实例介绍
【实例简介】
【实例截图】
【核心代码】
package com.itensen.test;
import java.io.File;
import java.io.IOException;
import java.lang.reflect.Array;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.Comparator;
import android.R.integer;
import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.net.Uri;
import android.os.Bundle;
import android.text.style.ClickableSpan;
import android.util.Log;
import android.view.KeyEvent;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.AdapterView.OnItemLongClickListener;
import android.widget.BaseAdapter;
import android.widget.ImageView;
import android.widget.ListView;
import android.widget.TextView;
import android.widget.Toast;
public class GetSDTreeActivity extends Activity {
//根目录
File sdRoot;
//存放当前路径下的所有文件及文件夹
File[] datas;
//当前路径
File nowFile;
//当前长按的文件/文件夹
File longFile;
ListView listView;
int lastPoint=0;
boolean isBack=false;
MyAdapater adapater;
//匹配图标时用到的文件类型
String[] fileTypes=new String[]{"apk","avi","bat","bin","bmp","chm","css","dat","dll","doc","docx","dos","dvd","gif","html","ifo","inf","iso"
,"java","jpeg","jpg","log","m4a","mid","mov","movie","mp2","mp2v","mp3","mp4","mpe","mpeg","mpg","pdf","php","png","ppt","pptx","psd","rar","tif","ttf"
,"txt","wav","wma","wmv","xls","xlsx","xml","xsl","zip"
};
//长按弹出菜单的内容
String[] menus=null;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
listView =(ListView)findViewById(R.id.list);
listView.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> arg0, View arg1, int arg2,
long arg3) {
File clickFile=datas[arg2];
Log.i("test", clickFile.getName());
if(clickFile.isDirectory()){
lastPoint=arg2;
loadFiles(clickFile);
}else{
openFile(clickFile);
}
}
});
listView.setOnItemLongClickListener(new OnItemLongClickListener(){
@Override
public boolean onItemLongClick(AdapterView<?> arg0, View arg1,
int arg2, long arg3) {
File clickFile=datas[arg2];
Log.i("test", clickFile.getName());
longFile=clickFile;
if(clickFile.isDirectory()){
menus=new String[]{"删除","重命名"};
Intent openMenu=new Intent(GetSDTreeActivity.this,MenuActivity.class);
openMenu.putExtra("menus", menus);
startActivityForResult(openMenu, 1);
}else{
menus=new String[]{"删除","重命名"};
Intent openMenu=new Intent(GetSDTreeActivity.this,MenuActivity.class);
openMenu.putExtra("menus", menus);
startActivityForResult(openMenu, 2);
}
return false;
}
});
sdRoot=new File("/sdcard");
if(sdRoot.exists()){
loadFiles(sdRoot);
}
}
void loadFiles(File directory){
nowFile=directory;
setTitle(nowFile.getPath());
//分类并排序
File[] temp=directory.listFiles();
ArrayList<File> tempFolder=new ArrayList<File>();
ArrayList<File> tempFile=new ArrayList<File>();
for(int i=0;i<temp.length;i ){
File file=temp[i];
if(file.isDirectory()){
tempFolder.add(file);
}else if(file.isFile()){
tempFile.add(file);
}
}
//对List进行排序
Comparator<File> comparator=new MyComparator();
Collections.sort(tempFolder, comparator);
Collections.sort(tempFile, comparator);
datas=new File[tempFolder.size() tempFile.size()];
System.arraycopy(tempFolder.toArray(), 0, datas, 0, tempFolder.size());
System.arraycopy(tempFile.toArray(), 0, datas,tempFolder.size(), tempFile.size());
//数据处理结束 =========================================
adapater=new MyAdapater(GetSDTreeActivity.this);
listView.setAdapter(adapater);
if (isBack) {
//listView.setSelection(lastPoint);
listView.smoothScrollToPosition(lastPoint);
lastPoint=0;
isBack=false;
}
//adapater.notifyDataSetChanged();
}
//自定义比较器
class MyComparator implements Comparator<File>{
@Override
public int compare(File lhs, File rhs) {
return lhs.getName().compareTo(rhs.getName());
}
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
menu.add("新建");
menu.add("退出");
return super.onCreateOptionsMenu(menu);
}
@Override
public boolean onMenuItemSelected(int featureId, MenuItem item) {
if(item.getTitle().toString().equals("退出")){
GetSDTreeActivity.this.finish();
System.exit(1);
}else if(item.getTitle().toString().equals("新建")){
String name=System.currentTimeMillis() "";
File file=new File(nowFile.getPath() "/" name.substring(name.length()-5));
try {
boolean finish=file.createNewFile();
loadFiles(nowFile);
if(finish){
Toast.makeText(this, "随机文件已生成！", Toast.LENGTH_SHORT).show();
}
} catch (IOException e) {
e.printStackTrace();
}
}
return super.onMenuItemSelected(featureId, item);
}
@Override
public boolean onKeyUp(int keyCode, KeyEvent event) {
switch (keyCode) {
case KeyEvent.KEYCODE_BACK:
String parent=nowFile.getParent();
if(parent.equals("/")){
return true;
}
isBack=true;
loadFiles(new File(parent));
Log.i("test",parent);
return true;
default:
break;
}
return super.onKeyUp(keyCode, event);
}
private void openFile(File f)
{
Intent intent = new Intent();
intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
intent.setAction(android.content.Intent.ACTION_VIEW);
/* 调用getMIMEType()来取得MimeType */
String type = getMIMEType(f);
/* 设置intent的file与MimeType */
intent.setDataAndType(Uri.fromFile(f),type);
startActivity(intent);
}
/* 判断文件MimeType的method */
private String getMIMEType(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MimeType */
if(end.equals("m4a")||end.equals("mp3")||end.equals("mid")||
end.equals("xmf")||end.equals("ogg")||end.equals("wav"))
{
type = "audio";
}
else if(end.equals("3gp")||end.equals("mp4"))
{
type = "video";
}
else if(end.equals("jpg")||end.equals("gif")||end.equals("png")||
end.equals("jpeg")||end.equals("bmp"))
{
type = "image";
}
else if(end.equals("apk"))
{
/* android.permission.INSTALL_PACKAGES */
type = "application/vnd.android.package-archive";
}
else if(end.equals("txt")||end.equals("java"))
{
/* android.permission.INSTALL_PACKAGES */
type = "text";
}
else
{
type="*";
}
/*如果无法直接打开，就跳出软件列表给用户选择 */
if(end.equals("apk"))
{
}
else
{
type = "/*";
}
return type;
}
// TODO onActivityResult
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
if(resultCode==RESULT_OK){
String exec=data.getStringExtra("exec");
switch (requestCode) {
//文件夹
case 1:
if(exec.equals("删除")){
if(longFile!=null){
if(longFile.exists()){
try {
File file=new File(longFile.getPath());
deleteFolder(file);
if(allFiles.size()==0){
boolean deleted= file.delete();
if(deleted)
Log.i("test",longFile.getName() "删除成功");
}else{
Log.i("test", "还有" allFiles.size() "个文件没删除");
}
} catch (Exception e) {
e.printStackTrace();
}
}
}
}else if(exec.equals("重命名")){
String path=longFile.getPath();
String name=data.getStringExtra("name");
//String fileType=path.substring(path.lastIndexOf("."));
File newFile=new File(longFile.getParent() "/" name);
longFile.renameTo(newFile);
}
break;
//文件
case 2:
if(exec.equals("删除")){
if(longFile!=null){
if(longFile.exists()){
try {
File file=new File(longFile.getPath());
boolean deleted= file.delete();
if(deleted)
Log.i("test",longFile.getName() "删除成功");
} catch (Exception e) {
e.printStackTrace();
}
}
}
}else if(exec.equals("重命名")){
String path=longFile.getPath();
String name=data.getStringExtra("name");
int index=path.lastIndexOf(".");
String fileType="";
if(index!=-1){
fileType=path.substring(index);
}
File newFile=new File(longFile.getParent() "/" name fileType);
longFile.renameTo(newFile);
}
break;
default:
break;
}
loadFiles(nowFile);
}
super.onActivityResult(requestCode, resultCode, data);
}
ArrayList<File> allFiles=new ArrayList<File>();
void getAllFiles(File path){
//递归取得目录下的所有文件及文件夹
File[] files=path.listFiles();
for(int i=0;i<files.length;i ){
File file=files[i];
allFiles.add(file);
if(file.isDirectory()){
getAllFiles(file);
}
}
Log.i("test", allFiles.size() "");
}
//TODO deleteFolder
void deleteFolder(File path){
getAllFiles(path);
while (allFiles.size()!=0) {
for(int i=0;i<allFiles.size();i ){
File file=allFiles.get(i);
if(file.isFile()){
boolean deleted= file.delete();
if(deleted)
allFiles.remove(i);
}else if(file.isDirectory()){
try {
boolean deleted= file.delete();
if(deleted)
allFiles.remove(i);
} catch (Exception e) {
e.printStackTrace();
}
}
}
}
}
// 自定义的BaseAdapter实现
class ViewHolder {
ImageView typeView;
TextView nameView;
}
// TODO --Class-- MyAdapater 自定义适配器
private class MyAdapater extends BaseAdapter {
LayoutInflater mInflater;
public MyAdapater(Context context) {
mInflater = LayoutInflater.from(context);
}
// TODO getView
@Override
public View getView(int position, View convertView, ViewGroup parent) {
ViewHolder holder;
if (convertView == null) {
convertView = mInflater.inflate(R.layout.item,
null);
holder = new ViewHolder();
holder.typeView = (ImageView) convertView
.findViewById(R.id.image_type);
holder.nameView = (TextView) convertView
.findViewById(R.id.text_name);
convertView.setTag(holder);
} else {
holder = (ViewHolder) convertView.getTag();
}
// 从arraylist集合里取出当前行数据；
File file=datas[position];
// 为页面控件设置数据
if(file.isDirectory()){
holder.typeView.setImageResource(R.drawable.folder);
}else{
holder.typeView.setImageResource(R.drawable.file);
String name=file.getName();
int pointIndex=name.lastIndexOf(".");
if(pointIndex!=-1){
String type=name.substring(pointIndex 1).toLowerCase();
for (int i = 0; i < fileTypes.length; i ) {
if(type.equals(fileTypes[i])){
try {
int resId = getResources().getIdentifier(type, "drawable" , getPackageName());
holder.typeView.setImageResource(resId);
} catch (Exception e) {
e.printStackTrace();
}
}
}
}
}
holder.nameView.setText(file.getName());
// 标示当前行是否被选中（通过显隐selectView实现）
return convertView;
}
@Override
public int getCount() {
return datas.length;
}
@Override
public Object getItem(int position) {
return datas[position];
}
@Override
public long getItemId(int position) {
return position;
}
}
}
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