Android中调用系统的文件浏览器及自制简单的文件浏览器

调用系统自带的文件浏览器
这很简单：

/** 调用文件选择软件来选择文件 **/
private void showFileChooser() {
  intent = new Intent(Intent.ACTION_GET_CONTENT);
  intent.setType("*/*");
  intent.addCategory(Intent.CATEGORY_OPENABLE);
  try {
    startActivityForResult(Intent.createChooser(intent, "请选择一个要上传的文件"),
        FILE_SELECT_CODE);
  } catch (android.content.ActivityNotFoundException ex) {
    // Potentially direct the user to the Market with a Dialog
    Toast.makeText(getActivity(), "请安装文件管理器", Toast.LENGTH_SHORT)
        .show();
  }
}

在catch，我们可以做更多的操作，比如会跳转到一个下载文件管理器的页面或者等等。

对于返回的数据怎么处理呢。我项目中的上传是如下接收：

/** 根据返回选择的文件，来进行上传操作 **/
  @Override
  public void onActivityResult(int requestCode, int resultCode, Intent data) {
    // TODO Auto-generated method stub
    if (resultCode == Activity.RESULT_OK) {
      // Get the Uri of the selected file
      Uri uri = data.getData();
      String url;
      try {
        url = FFileUtils.getPath(getActivity(), uri);
        Log.i("ht", "url" + url);
        String fileName = url.substring(url.lastIndexOf("/") + 1);
        intent = new Intent(getActivity(), UploadServices.class);
        intent.putExtra("fileName", fileName);
        intent.putExtra("url", url);
        intent.putExtra("type ", "");
        intent.putExtra("fuid", "");
        intent.putExtra("type", ""); 

        getActivity().startService(intent); 

      } catch (URISyntaxException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
      }
    }
    super.onActivityResult(requestCode, resultCode, data);
  }

自制文件浏览器：
这里只加一些简单的图形：

来看代码：

<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="wrap_content"
  android:orientation="vertical"
  android:layout_gravity="center_horizontal"
  tools:context=".MainActivity" > 

  <TextView
    android:id="@+id/txt1"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content" />
  <ImageButton
    android:id="@+id/imageBt1"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:src="@drawable/home"/> 

  <ListView
    android:id="@+id/listFile"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content" >
  </ListView> 

</LinearLayout>

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
  android:layout_width="match_parent"
  android:layout_height="match_parent"
  android:orientation="horizontal" > 

  <ImageView
    android:id="@+id/images"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content" /> 

  <TextView
    android:id="@+id/txtview"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content" /> 

</LinearLayout>

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<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.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;
  } 

}