app调用手机其他应用打开文件

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根据需求，app中展示的文件需要实现分享和用手机安装的相关软件打开查看，所以就用到了“其他应用打开文件”的功能，供用户不同途径的查阅。

这里，我们直接上代码：

Step1:首先是查看文件的格式，即type的判断

import android.content.ActivityNotFoundException;
import android.content.Context;
import android.content.Intent;
import android.Uri;
import android.widget.Toast;

import java.io.File;

/**
 * 判断所要查看文件的格式
 */

public class OpenFileUtils {

    public void openFile(Context context, File file){
        try{
            Intent intent = new Intent();
            intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
            //设置intent的Action属性
            intent.setAction(Intent.ACTION_VIEW);
            //获取文件file的MIME类型
            String type = getMIMEType(file);
            Logger.i("type++++++",type);
            //设置intent的data和Type属性。
            intent.setDataAndType(/*uri*/Uri.fromFile(file), type);
            //跳转
            context.startActivity(intent);
//      Intent.createChooser(intent, "请选择对应的软件打开该附件！");
        }catch (ActivityNotFoundException e) {
            // TODO: handle exception
            Toast.makeText(context, "sorry附件不能打开，请下载相关软件！",Toast.LENGTH_SHORT).show();
        }
    }
    private String getMIMEType(File file) {

        String type="*/*";
        String fName = file.getName();
        //获取后缀名前的分隔符"."在fName中的位置。
        int dotIndex = fName.lastIndexOf(".");
        if(dotIndex < 0){
            return type;
        }
        /* 获取文件的后缀名*/
        String end=fName.substring(dotIndex,fName.length()).toLowerCase();
        if(end=="")return type;
        //在MIME和文件类型的匹配表中找到对应的MIME类型。
        for(int i=0;i<MIME_MapTable.length;i++){
            if(end.equals(MIME_MapTable[i][0]))
                type = MIME_MapTable[i][1];
        }
        return type;
    }
    // 可以自己随意添加
    private String [][]  MIME_MapTable={
            //{后缀名，MIME类型}
            {".3gp",    "video/3gpp"},
            {".apk",    "application/vnd.android.package-archive"},
            {".asf",    "video/x-ms-asf"},
            {".avi",    "video/x-msvideo"},
            {".bin",    "application/octet-stream"},
            {".bmp",    "image/bmp"},
            {".c",  "text/plain"},
            {".class",  "application/octet-stream"},
            {".conf",   "text/plain"},
            {".cpp",    "text/plain"},
            {".doc",    "application/msword"},
            {".docx",   "application/vnd.openxmlformats-officedocument.wordprocessingml.document"},
            {".xls",    "application/vnd.ms-excel"},
            {".xlsx",   "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet"},
            {".exe",    "application/octet-stream"},
            {".gif",    "image/gif"},
            {".gtar",   "application/x-gtar"},
            {".gz", "application/x-gzip"},
            {".h",  "text/plain"},
            {".htm",    "text/html"},
            {".html",   "text/html"},
            {".jar",    "application/java-archive"},
            {".java",   "text/plain"},
            {".jpeg",   "image/jpeg"},
            {".jpg",    "image/jpeg"},
            {".js", "application/x-javascript"},
            {".log",    "text/plain"},
            {".m3u",    "audio/x-mpegurl"},
            {".m4a",    "audio/mp4a-latm"},
            {".m4b",    "audio/mp4a-latm"},
            {".m4p",    "audio/mp4a-latm"},
            {".m4u",    "video/vnd.mpegurl"},
            {".m4v",    "video/x-m4v"},
            {".mov",    "video/quicktime"},
            {".mp2",    "audio/x-mpeg"},
            {".mp3",    "audio/x-mpeg"},
            {".mp4",    "video/mp4"},
            {".mpc",    "application/vnd.mpohun.certificate"},
            {".mpe",    "video/mpeg"},
            {".mpeg",   "video/mpeg"},
            {".mpg",    "video/mpeg"},
            {".mpg4",   "video/mp4"},
            {".mpga",   "audio/mpeg"},
            {".msg",    "application/vnd.ms-outlook"},
            {".ogg",    "audio/ogg"},
            {".pdf",    "application/pdf"},
            {".png",    "image/png"},
            {".pps",    "application/vnd.ms-powerpoint"},
            {".ppt",    "application/vnd.ms-powerpoint"},
            {".pptx",   "application/vnd.openxmlformats-officedocument.presentationml.presentation"},
            {".prop",   "text/plain"},
            {".rc", "text/plain"},
            {".rmvb",   "audio/x-pn-realaudio"},
            {".rtf",    "application/rtf"},
            {".sh", "text/plain"},
            {".tar",    "application/x-tar"},
            {".tgz",    "application/x-compressed"},
            {".txt",    "text/plain"},
            {".wav",    "audio/x-wav"},
            {".wma",    "audio/x-ms-wma"},
            {".wmv",    "audio/x-ms-wmv"},
            {".wps",    "application/vnd.ms-works"},
            {".xml",    "text/plain"},
            {".z",  "application/x-compress"},
            {".zip",    "application/x-zip-compressed"},
            {"",        "*/*"}
    };
}

Step2:布局实现pdf的展示

使用布局前我们要先导入包：

compile ‘com.github.barteksc:android-pdf-viewer:3.0.0-beta.3’

xml代码：

    <com.github.barteksc.pdfviewer.PDFView
        android:id="@+id/pdf_view"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_marginRight="10dp"
        android:layout_marginLeft="10dp"
        android:layout_marginBottom="30dp"
        android:layout_centerHorizontal="true"/>

Step3:

本文标签： 文件 手机 App