简单的ListView
最后更新于：2022-04-01 14:43:03
每天进步一点点（今天最大的收获是懂了这么多eclipse的快捷键，感觉好方便啊）
下面是一个简单的ListView，前面好像写了一篇类似的文章，只不过前面只是略懂一二，虽然现在也是略懂二三而已。
~~~
package com.example.mylistview;
import java.util.Random;
import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.LinearLayout;
import android.widget.ListView;
import android.widget.TextView;
public class MainActivity extends Activity {
private ListView lv;
private MyAdapter adapter;
private Random rd;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
lv = (ListView) findViewById(R.id.lv);
rd = new Random();
adapter = new MyAdapter();
lv.setAdapter(adapter);
}
private class MyAdapter extends BaseAdapter {
@Override
public int getCount() {
// TODO Auto-generated method stub
return 50;
}
@Override
public Object getItem(int position) {
// TODO Auto-generated method stub
return null;
}
@Override
public long getItemId(int position) {
// TODO Auto-generated method stub
return 0;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
// TODO Auto-generated method stub
TextView tv = new TextView(getApplicationContext());
tv.setText(String.valueOf(rd.nextInt(5000)));
return tv;
}
}
}
~~~
~~~
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/ll"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
tools:context=".MainActivity" >
<ListView
android:id="@+id/lv"
android:layout_width="match_parent"
android:layout_height="match_parent" >
</ListView>
</LinearLayout>
~~~
如果用inflate的话，getView函数可以这样写（不过这之前请写好list_item.xml）
~~~
@Override
public View getView(int position, View convertView, ViewGroup parent) {
// TODO Auto-generated method stub
//TextView tv = new TextView(getApplicationContext());
//tv.setText(String.valueOf(rd.nextInt(5000)));
//return tv;
View view = View.inflate(MainActivity.this, R.layout.list_item, null);
TextView num = (TextView) view.findViewById(R.id.item_num);
num.setText(rd.nextInt(5000)+"");
return view;
}
~~~