Android中Listview點贊功能的實現_Android

最近這段時間一直在看Android，利用Listview去實現點贊功能，下面給大家介紹下基本思路。

基本思路：

進入介面–》擷取資料–》
在Listview中顯示–》
通過map集合（position,boolean）儲存每一行是否被點擊–》
利用實體類去儲存相應的對象–》
get/set方法進行相應值得改變–》
點擊一次，相應的數量加1

只實現了點贊功能，踩和贊基本類似。

具體實現如下：

繼承自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;/*** Created by gz on 2016/11/9.*/public class MainActivityAdapter extends BaseAdapter{//用來擷取介面上的元素private ViewHolder holder;private Context context;//這裡的Bean是個測試用的內部類，將點贊數和踩得數存起來，可以定義一個類，//直接擷取資料就好，需要改進下private List<Bean> praise_step_num = new ArrayList<Bean>();private LayoutInflater inflater;//儲存當前點贊數List<Map<String,Object>> listItems;/*根據position，儲存點擊的是哪一行資料，預設為false，點擊後改為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() {/*為相應的資料賦值，所有的資料存放區在listItems中position一一對應每一行資料*/for (int i = 0;i<listItems.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()+"");}}@Overridepublic int getCount() {return listItems.size() ;}@Overridepublic Object getItem(int position) {return position;}@Overridepublic long getItemId(int position) {return position;}@Overridepublic View getView(final int position, View convertView, ViewGroup parent) {//擷取贊、踩得值final Bean 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")+"");/*每次會複用convertView,convertView沒有被賦值，就會使用之後賦值的資料，比如：點擊了第一行資料贊的按鈕，相應的第一行點贊圖片變為紅色當向下滑動頁面時，下方的也會有一項資料發生變化，複用在這裡為每次重用賦值*/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;}@Overridepublic void onClick(final View v) {Log.i("position",position+"");if(bean.getPraise()==0){if(isExist.get(position) == false){final Handler handler = new Handler() {@Overridepublic void handleMessage(Message msg) {super.handleMessage(msg);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, "失敗", Toast.LENGTH_LONG).show();break;}}};new Thread(){@Overridepublic void run() {Message msg = new Message();msg.what=1;handler.sendMessage(msg);}}.start();}}else{Toast.makeText(context, "已經點擊過", 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;}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

進行Listview值賦值，然後進行和Adapter的綁定

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","測試","多聯","空氣能","商用","家用","測試","多聯","空氣能"};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<String,Object>> map = new ArrayList<Map<String, Object>>();private ListView listView;@Overrideprotected 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() {@Overridepublic void onItemClick(AdapterView<?> parent, View view, int position, long id) {Intent intent = new Intent(MainActivity.this,DetailActivity.class);startActivity(intent);}});}}

跳轉介面，測試用

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 {@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.detail_info);}}

簡單的動畫效果的實現

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);}}

介面

<?xml version="1.0" encoding="utf-8"?><RelativeLayoutxmlns: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"><ListViewandroid:id="@+id/listview"android:layout_width="match_parent"android:layout_height="wrap_content"></ListView></RelativeLayout>

Listview子項

<?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"android:background="#ccc"android:orientation="vertical"android:descendantFocusability= "blocksDescendants"><FrameLayoutandroid:layout_width="fill_parent"android:layout_height="wrap_content" ><ImageViewandroid:id="@+id/has_exame"android:layout_width="wrap_content"android:layout_height="wrap_content"android:layout_gravity="top|left"/><LinearLayoutandroid:layout_margin="10dip"android:layout_width="fill_parent"android:layout_height="wrap_content"android:layout_gravity="center_vertical"android:background="@drawable/corners"android:layout_weight="1.0"android:orientation="vertical"><TextViewandroid:id="@+id/tv_name"android:layout_width="match_parent"android:layout_height="wrap_content"android:textSize="14sp"android:text="商用多聯機"android:textColor="#000"/><LinearLayoutandroid:layout_width="fill_parent"android:layout_height="wrap_content"android:orientation="horizontal" ><TextViewandroid:id="@+id/tv_date"android:layout_marginTop="10dip"android:layout_width="match_parent"android:layout_height="wrap_content"android:textSize="12sp"android:text="時間 2016-10-10"android:textColor="#000"android:visibility="visible"/><TextViewandroid:id="@+id/tv_downloads"android:layout_width="wrap_content"android:layout_height="wrap_content"android:layout_gravity="center_vertical"android:layout_weight="1"android:textColor="#000"android:textSize="14sp"android:visibility="gone" /></LinearLayout><LinearLayoutandroid:layout_width="match_parent"android:layout_height="match_parent"android:orientation="horizontal"android:gravity="center|right"><ImageViewandroid:id="@+id/tv_praises_img"android:layout_width="30dip"android:layout_height="30dip"android:background="@drawable/good_no"android:layout_marginRight="5dip"/><TextViewandroid:id="@+id/tv_praises"android:layout_width="50dip"android:layout_height="wrap_content"android:textColor="#000"android:text="10"android:textSize="14dip"android:layout_gravity="center"/><ImageViewandroid:id="@+id/tv_step_img"android:layout_width="30dip"android:layout_height="30dip"android:background="@drawable/bad_no"android:layout_marginRight="5dip"/><TextViewandroid:id="@+id/tv_step"android:layout_width="50dip"android:layout_height="wrap_content"android:textColor="#000"android:text="10"android:textSize="14dip"android:layout_gravity="center"/></LinearLayout></LinearLayout></FrameLayout></LinearLayout>

點擊item後進入的介面

<?xml version="1.0" encoding="utf-8"?><LinearLayoutxmlns: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"><TextViewandroid:layout_width="wrap_content"android:layout_height="wrap_content"android:text="111"/><TextViewandroid:layout_width="wrap_content"android:layout_height="wrap_content"android:text="111"/><TextViewandroid:layout_width="wrap_content"android:layout_height="wrap_content"android:text="111"/><TextViewandroid:layout_width="wrap_content"android:layout_height="wrap_content"android:text="111"/><TextViewandroid:layout_width="wrap_content"android:layout_height="wrap_content"android:text="111"/></LinearLayout>

代碼中是我對程式的理解，有的地方可能不是很明白，還得完善完善

這篇文章給了我很大協助，動畫效果就是搬過來的，哈哈，很不錯，學習了

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

以上所述是小編給大家介紹的Android中Listview點贊功能的實現，希望對大家有所協助，如果大家有任何疑問歡迎給我留言，小編會及時回複大家的！