通过Intent打开手机中能够阅读word，excle或pdf的应用，让那个应用来打开文件。这里给出word，excle的open

OpenWord类

package com.example.tomorrow.MobileOA.utils;import android.content.Context;import android.content.Intent;import android.content.pm.PackageManager;import android.content.pm.ResolveInfo;import android.net.Uri;import java.io.File;import java.util.List;/** * Created by he on 11/10 2015.  * wang */public class OpenWord {　　//param为文档的主要路径    public static Intent getWordFileIntent(String param) {        Intent intent = null;        try {            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");        } catch (Exception e) {            e.printStackTrace();        }        return intent;    }    public static Intent getExcelFileIntent(File 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(param);        intent.setDataAndType(uri, "application/vnd.ms-excel");        return intent;    }    /**     * 判断Intent 是否存在 防止崩溃     * @param context     * @param intent     * @return     */    public static boolean isIntentAvailable(Context context, Intent intent) {        final PackageManager packageManager = context.getPackageManager();        List
     
       list = packageManager.queryIntentActivities(intent,                PackageManager.GET_ACTIVITIES);        return list.size() > 0;    }}
     

 为一个按钮绑定事件

bt_download_look.setOnClickListener(new View.OnClickListener() {            @Override            public void onClick(View v) {                String name = files.get(position).getName();                FileUtils fileUtils = new FileUtils();                String path = fileUtils.getSDPATH() + "MobileOA/" + name;                Intent intent = OpenWord.getWordFileIntent(path);                boolean flag = OpenWord.isIntentAvailable(context, intent);                if (!flag) {                    Toast.makeText(context, "请安装offer", Toast.LENGTH_SHORT).show();                } else {                    context.startActivity(intent);                }            }        });