Android开发之文件浏览器
源码下载地址：
http://download.csdn.net/detail/nuptboyzhb/4485545
该文件浏览器极易扩展，文件浏览器实现的功能是：主UI显示用户选择的文件的路径。
完成这一功能的主要是FXExplore.java文件。如下图解析：
主SelectFilesActivity.java文件
package com.example.com.njupt.zhb.selectfiles;
import android.os.Bundle;
import android.app.Activity;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.util.Log;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.TextView;
import android.widget.Toast;
/*
@作者：郑海波 http://blog.csdn.net/nuptboyzhb
*/
public class SelectFilesActivity extends Activity {
private Button selectBtn;
private TextView pathView;
private static final String DYNAMICACTION = "njupt.zhb.sendpath";
private OnClickListener listener=null;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_select_files);
listener=new OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
Intent intent=new Intent(SelectFilesActivity.this,FSExplorer.class);
startActivity(intent);
}
};
selectBtn=(Button)findViewById(R.id.selectFilesBtn);
pathView=(TextView)findViewById(R.id.filepath);
selectBtn.setOnClickListener(listener);
IntentFilter filter_dynamic = new IntentFilter();
filter_dynamic.addAction(DYNAMICACTION);
registerReceiver(dynamicReceiver, filter_dynamic);
}
// 2 自定义动态广播接收器，内部类,接收选择的路径
private BroadcastReceiver dynamicReceiver = new BroadcastReceiver() {
@Override
public void onReceive(Context context, Intent intent) {
Log.e("MainActivity", "接收自定义动态注册广播消息");
if(intent.getAction().equals(DYNAMICACTION)){
String path = intent.getStringExtra("path");
Toast.makeText(context, path, Toast.LENGTH_SHORT).show();
String text="Path:"+path;
pathView.setText(text);
}
}
};
@Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.activity_select_files, menu);
return true;
}
}
FXExplore.java文件
package com.example.com.njupt.zhb.selectfiles;
import java.io.File;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import android.R.string;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.util.Log;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ListView;
import android.widget.SimpleAdapter;
import android.widget.Toast;
import android.widget.AdapterView.OnItemClickListener;
/*
@作者：郑海波 http://blog.csdn.net/nuptboyzhb
参考：Google Android开发入门与实战
*/
public class FSExplorer extends Activity implements OnItemClickListener {
private static final String TAG = "FSExplorer";
private static final int IM_PARENT = Menu.FIRST + 1;
private static final int IM_BACK = IM_PARENT + 1;
private static final String DYNAMICACTION = "njupt.zhb.sendpath";
ListView itemlist = null;
String path = "/";
List<Map<String, Object>> list;
public void sendPathToActivity(String path){
Intent intent = new Intent();
intent.setAction(DYNAMICACTION);
intent.putExtra("path", path);
sendBroadcast(intent);
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.files);
setTitle("文件浏览器");
itemlist = (ListView) findViewById(R.id.itemlist);
refreshListItems(path);
}
/*根据path更新路径列表*/
private void refreshListItems(String path) {
setTitle("文件浏览器 > "+path);
list = buildListForSimpleAdapter(path);
SimpleAdapter notes = new SimpleAdapter(this, list, R.layout.file_row,
new String[] { "name", "path" ,"img"}, new int[] { R.id.name,
R.id.desc ,R.id.img});
itemlist.setAdapter(notes);
itemlist.setOnItemClickListener(this);
itemlist.setSelection(0);
}
/*根据路径生成一个包含路径的列表*/
private List<Map<String, Object>> buildListForSimpleAdapter(String path) {
File[] files = new File(path).listFiles();
List<Map<String, Object>> list = new ArrayList<Map<String, Object>>(files.length);
Map<String, Object> root = new HashMap<String, Object>();
root.put("name", "/");
root.put("img", R.drawable.file_root);
root.put("path", "go to root directory");
list.add(root);
Map<String, Object> pmap = new HashMap<String, Object>();
pmap.put("name", "..");
pmap.put("img", R.drawable.file_paranet);
pmap.put("path", "go to paranet Directory");
list.add(pmap);
for (File file : files){
Map<String, Object> map = new HashMap<String, Object>();
if(file.isDirectory()){
map.put("img", R.drawable.directory);
}else{
map.put("img", R.drawable.file_doc);
}
map.put("name", file.getName());
map.put("path", file.getPath());
list.add(map);
}
return list;
}
/*跳转到上一层*/
private void goToParent() {
File file = new File(path);
File str_pa = file.getParentFile();
if(str_pa == null){
Toast.makeText(FSExplorer.this,
"已经是根目录",
Toast.LENGTH_SHORT).show();
refreshListItems(path);
}else{
path = str_pa.getAbsolutePath();
refreshListItems(path);
}
}
/*实现OnItemClickListener接口*/
@Override
public void onItemClick(AdapterView<?> parent, View v, int position, long id) {
Log.i(TAG, "item clicked! [" + position + "]");
if (position == 0) {
path = "/";
refreshListItems(path);
}else if(position == 1){
goToParent();
} else {
path = (String) list.get(position).get("path");
File file = new File(path);
if (file.isDirectory())
refreshListItems(path);
else
{
Toast.makeText(FSExplorer.this,path,Toast.LENGTH_SHORT).show();
sendPathToActivity(path);
finish();
}
}
}
}
Files.xml文件
<?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"> <ListView android:layout_width="fill_parent" android:layout_height="fill_parent" android:id="@+id/itemlist" /> </LinearLayout>
File_row.xml文件
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/vw1"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:padding="4px"
android:orientation="horizontal">
<ImageView android:id="@+id/img"
android:layout_width="32px"
android:layout_margin="4px"
android:layout_height="32px"/>
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="vertical">
<TextView android:id="@+id/name"
android:textSize="18sp"
android:textStyle="bold"
android:layout_width="fill_parent"
android:layout_height="wrap_content"/>
<TextView android:id="@+id/desc"
android:textSize="14sp"
android:layout_width="fill_parent"
android:paddingLeft="10px"
android:layout_height="wrap_content"/>
</LinearLayout>
</LinearLayout>
AndroidManifest.xml文件
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.com.njupt.zhb.selectfiles"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="4"
android:targetSdkVersion="15" />
<application
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<activity
android:name=".SelectFilesActivity"
android:label="@string/title_activity_select_files" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity android:name=".FSExplorer"> </activity>
</application>
</manifest>