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  • Listview中显示不同的视图布局

    import java.util.ArrayList;

    import android.app.Activity;
    import android.content.Context;
    import android.os.Bundle;
    import android.util.Log;
    import android.view.LayoutInflater;
    import android.view.View;
    import android.view.ViewGroup;
    import android.widget.BaseAdapter;
    import android.widget.CheckBox;
    import android.widget.ImageView;
    import android.widget.LinearLayout;
    import android.widget.ListView;
    import android.widget.TextView;

    public class listViewTest extends Activity {
    /** Called when the activity is first created. */
      ListView listView;
      MyAdapter listAdapter;
      ArrayList<String> listString;

      @Override
      public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        listView = (ListView)this.findViewById(R.id.listview);
        listString = new ArrayList<String>();
        for(int i = 0 ; i < 100 ; i++)
        {
          listString.add(Integer.toString(i));
        }
        listAdapter = new MyAdapter(this);
        listView.setAdapter(listAdapter);
      }

      class MyAdapter extends BaseAdapter{
        Context mContext;
        LinearLayout linearLayout = null;
        LayoutInflater inflater;
        TextView tex;
        final int VIEW_TYPE = 3;
        final int TYPE_1 = 0;
        final int TYPE_2 = 1;
        final int TYPE_3 = 2;

        public MyAdapter(Context context) {
          // TODO Auto-generated constructor stub
          mContext = context;
          inflater = LayoutInflater.from(mContext);
        }

        @Override
        public int getCount() {
          // TODO Auto-generated method stub
          return listString.size();
        }

        //每个convert view都会调用此方法,获得当前所需要的view样式
        @Override
        public int getItemViewType(int position) {
          // TODO Auto-generated method stub
          int p = position%6;
          if(p == 0)
            return TYPE_1;
          else if(p < 3)
            return TYPE_2;
          else if(p < 6)
            return TYPE_3;
          else
            return TYPE_1;
        }

        @Override
        public int getViewTypeCount() {
          // TODO Auto-generated method stub
          return 3;
        }

        @Override
        public Object getItem(int arg0) {
          // TODO Auto-generated method stub
          return listString.get(arg0);
        }

        @Override
        public long getItemId(int position) {
          // TODO Auto-generated method stub
          return position;
        }

        @Override
        public View getView(int position, View convertView, ViewGroup parent) {
          // TODO Auto-generated method stub
          viewHolder1 holder1 = null;
          viewHolder2 holder2 = null;
          viewHolder3 holder3 = null;
          int type = getItemViewType(position);

          //无convertView,需要new出各个控件
          if(convertView == null)
          {
            Log.e("convertView = ", " NULL");

            //按当前所需的样式,确定new的布局
            switch(type)
            {
            case TYPE_1:
              convertView = inflater.inflate(R.layout.listitem1, parent, false);
              holder1 = new viewHolder1();
              holder1.textView = (TextView)convertView.findViewById(R.id.textview1);
              holder1.checkBox = (CheckBox)convertView.findViewById(R.id.checkbox);
              Log.e("convertView = ", "NULL TYPE_1");
              convertView.setTag(holder1);
              break;
            case TYPE_2:
              convertView = inflater.inflate(R.layout.listitem2, parent, false);
              holder2 = new viewHolder2();
              holder2.textView = (TextView)convertView.findViewById(R.id.textview2);
              Log.e("convertView = ", "NULL TYPE_2");
              convertView.setTag(holder2);
              break;
            case TYPE_3:
              convertView = inflater.inflate(R.layout.listitem3, parent, false);
              holder3 = new viewHolder3();
              holder3.textView = (TextView)convertView.findViewById(R.id.textview3);
              holder3.imageView = (ImageView)convertView.findViewById(R.id.imageview);
              Log.e("convertView = ", "NULL TYPE_3");
              convertView.setTag(holder3);
              break;
            }
          }else{
            //有convertView,按样式,取得不用的布局
            switch(type)
            {
            case TYPE_1:
              holder1 = (viewHolder1) convertView.getTag();
              Log.e("convertView !!!!!!= ", "NULL TYPE_1");
              break;
            case TYPE_2:
              holder2 = (viewHolder2) convertView.getTag();
              Log.e("convertView !!!!!!= ", "NULL TYPE_2");
              break;
            case TYPE_3:
              holder3 = (viewHolder3) convertView.getTag();
              Log.e("convertView !!!!!!= ", "NULL TYPE_3");
              break;
            }
          }

        //设置资源
          switch(type)
          {
            case TYPE_1:
              holder1.textView.setText(Integer.toString(position));
              holder1.checkBox.setChecked(true);
              break;
            case TYPE_2:
              holder2.textView.setText(Integer.toString(position));
              break;
            case TYPE_3:
              holder3.textView.setText(Integer.toString(position));
              holder3.imageView.setBackgroundResource(R.drawable.icon);
              break;
          }

          return convertView;
        }
      }

      //各个布局的控件资源
      class viewHolder1{
        CheckBox checkBox;
        TextView textView;
      }

      class viewHolder2{
        TextView textView;
      }

      class viewHolder3{
        ImageView imageView;
        TextView textView;
      }
    }

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  • 原文地址:https://www.cnblogs.com/yixinnb/p/4984978.html
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