android 文件浏览器实现

项目列表



MainActivity实现代码

package com.example.sdfileexplorer;

import java.io.BufferedReader;

import java.io.File;

import java.io.FileNotFoundException;

import java.io.FileReader;

import java.io.IOException;

import java.util.ArrayList;

import java.util.HashMap;

import java.util.List;

import java.util.Map;

import java.util.Set;

import android.app.Activity;

import android.content.Context;

import android.content.Intent;

import android.graphics.Color;

import android.os.Bundle;

import android.os.Environment;

import android.util.Log;

import android.view.KeyEvent;

import android.view.LayoutInflater;

import android.view.Menu;

import android.view.MenuInflater;

import android.view.MenuItem;

import android.view.View;

import android.view.View.OnClickListener;

import android.view.ViewGroup;

import android.widget.AdapterView;

import android.widget.AdapterView.OnItemClickListener;

import android.widget.BaseAdapter;

import android.widget.Button;

import android.widget.ImageView;

import android.widget.ListView;

import android.widget.TextView;

import android.widget.Toast;

public class MainActivity extends Activity {

ListView list;

TextView path;

Button parent;

Map<String,String[]>arrlist=new HashMap();

//记录当前父文件夹

File currentParent;

//记录当前文件夹下的所有文件数组

File[]currentFiles;

boolean isExit=false;

ArrayList<String> filepath=new ArrayList<String>();

@Override

protected void onCreate(Bundle savedInstanceState) {

// TODO Auto-generated method stub

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

list=(ListView)findViewById(R.id.list);

path=(TextView)findViewById(R.id.path);

parent = (Button) findViewById(R.id.parent);

arrlist.put("fileEndingAudio",getResources().getStringArray(R.array.fileEndingAudio));

arrlist.put("fileEndingExcel",getResources().getStringArray(R.array.fileEndingExcel));

arrlist.put("fileEndingImage",getResources().getStringArray(R.array.fileEndingImage));

arrlist.put("fileEndingPackage",getResources().getStringArray(R.array.fileEndingPackage));

arrlist.put("fileEndingPdf",getResources().getStringArray(R.array.fileEndingPdf));

arrlist.put("fileEndingPPT",getResources().getStringArray(R.array.fileEndingPPT));

arrlist.put("fileEndingText",getResources().getStringArray(R.array.fileEndingText));

arrlist.put("fileEndingVideo",getResources().getStringArray(R.array.fileEndingVideo));

arrlist.put("fileEndingWebText",getResources().getStringArray(R.array.fileEndingWebText));

arrlist.put("fileEndingWord",getResources().getStringArray(R.array.fileEndingWord));

list.setOnItemClickListener(new OnItemClickListener() {

@Override

public void onItemClick(AdapterView<?> parent, View view,

int position, long id) {

//如果是文件则不作处理

if(currentFiles[position].isFile()){

String extendName=getExtendFile(currentFiles[position]);///获取文件拓展名

Intent intent=openFileIntent("."+extendName, currentFiles[position]);

if(intent!=null){

startActivity(intent);

}else{

Toast.makeText(MainActivity.this, "不存在打开此文件的应用！", Toast.LENGTH_LONG);

}

}else if(currentFiles[position].isDirectory()){

File[]tmp=currentFiles[position].listFiles();

if(tmp==null||tmp.length==0){

Toast.makeText(MainActivity.this, "当前文件夹为空文件夹", Toast.LENGTH_LONG).show();

//return;

}

currentParent=currentFiles[position];

currentFiles=tmp;

inflateListView(currentFiles);

}

}

});

path.setOnClickListener(new OnClickListener() {

@Override

public void onClick(View v) {

// TODO Auto-generated method stub

try {

if(!(getRoot().equals("/storage/sdcard"))){//判断是否到根目录

//获取上一级目录

currentParent=currentParent.getCanonicalFile().getParentFile();

currentFiles=currentParent.listFiles();

inflateListView(currentFiles);

}

} catch (IOException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

}

});

parent.setOnClickListener(new OnClickListener() {

@Override

public void onClick(View v) {

// TODO Auto-generated method stub

Intent intent=new Intent();

intent.setAction(Intent.ACTION_MAIN);

intent.addCategory(Intent.CATEGORY_HOME);

startActivity(intent);

}

});

}

public String getRoot(){//获取根目录的子字符串

String str="";

try {

if(currentParent.getCanonicalPath().equals("/storage/sdcard")){

str="/storage/sdcard";

}else{

str=currentParent.getCanonicalPath().substring(0, currentParent.getCanonicalPath().length()-1);

}

} catch (IOException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

return str;

}

@Override

public boolean onKeyDown(int keyCode, KeyEvent event) {

// TODO Auto-generated method stub

if(keyCode==KeyEvent.KEYCODE_BACK){

try{

if(getRoot().equals("/storage/sdcard")){

if(!isExit){

new Thread(){

public void run(){

int count=0;

while(count<5000){

count++;

}

isExit=false;

}

}.start();

Toast.makeText(MainActivity.this, "在按一次退出SD卡文件浏览器", Toast.LENGTH_SHORT).show();

isExit=true;

}else if(isExit){

finish();

}

}else{

currentParent=currentParent.getCanonicalFile().getParentFile();

currentFiles=currentParent.listFiles();

inflateListView(currentFiles);

}

}catch(Exception e){

e.printStackTrace();

}

}else if(keyCode==KeyEvent.KEYCODE_MENU){

if(getRoot().equals("/storage/sdcard")){

openOptionsMenu();

}

}

return true;

}

///根据拓展名获取相应的Intent

public Intent openFileIntent(String extendFileName,File file){

String intentType=null;

for(String set:arrlist.keySet()){

String[]tmp=arrlist.get(set);

for(int j=0;j<tmp.length;j++){

if(extendFileName.equals(tmp[j])){

if(set.equals("fileEndingAudio")){

return OpenFile.getAudioFileIntent(file);

}else if(set.equals("fileEndingExcel")){

return OpenFile.getExcelFileIntent(file);

}else if(set.equals("fileEndingImage")){

return OpenFile.getImageFileIntent(file);

}else if(set.equals("fileEndingPackage")){

return OpenFile.getApkFileIntent(file);

}else if(set.equals("fileEndingPdf")){

return OpenFile.getPdfFileIntent(file);

}else if(set.equals("fileEndingPPT")){

return OpenFile.getPPTFileIntent(file);

}else if(set.equals("fileEndingText")){

return OpenFile.getTextFileIntent(file);

}else if(set.equals("fileEndingVideo")){

return OpenFile.getVideoFileIntent(file);

}else if(set.equals("fileEndingWebText")){

return OpenFile.getHtmlFileIntent(file);

}else if(set.equals("fileEndingWord")){

return OpenFile.getWordFileIntent(file);

}

break;

}

}

}

return null;

}

@Override

public boolean onCreateOptionsMenu(Menu menu) {

// TODO Auto-generated method stub

Log.e("oncreateop", "fdadfad");

//menu=(Menu) LayoutInflater.from(MainActivity.this).inflate(R.menu.menu,null);

MenuInflater inflater=new MenuInflater(this);

inflater.inflate(R.menu.menu, menu);

//获取系统的SD卡的目录

File root=null;

if(Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)){///获取的是内置存储卡

BufferedReader br=null;

try {

br=new BufferedReader(new FileReader(new File("/system/etc/vold.fstab")));

StringBuilder sb=new StringBuilder("");

String line=null;

while((line=br.readLine())!=null){

String[]strtmp=line.split(" ");

if(strtmp.length>0){

if(strtmp[0].equals("dev_mount")){

if(strtmp[3].equals("emmc@fat")){

Log.e("emmc@fat", "内置存储卡");

menu.addSubMenu("内置存储卡");

filepath.add(strtmp[2]);

}else if(strtmp[3].equals("auto")){

Log.e("auto", "外置存储卡");

menu.addSubMenu("外置存储卡");

filepath.add(strtmp[2]);

}

}

}

}

} catch (FileNotFoundException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}catch(IOException io){

io.printStackTrace();

}

root=new File(Environment.getExternalStorageDirectory().getPath());

if(root.exists()){

currentParent=root;

currentFiles=currentParent.listFiles();

//使用当前目录下的全部文件、文件夹来填充ListView

inflateListView(currentFiles);

}

}else{

Toast.makeText(MainActivity.this, "手机中没有SD卡", Toast.LENGTH_LONG).show();

}

return true;

}

@Override

public boolean onOptionsItemSelected(MenuItem item) {

if(item.getTitle().toString().trim().equals("内置存储卡")){

currentParent=new File(filepath.get(0));

currentFiles=currentParent.listFiles();

inflateListView(currentFiles);

}else if(item.getTitle().toString().trim().equals("外置存储卡")){

currentParent=new File(filepath.get(1));

currentFiles=currentParent.listFiles();

inflateListView(currentFiles);

}

return true;

}

private void inflateListView(File[]files){

List<Map<String,Object>>listItems=new ArrayList<Map<String,Object>>();

if(files!=null){

for(int i=0;i<files.length;i++){

Map<String,Object>listItem=new HashMap<String, Object>();

if(files[i].isDirectory()){

listItem.put("icon", R.drawable.folder);

}else if(files[i].isFile()){

listItem.put("icon", R.drawable.file);

}

listItem.put("filename", files[i].getName());

listItems.add(listItem);

}

//SimpleAdapter adapter=new SimpleAdapter(MainActivity.this, listItems,R.layout.line, new String[]{"icon","filename"}, new int[]{R.id.icon,R.id.file_name});

}

MyAdapter adapter=new MyAdapter(MainActivity.this, listItems);

list.setAdapter(adapter);

try {

path.setText("当前路径为："+currentParent.getCanonicalPath());

} catch (IOException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

}

public String getExtendFile(File file){

String path=file.getPath();

String[]strtmp=path.split("\\.");

if(strtmp.length>0){

return strtmp[strtmp.length-1];

}else{

return null;

}

}

}

class MyAdapter extends BaseAdapter{

Context context;

List<Map<String,Object>>listItems;

public MyAdapter(Context context,List<Map<String,Object>>listItems){

this.context=context;

this.listItems=listItems;

}

@Override

public int getCount() {

// TODO Auto-generated method stub

return listItems.size();

}

@Override

public Object getItem(int position) {

// TODO Auto-generated method stub

return listItems.get(position);

}

@Override

public long getItemId(int position) {

// TODO Auto-generated method stub

return position;

}

@Override

public View getView(int position, View convertView, ViewGroup parent) {

convertView=LayoutInflater.from(context).inflate(R.layout.line,null);

ImageView image=(ImageView) convertView.findViewById(R.id.icon);

TextView textView=(TextView)convertView.findViewById(R.id.file_name);

if(listItems!=null&&listItems.size()>0){

image.setImageResource(Integer.parseInt(listItems.get(position).get("icon").toString()));

textView.setText(listItems.get(position).get("filename").toString());

textView.setTextColor(Color.WHITE);

}

return convertView;

}

}

OpenFile实现代码

package com.example.sdfileexplorer;

import java.io.File;

import android.content.Intent;

import android.net.Uri;

public class OpenFile {

//android获取一个用于打开HTML文件的intent

public static Intent getHtmlFileIntent(File file)

{

Uri uri = Uri.parse(file.toString()).buildUpon().encodedAuthority("com.android.htmlfileprovider").scheme("content").encodedPath(file.toString()).build();

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

intent.setDataAndType(uri, "text/html");

return intent;

}

//android获取一个用于打开图片文件的intent

public static Intent getImageFileIntent(File file)

{

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(file);

intent.setDataAndType(uri, "image/*");

return intent;

}

//android获取一个用于打开PDF文件的intent

public static Intent getPdfFileIntent(File file)

{

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(file);

intent.setDataAndType(uri, "application/pdf");

return intent;

}

//android获取一个用于打开文本文件的intent

public static Intent getTextFileIntent(File file)

{

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(file);

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

return intent;

}

//android获取一个用于打开音频文件的intent

public static Intent getAudioFileIntent(File file)

{

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(file);

intent.setDataAndType(uri, "audio/*");

return intent;

}

//android获取一个用于打开视频文件的intent

public static Intent getVideoFileIntent(File file)

{

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(file);

intent.setDataAndType(uri, "video/*");

return intent;

}

//android获取一个用于打开CHM文件的intent

public static Intent getChmFileIntent(File file)

{

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(file);

intent.setDataAndType(uri, "application/x-chm");

return intent;

}

//android获取一个用于打开Word文件的intent

public static Intent getWordFileIntent(File file)

{

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(file);

intent.setDataAndType(uri, "application/msword");

return intent;

}

//android获取一个用于打开Excel文件的intent

public static Intent getExcelFileIntent(File file)

{

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(file);

intent.setDataAndType(uri, "application/vnd.ms-excel");

return intent;

}

//android获取一个用于打开PPT文件的intent

public static Intent getPPTFileIntent(File file)

{

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(file);

intent.setDataAndType(uri, "application/vnd.ms-powerpoint");

return intent;

}

//android获取一个用于打开apk文件的intent

public static Intent getApkFileIntent(File file)

{

Intent intent = new Intent();

intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);

intent.setAction(android.content.Intent.ACTION_VIEW);

intent.setDataAndType(Uri.fromFile(file), "application/vnd.android.package-archive");

return intent;

}

}

运行效果图



本人测试手机为android 4.2.2，有问题留言

源代码可在csdn下载