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，

//可用於獲取開啟以下檔案的intent

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

示例:

//這個不行，可能是因為PDF.apk程式沒有許可權訪問其它APK裡的asset資原始檔,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獲取一個用於開啟HTML檔案的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獲取一個用於開啟圖片檔案的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獲取一個用於開啟PDF檔案的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獲取一個用於開啟文字檔案的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獲取一個用於開啟音訊檔案的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獲取一個用於開啟視訊檔案的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獲取一個用於開啟CHM檔案的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獲取一個用於開啟Word檔案的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獲取一個用於開啟Excel檔案的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獲取一個用於開啟PPT檔案的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;

  }

}