Android动态加载ListView中的Item

2022-09-15 12:58:05

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，

点击欢欢后界面的效果：点击迎迎后界面的效果：

点击妮妮后界面的效果：

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：

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：

[java] view plain copy print ?

<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：

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

Android动态加载ListView中的Item

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