每天進步一點點(今天最大的收獲是懂了這么多eclipse的快捷鍵,感覺好方便啊)
下面是一個簡單的ListView,前面好像寫了一篇類似的文章,只不過前面只是略懂一二,雖然現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的話,getView函數可以這樣寫(不過這之前請寫好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;
}
~~~
- 前言
- 安卓ListView一個簡單代碼的注釋和探討
- 安卓wifi熱點編程代碼的若干注釋
- 安卓距離傳感器編程
- 簡單的ScrollView
- 簡單的ListView
- 簡單的ArrayAdapter
- AsyncTask的初步學習
- AsyncTask再度學習
- Handler初步學習
- 開啟系統Activity
- 隱式調用Activity
- Activity的生命周期
- startActivityForResult的初步學習
- 多點觸控拉伸圖片
- LruCache圖片緩存技術
- SQLiteOpenHelper數據庫操作
- 短信攔截器
- 簡單的Notification
- ListView優化以及checkbox狀態問題
- 安卓多線程下載
- 安卓JSON解析初步探討
- 選項卡樣式的fragment
- DrawerLayout實現簡單的側滑功能
- 安卓軟引用解決圖片OOM問題
- 安卓隱式Intent啟動Activity和BroadcastReceiver若干注意點
- Dialog學習筆記
- ActionBar使用