android文件管理

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent" >

    <EditText
        android:id="@+id/editText"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" />

</LinearLayout>

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    >
<ListView
    android:id="@android :id/list"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    />
</LinearLayout>

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="horizontal" >

    <ImageView
        android:id="@+id/imageView"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content" />

    <TextView
        android:id="@+id/textView"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:textSize="14sp" >
    </TextView>
</LinearLayout>

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity" >

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/hello_world" />

</RelativeLayout>

 

package com.wenjian;

import java.io.File;
import java.util.ArrayList;

import android.net.Uri;
import android.os.Bundle;
import android.app.Activity;
import android.app.AlertDialog;
import android.app.ListActivity;
import android.content.Context;
import android.content.DialogInterface;
import android.content.DialogInterface.OnClickListener;
import android.content.Intent;
import android.content.res.Resources;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Matrix;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.EditText;
import android.widget.ImageView;
import android.widget.ListView;
import android.widget.TextView;
import android.widget.Toast;

public class MainActivity extends ListActivity {
    private static final String ROOT_PATH = "/";
    //存儲文件名稱
    private ArrayList<String> names = null;
    //存儲文件路徑
    private ArrayList<String> paths = null;
    private View view;
    private EditText editText;
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        //顯示文件列表
        showFileDir(ROOT_PATH);
    }
    private void showFileDir(String path){
        names = new ArrayList<String>();
        paths = new ArrayList<String>();
        File file = new File(path);
        File[] files = file.listFiles();
        
        //若是當前目錄不是根目錄
        if (!ROOT_PATH.equals(path)){
            names.add("@1");
            paths.add(ROOT_PATH);
            
            names.add("@2");
            paths.add(file.getParent());
        }
        //添加全部文件
        for (File f : files){
            names.add(f.getName());
            paths.add(f.getPath());
        }
        this.setListAdapter(new MyAdapter(this,names, paths));
    }
    @Override
    protected void onListItemClick(ListView l, View v, int position, long id) {
        String path = paths.get(position);
        File file = new File(path);
        // 文件存在並可讀
        if (file.exists() && file.canRead()){
            if (file.isDirectory()){
                //顯示子目錄及文件
                showFileDir(path);
            }
            else{
                //處理文件
                fileHandle(file);
            }
        }
        //沒有權限
        else{
            Resources res = getResources();
            new AlertDialog.Builder(this).setTitle("Message")
            .setMessage(res.getString(R.string.no_permission))
            .setPositiveButton("OK",new OnClickListener() {
                @Override
                public void onClick(DialogInterface dialog, int which) {
                    
                }
            }).show();
        }
        super.onListItemClick(l, v, position, id);
    }
    //對文件進行增刪改
    private void fileHandle(final File file){
        OnClickListener listener = new DialogInterface.OnClickListener() {
            @Override
            public void onClick(DialogInterface dialog, int which) {
                // 打開文件
                if (which == 0){
                    openFile(file);
                }
                //修改文件名
                else if(which == 1){
                    LayoutInflater factory = LayoutInflater.from(MainActivity.this);
                    view = factory.inflate(R.layout.rename_dialog, null);
                    editText = (EditText)view.findViewById(R.id.editText);
                    editText.setText(file.getName());
                    
                    OnClickListener listener2 = new DialogInterface.OnClickListener() {
                        @Override
                        public void onClick(DialogInterface dialog, int which) {
                            // TODO Auto-generated method stub
                            String modifyName = editText.getText().toString();
                            final String fpath = file.getParentFile().getPath();
                            final File newFile = new File(fpath + "/" + modifyName);
                            if (newFile.exists()){
                                //排除沒有修改狀況
                                if (!modifyName.equals(file.getName())){
                                    new AlertDialog.Builder(MainActivity.this)
                                    .setTitle("注意!")
                                    .setMessage("文件名已存在，是否覆蓋？")
                                    .setPositiveButton("肯定", new

DialogInterface.OnClickListener() {
                                        @Override
                                        public void onClick(DialogInterface dialog, int

which) {
                                            if (file.renameTo(newFile)){
                                                showFileDir(fpath);
                                                displayToast("重命名成功！");
                                            }
                                            else{
                                                displayToast("重命名失敗！");
                                            }
                                        }
                                    })
                                    .setNegativeButton("取消", new

DialogInterface.OnClickListener() {
                                        @Override
                                        public void onClick(DialogInterface dialog, int

which) {
                                            
                                        }
                                    })
                                    .show();
                                }
                            }
                            else{
                                if (file.renameTo(newFile)){
                                    showFileDir(fpath);
                                    displayToast("重命名成功！");
                                }
                                else{
                                    displayToast("重命名失敗！");
                                }
                            }
                        }
                    };
                    AlertDialog renameDialog = new AlertDialog.Builder

(MainActivity.this).create();
                    renameDialog.setView(view);
                    renameDialog.setButton("肯定", listener2);
                    renameDialog.setButton2("取消", new DialogInterface.OnClickListener() {
                        @Override
                        public void onClick(DialogInterface dialog, int which) {
                            // TODO Auto-generated method stub
                            
                        }
                    });
                    renameDialog.show();
                }
                //刪除文件
                else{
                    new AlertDialog.Builder(MainActivity.this)
                    .setTitle("注意!")
                    .setMessage("肯定要刪除此文件嗎？")
                    .setPositiveButton("肯定", new DialogInterface.OnClickListener() {
                        @Override
                        public void onClick(DialogInterface dialog, int which) {
                            if(file.delete()){
                                //更新文件列表
                                showFileDir(file.getParent());
                                displayToast("刪除成功！");
                            }
                            else{
                                displayToast("刪除失敗！");
                            }
                        }
                    })
                    .setNegativeButton("取消", new DialogInterface.OnClickListener() {
                        @Override
                        public void onClick(DialogInterface dialog, int which) {
                            
                        }
                    }).show();
                }
            }
        };
        //選擇文件時，彈出增刪該操做選項對話框
        String[] menu = {"打開文件","重命名","刪除文件"};
        new AlertDialog.Builder(MainActivity.this)
        .setTitle("請選擇要進行的操做!")
        .setItems(menu, listener)
        .setPositiveButton("取消", new DialogInterface.OnClickListener() {
            @Override
            public void onClick(DialogInterface dialog, int which) {
                
            }
        }).show();
    }
    //打開文件
    private void openFile(File file){
        Intent intent = new Intent();
        intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
        intent.setAction(android.content.Intent.ACTION_VIEW);
        
        String type = getMIMEType(file);
        intent.setDataAndType(Uri.fromFile(file), type);
        startActivity(intent);
    }
    //獲取文件mimetype
    private String getMIMEType(File file){
        String type = "";
        String name = file.getName();
        //文件擴展名
        String end = name.substring(name.lastIndexOf(".") + 1, name.length()).toLowerCase();
        if (end.equals("m4a") || end.equals("mp3") || end.equals("wav")){
            type = "audio";
        }
        else if(end.equals("mp4") || end.equals("3gp")) {
            type = "video";
        }
        else if (end.equals("jpg") || end.equals("png") || end.equals("jpeg") || end.equals

("bmp") || end.equals("gif")){
            type = "image";
        }
        else {
            //若是沒法直接打開，跳出列表由用戶選擇
            type = "*";
        }
        type += "/*";
        return type;
    }
    private void displayToast(String message){
        Toast.makeText(MainActivity.this, message, Toast.LENGTH_SHORT).show();
    }
   
    public class MyAdapter extends BaseAdapter{
        private LayoutInflater inflater;
        private Bitmap directory,file;
        //存儲文件名稱
        private ArrayList<String> names = null;
        //存儲文件路徑
        private ArrayList<String> paths = null;
        //參數初始化
        public MyAdapter(Context context,ArrayList<String> na,ArrayList<String> pa){
            names = na;
            paths = pa;
            directory = BitmapFactory.decodeResource(context.getResources

(),R.drawable.ic_launcher);
            file = BitmapFactory.decodeResource(context.getResources

(),R.drawable.ic_launcher);
            //縮小圖片
            directory = small(directory,0.50f);
            file = small(file,0.5f);
            inflater = LayoutInflater.from(context);
        }
        @Override
        public int getCount() {
            // TODO Auto-generated method stub
            return names.size();
        }
    
        @Override
        public Object getItem(int position) {
            // TODO Auto-generated method stub
            return names.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) {
            // TODO Auto-generated method stub
            ViewHolder holder;
            if (null == convertView){
                convertView = inflater.inflate(R.layout.file, null);
                holder = new ViewHolder();
                holder.text = (TextView)convertView.findViewById(R.id.textView);
                holder.image = (ImageView)convertView.findViewById(R.id.imageView);
                
                convertView.setTag(holder);
            }
            else {
                holder = (ViewHolder)convertView.getTag();
            }
            File f = new File(paths.get(position).toString());
            if (names.get(position).equals("@1")){
                holder.text.setText("/");
                holder.image.setImageBitmap(directory);
            }
            else if (names.get(position).equals("@2")){
                holder.text.setText("..");
                holder.image.setImageBitmap(directory);
            }
            else{
                holder.text.setText(f.getName());
                if (f.isDirectory()){
                    holder.image.setImageBitmap(directory);
                }
                else if (f.isFile()){
                    holder.image.setImageBitmap(file);
                }
                else{
                    System.out.println(f.getName());
                }
            }
            return convertView;
        }
        private class ViewHolder{
            private TextView text;
            private ImageView image;
        }
        private Bitmap small(Bitmap map,float num){
            Matrix matrix = new Matrix();
            matrix.postScale(num, num);
            return Bitmap.createBitmap(map,0,0,map.getWidth(),map.getHeight(),matrix,true);
        }
    }
}

 

package com.wenjian; 
 
import java.io.File; 
import java.io.FileInputStream; 
import java.io.FileOutputStream; 
import java.io.IOException; 
import java.io.OutputStream; 
 
import android.content.Context; 
import android.content.Intent; 
import android.net.Uri; 
import android.os.Environment; 
 
public class FileHelper { 
    private Context context; 
    private String SDPATH; 
    private String FILESPATH;
   
 
    public FileHelper(Context context) { 
        this.context = context; 
        SDPATH = Environment.getExternalStorageDirectory().getPath() + "//"; 
    } 
 
    /** 
     * 打開文件 
     * @param file 
     */ 
    public static void openFile(Context context,File file){ 
        //Uri uri = Uri.parse("file://"+file.getAbsolutePath()); 
        Intent intent = new Intent(); 
        intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK); 
        //設置intent的Action屬性 
        intent.setAction(Intent.ACTION_VIEW); 
        //獲取文件file的MIME類型 
//        String type = MIMEType.getMiMeType(file);
       
        //設置intent的data和Type屬性。 
//        intent.setDataAndType(/*uri*/Uri.fromFile(file), type); 
        //跳轉 
        context.startActivity(intent);     
    } 
    /** 
     * 在SD卡上建立文件 
     *  
     * @throws IOException 
     */ 
    public File creatSDFile(String fileName) throws IOException { 
        File file = new File(SDPATH + fileName); 
        file.createNewFile(); 
        return file; 
    } 
 
    /** 
     * 刪除SD卡上的文件 
     *  
     * @param fileName 
     */ 
    public boolean delSDFile(String fileName) { 
        File file = new File(SDPATH + fileName); 
        if (file == null || !file.exists() || file.isDirectory()) 
            return false; 
        file.delete(); 
        return true; 
    } 
 
    /** 
     * 在SD卡上建立目錄 
     *  
     * @param dirName 
     */ 
    public File creatSDDir(String dirName) { 
        File dir = new File(SDPATH + dirName); 
        dir.mkdir(); 
        return dir; 
    } 
 
    /** 
     * 刪除SD卡上的目錄 
     *  
     * @param dirName 
     */ 
    public boolean delSDDir(String dirName) { 
        File dir = new File(SDPATH + dirName); 
        return delDir(dir); 
    } 
    /** 
     * 修改SD卡上的文件或目錄名 
     * @param fileName 
     */ 
    public boolean renameSDFile(String oldfileName, String newFileName) { 
        File oleFile = new File(oldfileName); 
        File newFile = new File(newFileName); 
        return oleFile.renameTo(newFile); 
    } 
 
    /** 
     * 拷貝SD卡上的單個文件 
     * @param path 
     * @throws IOException 
     */ 
    public boolean copySDFileTo(String srcFileName, String destFileName,String filename) 
            throws IOException { 
        File srcFile = new File(srcFileName); 
        File destFile = new File(destFileName+"/"+filename); 
        return copyFileTo(srcFile, destFile); 
    } 
 
    /** 
     * 拷貝SD卡上指定目錄的全部文件 
     *  
     * @param srcDirName 
     * @param destDirName 
     * @return 
     * @throws IOException 
     */ 
    public boolean copySDFilesTo(String srcDirName, String destDirName,String filename) 
            throws IOException { 
        File srcDir = new File(srcDirName); 
        File destDir = new File(destDirName+"/"+filename); 
        return copyFilesTo(srcDir, destDir); 
    } 
 
    /** 
     * 移動SD卡上的單個文件 
     *  
     * @param srcFileName 
     * @param destFileName 
     * @return 
     * @throws IOException 
     */ 
    public boolean moveSDFileTo(String srcFileName, String destFileName) 
            throws IOException { 
        File srcFile = new File(SDPATH + srcFileName); 
        File destFile = new File(SDPATH + destFileName); 
        return moveFileTo(srcFile, destFile); 
    } 
 
    /** 
     * 移動SD卡上的指定目錄的全部文件 
     * @param srcDirName 
     * @param destDirName 
     * @return 
     * @throws IOException 
     */ 
    public boolean moveSDFilesTo(String srcDirName, String destDirName) 
            throws IOException { 
        File srcDir = new File(SDPATH + srcDirName); 
        File destDir = new File(SDPATH + destDirName); 
        return moveFilesTo(srcDir, destDir); 
    } 
 
 
    /* 
     * 將文件寫入sd卡。如:writeSDFile("test.txt"); 
     */ 
//  public Output writeSDFile(String fileName) throws IOException { 
//      File file = new File(SDPATH + fileName); 
//      FileOutputStream fos = new FileOutputStream(file); 
//      return new Output(fos); 
//  } 
 
    /* 
     * 在原有文件上繼續寫文件。如:appendSDFile("test.txt"); 
     */ 
//  public Output appendSDFile(String fileName) throws IOException { 
//      File file = new File(SDPATH + fileName); 
//      FileOutputStream fos = new FileOutputStream(file, true); 
//      return new Output(fos); 
//  } 
 
    /* 
     * 從SD卡讀取文件。如:readSDFile("test.txt"); 
     */ 
//  public Input readSDFile(String fileName) throws IOException { 
//      File file = new File(SDPATH + fileName); 
//      FileInputStream fis = new FileInputStream(file); 
//      return new Input(fis); 
//  } 
     
     
    /** 
     * 創建私有文件 
     *  
     * @param fileName 
     * @return 
     * @throws IOException 
     */ 
    public File creatDataFile(String fileName) throws IOException { 
        File file = new File(FILESPATH + fileName); 
        file.createNewFile(); 
        return file; 
    } 
 
    /** 
     * 創建私有目錄 
     *  
     * @param dirName 
     * @return 
     */ 
    public File creatDataDir(String dirName) { 
        File dir = new File(FILESPATH + dirName); 
        dir.mkdir(); 
        return dir; 
    } 
 
    /** 
     * 刪除私有文件 
     *  
     * @param fileName 
     * @return 
     */ 
    public boolean delDataFile(String fileName) { 
        File file = new File(FILESPATH + fileName); 
        return delFile(file); 
    } 
 
    /** 
     * 刪除私有目錄 
     *  
     * @param dirName 
     * @return 
     */ 
    public boolean delDataDir(String dirName) { 
        File file = new File(FILESPATH + dirName); 
        return delDir(file); 
    } 
 
    /** 
     * 更改私有文件名 
     *  
     * @param oldName 
     * @param newName 
     * @return 
     */ 
    public boolean renameDataFile(String oldName, String newName) { 
        File oldFile = new File(FILESPATH + oldName); 
        File newFile = new File(FILESPATH + newName); 
        return oldFile.renameTo(newFile); 
    } 
 
    /** 
     * 在私有目錄下進行文件複製 
     *  
     * @param srcFileName 
     *            ： 包含路徑及文件名 
     * @param destFileName 
     * @return 
     * @throws IOException 
     */ 
    public boolean copyDataFileTo(String srcFileName, String destFileName) 
            throws IOException { 
        File srcFile = new File(FILESPATH + srcFileName); 
        File destFile = new File(FILESPATH + destFileName); 
        return copyFileTo(srcFile, destFile); 
    } 
 
    /** 
     * 複製私有目錄裏指定目錄的全部文件 
     *  
     * @param srcDirName 
     * @param destDirName 
     * @return 
     * @throws IOException 
     */ 
    public boolean copyDataFilesTo(String srcDirName, String destDirName) 
            throws IOException { 
        File srcDir = new File(FILESPATH + srcDirName); 
        File destDir = new File(FILESPATH + destDirName); 
        return copyFilesTo(srcDir, destDir); 
    } 
 
    /** 
     * 移動私有目錄下的單個文件 
     *  
     * @param srcFileName 
     * @param destFileName 
     * @return 
     * @throws IOException 
     */ 
    public boolean moveDataFileTo(String srcFileName, String destFileName) 
            throws IOException { 
        File srcFile = new File(FILESPATH + srcFileName); 
        File destFile = new File(FILESPATH + destFileName); 
        return moveFileTo(srcFile, destFile); 
    } 
 
    /** 
     * 移動私有目錄下的指定目錄下的全部文件 
     *  
     * @param srcDirName 
     * @param destDirName 
     * @return 
     * @throws IOException 
     */ 
    public boolean moveDataFilesTo(String srcDirName, String destDirName) 
            throws IOException { 
        File srcDir = new File(FILESPATH + srcDirName); 
        File destDir = new File(FILESPATH + destDirName); 
        return moveFilesTo(srcDir, destDir); 
    } 
 
    /* 
     * 將文件寫入應用私有的files目錄。如:writeFile("test.txt"); 
     */ 
    public OutputStream wirteFile(String fileName) throws IOException { 
        OutputStream os = context.openFileOutput(fileName, 
                Context.MODE_WORLD_WRITEABLE); 
        return  os; 
    } 
 
    /* 
     * 在原有文件上繼續寫文件。如:appendFile("test.txt"); 
     */ 
//  public Output appendFile(String fileName) throws IOException { 
//      OutputStream os = context.openFileOutput(fileName, Context.MODE_APPEND); 
//      return new Output(os); 
//  } 
 
    /* 
     * 從應用的私有目錄files讀取文件。如:readFile("test.txt"); 
     */ 
//  public Input readFile(String fileName) throws IOException { 
//      InputStream is = context.openFileInput(fileName); 
//      return new Input(is); 
//  } 
     
     
     
   

/********************************************************************************************

**************/ 
   

/********************************************************************************************

*************/      /**       * 刪除一個文件       *        * @param file       * @return       */      public boolean delFile(File file) {          if (file.isDirectory())              return false;          return file.delete();      }       /**       * 刪除一個目錄（能夠是非空目錄）       * @param dir       */      public boolean delDir(File dir) {          if (dir == null || !dir.exists() || dir.isFile()) {              return false;          }          for (File file : dir.listFiles()) {              if (file.isFile()) {                  file.delete();              } else if (file.isDirectory()) {                  delDir(file);// 遞歸              }          }          dir.delete();          return true;      }       /**       * 拷貝一個文件,srcFile源文件，destFile目標文件       * @param path       * @throws IOException       */      public boolean copyFileTo(File srcFile, File destFile) throws IOException {          if (srcFile.isDirectory() || destFile.isDirectory())              return false;// 判斷是不是文件          FileInputStream fis = new FileInputStream(srcFile);          FileOutputStream fos = new FileOutputStream(destFile);          int readLen = 0;          byte[] buf = new byte[1024];          while ((readLen = fis.read(buf)) != -1) {              fos.write(buf, 0, readLen);          }          fos.flush();          fos.close();          fis.close();          return true;      }       /**       * 拷貝目錄下的全部文件到指定目錄       *        * @param srcDir       * @param destDir       * @return       * @throws IOException       */      public boolean copyFilesTo(File srcDir, File destDir) throws IOException {          if (!destDir.exists()) {              destDir.mkdirs();           }          if (!srcDir.isDirectory() || !destDir.isDirectory())              return false;// 判斷是不是目錄           File[] srcFiles = srcDir.listFiles();          for (int i = 0; i < srcFiles.length; i++) {              if (srcFiles[i].isFile()) {                  // 得到目標文件                  File destFile = new File(destDir.getPath() + "//"                          + srcFiles[i].getName());                  copyFileTo(srcFiles[i], destFile);              } else if (srcFiles[i].isDirectory()) {                  File theDestDir = new File(destDir.getPath() + "//"                          + srcFiles[i].getName());                  copyFilesTo(srcFiles[i], theDestDir);              }          }          return true;      }       /**       * 移動一個文件       *        * @param srcFile       * @param destFile       * @return       * @throws IOException       */      public boolean moveFileTo(File srcFile, File destFile) throws IOException {          boolean iscopy = copyFileTo(srcFile, destFile);          if (!iscopy)              return false;          delFile(srcFile);          return true;      }       /**       * 移動目錄下的全部文件到指定目錄       * @param srcDir       * @param destDir       * @return       * @throws IOException       */      public boolean moveFilesTo(File srcDir, File destDir) throws IOException {          if (!srcDir.isDirectory() || !destDir.isDirectory()) {              return false;          }          File[] srcDirFiles = srcDir.listFiles();          for (int i = 0; i < srcDirFiles.length; i++) {              if (srcDirFiles[i].isFile()) {                  File oneDestFile = new File(destDir.getPath() + "//"                          + srcDirFiles[i].getName());                  moveFileTo(srcDirFiles[i], oneDestFile);                  delFile(srcDirFiles[i]);              } else if (srcDirFiles[i].isDirectory()) {                  File oneDestFile = new File(destDir.getPath() + "//"                          + srcDirFiles[i].getName());                  moveFilesTo(srcDirFiles[i], oneDestFile);                  delDir(srcDirFiles[i]);              }           }          return true;      }  }