Android listview点赞问题分析

最近这段时间一直在看Android，利用Listview去实现点赞功能

基本思路：

进入界面–》获取数据–》
在Listview中显示–》
通过map集合（position,boolean）保存每一行是否被点击–》
利用实体类去保存相应的对象–》
get/set方法进行相应值得改变–》
点击一次，相应的数量加1

只实现了点赞功能，踩和赞基本类似。

具体实现如下：

继承自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;


public class MainActivityAdapter extends baseAdapter{
//用来获取界面上的元素
 private ViewHolder holder;
 private Context context;
 //这里的Bean是个测试用的内部类，将点赞数和踩得数存起来，可以定义一个类，
 //直接获取数据就好，需要改进下
 private List praise_step_num = new ArrayList();

 private LayoutInflater inflater;
 //保存当前点赞数
 List> listItems;
 
 private Map isExist = new HashMap();

 public MainActivityAdapter(Context context,List> listItems){
 this.context = context;
 this.listItems = listItems;
 inflater = LayoutInflater.from(context);
 Log.i("listItem",listItems.toString());
 init();
 }

 private void init() {
 
 for (int i = 0;i

MainActivity 


进行Listview值赋值，然后进行和Adapter的绑定

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 = {"商用","家用","测试","多联","空气能","商用","家用","测试","多联","空气能"};
 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 = new ArrayList>();

 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 item = new HashMap();
  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(AdapterView parent, View view, int position, long id) {
  Intent intent = new Intent(MainActivity.this,DetailActivity.class);
  startActivity(intent);
  }
 });

 }
}




跳转界面，测试用

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) {
 super.onCreate(savedInstanceState);
 setContentView(R.layout.detail_info);
 }
}



简单的动画效果的实现 


直接用就好了

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(300);
 v.startAnimation(anim);

 }
}


界面




 


 






Listview子项



 


 

 

  

  

  

  


  

  

  
  

  
  

  

 


 





点击item后进入的界面




 
 
 
 
 







代码中是我对程序的理解，有的地方可能不是很明白，还得完善完善 

这篇文章给了我很大帮助，动画效果就是搬过来的，哈哈，很不错，学习了。
参考文章：https://www.jb51.net/article/97335.htm
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持考高分网。