本文实例讲述了Android编程实现简单文件浏览器功能。分享给大家供大家参考，具体如下：
运行效果：
布局：
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical"
android:layout_gravity="center_horizontal"
tools:context=".MainActivity" >
<TextView
android:id="@+id/txt1"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
<ImageButton
android:id="@+id/imageBt1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="@drawable/home"/>
<ListView
android:id="@+id/listFile"
android:layout_width="wrap_content"
android:layout_height="wrap_content" >
</ListView>
</LinearLayout>
<?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="horizontal" >
<ImageView
android:id="@+id/images"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
<TextView
android:id="@+id/txtview"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
</LinearLayout>
java代码：
package com.android.xiong.sdfilelook;
import java.io.File;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import android.app.Activity;
import android.os.Bundle;
import android.os.Environment;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.ImageButton;
import android.widget.ImageView;
import android.widget.ListView;
import android.widget.SimpleAdapter;
import android.widget.TextView;
public class MainActivity extends Activity {
private ListView listfile;
//当前文件目录
private String currentpath;
private TextView txt1;
private ImageView images;
private TextView textview;
private ImageButton imagebt1;
private int[] img = { R.drawable.file, R.drawable.folder, R.drawable.home };
private File[] files;
private SimpleAdapter simple;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
listfile = (ListView) findViewById(R.id.listFile);
txt1 = (TextView) findViewById(R.id.txt1);
imagebt1 = (ImageButton) findViewById(R.id.imageBt1);
init(Environment.getExternalStorageDirectory());
listfile.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> arg0, View arg1, int arg2,
long arg3) {
// TODO Auto-generated method stub
// 获取单击的文件或文件夹的名称
String folder = ((TextView) arg1.findViewById(R.id.txtview))
.getText().toString();
try {
File filef = new File(currentpath + '/'
+ folder);
init(filef);
} catch (Exception e) {
e.printStackTrace();
}
}
});
//回根目录
imagebt1.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
init(Environment.getExternalStorageDirectory());
}
});
}
// 界面初始化
public void init(File f) {
if (Environment.getExternalStorageState().equals(
Environment.MEDIA_MOUNTED)) {
// 获取SDcard目录下所有文件名
files = f.listFiles();
if (!files.equals(null)) {
currentpath=f.getPath();
txt1.setText("当前目录为:"+f.getPath());
List<Map<String, Object>> list = new ArrayList<Map<String, Object>>();
for (int i = 0; i < files.length; i++) {
Map<String, Object> maps = new HashMap<String, Object>();
if (files[i].isFile())
maps.put("image", img[0]);
else
maps.put("image", img[1]);
maps.put("filenames", files[i].getName());
list.add(maps);
}
simple = new SimpleAdapter(this, list,
R.layout.fileimageandtext, new String[] { "image",
"filenames" }, new int[] { R.id.images,
R.id.txtview });
listfile.setAdapter(simple);
}
} else {
System.out.println("该文件为空");
}
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
}
权限控制：
<!-- 在SDCard中创建与删除文件权限 --> <uses-permission android:name="android.permission.MOUNT_UNMOUNT_FILESYSTEMS" /> <!-- 往SDCard写入数据权限 --> <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
更多关于Android权限控制可参考Android权限描述大全
更多关于Android相关内容感兴趣的读者可查看本站专题：《Android文件操作技巧汇总》、《Android视图View技巧总结》、《Android编程之activity操作技巧总结》、《Android布局layout技巧总结》、《Android开发入门与进阶教程》、《Android资源操作技巧汇总》及《Android控件用法总结》
希望本文所述对大家Android程序设计有所帮助。
