Android enables multiple selection of picture ListView instances for bulk operations _android

This article is an example of the Android implementation for easy bulk operation of the more optional picture listview. Share to everyone for your reference, specific as follows:

Before the project needs to implement a selectable list of pictures, users select one or more pictures, batch upload. But there is more than the choice of ordinary list of code, there is a simple picture list of code, but there is no combination of the two code, had to implement one.

Nonsense not to say, directly on the code.

First two layout:

1, Main.xml

<?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"
    Fill_parent "
    android:focusable=" false "
    android:id=" @+id/lvimagelist ">
  </ListView>
</LinearLayout>

2, Listitem.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="? android:attr
    /listpreferreditemheight "> <imageview android:id=" @+id/itemimgimageinfo "android:layout_margintop=" 4dip " Android:layout_marginbottom= "4dip" android:layout_width= "Android:attr/listpreferreditemheight" Android:layout_ height= "? android:attr/listpreferreditemheight" > </ImageView> <twolinelistitem xmlns:android= "http:// Schemas.android.com/apk/res/android "android:layout_width=" fill_parent "android:layout_height=" Fill_parent "an
      droid:paddingleft= "4dip" android:mode= "Twoline" > <checkedtextview android:id= "@+id/itemchkimageinfo" 
      Android:layout_width= "Fill_parent" android:layout_height= "wrap_content" android:gravity= "center_vertical" Android:textappearance= "? Android:atTr/textappearancesmall "android:checkmark=" "Android:attr/listchoiceindicatormultiple" > &LT;/CHECKEDTEXTVIEW&G
    T <textview android:id= "@+id/itemtxtimageinfo" android:layout_width= "Fill_parent" android:layout_height = "Wrap_content" android:gravity= "Center_vertical|top" android:layout_marginbottom= "4dip" Android:layout_
  below= "@+id/itemchkimageinfo" android:textappearance= "Android:attr/textappearancesmall" > </TextView>

 </TwoLineListItem> </LinearLayout>

Followed by code:

Package com.android.MultipleChoiceImageList;
Import java.util.ArrayList;
Import Java.util.HashMap;
Import java.util.List;
Import Java.util.Map;
Import android.app.Activity;
Import Android.content.Context;
Import Android.database.Cursor;
Import Android.graphics.Bitmap;
Import Android.net.Uri;
Import Android.os.Bundle;
Import Android.provider.MediaStore;
Import Android.provider.MediaStore.Images;
Import Android.view.LayoutInflater;
Import Android.view.View;
Import Android.view.ViewGroup;
Import Android.widget.AdapterView;
Import Android.widget.CheckedTextView;
Import Android.widget.ImageView;
Import Android.widget.ListView;
Import Android.widget.SimpleAdapter;
Import Android.widget.TextView;
Import Android.widget.AdapterView.OnItemClickListener;
  public class Mainactivity extends activity {private ListView lvimagelist;
  Private String imageid= "imageID";
  Private String imagename = "imagename";
  Private String Imageinfo = "Imageinfo"; Private arraylist<string> FileNames = nEW arraylist<string> ();
  Private Multiplechoiceimagelistadapter Madapter; /** called the activity is a.
    * * @Override public void onCreate (Bundle savedinstancestate) {super.oncreate (savedinstancestate);
    Setcontentview (R.layout.main);
    Lvimagelist= (ListView) This.findviewbyid (r.id.lvimagelist);
    Lvimagelist.setitemscanfocus (FALSE); Lvimagelist.setonitemclicklistener (New Onitemclicklistener () {@Override public void Onitemclick (ADAPTERVIEW&L t;? > Parent, view view, int position, long id) {Checkedtextview Checkedtextview = (checkedtextview) view.findview
        Byid (R.id.itemchkimageinfo);
        Checkedtextview.toggle ();
      Madapter.setcheckitem (position, checkedtextview.ischecked ());
    }
    });
      try{string[] from = {imageID, imagename, imageinfo};
      Int[] to = {r.id.itemimgimageinfo, r.id.itemchkimageinfo, r.id.itemtxtimageinfo}; Madapter = new Multiplechoiceimagelistadapter (Mainactivity.this,GetImageList (), R.layout.listitem, from, to);
    Lvimagelist.setadapter (Madapter);
    catch (Exception ex) {return; }//Get Picture List private arraylist<map<string, string>> getimagelist () {arraylist<map<string, Stri
    ng>> imageList = new arraylist<map<string,string>> ();
    Hashmap<string, string> ImageMap;
    Read all images in SD card uri uri = MediaStore.Images.Media.EXTERNAL_CONTENT_URI; string[] projection = {mediastore.images.media._id, MediaStore.Images.Media.DISPLAY_NAME,
    MediaStore.Images.Media.DATA, MediaStore.Images.Media.SIZE};
    String selection = MediaStore.Images.Media.MIME_TYPE + "=?";
    String[] Selectionarg ={"Image/jpeg"};
    Cursor mcursor = this.managedquery (URI, projection, selection, Selectionarg, MediaStore.Images.Media.DISPLAY_NAME);
    Imagelist.clear ();
      if (mcursor!= null) {Mcursor.movetofirst (); while (Mcursor.getposition ()!= Mcursor.getcount ()) {imagemap= NewHashmap<string, string> ();
        Imagemap.put (imageID, Mcursor.getstring (Mcursor.getcolumnindex (mediastore.images.media._id)));
        Imagemap.put (ImageName, Mcursor.getstring (Mcursor.getcolumnindex (MediaStore.Images.Media.DISPLAY_NAME)));
        Imagemap.put (Imageinfo, "" + (Mcursor.getlong (Mcursor.getcolumnindex (MediaStore.Images.Media.SIZE))/1024) + "KB");
        Imagelist.add (IMAGEMAP);
        Filenames.add (Mcursor.getstring (Mcursor.getcolumnindex (MediaStore.Images.Media.DATA)));
      Mcursor.movetonext ();
    } mcursor.close ();
  return imageList; //Selectable Picture List Adapter class Multiplechoiceimagelistadapter extends Simpleadapter {private Map<integer, boolean> ma
    P
    Private list<integer> State; Private list<?
    Extends Map<string,?>> mlist;
    Layoutinflater Minflater; Public Multiplechoiceimagelistadapter, list<map<string, string>> data, int resource, String[] From, int[to) {suPer (context, data, resource, from, to);
      Map = new Hashmap<integer, boolean> ();
      Minflater = Layoutinflater.from (context);
      mlist = data;
      for (int i = 0; i < data.size (); i++) {Map.put (I, false);
    state = new arraylist<integer> ();
    @Override public int GetCount () {return mlist.size ();
    @Override public Object getitem (int position) {return position;
    @Override public long getitemid (int position) {return position;
      }//Set entry checked state public void Setcheckitem (int position, Boolean ischecked) {map.put (position, ischecked);
      if (state.contains (position)) State.remove ((Object) position);
      if (ischecked) {state.add (position);
      }//Get list of selected entries public long[] Getcheckitemids () {int count = State.size ();
      long[] ids = new Long[count];
     for (int i = 0; i < count; i++) {ids[i]= (long) state.get (i); } return IDs; @Override public View getview (int position, View Convertview, ViewGroup parent) {if (Convertview = null)
      {Convertview = minflater.inflate (R.layout.listitem, NULL);
      } Checkedtextview Checkedtextview = (checkedtextview) Convertview.findviewbyid (r.id.itemchkimageinfo);
      Checkedtextview.setchecked (Map.get (position));
      Checkedtextview.settext ((String) mlist.get (position). Get (imagename));
      TextView TextView = (TextView) Convertview.findviewbyid (r.id.itemtxtimageinfo);
      Textview.settext ((String) mlist.get (position). Get (Imageinfo));
      Show thumbnail image ImageView image = (ImageView) Convertview.findviewbyid (r.id.itemimgimageinfo); Bitmap BM = MediaStore.Images.Thumbnails.getThumbnail (Getcontentresolver (), Long.parselong ((String) Mlist.get (
      Position). Get (imageID)), Images.Thumbnails.MICRO_KIND, NULL);
      Image.setimagebitmap (BM);
    return convertview;

 }
  }
}

The following are the effects on the emulator:

As a beginner Java and Android, the code is relatively rough, please forgive me, welcome to correct, I appreciate.

For more information on Android-related content readers can view the site: "Android graphics and image processing skills summary", "Android Development introduction and Advanced Course", "Android debugging techniques and common problems solution summary", " Android Multimedia How-to Summary (audio, video, audio, etc), summary of Android Basic components usage, Android View tips Summary, Android layout layout tips and a summary of Android controls usage

I hope this article will help you with the Android program.