Android開發的文件瀏覽器

openkk 12年前發布 | 36K 次閱讀 Android Android開發移動開發
源碼下載地址：
http://download.csdn.net/detail/nuptboyzhb/4485545
該文件瀏覽器極易擴展，文件瀏覽器實現的功能是：主UI顯示用戶選擇的文件的路徑。
完成這一功能的主要是FXExplore.java文件。如下圖解析：
Android開發的文件瀏覽器
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：鄭海波 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 自定義動態廣播接收器，內部類,接收選擇的路徑
private BroadcastReceiver dynamicReceiver = new BroadcastReceiver() {

    @Override
    public void onReceive(Context context, Intent intent) {
        Log.e("MainActivity", "接收自定義動態注冊廣播消息");
        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;
}

}</pre>


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：鄭海波 http://blog.csdn.net/nuptboyzhb
參考：Google Android開發入門與實戰/
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("文件瀏覽器");
        itemlist = (ListView) findViewById(R.id.itemlist);
        refreshListItems(path);
    }
    /根據path更新路徑列表/
    private void refreshListItems(String path) {
        setTitle("文件瀏覽器 > "+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);
    }
    /根據路徑生成一個包含路徑的列表/
    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;
    }
    /跳轉到上一層/
    private void goToParent() {
        File file = new File(path);
        File str_pa = file.getParentFile();
        if(str_pa == null){
            Toast.makeText(FSExplorer.this,
                    "已經是根目錄",
                    Toast.LENGTH_SHORT).show();
            refreshListItems(path); 
        }else{
            path = str_pa.getAbsolutePath();
            refreshListItems(path); 
        }
    }
    /實現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();
            }

    }

}


}</pre>




Files.xml文件

 

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="

<ListView 
    android:layout_width="fill_parent"
    android:layout_height="fill_parent" 
    android:id="@+id/itemlist" />

</LinearLayout></pre>


File_row.xml文件


<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
    xmlns:android="

<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></pre>




AndroidManifest.xml文件

 

<manifest xmlns:android="

<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></pre>轉自：http://blog.csdn.net/nuptboyzhb/article/details/7844893
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Android Android開發移動開發
Android開發的文件瀏覽器

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