android 文件选择

可是实现点击选择文件即可到手机目录下选择文件。

代码下载路径：http://download.csdn.net/detail/u011324501/9529924

代码实现：MainActivity.java

package com.debby;import android.app.Activity;import android.content.Intent;import android.os.Bundle;import android.view.View;import android.view.View.OnClickListener;import android.widget.Button;import android.widget.TextView;import android.widget.Toast;public class MainAcivity extends Activity{public static final int FILE_RESULT_CODE = 1;private TextView textView;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.main);Button button = (Button)findViewById(R.id.button);textView = (TextView)findViewById(R.id.fileText);button.setOnClickListener(new OnClickListener() {public void onClick(View v) {Intent intent = new Intent(MainAcivity.this,MyFileManager.class);startActivityForResult(intent, FILE_RESULT_CODE);}});}@Overrideprotected void onActivityResult(int requestCode, int resultCode, Intent data) {if(FILE_RESULT_CODE == requestCode){Bundle bundle = null;if(data!=null&&(bundle=data.getExtras())!=null){textView.setText("选择文件夹为："+bundle.getString("file"));}}}}

2、MyFileManager.java

package com.debby;import java.io.File;import java.util.ArrayList;import java.util.List;import android.app.ListActivity;import android.content.Intent;import android.net.Uri;import android.os.Bundle;import android.util.Log;import android.view.View;import android.view.View.OnClickListener;import android.view.Window;import android.widget.Button;import android.widget.ListView;import android.widget.TextView;public class MyFileManager extends ListActivity {private List<String> items = null;private List<String> paths = null;private String rootPath = "/";private String curPath = "/";private TextView mPath;private final static String TAG = "MyFileManager";@Overrideprotected void onCreate(Bundle icicle) {super.onCreate(icicle);requestWindowFeature(Window.FEATURE_NO_TITLE);setContentView(R.layout.fileselect);mPath = (TextView) findViewById(R.id.mPath);Button buttonConfirm = (Button) findViewById(R.id.buttonConfirm);buttonConfirm.setOnClickListener(new OnClickListener() {public void onClick(View v) {Intent data = new Intent(MyFileManager.this, MainAcivity.class);Bundle bundle = new Bundle();bundle.putString("file", curPath);data.putExtras(bundle);setResult(2, data);finish();}});Button buttonCancle = (Button) findViewById(R.id.buttonCancle);buttonCancle.setOnClickListener(new OnClickListener() {public void onClick(View v) {finish();}});getFileDir(rootPath);}private void getFileDir(String filePath) {mPath.setText(filePath);items = new ArrayList<String>();paths = new ArrayList<String>();File f = new File(filePath);File[] files = f.listFiles();if (!filePath.equals(rootPath)) {items.add("b1");paths.add(rootPath);items.add("b2");paths.add(f.getParent());}for (int i = 0; i < files.length; i++) {File file = files[i];items.add(file.getName());paths.add(file.getPath());}setListAdapter(new MyAdapter(this, items, paths));}@Overrideprotected void onListItemClick(ListView l, View v, int position, long id) {File file = new File(paths.get(position));if (file.isDirectory()) {curPath = paths.get(position);getFileDir(paths.get(position));} else {openFile(file);}}private void openFile(File f) {Intent intent = new Intent();intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);intent.setAction(android.content.Intent.ACTION_VIEW);String type = getMIMEType(f);intent.setDataAndType(Uri.fromFile(f), type);startActivity(intent);}private String getMIMEType(File f) {String type = "";String fName = f.getName();String end = fName.substring(fName.lastIndexOf(".") + 1, fName.length()).toLowerCase();if (end.equals("m4a") || end.equals("mp3") || end.equals("mid")|| end.equals("xmf") || end.equals("ogg") || end.equals("wav")) {type = "audio";} else if (end.equals("3gp") || end.equals("mp4")) {type = "video";} else if (end.equals("jpg") || end.equals("gif") || end.equals("png")|| end.equals("jpeg") || end.equals("bmp")) {type = "image";} else {type = "*";}type += "/*";Log.d(TAG, "type:"+type);return type;}}

3、MyAdapter.java

package com.debby;import java.io.File;import java.util.List;import com.debby.R;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.ImageView;import android.widget.TextView;public class MyAdapter 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;  public MyAdapter(Context context,List<String> it,List<String> pa)  {    mInflater = LayoutInflater.from(context);    items = it;    paths = pa;    mIcon1 = BitmapFactory.decodeResource(context.getResources(),R.drawable.back01);    mIcon2 = BitmapFactory.decodeResource(context.getResources(),R.drawable.back02);    mIcon3 = BitmapFactory.decodeResource(context.getResources(),R.drawable.folder);    mIcon4 = BitmapFactory.decodeResource(context.getResources(),R.drawable.doc);  }    public int getCount()  {    return items.size();  }  public Object getItem(int position)  {    return items.get(position);  }    public long getItemId(int position)  {    return position;  }    public View getView(int position,View convertView,ViewGroup parent)  {    ViewHolder holder;        if(convertView == null)    {      convertView = mInflater.inflate(R.layout.file_row, null);      holder = new ViewHolder();      holder.text = (TextView) convertView.findViewById(R.id.text);      holder.icon = (ImageView) convertView.findViewById(R.id.icon);            convertView.setTag(holder);    }    else    {      holder = (ViewHolder) convertView.getTag();    }    File f=new File(paths.get(position).toString());    if(items.get(position).toString().equals("b1"))    {      holder.text.setText("返回根目录..");      holder.icon.setImageBitmap(mIcon1);    }    else if(items.get(position).toString().equals("b2"))    {      holder.text.setText("返回上一层..");      holder.icon.setImageBitmap(mIcon2);    }    else    {      holder.text.setText(f.getName());      if(f.isDirectory())      {        holder.icon.setImageBitmap(mIcon3);      }      else      {        holder.icon.setImageBitmap(mIcon4);      }    }    return convertView;  }  private class ViewHolder  {    TextView text;    ImageView icon;  }}

布局代码：main.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"><Button         android:id="@+id/button"      android:layout_width="fill_parent"        android:layout_height="wrap_content"        android:text="选择文件"      /><TextViewandroid:id="@+id/fileText"android:gravity="center"android:textSize="20px"  android:textColor="#219ac6"android:layout_width="fill_parent"        android:layout_height="fill_parent"     /></LinearLayout>

fileselect.xml

<?xml version="1.0" encoding="utf-8"?><LinearLayout   xmlns:android="http://schemas.android.com/apk/res/android"  android:layout_width="250px"  android:layout_height="400px"  android:orientation="vertical"  android:background="@drawable/white">  <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"  >  </TextView>  <ListView     android:id="@android:id/list"    android:layout_width="fill_parent"    android:layout_height="330px"  >  </ListView>  <LinearLayout   android:gravity="center"    android:layout_width="wrap_content"android:layout_height="wrap_content"android:orientation="horizontal"android:background="@drawable/white"><Button         android:id="@+id/buttonConfirm"      android:layout_width="125px"        android:layout_height="fill_parent"        android:text="确定"      />    <Button         android:id="@+id/buttonCancle"      android:layout_width="125px"        android:layout_height="fill_parent"        android:text="取消"      />  </LinearLayout></LinearLayout>

file_row.xml

<?xml version="1.0" encoding="utf-8"?><LinearLayout  xmlns:android="http://schemas.android.com/apk/res/android"  android:orientation="horizontal"  android:layout_width="fill_parent"  android:layout_height="fill_parent"  android:background="#ffffff"    ><LinearLayout          android:orientation="horizontal"          android:layout_width="fill_parent"          android:layout_height="fill_parent"          android:background="@drawable/listview_selected"          android:padding="6px"      >    <ImageView android:id="@+id/icon"    android:layout_width="30dip"    android:layout_height="30dip"  >  </ImageView>  <TextView android:id="@+id/text"    android:layout_gravity="center_horizontal"    android:layout_width="fill_parent"    android:layout_height="wrap_content"     android:textColor="@drawable/black"  >  </TextView>  </LinearLayout></LinearLayout>

详细可看代码：http://download.csdn.net/detail/u011324501/9529924

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