Android文件目录选择器(可自行扩展)

上一篇中写了文件下载的博文，其中说道要用户选择文件的保存目录，在此展示：

首先看FileBrowserActivity.java

package com.knowhow.android.client;import java.io.File;import java.util.ArrayList;import java.util.List;import android.app.AlertDialog;import android.content.DialogInterface;import android.content.Intent;import android.graphics.Color;import android.os.Bundle;import android.view.View;import android.view.View.OnClickListener;import android.widget.AdapterView;import android.widget.AdapterView.OnItemClickListener;import android.widget.Button;import android.widget.ImageView;import android.widget.LinearLayout;import android.widget.ListView;import android.widget.TextView;import android.widget.Toast;import com.knowhow.android.client.ui.adapter.FileAdapter;public class FileBrowserActivity extends KHActivity {private List<String> items=null;private List<String> paths=null;private String rootPath="/sdcard/";private TextView mPath;private ListView list;  private FileAdapter m_FileAdapter;private void getFileDir(String filePath){File f=new File(filePath); if(f.exists() && f.canWrite()){mPath.setText(filePath);items=new ArrayList<String>();paths=new ArrayList<String>();File[] files=f.listFiles();if(!filePath.equals(rootPath)){items.add("goroot");paths.add(rootPath);items.add("goparent");paths.add(f.getParent());}for(int i=0;i<files.length;i++){File file=files[i];if(file.isDirectory()){items.add(file.getName());paths.add(file.getPath());}}m_FileAdapter = new FileAdapter(this,items,paths);list.setAdapter(m_FileAdapter);list.setOnItemClickListener(new OnItemClickListener(){@Overridepublic void onItemClick(AdapterView<?> parent, View view,int position, long id) {if(items.get(position).toString().equals("goparent")){getFileDir(paths.get(position));}else if(items.get(position).toString().equals("goroot")){getFileDir(paths.get(position));return;}else{File file=new File(paths.get(position));if(file.canWrite()){if (file.isDirectory()){getFileDir(paths.get(position));}}else{LinearLayout lay = new LinearLayout(FileBrowserActivity.this);lay.setOrientation(LinearLayout.HORIZONTAL);ImageView image = new ImageView(FileBrowserActivity.this);TextView text = new TextView(FileBrowserActivity.this);text.setTextColor(Color.RED);text.setTextSize(20);text.setText("很抱歉您的权限不足!");Toast toast = Toast.makeText(FileBrowserActivity.this, text.getText().toString(), Toast.LENGTH_LONG);image.setImageResource(android.R.drawable.stat_sys_warning);lay.addView(image);lay.addView(text);toast.setView(lay);toast.show();}}}});}else{LinearLayout lay = new LinearLayout(FileBrowserActivity.this);lay.setOrientation(LinearLayout.HORIZONTAL);ImageView image = new ImageView(FileBrowserActivity.this);TextView text = new TextView(FileBrowserActivity.this);text.setTextColor(Color.RED);text.setTextSize(20);text.setText("无SD卡,无法完成下载!");Toast toast = Toast.makeText(FileBrowserActivity.this, text.getText().toString(), Toast.LENGTH_LONG);image.setImageResource(android.R.drawable.stat_sys_warning);lay.addView(image);lay.addView(text);toast.setView(lay);toast.show();this.finish();}}@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);this.setContentView(R.layout.filelist);mPath = (TextView)this.findViewById(R.id.mPath);list = (ListView)this.findViewById(R.id.filelist);getFileDir(rootPath);mPath.setTextColor(this.getResources().getColor(R.color.text_color));this.setTitle("请选择保存目录:");Button ok = (Button)this.findViewById(R.id.fileok);ok.setPadding(0, 5, 0, 5);ok.setOnClickListener(new OnClickListener(){@Overridepublic void onClick(View v) {/*if(mPath.getText().toString().equals(rootPath)){LinearLayout lay = new LinearLayout(FileBrowserActivity.this);lay.setOrientation(LinearLayout.HORIZONTAL);ImageView image = new ImageView(FileBrowserActivity.this);TextView text = new TextView(FileBrowserActivity.this);text.setTextColor(FileBrowserActivity.this.getResources().getColor(R.color.text_color));text.setTextSize(16);text.setText("很抱歉您的权限不足!");Toast toast = Toast.makeText(FileBrowserActivity.this, text.getText().toString(), Toast.LENGTH_SHORT);image.setImageResource(android.R.drawable.stat_sys_warning);lay.addView(image);lay.addView(text);toast.setView(lay);toast.show();}else{*/Intent i = new Intent();Bundle b = new Bundle();  b.putString("savePath", mPath.getText().toString());  b.putString("url", FileBrowserActivity.this.getIntent().getStringExtra("url"));  b.putString("fileName", FileBrowserActivity.this.getIntent().getStringExtra("fileName"));  i.putExtras(b);FileBrowserActivity.this.setResult(RESULT_OK, i);FileBrowserActivity.this.finish();//}}});Button cancel = (Button)this.findViewById(R.id.filecancel);cancel.setPadding(0, 5, 0, 5);cancel.setOnClickListener(new OnClickListener(){@Overridepublic void onClick(View v) {FileBrowserActivity.this.finish();}});}}

接下来看listview的layout文件以及FileAdapter.java

filelist.xml

<?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="fill_parent"android:orientation="vertical" android:background="@drawable/white"><LinearLayout android:layout_width="fill_parent" android:gravity="center"android:layout_height="wrap_content" android:orientation="horizontal"><Button android:layout_weight="1.0" android:textColor="@color/button_text_color"android:textSize="16dip" android:background="@drawable/bg_alibuybutton_states"android:layout_height="wrap_content" android:layout_width="wrap_content"android:id="@+id/fileok"android:text="确定" /><Button android:layout_marginLeft="10dip"android:layout_weight="1.0" android:textColor="@color/button_text_color"android:textSize="16dip" android:background="@drawable/bg_alibuybutton_states"android:layout_height="wrap_content" android:layout_width="wrap_content"android:id="@+id/filecancel" android:text="取消"></Button></LinearLayout><TextView android:id="@+id/mPath" android:layout_width="wrap_content"android:layout_height="wrap_content" android:padding="5px"android:textSize="18sp" android:textColor="@drawable/blue" /><ListView android:id="@+id/filelist" android:layout_width="wrap_content"    android:cacheColorHint="#00000000"android:layout_height="wrap_content" /></LinearLayout>

file_row.xml

<?xml version="1.0" encoding="utf-8"?><RelativeLayout android:id="@+id/file_items"android:layout_width="fill_parent" xmlns:android="http://schemas.android.com/apk/res/android"android:layout_height="wrap_content" android:paddingBottom="4dip"android:paddingLeft="12dip" android:paddingRight="12dip">  <ImageView android:id="@+id/fileicon"    android:layout_height="wrap_content"android:textSize="26dip"android:layout_alignParentLeft="true"android:layout_width="wrap_content"android:layout_below="@+id/file_items"/>  <TextView android:id="@+id/filetext"    android:layout_gravity="center_vertical"    android:layout_width="fill_parent"    android:layout_toRightOf="@id/fileicon"    android:paddingLeft="20dip"    android:layout_height="wrap_content"/>  <CheckBox android:id="@+id/file_check"     style="?android:attr/starStyle"android:layout_height="wrap_content" android:layout_width="wrap_content" android:layout_alignParentRight="true"android:focusable="false"           android:focusableInTouchMode="false"           android:clickable="false"android:layout_below="@+id/file_items"/></RelativeLayout>

FileAdapter.java

package com.knowhow.android.client.ui.adapter;import java.io.File;import java.util.ArrayList;import java.util.HashMap;import java.util.List;import java.util.Map;import android.content.Context;import android.graphics.Bitmap;import android.graphics.BitmapFactory;import android.view.LayoutInflater;import android.view.View;import android.view.ViewGroup;import android.widget.BaseAdapter;import android.widget.CheckBox;import android.widget.ImageView;import android.widget.TextView;import com.knowhow.android.client.R;public class FileAdapter extends BaseAdapter{private LayoutInflater mInflater;private Bitmap mIcon1;private Bitmap mIcon2;private Bitmap mIcon3;private Bitmap mIcon4;private List<String> items;private List<String> paths;private Map<Integer, Boolean> isSelected;private Map<Integer, Integer> isVisibility;public Map<Integer, Integer> getIsVisibility() {return isVisibility;}private List<ViewHolder> VHs = new ArrayList<ViewHolder>();private Context context;public Map<Integer, Boolean> getIsSelected() {return isSelected;}public void setIsSelected(Map<Integer, Boolean> isSelected) {this.isSelected = isSelected;}public FileAdapter(Context context,List<String> it,List<String> pa){this.context = context;mInflater = LayoutInflater.from(context);if( it != null && it.size() > 0){isSelected = new HashMap<Integer, Boolean>();isVisibility = new HashMap<Integer, Integer>();for (int i = 0; i < it.size(); i++) {    isSelected.put(i, false);isVisibility.put(i, View.GONE);}}items = it;paths = pa;mIcon1 = BitmapFactory.decodeResource(context.getResources(),R.drawable.backroot);mIcon2 = BitmapFactory.decodeResource(context.getResources(),R.drawable.backparent);mIcon3 = BitmapFactory.decodeResource(context.getResources(),R.drawable.folder);mIcon4 = BitmapFactory.decodeResource(context.getResources(),R.drawable.doc);}@Overridepublic int getCount(){return items.size();}@Overridepublic Object getItem(int position){return items.get(position);}@Overridepublic long getItemId(int position){return position;}@Overridepublic View getView(int position,View convertView,ViewGroup parent){ViewHolder holder;if(convertView == null){convertView = mInflater.inflate(R.layout.file_row, null);holder = new ViewHolder();VHs.add(holder);holder.text = (TextView) convertView.findViewById(R.id.filetext);holder.text.setTextColor(context.getResources().getColor(R.color.text_color));holder.icon = (ImageView) convertView.findViewById(R.id.fileicon);holder.cBox = (CheckBox) convertView.findViewById(R.id.file_check);convertView.setTag(holder);}else{holder = (ViewHolder) convertView.getTag();}File f=new File(paths.get(position).toString());if(items.get(position).toString().equals("goroot")){holder.text.setText("返回根目录");holder.icon.setImageBitmap(mIcon1);holder.cBox.setChecked(isSelected.get(position));holder.cBox.setVisibility(isVisibility.get(position));}else if(items.get(position).toString().equals("goparent")){holder.text.setText("返回上一级");holder.icon.setImageBitmap(mIcon2);holder.cBox.setChecked(isSelected.get(position));holder.cBox.setVisibility(isVisibility.get(position));}else{holder.text.setText(f.getName());if(f.isDirectory()){holder.icon.setImageBitmap(mIcon3);holder.cBox.setChecked(isSelected.get(position));holder.cBox.setVisibility(isVisibility.get(position));}else{holder.icon.setImageBitmap(mIcon4);holder.cBox.setChecked(isSelected.get(position));holder.cBox.setVisibility(isVisibility.get(position));}}return convertView;}public List<ViewHolder> getVHs() {return VHs;}public final class ViewHolder{public TextView text;public ImageView icon;public CheckBox cBox;}}

以上就是所有代码，文件夹以及文件的图片可以自己找，因为我不能上传图片所以，这2个文件以及效果图我会后续补上。(几天之后)

亲们可以根据自己的需要扩展文件选择(多选或者单选都可以)如果需要我帮忙别客气。

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