android用以打开各种文件的intent

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;

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//自定义android Intent类，

//可用于获取打开以下文件的intent

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

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示例:

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//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);

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startActivity( it );

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public class MyIntent

{

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//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;

??}

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//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;

??}

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??//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;

??}

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//android获取一个用于打开文本文件的intent

?public static Intent getTextFileIntent( String param, boolean paramBoolean)

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{

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

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

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?intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);

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?if (paramBoolean)

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?{

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Uri uri1 = Uri.parse(param );

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

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?}

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?else

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?{

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

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

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?}

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?return intent;

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}

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//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;

??}

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??//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;

??}

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??//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;

??}

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//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;

??}

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//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;

??}

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//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;

??}

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}