import android.app.Activity;
import Android.content.Intent;
import android.net.Uri;
import android.net.Uri.Builder;
import Java.io.File;
import android.content.Intent;
//自定義android Intent類，
//可用于獲取打開以下文件的intent
//PDF,PPT,WORD,EXCEL,CHM,HTML,TEXT,AUDIO,VIDEO

示例:

//這個不行，可能是因為PDF.apk程序沒有權限訪問其它APK里的asset資源文件,又或者是路徑寫錯?
//Intent it = getPdfFileIntent("file:///android_asset/helphelp.pdf");
//下面這些都OK
//Intent it = getHtmlFileIntent("/mnt/sdcard/tutorial.html");//SD卡主目錄
//Intent it = getHtmlFileIntent("/sdcard/tutorial.html");//SD卡主目錄,這樣也可以
Intent it = getHtmlFileIntent("/system/etc/tutorial.html");//系統(tǒng)內部的etc目錄
//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目錄下
//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獲取一個用于打開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獲取一個用于打開圖片文件的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獲取一個用于打開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獲取一個用于打開文本文件的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獲取一個用于打開音頻文件的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獲取一個用于打開視頻文件的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獲取一個用于打開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獲取一個用于打開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獲取一個用于打開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獲取一個用于打開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;
 }
}