android简易文件管理器实例(列表式文件目录)
程序员文章站
2023-08-15 10:30:20
核心代码：
file fatherfile = new file(path);file[] files = fatherfile.listfiles();
效果图：...
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。