Android文件夹管理器源码实现

Posted Jimmy.li

tags:

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一、资源管理器介绍

    现在在一些移动终端上面都会有自带的资源管理器,其实其并非是android系统自带,而是手机产商与app开发商的合作而导致融合,借助第三方的开发软件预装在出厂的手机,是新时代下的另一个霸王条款,还不能自行删除,十分麻烦。

背景铺垫完毕,由于十分讨厌这种不公平的手段,为此自行写一个实现文件资源管理器,功能基本上实现,实用不美观,不喜勿喷!

二、实现函数详解

1、显示文件列表

/**
     * 扫描显示文件列表
     * @param path
     */
    private void showFileDir(String path) {
        mFileName = new ArrayList<String>();
        mFilePath = new ArrayList<String>();
        File file = new File(path);

        File[] files = file.listFiles();
        //如果当前目录不是根目录
        if (!ROOT_PATH.equals(path)) {
            mFileName.add("@1");
            mFilePath.add(ROOT_PATH);
            mFileName.add("@2");
            mFilePath.add(file.getParent());
        }
        //添加所有文件
        for (File f : files) {
            mFileName.add(f.getName());
            mFilePath.add(f.getPath());
        }
        this.setListAdapter(new MyAdapter(this, mFileName, mFilePath));
    }

2Item点击事件

/**
     * 点击事件
     * @param l
     * @param v
     * @param position
     * @param id
     */
    @Override
    protected void onListItemClick(ListView l, View v, int position, long id) {
        String path = mFilePath.get(position);
        File file = new File(path);
        // 文件存在并可读
        if (file.exists() && file.canRead()) {
            if (file.isDirectory()) {
                //显示子目录及文件
                showFileDir(path);
            } else {
                //处理文件
                fileHandle(file);
            }
        }
        //没有权限
        else {
            Resources res = getResources();
            new AlertDialog.Builder(this).setTitle("Message")
                    .setMessage(res.getString(R.string.no_permission))
                    .setPositiveButton("OK", new DialogInterface.OnClickListener() {
                        @Override
                        public void onClick(DialogInterface dialog, int which) {
                            Toast.makeText(getApplicationContext(), "没有权限删除不了..", Toast.LENGTH_SHORT).show();
                        }
                    }).show();
        }
        super.onListItemClick(l, v, position, id);
    }

3、对文件进行重命名

public void onClick(DialogInterface dialog, int which) {
                // 打开文件
                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());

                    DialogInterface.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()) {
                                //排除没有修改情况
                                if (!modifyName.equals(file.getName())) {
                                    new AlertDialog.Builder(MainActivity.this)
                                            .setTitle("注意!")
                                            .setMessage("文件名已存在,是否覆盖?")
                                            .setPositiveButton("确定", 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("重命名失败!");
                                                    }
                                                }
                                            })
                                            .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("重命名失败!");
                                }
                            }
                        }
                    };
                    AlertDialog renameDialog = new AlertDialog.Builder(MainActivity.this).create();
                    renameDialog.setView(view);
                    renameDialog.setButton("确定", listener2);
                    renameDialog.setButton2("取消", new DialogInterface.OnClickListener() {
                        @Override
                        public void onClick(DialogInterface dialog, int which) {
                            // TODO Auto-generated method stub
                        }
                    });
                    renameDialog.show();
                }

4、对文件进行删除

public void onClick(DialogInterface dialog, int which) {
                // 打开文件
                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());

                    DialogInterface.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()) {
                                //排除没有修改情况
                                if (!modifyName.equals(file.getName())) {
                                    new AlertDialog.Builder(MainActivity.this)
                                            .setTitle("注意!")
                                            .setMessage("文件名已存在,是否覆盖?")
                                            .setPositiveButton("确定", 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("重命名失败!");
                                                    }
                                                }
                                            })
                                            .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("重命名失败!");
                                }
                            }
                        }
                    };
                    AlertDialog renameDialog = new AlertDialog.Builder(MainActivity.this).create();
                    renameDialog.setView(view);
                    renameDialog.setButton("确定", listener2);
                    renameDialog.setButton2("取消", new DialogInterface.OnClickListener() {
                        @Override
                        public void onClick(DialogInterface dialog, int which) {
                            // TODO Auto-generated method stub
                        }
                    });
                    renameDialog.show();
                }

5、打开文件

 //打开文件
    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);
    }

6onCreateOptionsMenu重写,实现新建文件夹

public static void createMkdir(String folderPath) {
        File folder = new File(folderPath);
        if (!folder.exists()) {
            folder.mkdir();
        }
    }

三、实现步骤

1activity_main.xml,主界面布局,最重要的既是ListView浏览方式。

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:orientation="vertical"
    tools:context="example.com.filemanager.MainActivity">

    <ListView
        android:id="@android:id/list"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        />
</LinearLayout>

2file.xml,Item的布局方式。

<?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="40dp"
    android:orientation="horizontal">

    <ImageView
        android:id="@+id/imageView"
        android:layout_width="40dp"
        android:layout_height="40dp"
        android:layout_gravity="center_vertical"/>
    <TextView
        android:id="@+id/textView"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center_vertical"
        android:layout_marginLeft="10dp"
        android:textSize="20sp"/>

</LinearLayout>

3rename_dialog.xml,自定义Dialog方式。

<?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>

4MainActivity.java,主Activity,所有事项函数。

package example.com.filemanager;

import android.app.AlertDialog;
import android.app.ListActivity;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.res.Resources;
import android.net.Uri;
import android.os.Bundle;
import android.os.Environment;
import android.view.KeyEvent;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.EditText;
import android.widget.ListView;
import android.widget.Toast;

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

public class MainActivity extends ListActivity {
    private static final String ROOT_PATH = "/";
    //存储文件名称
    private ArrayList<String> mFileName = null;
    //存储文件路径
    private ArrayList<String> mFilePath = null;
    //重命名布局xml文件显示dialog
    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.activity_main);
        //显示文件列表
        showFileDir(ROOT_PATH);
    }

    /**
     * 扫描显示文件列表
     * @param path
     */
    private void showFileDir(String path) {
        mFileName = new ArrayList<String>();
        mFilePath = new ArrayList<String>();
        File file = new File(path);

        File[] files = file.listFiles();
        //如果当前目录不是根目录
        if (!ROOT_PATH.equals(path)) {
            mFileName.add("@1");
            mFilePath.add(ROOT_PATH);
            mFileName.add("@2");
            mFilePath.add(file.getParent());
        }
        //添加所有文件
        for (File f : files) {
            mFileName.add(f.getName());
            mFilePath.add(f.getPath());
        }
        this.setListAdapter(new MyAdapter(this, mFileName, mFilePath));
    }

    /**
     * 点击事件
     * @param l
     * @param v
     * @param position
     * @param id
     */
    @Override
    protected void onListItemClick(ListView l, View v, int position, long id) {
        String path = mFilePath.get(position);
        File file = new File(path);
        // 文件存在并可读
        if (file.exists() && file.canRead()) {
            if (file.isDirectory()) {
                //显示子目录及文件
                showFileDir(path);
            } else {
                //处理文件
                fileHandle(file);
            }
        }
        //没有权限
        else {
            Resources res = getResources();
            new AlertDialog.Builder(this).setTitle("Message")
                    .setMessage(res.getString(R.string.no_permission))
                    .setPositiveButton("OK", new DialogInterface.OnClickListener() {
                        @Override
                        public void onClick(DialogInterface dialog, int which) {
                            Toast.makeText(getApplicationContext(), "没有权限删除不了..", Toast.LENGTH_SHORT).show();
                        }
                    }).show();
        }
        super.onListItemClick(l, v, position, id);
    }

    //对文件进行增删改
    private void fileHandle(final File file) {
        DialogInterface.OnClickListener listener = new DialogInterface.OnClickListener() {
            @Override
            public void onClick(DialogInterface dialog, int which) {
                // 打开文件
                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());

                    DialogInterface.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()) {
                                //排除没有修改情况
                                if (!modifyName.equals(file.getName())) {
                                    new AlertDialog.Builder(MainActivity.this)
                                            .setTitle("注意!")
                                            .setMessage("文件名已存在,是否覆盖?")
                                            .setPositiveButton("确定", 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("重命名失败!");
                                                    }
                                                }
                                            })
                                            .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("重命名失败!");
                                }
                            }
                        }
                    };
                    AlertDialog renameDialog = new AlertDialog.Builder(MainActivity.this).create();
                    renameDialog.setView(view);
                    renameDialog.setButton("确定", listener2);
                    renameDialog.setButton2("取消", new DialogInterface.OnClickListener() {
                        @Override
                        public void onClick(DialogInterface dialog, int which) {
                            // TODO Auto-generated method stub
                        }
                    });
                    renameDialog.show();
                }
                //删除文件
                else {
                    new AlertDialog.Builder(MainActivity.this)
                            .setTitle("注意!")
                            .setMessage("确定要删除此文件吗?")
                            .setPositiveButton("确定", new DialogInterface.OnClickListener() {
                                @Override
                                public void onClick(DialogInterface dialog, int which) {
                                    if (file.delete()) {
                                        //更新文件列表
                                        showFileDir(file.getParent());
                                        displayToast("删除成功!");
                                    } else {
                                        displayToast("删除失败!");
                                    }
                                }
                            })
                            .setNegativeButton("取消", new DialogInterface.OnClickListener() {
                                @Override
                                public void onClick(DialogInterface dialog, int which) {
                                }
                            }).show();
                }
            }
        };
        //选择文件时,弹出增删该操作选项对话框
        String[] menu = {"打开文件", "重命名", "删除文件"};
        new AlertDialog.Builder(MainActivity.this)
                .setTitle("请选择要进行的操作!")
                .setItems(menu, listener)
                .setPositiveButton("取消", new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialog, int which) {
                    }
                }).show();
    }

    //打开文件
    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);
    }

    //获取文件mimetype
    private String getMIMEType(File file) {
        String type = "";
        String name = file.getName();
        //文件扩展名
        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 {
            //如果无法直接打开,跳出列表由用户选择
            type = "*";
        }
        type += "/*";
        return type;
    }

    private void displayToast(String message) {
        Toast.makeText(MainActivity.this, message, Toast.LENGTH_SHORT).show();
    }

    public boolean onCreateOptionsMenu(Menu menu) {
        //super.getMenuInflater().inflate(R.menu.main_menu, menu);
        menu.add(Menu.NONE, Menu.FIRST + 1, 7, "新建")
                .setIcon(android.R.drawable.ic_menu_send);
        menu.add(Menu.NONE, Menu.FIRST + 2, 3, "取消")
                .setIcon(android.R.drawable.ic_menu_edit);
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        switch (item.getItemId()) {
            case Menu.FIRST + 1:{
                final EditText editText = new EditText(MainActivity.this);
                new AlertDialog.Builder(MainActivity.this).setTitle("请输入文件名称").setView(editText).setPositiveButton("确定",
                        new DialogInterface.OnClickListener() {
                            @Override
                            public void onClick(DialogInterface dialog, int which) {
                                // TODO Auto-generated method stub
                                String mFileName = editText.getText().toString();
                                String IMAGES_PATH = Environment.getExternalStorageDirectory() + "/" + mFileName + "/";       //获取根目录
                                //String IMAGES_PATH = getApplicationContext().getFilesDir().getAbsolutePath() + "/" + mFileName + "/";
                                createMkdir(IMAGES_PATH);
                            }
                        }).setNegativeButton("取消", null).show();
            }
                break;
            case Menu.FIRST + 2:
                Toast.makeText(this, "取消", Toast.LENGTH_LONG).show();
                break;
        }
        return false;
    }
    public static void createMkdir(String folderPath) {
        File folder = new File(folderPath);
        if (!folder.exists()) {
            folder.mkdir();
        }
    }

        public boolean onKeyDown(int keyCode, KeyEvent event) {
            if (keyCode == KeyEvent.KEYCODE_BACK && event.getRepeatCount() == 0) {
                finish();
                return true;
            } else {
                return super.onKeyDown(keyCode, event);
        }
    }
}

5MyAdapter.java

package example.com.filemanager;

import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Matrix;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.ImageView;
import android.widget.TextView;

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

/**
 * Title: FileManager
 * Package example.com.filemanager
 * Description: ${TODO}
 * author Jimmy.li
 * Date: 2016-06-23
 * Time: 14:16
 * version V1.0
 */
public class MyAdapter extends BaseAdapter {
    private LayoutInflater inflater;
    private Bitmap directory, file;
    //存储文件名称
    private ArrayList<String> names = null;
    //存储文件路径
    private ArrayList<String> paths = null;

    //参数初始化
    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);
        //缩小图片
        directory = small(directory, 0.16f);
        file = small(file, 0.1f);
        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);
    }
}

四、添加权限

 <uses-permission android:name="android.permission.MOUNT_UNMOUNT_FILESYSTEMS"/>
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>

五、实现效果图

               

          

六、源码下载地址

源码下载地址:http://download.csdn.net/detail/u012721519/9557887



Good luck!

Write by Jimmy.li