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Layout（activity_documents_browser.xml）源碼：
<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="match_parent"
android:layout_gravity="center_horizontal"
android:background="#000000"
android:orientation="vertical"
tools:context="com.tonfun.smapp.DocumentsBrowserActivity" >
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="32dp" >
<ImageView
android:id="@+id/imageBt1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:focusable="false"
android:padding="3dp"
android:src="@drawable/img_back" />
<TextView
android:id="@+id/txt1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:focusable="false"
android:padding="3dp"
android:textColor="#fff" />
</LinearLayout>
<View
android:layout_width="fill_parent"
android:layout_height="3dp"
android:background="#218fff" />
<ListView
android:id="@+id/listFile"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:descendantFocusability="blocksDescendants" >
</ListView>
</LinearLayout>
Layout（activity_folder.xml）源碼
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="vertical" >
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="30dp" >
<ImageView
android:id="@+id/imageBt1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:focusable="false"
android:padding="2dp"
android:src="@drawable/img_home" />
<TextView
android:id="@+id/txt1"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:focusable="false"
android:padding="2dp"
android:textColor="#fff" />
</LinearLayout>
<View
android:layout_width="fill_parent"
android:layout_height="1dp"
android:background="#fff" />
</LinearLayout>
后臺（JAVA）代碼：
package com.tonfun.smapp;
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.provider.MediaStore.Images;
import android.view.Menu;
import android.view.MenuItem;
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;
import android.widget.Toast;
public class DocumentsBrowserActivity extends Activity {
private ListView listfile;
// 當前文件目錄
private String currentpath;
private TextView txt1;
private ImageView images;
private TextView textview;
private ImageView imagebt1;
private File fBeforePath;
private int[] img = { R.drawable.img_files, R.drawable.img_folder,
R.drawable.img_home };
private File[] files;
private SimpleAdapter simple;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_documents_browser);
listfile = (ListView) findViewById(R.id.listFile);
txt1 = (TextView) findViewById(R.id.txt1);
imagebt1 = (ImageView) findViewById(R.id.imageBt1);
init(Environment.getExternalStorageDirectory());
fBeforePath = Environment.getExternalStorageDirectory().getParentFile();
listfile.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> arg0, View arg1, int arg2,
long arg3) {
// TODO Auto-generated method stub
// 獲取單擊的文件或文件夾的名稱
String folder = ((TextView) arg1.findViewById(R.id.txt1))
.getText().toString();
try {
File filef = new File(currentpath + '/' + folder);
if (!filef.isFile()) {
init(filef);
} else {
if (filef.getName().lastIndexOf('.') >= 0) {
Toast.makeText(
DocumentsBrowserActivity.this,
"擴展名："
+ filef.getName().substring(
filef.getName()
.lastIndexOf('.'),
filef.getName().length())
+ ";絕對路徑："
+ filef.getAbsolutePath(),
Toast.LENGTH_SHORT).show();
}
}
} catch (Exception e) {
e.printStackTrace();
}
}
});
// 回根目錄
imagebt1.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// init(Environment.getExternalStorageDirectory());
if (!fBeforePath.getAbsolutePath().equals("/")) {
init(fBeforePath);
} else {
Toast.makeText(DocumentsBrowserActivity.this, "提示：已為頂級目錄！",
Toast.LENGTH_SHORT).show();
}
}
});
}
// 界面初始化
public void init(File f) {
if (Environment.getExternalStorageState().equals(
Environment.MEDIA_MOUNTED)) {
// 獲取SDcard目錄下所有文件名
fBeforePath = f.getParentFile();
files = f.listFiles();
if (!files.equals(null)) {
currentpath = f.getPath();
try {
txt1.setText("當前目錄為:" + f.getPath());
} catch (Exception ex) {
}
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.activity_folder, new String[] { "image",
"filenames" }, new int[] { R.id.imageBt1,
R.id.txt1 });
listfile.setAdapter(simple);
}
} else {
System.out.println("該文件為空");
}
}
}

復制代碼

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