An analysis of the problem of Android ListView point Praise _android

I've been looking at Android for the last time, using ListView to do some of the awesome functions

Basic ideas:

Access to the interface – "Getting Data" –
Show in ListView-"
Save each row by clicking on the Map Collection (Position,boolean)-
Use entity classes to save objects-"
The Get/set method is worth changing accordingly-"
Click once, the corresponding quantity plus 1

Only achieved a point of Praise function , tread and praise basic similar.

Specifically implemented as follows:

Inherit from Baseadapter

Package Com.gz.test_listview;
Import Android.content.Context;
Import Android.content.DialogInterface;
Import android.content.Intent;
Import Android.os.Handler;
Import Android.os.Message;
Import Android.util.Log;
Import Android.view.LayoutInflater;
Import Android.view.View;
Import Android.view.ViewGroup;
Import Android.widget.AdapterView;
Import Android.widget.BaseAdapter;
Import Android.widget.Button;
Import Android.widget.ImageView;
Import Android.widget.ListView;
Import Android.widget.TextView;

Import Android.widget.Toast;
Import java.util.ArrayList;
Import Java.util.HashMap;
Import java.util.List;

Import Java.util.Map;
 /** * Created by GZ on 2016/11/9.
  * * public class Mainactivityadapter extends baseadapter{//used to get elements of the interface private Viewholder holder;
  private context; The Bean here is a test of the internal class, the point of praise and the number of steps to save, you can define a class,//direct access to data is good, need to improve the private list<bean> Praise_step_num = new arraylist<

  Bean> ();
  Private Layoutinflater Inflater; Save the current point of praise List<map<striNg,object>> ListItems; /* According to position, save the clicked which row of data, the default is False, click to True/private Map<integer, boolean> isexist = new Hashmap<integer

  , boolean> ();
    Public Mainactivityadapter (Context context,list<map<string,object>> listitems) {this.context = context;
    This.listitems = ListItems;
    Inflater = Layoutinflater.from (context);
    LOG.I ("ListItem", listitems.tostring ());
  Init (); private void Init () {/* is assigned a value for the corresponding data, all data is stored in listitems position one by one corresponds to each row of data * * for (int i = 0;i<li
      Stitems.size (); i++) {isexist.put (i,false);
      Bean B = new Bean ();
      Integer praise = Integer.parseint (Listitems.get (i). Get ("Praise"). ToString ());
      B.setpraise (Praise);
      Integer step = Integer.parseint (Listitems.get (i). Get ("step"). ToString ());
      B.setstep (step);
      Praise_step_num.add (I,B);
    LOG.I ("Praise_step", Praise_step_num.get (i). Getpraise () + ""); @Override public int GetCount () {return LIstitems.size ();
  @Override public Object getitem (int position) {return position;
  @Override public long getitemid (int position) {return position; @Override Public View getview (final int position, View Convertview, ViewGroup parent) {//Get the praise, step value final Bea

    n Bean = praise_step_num.get (position);
      if (Convertview = = null) {holder = new Viewholder ();
      Convertview = Inflater.inflate (r.layout.item_praise,null);
      Holder.img_praise = (ImageView) Convertview.findviewbyid (r.id.tv_praises_img);
      Holder.img_step = (ImageView) Convertview.findviewbyid (r.id.tv_step_img);
      Holder.praise = (TextView) Convertview.findviewbyid (r.id.tv_praises);
      Holder.step = (TextView) Convertview.findviewbyid (r.id.tv_step);


      Holder.title = (TextView) Convertview.findviewbyid (r.id.tv_name);



      Holder.img_step.setImageResource (R.drawable.bad);
    Convertview.settag (holder); }else{holder = (viewholder) convertview.geTtag ();
    } holder.praise.setText (Bean.getpraise () + "");
    Holder.step.setText (Bean.getstep () + "");
     Holder.title.setText (Listitems.get (position). Get ("title") + ""); /* Every time the Convertview, Convertview is not assigned value, will be used after the assignment of data, such as: Click on the first row of data Praise button, the corresponding first line of praise picture into red when sliding down the page, the bottom of the There will be a change in the data, reused here for each reuse assignment/if (Bean.getpraise ()!=0) {Holder.img_praise.setImageResource (r.drawable).
    Good);
    }else{Holder.img_praise.setImageResource (R.DRAWABLE.GOOD_NO);
    } if (Bean.getstep ()!=0) {Holder.img_step.setImageResource (R.drawable.bad);
    }else{Holder.img_step.setImageResource (R.DRAWABLE.BAD_NO);

    } holder.img_praise.setOnClickListener (New Imgclick (Position,bean));
  return convertview;
    Class Imgclick implements View.onclicklistener {private int position;

    Private Bean bean;
      Public Imgclick (int position,bean Bean) {this.position = position;
    This.bean = Bean; } @Override PubLIC void OnClick (final View v) {log.i ("position", position+ "");
            if (Bean.getpraise () ==0) {if isexist.get (position) = = False) {Final Handler Handler = new Handler () {
              @Override public void Handlemessage (msg) {super.handlemessage);
                  Switch (msg.what) {case 1:imageview btn = (imageview) v;
                    if (v.getid () = = Btn.getid ()) {Isexist.put (position, true);
                    Bean.setpraise (Bean.getpraise () +1);
                    Btn.setimageresource (R.drawable.good);
                    Animationtools.scale (BTN);
                    Notifydatasetchanged ();
                  Break
                  Case 2:toast.maketext (context, "failure", Toast.length_long). Show ();
              Break
          }
            }
          }; New Thread () {@Override public VOID run () {msg = new message ();
              Msg.what=1;
            Handler.sendmessage (msg);
        }}.start ();
      }else{Toast.maketext (context, "already clicked", Toast.length_long). Show ();

    }} private static class viewholder{public ImageView img_praise;
    Public ImageView Getimg_praise () {return img_praise;
    Public ImageView Getimg_step () {return img_step;
    Public TextView getpraise () {return praise;
    Public TextView Getstep () {return step;
    Public TextView GetTitle () {return title;
    Private ImageView Img_step;
    Public TextView Praise;
    Private TextView step;


  Private TextView title;
    Class bean{public int getpraise () {return praise;
    The public void setpraise (int praise) {this.praise = praise;
    public int Getstep () {return step; } public void SetStep (inT step} {this.step = step;
    } private int praise;

  private int step;

 }
}

Mainactivity

Assign a value to a ListView value, and then bind to and adapter

Package Com.gz.test_listview;
Import android.app.Activity;
Import android.content.Intent;
Import android.support.v7.app.AppCompatActivity;
Import Android.os.Bundle;
Import Android.view.View;
Import Android.widget.AdapterView;

Import Android.widget.ListView;
Import java.util.ArrayList;
Import Java.util.HashMap;
Import java.util.List;
Import Java.util.Map;

Import java.util.Objects;
  public class Mainactivity extends activity {private ListView ListView;
  Private string[] title = {"Commercial", "household", "test", "multi-Union", "Air energy", "commercial", "Home", "Test", "multi-Union", "Air energy"};
  Private string[] Praise = {"3", "1", "0", "0", "0", "3", "1", "0", "0", "0"};

  Private string[] Step = {"3", "0", "0", "0", "0", "3", "0", "0", "0", "0"};

  Private arraylist<map<string,object>> Map = new arraylist<map<string, object>> ();
  Private ListView ListView;
    @Override protected void OnCreate (Bundle savedinstancestate) {super.oncreate (savedinstancestate);
    Setcontentview (R.layout.activity_main); ListView = (ListView)Findviewbyid (R.id.listview);
      for (int i=0;i<title.length;i++) {map<string,object> item = new hashmap<string,object> ();
      Item.put ("title", Title[i]);
      Item.put ("Praise", Praise[i]);
      Item.put ("Step", Step[i]);
    Map.add (item);

    } mainactivityadapter adapter = new Mainactivityadapter (THIS,MAP);
    Listview.setadapter (adapter); Listview.setonitemclicklistener (New Adapterview.onitemclicklistener () {@Override public void Onitemclick (ADAP Terview<?> Parent, view view, int position, long id) {Intent Intent = new Intent (Mainactivity.this,detailac
        Tivity.class);
      StartActivity (Intent);

  }
    });

 }
}

Jump Interface , test with

Package Com.gz.test_listview;

Import android.app.Activity;
Import Android.os.Bundle;
Import Android.widget.ListView;

Import java.util.ArrayList;
Import Java.util.HashMap;
Import Java.util.Map;

public class Detailactivity extends activity {


  @Override
  protected void onCreate (Bundle savedinstancestate) { C11/>super.oncreate (savedinstancestate);
    Setcontentview (R.layout.detail_info);
  }

The realization of simple animation effect

Just use it right now.

Package Com.gz.test_listview;

Import Android.view.View;
Import android.view.animation.Animation;
Import android.view.animation.ScaleAnimation;

public class Animationtools {public
  static void scale (View v) {
    scaleanimation anim = new Scaleanimation (1.0f, 1. 5f, 1.0f, 1.5f,
        animation.relative_to_self, 0.5f, animation.relative_to_self,
        0.5f);
    Anim.setduration ();
    V.startanimation (ANIM);

  }

Interface

<?xml version= "1.0" encoding= "Utf-8"?> <relativelayout xmlns:android=
  "http://" Schemas.android.com/apk/res/android "
  xmlns:tools=" Http://schemas.android.com/tools "
  android:layout_ Width= "Match_parent"
  android:layout_height= "match_parent"
  android:paddingleft= "@dimen/activity_ Horizontal_margin "
  android:paddingright=" @dimen/activity_horizontal_margin "
  android:paddingtop=" @dimen /activity_vertical_margin "
  android:paddingbottom=" @dimen/activity_vertical_margin "
  tools:context=" Com.gz.test_listview. Mainactivity ">

  <listview
    android:id=" @+id/listview "android:layout_width=" Match_parent "
    android:layout_height= "Wrap_content" >


  </ListView>
</RelativeLayout>

ListView Child Items

<?xml version= "1.0" encoding= "Utf-8"?> <linearlayout xmlns:android= "http://schemas.android.com/apk/res/" Android "android:id=" @+id/lyt_root "android:layout_width=" match_parent "android:layout_height=" Match_parent "Andro" Id:background= "#ccc" android:orientation= "vertical" android:descendantfocusability= "blocksdescendants" > <F
      Ramelayout android:layout_width= "fill_parent" android:layout_height= "wrap_content" > <ImageView Android:id= "@+id/has_exame" android:layout_width= "wrap_content" android:layout_height= "Wrap_content" and roid:layout_gravity= "Top|left"/> <linearlayout android:layout_margin= "10dip" Android:layout_ Width= "Fill_parent" android:layout_height= "wrap_content" android:layout_gravity= "center_vertical" Androi

      d:background= "@drawable/corners" android:layout_weight= "1.0" android:orientation= "vertical" > <textview android:id= "@+id/tv_name "android:layout_width=" match_parent "android:layout_height=" Wrap_content "Android:tex" Tsize= "14SP" android:text= "commercial multiple online" android:textcolor= "#000"/> <linearlayout A Ndroid:layout_width= "Fill_parent" android:layout_height= "wrap_content" android:orientation= "Horizontal" &G

        T <textview android:id= "@+id/tv_date" android:layout_margintop= "10dip" android:layout_width = "Match_parent" android:layout_height= "wrap_content" android:textsize= "12SP" android:text= " 2016-10-10 "android:textcolor=" #000 "android:visibility=" visible "/> <tex Tview android:id= "@+id/tv_downloads" android:layout_width= "Wrap_content" Android:layout_heig ht= "Wrap_content" android:layout_gravity= "center_vertical" android:layout_weight= "1" Android : textcolor= "#000 "android:textsize=" 14sp "android:visibility=" Gone "/> </LinearLayout> ; LinearLayout android:layout_width= "match_parent" android:layout_height= "Match_parent" Android:orie ntation= "Horizontal" android:gravity= "Center|right" > <imageview android:id= "@+id" /tv_praises_img "android:layout_width=" 30dip "android:layout_height=" 30dip "Android:backgrou nd= "@drawable/good_no" android:layout_marginright= "5dip"/> <textview android: Id= "@+id/tv_praises" android:layout_width= "50dip" android:layout_height= "Wrap_content" Andro Id:textcolor= "#000" android:text= "android:textsize=" 14dip "android:layout_gravity=" Cente
          R "/> <imageview android:id=" @+id/tv_step_img "android:layout_width=" 30dip " Android:layout_height= "30dip" android:background= "@drawable/bad_no" android:layout_marginright= "5dip"/&G
        T <textview android:id= "@+id/tv_step" android:layout_width= "50dip" android:layout_height= "W Rap_content "android:textcolor=" #000 "android:text=" android:textsize= "14dip" a ndroid:layout_gravity= "center"/> </LinearLayout> </LinearLayout> </framelayou

 T> </LinearLayout>

Enter the interface after clicking Item

<?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:paddingleft=" @dimen Activity_horizontal_margin "android:paddingright=" @dimen/activity_horizontal_margin "android:paddingtop=" @dimen
  Activity_vertical_margin "android:paddingbottom=" @dimen/activity_vertical_margin "android:orientation=" vertical " > <textview android:layout_width= "wrap_content" android:layout_height= "wrap_content" android:text= "11 1 "/> <textview android:layout_width=" wrap_content android:layout_height= "Wrap_content" android:t ext= "/>" <textview android:layout_width= "wrap_content" android:layout_height= "Wrap_content" an 
    droid:text= "/>" <textview android:layout_width= "wrap_content" android:layout_height= "Wrap_content" android:text= "/>" <textviEW android:layout_width= "wrap_content" android:layout_height= "wrap_content" android:text= "/>"


 ;/linearlayout>

In the code is my understanding of the program, some places may not be very clear, but also perfect
This article gave me a lot of help, animation effect is moved over, haha, very good, learning.

Reference article: http://www.jb51.net/article/97335.htm

The above is the entire content of this article, I hope to help you learn, but also hope that we support the cloud habitat community.