开源中国 Android 文件夹管理

来源：互联网发布：商务数据分析是什么编辑：程序博客网时间：2024/06/06 00:19
1. [文件] 我的文件1.0.apk ~ 200KB 下载(54)

2. [图片] 腾讯手机管家截屏2013071301.png

3. [文件] MainActivity.java ~ 8KB 下载(26)

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packagecom.Syl.filemanager;
 
importjava.io.File;
importjava.util.ArrayList;
importjava.util.Currency;
importjava.util.HashMap;
importjava.util.List;
importandroid.net.Uri;
importandroid.os.Bundle;
importandroid.os.Environment;
importandroid.annotation.SuppressLint;
importandroid.app.Activity;
importandroid.app.AlertDialog;
importandroid.content.DialogInterface;
importandroid.content.Intent;
importandroid.view.KeyEvent;
importandroid.view.View;
importandroid.widget.AdapterView;
importandroid.widget.ListView;
importandroid.widget.SimpleAdapter;
importandroid.widget.TextView;
importandroid.widget.Toast;
importandroid.widget.AdapterView.OnItemClickListener;
 
@SuppressLint("NewApi")
publicclass MainActivity extendsActivity { 
       
    privateList<String> paths=null;  
    privateString rootPath="/";  
    privateTextView path;  
    privateListView lv;
    privateString backPath = "";
    privatelong firstTime = 0;
    
    @Override 
    protectedvoid onCreate(Bundle savedInstanceState) {   
        super.onCreate(savedInstanceState);  
                
        /* 设定Layout  activity_main.xml*/       
        if(isSDAvailable ()) {
            setContentView(R.layout.activity_main);  
            path = (TextView)findViewById(R.id.filePath); 
            lv = (ListView)findViewById(R.id.list); 
            backPath = getSDPath(); 
             
            rootPath = getSDPath();
            getFileDir(rootPath);
        }else{
            setContentView(R.layout.no_sd); 
        }
                  
    }  
    
    privatevoid getFileDir(String filePath) {      
        path.setText(filePath); 
         
        backPath = filePath;        
        System.out.println("filePath:"+filePath);
         
        paths = newArrayList<String>();     
        File f = newFile(filePath);     
        File[] files=f.listFiles(); 
                 
        if(files == null) {
            return;
        }
                         
        ArrayList<HashMap<String, Object>>  file_list = newArrayList<HashMap<String,Object>>();
        if(!filePath.equals(rootPath))  
        {  
            for(inti = 0; i < 2; i++) {
                if(i == 0) {
                    HashMap<String, Object> map = newHashMap<String, Object>();
                    map.put("list_image",null);
                    map.put("list_text", getString(R.string.back_to) + rootPath);
                    file_list.add(map);
                    paths.add(rootPath);  
                }
                else{
                    HashMap<String, Object> map = newHashMap<String, Object>();
                    map.put("list_image",null);
                    map.put("list_text", getString(R.string.back_to_parent));
                    file_list.add(map);               
                    paths.add(f.getParent());                  
                }
            }
        }  
         
        //将文件放入ArrayList數组中
        for(inti = 0; i < files.length; i++) {     
            HashMap<String, Object> map = newHashMap<String, Object>();
            File file=files[i];
            if(file.canRead()) {
                if(file.isDirectory()) {
                    map.put("list_image", R.drawable.fileicon);
                }else{
                    //不同文件类型设置不同icon
                    String end=file.getName().substring(file.getName().lastIndexOf(".")
                            +1,file.getName().length()).toLowerCase();
                    if(end.equals("jpg")||end.equals("gif")||end.equals("png")||  
                              end.equals("jpeg")||end.equals("bmp")) {
                        map.put("list_image", R.drawable.pic);
                    }elseif (end.equals("mp3")||end.equals("mid")||end.equals("wav")) {
                        map.put("list_image", R.drawable.myfiles_file_mp3_b);
                    }elseif (end.equals("3gp")||end.equals("mp4")||end.equals("rmvb")) {
                        map.put("list_image", R.drawable.myfiles_icon_video);
                    }elseif (end.equals("apk")) {
                        map.put("list_image", R.drawable.myfiles_file_apk_b);
                    }elseif (end.equals("txt")||end.equals("c")||end.equals("java")||end.equals("xml")||
                              end.equals("cpp")) {
                        map.put("list_image", R.drawable.myfiles_file_txt);
                    }else{
                        map.put("list_image", R.drawable.other_file);
                    }
                }
            }else{
                map.put("list_image", R.drawable.other_file);
            }
            map.put("list_text", file.getName());
            file_list.add(map);
            paths.add(file.getPath());
        }
        SimpleAdapter listItemAdapter = newSimpleAdapter(this, file_list, R.layout.file_item, 
            newString[] {"list_image","list_text"},
            newint[] {R.id.imageItem,R.id.textItem});
     
        lv.setAdapter(listItemAdapter);
        lv.setOnItemClickListener(newOnFileManagerItemClickListener());                
    }
         
    @Override
    publicboolean onKeyUp(intkeyCode, KeyEvent event) {
        // TODO Auto-generated method stub
        if(isSDAvailable ()) {
            longsecTime = System.currentTimeMillis();
            System.out.println("getSDPath():"+getSDPath());
            System.out.println("backPath:"+backPath);      
            System.out.println("secTime - firstTime="+(secTime - firstTime));
            if(KeyEvent.KEYCODE_BACK == keyCode) {
                if(!backPath.equals(getSDPath())) {
                    getFileDir((newFile(backPath)).getParent());
                }else{
                    if(secTime - firstTime <= 2500) {
                        MainActivity.this.finish();
                        System.exit(0);
                    }else{
                        Toast.makeText(MainActivity.this, R.string.double_back, Toast.LENGTH_SHORT).show();
                        firstTime = System.currentTimeMillis();
                        returntrue;
                    }
                }
            }
            returnfalse;
        }else{
            returnsuper.onKeyUp(keyCode, event);
        }
    }
 
    privateclass OnFileManagerItemClickListener implementsOnItemClickListener {
 
        @Override
        publicvoid onItemClick(AdapterView<?> arg0, View arg1, intarg2,
                longarg3) {
            // TODO Auto-generated method stub
            File file = newFile(paths.get(arg2));   
            if(file.canRead()) {   
              if(file.isDirectory()) {
                  getFileDir(paths.get(arg2));  
              }else{
                  openSelectFile(file);
              }  
            }  
            else{   
              /* 弹出AlertDialog提示*/ 
              newAlertDialog.Builder(MainActivity.this)  
                  .setTitle(R.string.friendly_tip)  
                  .setMessage(R.string.file_cant_read)  
                  .setPositiveButton("OK",newDialogInterface.OnClickListener() {   
                      publicvoid onClick(DialogInterface dialog,intwhich) {
                          dialog.dismiss();
                      }  
                    }).show();       
            }  
         }         
    }
     
    privateboolean isSDAvailable() {
        if(Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)) {
            returntrue;
        }
        returnfalse;
    }
     
    privateString getSDPath() {
        String path = Environment.getExternalStoragePublicDirectory("").toString();
        if(path == null) {
            path = "/";
        }
        returnpath;
    }
     
    privatevoid openSelectFile(File f) {   
        Intent intent = newIntent();   
        intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);  
        intent.setAction(android.content.Intent.ACTION_VIEW);  
                
        String type = getFileType(f);   
        intent.setDataAndType(Uri.fromFile(f),type);  
        startActivity(intent);   
    }  
 
  /**
   * 判断文件类型   
   **/
    privateString getFileType(File f) {    
        String type="";  
        String fName=f.getName();   
        /* 取得扩展名 */ 
        String end=fName.substring(fName.lastIndexOf(".")+1,fName.length()).toLowerCase();   
            
        /* 依扩展名的类型决定FileType */ 
        if(end.equals("mp3")||end.equals("mid")||end.equals("wav")||end.equals("aac")||
              end.equals("amr"))  
        {  
          type = "audio";   
        }  
        elseif(end.equals("3gp")||end.equals("mp4")||end.equals("rmvb"))  
        {  
          type = "video";  
        }  
        elseif(end.equals("jpg")||end.equals("gif")||end.equals("png")||  
        end.equals("jpeg")||end.equals("bmp"))  
        {  
          type = "image";  
        }  
        elseif(end.equals("apk"))   
        {   
          /* android.permission.INSTALL_PACKAGES */   
          type = "application/vnd.android.package-archive";   
        }
        elseif(end.equals("txt")||end.equals("c")||end.equals("java")||end.equals("xml")||
              end.equals("cpp")) {
          type = "text";
        }
        else 
        {  
          type="*";  
        }  
        /*若无法直接打开文件，就弹出软件列表*/ 
        if(end.equals("apk"))   
        {   
        }   
        else   
        {   
          type += "/*";    
        }   
        returntype;     
    } 
 }
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