介绍 package com.zxl;
import java.io.File;
import java.util.ArrayList;
import java.util.HashMap;
import android.app.Activity;
import android.os.Bundle;
import android.os.Environment;
import android.util.Log;
import android.widget.ListView;
import android.widget.SimpleAdapter;
public class Txt_sdkaActivity extends Activity {
private 才能;ListView lv;
ArrayList 才能,名字;/* *,才能nbsp; when 从而activity is first 创建只*/@Override才能
public 才能;void onCreate (Bundle savedInstanceState), {
,,,super.onCreate (savedInstanceState);
,,,setContentView (R.layout.main);
,,,lv =,(视图),findViewById (R.id.lv);
,,,name =, new ArrayList ();
,,,if (Environment.getExternalStorageState () .equals (Environment.MEDIA_MOUNTED)), {
,,,,,File path =, Environment.getExternalStorageDirectory();//,获得SD卡路径
,,,,,//,File path =, new 文件(“/mnt/sdcard/?;
,,,,,文件[],files =, path.listFiles();//,读取
,,,,,getFileName(文件);
,,,}
,,,SimpleAdapter adapter =, new SimpleAdapter(名称,这一点,还以为,R.layout.pes, new String [], {,“Name",},, new int [], {, R.id.txt_tv });
,,,lv.setAdapter(适配器);
,,,for (int 小姐:=,0;,小姐:& lt;, name.size();,我+ +),{
,,,,,Log.i (“zeng",,“列表只名字:,“,+,name.get(我));
,,,}
,,}
private 才能;void getFileName(文件[],文件),{
,,,if (files !=, null),{//,先判断目录是否为空,否则会报空指针
,,,,,for (File File :文件),{
,,,,,,,if (file.isDirectory ()), {
,,,,,,,,,Log.i (“zeng",,“若是文件目录。继续读1“,+,file.getName () .toString (), +, file.getPath () .toString ());
,,,,,,,,,getFileName (file.listFiles ());
,,,,,,,,,Log.i (“zeng",,“若是文件目录。继续读2“,+,file.getName () .toString (), +, file.getPath () .toString ());
,,,,,,,},{else
,,,,,,,,,String fileName =, file.getName ();
,,,,,,,,,if (fileName.endsWith (“.txt")), {
,,,,,,,,,,,HashMap map =, new HashMap ();
,,,,,,,,,,,String s =, fileName.substring (0,, fileName.lastIndexOf (“!”)) .toString ();
,,,,,,,,,,,Log.i (“zeng",,“文件名txt::,,,, +, s);
,,,,,,,,,,,map.put (“Name",, fileName .substring (0,, fileName.lastIndexOf (“!”)));
,,,,,,,,,,,name.add(地图);
,,,,,,,,,}
,,,,,,,}
,,,,,}
,,,}
,,}
} & lt; ? xml version=?.0“,编码=皍tf-8" ?比;
& lt; RelativeLayout xmlns: android=癶ttp://schemas.android.com/apk/res/android"
android:才能layout_width=癴ill_parent"
android:才能layout_height=癴ill_parent"
android:才能取向=皏ertical",在
& lt; TextView才能
,,,android: id=癅 + id/textView1"
,,,android: layout_width=癴ill_parent"
,,,android: layout_height=皐rap_content"
,,,android:文本=癅string/hello",/比;
,& lt;列表视图
,,,android: id=癅 + id/lv"
,,,android: layout_width=癿atch_parent"
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这篇文章将为大家详细讲解有关Android如何实现读取SD卡下所有三种文件名并用listView显示出来的方法,小编觉得挺实用的,因此分享给大家做个参考,希望大家阅读完这篇文章后可以有所收获。
具体如下:
MainActivity。Java
主要。xml
