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：

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" >

android:id="@+id/txt1"

android:layout_width="wrap_content"

android:layout_height="wrap_content" />

android:id="@+id/imageBt1"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:src="@drawable/home"/>

android:id="@+id/listFile"

android:layout_width="wrap_content"

android:layout_height="wrap_content" >

android:layout_width="match_parent"

android:layout_height="match_parent"

android:orientation="horizontal" >

android:id="@+id/images"

android:layout_width="wrap_content"

android:layout_height="wrap_content" />

android:id="@+id/txtview"

android:layout_width="wrap_content"

android:layout_height="wrap_content" />

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> list = new ArrayList>();

for (int i = 0; i < files.length; i++) {

Map maps = new HashMap();

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：

更多关于Android权限控制可参考Android权限描述大全

希望本文所述对大家Android程序设计有所帮助。