[英]How to create own custom row layout using simple adapter and listview
我需要帮助创建一个自定义列表视图,允许我每行有2个字符串/文本视图。 我一直在研究很多,但我似乎无法理解如何做到这一点。 任何示例代码和帮助将不胜感激。 我知道如何使用simple_list_item_1,但不是我自己的布局。 谢谢。 我的(仍然无法运作)代码
package com.painLogger;
//ALL IMPORTS
public class PainLoggerActivity extends Activity implements OnClickListener,
OnKeyListener {
/** Called when the activity is first created. */
EditText txtItem;
EditText txtItem2;
Button btnAdd;
ListView listItems;
ArrayAdapter < String > aa;
List < HashMap < String, String >> painItems = new ArrayList < HashMap < String, String >> ();
int[] to;
String[] from;
SimpleAdapter adapter;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
txtItem = (EditText) findViewById(R.id.txtItem);
txtItem2 = (EditText) findViewById(R.id.txtItem2);
btnAdd = (Button) findViewById(R.id.btnAdd);
listItems = (ListView) findViewById(R.id.listItems);
btnAdd.setOnClickListener(this);
from = new String[] {
"row_1", "row_2"
};
to = new int[] {
R.id.row1, R.id.row2
};
SimpleAdapter adapter = new SimpleAdapter(this, painItems, R.layout.mylistlayout,
from, to);
listItems.setAdapter(adapter);
}
private void addItem() {
HashMap < String, String > map = new HashMap < String, String > ();
map.put("row_1", txtItem.getText().toString());
map.put("row_2", txtItem2.getText().toString());
painItems.add(map);
adapter.notifyDataSetChanged();
}
@Override
public void onClick(View v) {
if (v == this.btnAdd) {
addItem();
}
}
@Override
public boolean onKey(View v, int keyCode, KeyEvent event) {
if (event.getAction() == KeyEvent.ACTION_DOWN && keyCode ==
KeyEvent.KEYCODE_DPAD_CENTER) { this.addItem();
}
return false;
}
}
参考此问题,请使用此代码。
编辑:添加了hashmap定义
String[] from = new String[] {"row_1", "row_2"};
int[] to = new int[] { R.id.row1, R.id.row2};
List<HashMap<String, String>> fillMaps = new ArrayList<HashMap<String, String>>();
for (int j = 0; j < sourceObj.length(); j++) {
HashMap<String, String> map = new HashMap<String, String>();
map.put("row_1", sourceObj.data1);
map.put("row_2", sourceObj.data2);
fillMaps.add(map);
}
SimpleAdapter adapter = new SimpleAdapter(context, fillMaps, R.layout.yourlayoutname, from, to);
mListView.setAdapter(adapter);
TextViews
的LinearLayout
R.layout.yourlayoutname
引用此列表布局SimpleAdapter adapter = new SimpleAdapter(context, fillMaps, R.layout.result, from, to);
这种方法的好处是它避免了你必须创建任何新对象,并且它不涉及太多代码。
首先,您需要创建视图来保存自定义列表项
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
>
<ListView
android:id="@+id/android:list"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
/>
<TextView
android:id="@+id/android:empty"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:text="No Item to display"/>
</LinearLayout>
之后,您需要为列表项创建一个视图
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="?android:attr/listPreferredItemHeight"
android:padding="6dip">
<LinearLayout
android:orientation="vertical"
android:layout_width="0dip"
android:layout_weight="1"
android:layout_height="fill_parent">
<TextView
android:id="@+id/toptext"
android:layout_width="fill_parent"
android:layout_height="0dip"
android:layout_weight="1"
android:gravity="center_vertical"
/>
<TextView
android:layout_width="fill_parent"
android:layout_height="0dip"
android:layout_weight="1"
android:id="@+id/bottomtext"
android:singleLine="true"
android:ellipsize="marquee"
/>
</LinearLayout>
</LinearLayout>
而且你需要一个自定义类来实现新视图
private class OrderAdapter extends ArrayAdapter<Order> {
private ArrayList<Order> items;
public OrderAdapter(Context context, int textViewResourceId, ArrayList<Order> items) {
super(context, textViewResourceId, items);
this.items = items;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
View v = convertView;
if (v == null) {
//inflate a new view for your list item
LayoutInflater vi = (LayoutInflater)getSystemService(Context.LAYOUT_INFLATER_SERVICE);
v = vi.inflate(R.layout.row, null);
}
Order o = items.get(position);
if (o != null) {
//set text to view
TextView tt = (TextView) v.findViewById(R.id.toptext);
TextView bt = (TextView) v.findViewById(R.id.bottomtext);
if (tt != null) {
tt.setText("Name: "+o.getOrderName()); }
if(bt != null){
bt.setText("Status: "+ o.getOrderStatus());
}
}
return v;
}
}
参考:
http://www.softwarepassion.com/android-series-custom-listview-items-and-adapters/
声明:本站的技术帖子网页,遵循CC BY-SA 4.0协议,如果您需要转载,请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.