Android 學習--ListView 的使用(四)

標籤：android

 基於BaseAdapter 實現ListView

注意擴充BaseAdapter 需要重寫以下四個方法

getCount();

getItem();

getItemId();

getView();

程式清單

package xiaocool.net.listviewtest;import android.graphics.Color;import android.os.Bundle;import android.support.v7.app.ActionBarActivity;import android.view.View;import android.view.ViewGroup;import android.widget.BaseAdapter;import android.widget.ImageView;import android.widget.LinearLayout;import android.widget.ListView;import android.widget.TextView;public class MainActivity extends ActionBarActivity {   private ListView list;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.listview2);        list=(ListView)this.findViewById(R.id.list1);        /*//定義一個數組        String arr[]={"校酷網路1","校酷網路2","校酷網路3","校酷網路4","校酷網路5"};        //將數組封裝成ArrayAdapter        ArrayAdapter<String> adapter=new ArrayAdapter<String>(this,R.layout.array_item,R.id.textView,arr);        list.setAdapter(adapter);*/        BaseAdapter adapter=new BaseAdapter() {            //返回總的清單項目數            @Override            public int getCount() {                return 20;            }            @Override            public Object getItem(int position) {                return null;            }          //返回清單項目的id            @Override            public long getItemId(int position) {                return 0;            }           //返回每個具體item的樣子            @Override            public View getView(int position, View convertView, ViewGroup parent) {               //建立一個LinearLayout，並向其中添加兩個控制項                LinearLayout layout=new LinearLayout(MainActivity.this);                layout.setOrientation(0);                ImageView imageView=new ImageView(MainActivity.this);                imageView.setImageResource(R.drawable.syudio);                TextView textView=new TextView(MainActivity.this);                textView.setText("第"+(position+1)+"項");                textView.setTextColor(Color.BLUE);                textView.setTextSize(20);                layout.addView(imageView);                layout.addView(textView);                return layout;            }        };        list.setAdapter(adapter);    }}

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Android 學習--ListView 的使用(四)