android用于打开各种文件的intent

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;  
  
   }  
  
}