第一章,listview的简易用法(Android)
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第一章,listview的简易用法(Android)
这篇文章主要是练习了安卓listview的arrayadapter和baseadapter的简单填充。
1.arrayadapter填充
布局:
代码:
package com.example.demo02; import android.os.Bundle; import android.app.Activity; import android.view.Menu; import android.widget.ArrayAdapter; import android.widget.ListView; public class MainActivity extends Activity { private ListView main_listview; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); // 初始化控件和数据 initView(); } private void initView() { main_listview = (ListView) this.findViewById(R.id.main_listview); // 初始化数据 ArrayAdapter调试截图:adapter = new ArrayAdapter (this, android.R.layout.simple_list_item_1); for (int i = 0; i < 20; i++) { adapter.add("item-->" + i); } // 为listview添加item main_listview.setAdapter(adapter); } }
2.baseadapter填充
布局:
mainactivity:
package com.example.demo03; import android.app.Activity; import android.os.Bundle; import android.widget.ListView; public class MainActivity extends Activity { private ListView main_listview; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); // 初始化数据 initView(); } private void initView() { // TODO Auto-generated method stub main_listview = (ListView) this.findViewById(R.id.main_listview); MainAdapter adapter = new MainAdapter(this); main_listview.setAdapter(adapter); } }
mainadapter:
package com.example.demo03; import android.content.Context; import android.view.View; import android.view.ViewGroup; import android.widget.BaseAdapter; import android.widget.TextView; public class MainAdapter extends BaseAdapter { private Context context; public MainAdapter(Context context) { this.context = context; } @Override public int getCount() { // TODO Auto-generated method stub return 10; } @Override public Object getItem(int arg0) { // TODO Auto-generated method stub return arg0; } @Override public long getItemId(int arg0) { // TODO Auto-generated method stub return arg0; } @Override public View getView(int arg0, View arg1, ViewGroup arg2) { // TODO Auto-generated method stub TextView tv = new TextView(context); tv.setText("item···>"+arg0); return tv; } }调试截图:
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