Android File文件操作

<?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"><TextView android:layout_width="fill_parent"android:id="@+id/TextView"android:background="#ffff00"android:layout_height="wrap_content" android:text="@string/hello" /><ListView android:id="@android:id/list"android:layout_width="fill_parent"android:layout_height="wrap_content"></ListView></LinearLayout>

package com.Aina.Android;import java.io.File;import java.util.ArrayList;import java.util.List;import android.app.AlertDialog;import android.app.ListActivity;import android.content.DialogInterface;import android.os.Bundle;import android.view.View;import android.widget.ArrayAdapter;import android.widget.ListView;import android.widget.TextView;public class Test_ListFile extends ListActivity {/** Called when the activity is first created. */private List<String> items = null;//存放名称private List<String> paths = null;//存放路径private String rootPath = "/";private TextView tv;@Overridepublic void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.main);tv = (TextView) this.findViewById(R.id.TextView);this.getFileDir(rootPath);//获取rootPath目录下的文件.}public void getFileDir(String filePath) {try{this.tv.setText("当前路径:"+filePath);// 设置当前所在路径items = new ArrayList<String>();paths = new ArrayList<String>();File f = new File(filePath);File[] files = f.listFiles();// 列出所有文件// 如果不是根目录,则列出返回根目录和上一目录选项if (!filePath.equals(rootPath)) {items.add("返回根目录");paths.add(rootPath);items.add("返回上一层目录");paths.add(f.getParent());}// 将所有文件存入list中if(files != null){int count = files.length;// 文件个数for (int i = 0; i < count; i++) {File file = files[i];items.add(file.getName());paths.add(file.getPath());}}ArrayAdapter<String> adapter = new ArrayAdapter<String>(this,android.R.layout.simple_list_item_1, items);this.setListAdapter(adapter);}catch(Exception ex){ex.printStackTrace();}}@Overrideprotected void onListItemClick(ListView l, View v, int position, long id) {super.onListItemClick(l, v, position, id);String path = paths.get(position);File file = new File(path);//如果是文件夹就继续分解if(file.isDirectory()){this.getFileDir(path);}else{new AlertDialog.Builder(this).setTitle("提示").setMessage(file.getName()+" 是一个文件！").setPositiveButton("OK", new DialogInterface.OnClickListener(){public void onClick(DialogInterface dialog, int which) {}}).show();}}}

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