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Android动态加载ListView中的Item

时间:2014-07-30 11:42:23      阅读:316      评论:0      收藏:0      [点我收藏+]

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我这周上网看到动态增加listview的每一项item的布局,今天抽空自己写了一个,方便自己日后使用,这个效果还是很不错的,用到了Adapter的notifyDataSetChanged()方法,当点击每一个Item的时候,就通知adapter更新getView,系统得到通知就相应的加载一遍布局,就达到了动态加载item布局的效果。希望给大家带来点启迪,有问题或想要代码的可以留言,欢迎大家留言谈论listview的一些知识,以求共同进步,转载请标明出处:

http://blog.csdn.net/wdaming1986/article/details/6787455

 

                               程序开启界面,默认选中贝贝item,                   点击晶晶后的界面的效果,

                          bubuko.com,布布扣                 bubuko.com,布布扣

 

                                      点击欢欢后界面的效果:                                      点击迎迎后界面的效果:

                          bubuko.com,布布扣                 bubuko.com,布布扣

 

                                     点击妮妮后界面的效果:

                           bubuko.com,布布扣

 

代码奉上,真理还得看代码:

在ListViewRunDemo工程中,

com.cn.daming包中的MainActivity.java类中的代码:

 
  1. package com.cn.daming;  
      
    import android.app.ListActivity;  
    import android.content.Context;  
    import android.os.Bundle;  
    import android.view.Gravity;  
    import android.view.LayoutInflater;  
    import android.view.View;  
    import android.view.ViewGroup;  
    import android.widget.AdapterView;  
    import android.widget.AdapterView.OnItemClickListener;  
    import android.widget.BaseAdapter;  
    import android.widget.ImageView;  
    import android.widget.LinearLayout;  
    import android.widget.TextView;  
      
    public class MainActivity extends ListActivity {  
      
        private ListAddLayoutAdapter mAdapter;  
        @SuppressWarnings("unused")  
        private LayoutInflater lInflater;;  
          
        int[] image = {  
                R.drawable.s_beibei,  
                R.drawable.s_jingjing,  
                R.drawable.s_huanhuan,  
                R.drawable.s_yingying,  
                R.drawable.s_nini  
            };  
          
        String[] show_name = {  
                "贝贝",  
                "晶晶",  
                "欢欢",  
                "迎迎",  
                "妮妮"  
            };  
          
        private int id = 0;  
        @SuppressWarnings("unused")  
        private int last = 0;   
          
        @Override  
        public void onCreate(Bundle savedInstanceState) {  
            super.onCreate(savedInstanceState);  
            mAdapter = new ListAddLayoutAdapter(this);  
            this.setListAdapter(mAdapter);  
             
            this.getListView().setOnItemClickListener(new OnItemClickListener(){  
                public void onItemClick(AdapterView<?> arg0, View arg1, int position,  
                        long arg3) {  
                    id = position;  
                    mAdapter.notifyDataSetChanged();  
                    last = position;  
                }  
            });  
        }  
          
         public class ListAddLayoutAdapter extends BaseAdapter {  
      
            private Context context;  
            private MainActivity activity;   
              
            public ListAddLayoutAdapter(Context context) {  
                this.context = context;  
                this.activity = (MainActivity)context;  
                lInflater = activity.getLayoutInflater();  
            }  
               
            public int getCount() {  
                return image.length;  
            }  
      
            public Object getItem(int arg0) {  
                return null;  
            }  
      
            public long getItemId(int position) {  
                return position;  
            }  
      
            public View getView(int position, View arg1, ViewGroup arg2) {  
                LinearLayout layout = new LinearLayout(context);  
                layout.setOrientation(LinearLayout.VERTICAL);  
                layout.setPadding(0, 8, 0, 8);  
                  
                layout.addView(addTitleView(position));  
                  
                if(id==position){  
                    layout.addView(addCustomView(position));  
                }  
                  
                return layout;  
            }  
              
            public View addTitleView(int i){  
                LinearLayout layout = new LinearLayout(context);  
                layout.setOrientation(LinearLayout.HORIZONTAL);  
                  
                ImageView iv = new ImageView(context);  
                iv.setImageResource(image[i]);  
                layout.addView(iv,  
                        new LinearLayout.LayoutParams(  
                                LinearLayout.LayoutParams.WRAP_CONTENT,   
                                LinearLayout.LayoutParams.WRAP_CONTENT));  
                  
                  
                TextView tv = new TextView(context);  
                tv.setText(show_name[i]);  
                tv.setTextSize(18f);  
                layout.addView(tv,  
                        new LinearLayout.LayoutParams(  
                                LinearLayout.LayoutParams.WRAP_CONTENT,   
                                LinearLayout.LayoutParams.WRAP_CONTENT));  
                  
                layout.setGravity(Gravity.CENTER);  
                return layout;  
            }  
              
              
            public View addCustomView(int i){  
                View view = new View(context);  
                  
                switch(i){  
                    case 0:  
                        ImageView iv1 = new ImageView(context);  
                        iv1.setImageResource(R.drawable.beibei);  
                        view = iv1;  
                        break;  
                          
                    case 1:  
                        ImageView iv2 = new ImageView(context);  
                        iv2.setImageResource(R.drawable.jingjing);  
                        view = iv2;  
                        break;  
                          
                    case 2:  
                        ImageView iv3= new ImageView(context);  
                        iv3.setImageResource(R.drawable.huanhuan);  
                        view = iv3;  
                        break;  
                    case 3:  
                        ImageView iv4 = new ImageView(context);  
                        iv4.setImageResource(R.drawable.yingying);  
                        view = iv4;  
                        break;  
                    case 4:  
                        ImageView iv5 = new ImageView(context);  
                        iv5.setImageResource(R.drawable.nini);  
                        view = iv5;  
                        break;  
                }  
                return view;  
             }  
         }  
    }  

     

 

说明:也可以动态加载布局文件也可以的:

在addCustomView()方法中这么写也是可以的:

 
<span style="font-size:16px;">case 1:  
    view = lInflater.inflate(R.layout.main, null);  
    break;  
  
</span>  

 

 

工程的图片没有上传,希望大家自己找些图片就可以了:

bubuko.com,布布扣

Android动态加载ListView中的Item,布布扣,bubuko.com

Android动态加载ListView中的Item

标签:android   style   blog   http   color   java   使用   os   

原文地址:http://www.cnblogs.com/niray/p/3877490.html

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