android简易文件管理器实例(列表式文件目录)

核心代码：

file fatherfile = new file(path);file[] files = fatherfile.listfiles();

效果图：

实现这种列表式的目录，用直接读取目录下文件方法会比较简单，但是如果要根据文件类型从所有文件中分类，那就用contentprovider去查询数据库方式会更有效率；

实现代码：

filelistactivity.java

package com.example.d_readandwritetextfile;

import java.io.file;
import java.util.arraylist;

import com.example.d_readandwritetextfile.entity.fileentity;
import com.example.d_readandwritetextfile.entity.fileentity.type;

import android.app.activity;
import android.content.context;
import android.os.bundle;
import android.os.environment;
import android.os.handler;
import android.os.message;
import android.view.layoutinflater;
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;

/**
 * 文件列表 界面
 * @author administrator
 *
 */
public class filelistactivity extends activity implements onclicklistener{
	
	private listview mlistview;
	private button btncomfirm;
	private myfileadapter madapter;
	private context mcontext;
	private file currentfile;
	string sdrootpath;
	
	private arraylist<fileentity> mlist;
	
	private handler mhandler;
	
	@override
	protected void oncreate(bundle savedinstancestate) {
		super.oncreate(savedinstancestate);
		setcontentview(r.layout.activity_filelist);
		mhandler = new handler(){
			@override
			public void handlemessage(message msg) {
				super.handlemessage(msg);
				switch (msg.what) {
				case 1:
					if(madapter ==null){
						madapter = new myfileadapter(mcontext, mlist);
						mlistview.setadapter(madapter);
					}else{
						madapter.notifydatasetchanged();
					}
					
					break;
				case 2:
					
					break;

				default:
					break;
				}
			}
		};
		
		mcontext = this;
		mlist = new arraylist<>();
		sdrootpath =environment.getexternalstoragedirectory().getabsolutepath();
		currentfile = new file(sdrootpath);
		system.out.println(sdrootpath);
		initview();
		getdata(sdrootpath);
		
		
	}
	
	@override
	public void onbackpressed() {
//		super.onbackpressed();
		system.out.println("onbackpressed...");
		if(sdrootpath.equals(currentfile.getabsolutepath())){
			system.out.println("已经到了根目录...");
			return ;
		}
		
		string parentpath = currentfile.getparent();
		currentfile = new file(parentpath);
		getdata(parentpath);
	}
	
	private void initview() {
		mlistview = (listview) findviewbyid(r.id.listview1);
		btncomfirm = (button) findviewbyid(r.id.button1);
		
		mlistview.setonitemclicklistener(new onitemclicklistener() {

			@override
			public void onitemclick(adapterview<?> parent, view view,
					int position, long id) {
				final fileentity entity = mlist.get(position);
				if(entity.getfiletype() == type.floder){
					currentfile = new file(entity.getfilepath());
					getdata(entity.getfilepath());
				}else if(entity.getfiletype() == type.file){
					
					runonuithread(new runnable() {
						
						@override
						public void run() {
							toast.maketext(mcontext, entity.getfilepath()+" "+entity.getfilename(),
									1).show();
						}
					});
				}
				
			}
		});
	}
	
	private void getdata(final string path) {
		new thread(){
			@override
			public void run() {
				super.run();
				
				findallfiles(path);
			}
		}.start();

	}

	@override
	public void onclick(view v) {
		switch (v.getid()) {
		case r.id.button1:
			setresult(100);
			finish();
			break;

		default:
			break;
		}
		
	}
	
	/**
	 * 查找path地址下所有文件
	 * @param path
	 */
	public void findallfiles(string path) {
		mlist.clear();
		
		if(path ==null ||path.equals("")){
			return;
		}
		file fatherfile = new file(path);
		file[] files = fatherfile.listfiles();
		if (files != null && files.length > 0) {
			for (int i = 0; i < files.length; i++) {
				fileentity entity = new fileentity();
				boolean isdirectory = files[i].isdirectory();
				if(isdirectory ==true){
					entity.setfiletype(type.floder);
//					entity.setfilename(files[i].getpath());
				}else{
					entity.setfiletype(type.file);
				}
				entity.setfilename(files[i].getname().tostring());
				entity.setfilepath(files[i].getabsolutepath());
				entity.setfilesize(files[i].length()+"");
				mlist.add(entity);
			}
		}
		mhandler.sendemptymessage(1);
		
	}
	
	
	class myfileadapter extends baseadapter {
		private context mcontext;
		private arraylist<fileentity> malist;
		private layoutinflater minflater;
		
		

		public myfileadapter(context mcontext, arraylist<fileentity> mlist) {
			super();
			this.mcontext = mcontext;
			this.malist = mlist;
			minflater = layoutinflater.from(mcontext);
		}

		@override
		public int getcount() {
			// todo auto-generated method stub
			return malist.size();
		}

		@override
		public object getitem(int position) {
			// todo auto-generated method stub
			return malist.get(position);
		}

		@override
		public long getitemid(int position) {
			return position;
		}

		@override
		public int getitemviewtype(int position) {
			if(malist.get(position).getfiletype() == type.floder){
				return 0;
			}else{
				return 1;
			}
		}
		
		@override
		public int getviewtypecount() {
			return 2;
		}
		
		@override
		public view getview(int position, view convertview, viewgroup parent) {
//			system.out.println("position-->"+position+"  ---convertview--"+convertview);
			viewholder holder = null;
			int type = getitemviewtype(position);
			fileentity entity = malist.get(position);
			
			if(convertview == null){
				holder = new viewholder();
				switch (type) {
				case 0://folder
					convertview = minflater.inflate(r.layout.item_listview, parent, false);
					holder.iv = (imageview) convertview.findviewbyid(r.id.item_imageview);
					holder.tv = (textview) convertview.findviewbyid(r.id.item_textview);
					break;
				case 1://file
					convertview = minflater.inflate(r.layout.item_listview, parent, false);
					holder.iv = (imageview) convertview.findviewbyid(r.id.item_imageview);
					holder.tv = (textview) convertview.findviewbyid(r.id.item_textview);
					
					break;

				default:
					break;
					
				}
				convertview.settag(holder);
			}else {
				holder = (viewholder) convertview.gettag();
			}
			
			switch (type) {
			case 0:
				holder.iv.setimageresource(r.drawable.folder_125);
				holder.tv.settext(entity.getfilename());
				break;
			case 1:
				holder.iv.setimageresource(r.drawable.file);
				holder.tv.settext(entity.getfilename());
				
				break;

			default:
				break;
			}
			
			
			return convertview;
		}
		
	}
	
	class viewholder {
		imageview iv;
		textview tv;
	}

}

fileentity.java

package com.example.d_readandwritetextfile.entity;

public class fileentity {
	
	public enum type{
		floder,file
	}
	private string filepath;
	private string filename;
	private string filesize;
	private type filetype;
	
	
	public string getfilepath() {
		return filepath;
	}
	public void setfilepath(string filepath) {
		this.filepath = filepath;
	}
	public string getfilename() {
		return filename;
	}
	public void setfilename(string filename) {
		this.filename = filename;
	}
	public string getfilesize() {
		return filesize;
	}
	public void setfilesize(string filesize) {
		this.filesize = filesize;
	}
	public type getfiletype() {
		return filetype;
	}
	public void setfiletype(type filetype) {
		this.filetype = filetype;
	}
	
	

}

activity_filelist.xml

<?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"
  android:orientation="vertical" >

  <relativelayout
    android:layout_width="match_parent"
    android:layout_height="60dp" >

    <button
      android:id="@+id/button1"
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:layout_alignparentbottom="true"
      android:layout_alignparentright="true"
      android:layout_marginright="14dp"
      android:onclick="onclick"
      android:text="确定" />
    
    <view 
      android:layout_width="match_parent"
      android:layout_height="1dp"
      android:background="#666"
      android:layout_alignparentbottom="true"
      />

  </relativelayout>

  <listview
    android:id="@+id/listview1"
    android:layout_width="match_parent"
    android:layout_height="wrap_content" >
  </listview>

</linearlayout>

item_listview.xml

<?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="50dp"
  android:orientation="horizontal" >

  <imageview
    android:id="@+id/item_imageview"
    android:layout_width="50dp"
    android:layout_height="50dp"
    android:layout_marginleft="10dp"
    android:src="@drawable/folder_125" 
    android:scaletype="fitxy"
    />

  <textview
    android:id="@+id/item_textview"
    android:layout_width="wrap_content"
    android:layout_height="match_parent"
    android:layout_marginleft="10dp"
    android:text="textview"
    android:gravity="center"
     />

</linearlayout>

以上这篇android简易文件管理器实例(列表式文件目录)就是小编分享给大家的全部内容了，希望能给大家一个参考，也希望大家多多支持。