android 文件瀏覽器實現

cd33 9年前發布 | 5K 次閱讀 Java Android
項目列表
MainActivity實現代碼
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();
//記錄當前父文件夾
File currentParent;
//記錄當前文件夾下的所有文件數組
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) {
//如果是文件則不作處理
if(currentFiles[position].isFile()){
String extendName=getExtendFile(currentFiles[position]);///獲取文件拓展名
Intent intent=openFileIntent("."+extendName, currentFiles[position]);
if(intent!=null){
startActivity(intent);
}else{
Toast.makeText(MainActivity.this, "不存在打開此文件的應用！", Toast.LENGTH_LONG);
}
}else if(currentFiles[position].isDirectory()){
File[]tmp=currentFiles[position].listFiles();
if(tmp==null||tmp.length==0){
Toast.makeText(MainActivity.this, "當前文件夾為空文件夾", 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"))){//判斷是否到根目錄
//獲取上一級目錄
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(){//獲取根目錄的子字符串
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卡文件瀏覽器", 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;
}
///根據拓展名獲取相應的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);
//獲取系統的SD卡的目錄
File root=null;
if(Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)){///獲取的是內置存儲卡
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", "內置存儲卡");
menu.addSubMenu("內置存儲卡");
filepath.add(strtmp[2]);
}else if(strtmp[3].equals("auto")){
Log.e("auto", "外置存儲卡");
menu.addSubMenu("外置存儲卡");
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();
//使用當前目錄下的全部文件、文件夾來填充ListView
inflateListView(currentFiles);
}
}else{
Toast.makeText(MainActivity.this, "手機中沒有SD卡", Toast.LENGTH_LONG).show();
}
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
if(item.getTitle().toString().trim().equals("內置存儲卡")){
currentParent=new File(filepath.get(0));
currentFiles=currentParent.listFiles();
inflateListView(currentFiles);
}else if(item.getTitle().toString().trim().equals("外置存儲卡")){
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("當前路徑為："+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實現代碼
package com.example.sdfileexplorer;
import java.io.File;
import android.content.Intent;
import android.net.Uri;
public class OpenFile {
//android獲取一個用于打開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獲取一個用于打開圖片文件的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獲取一個用于打開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獲取一個用于打開文本文件的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獲取一個用于打開音頻文件的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獲取一個用于打開視頻文件的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獲取一個用于打開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獲取一個用于打開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獲取一個用于打開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獲取一個用于打開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獲取一個用于打開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;
    }
}</pre> 

 


 
 

 運行效果圖
本文由用戶 cd33 自行上傳分享，僅供網友學習交流。所有權歸原作者，若您的權利被侵害，請聯系管理員。
轉載本站原創文章，請注明出處，并保留原始鏈接、圖片水印。
本站是一個以用戶分享為主的開源技術平臺，歡迎各類分享！
本文地址：http://www.baiduhome.net/code/view/1427545834652
Java Android
android 文件瀏覽器實現

相關代碼

相關文檔

相關經驗

目錄
