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() {@Overridepublic void onClick(View v) {// TODO Auto-generated method stubIntent 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);}@Overridepublic 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*/@Overridepublic 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>