intent.setDataAndType(uri, "application/x-chm");  

    return intent;  

  }  

//android获取一个用于打开Word文件的intent  

   public static Intent getWordFileIntent( String param )  

  {  

     Intent intent = new Intent("android.intent.action.VIEW");  

     intent.addCategory("android.intent.category.DEFAULT");  

     intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);  

     Uri uri = Uri.fromFile(new File(param ));  

     intent.setDataAndType(uri, "application/msword");  

     return intent;  

   }  

//android获取一个用于打开Excel文件的intent  

   public static Intent getExcelFileIntent( String param )  

   {  

     Intent intent = new Intent("android.intent.action.VIEW");  

     intent.addCategory("android.intent.category.DEFAULT");  

     intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);  

     Uri uri = Uri.fromFile(new File(param ));  

     intent.setDataAndType(uri, "application/vnd.ms-excel");  

     return intent;  

   }  

//android获取一个用于打开PPT文件的intent  

   public static Intent getPptFileIntent( String param )  

   {  

     Intent intent = new Intent("android.intent.action.VIEW");  

     intent.addCategory("android.intent.category.DEFAULT");  

     intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);  

     Uri uri = Uri.fromFile(new File(param ));  

     intent.setDataAndType(uri, "application/vnd.ms-powerpoint");  

     return intent;  

   }  

}