ListView中加了头和尾后不显示HeaderView。当ListView高度为精确值时(dp)没问题。但当为match_parent和wrap_content时就只能看到尾了,看不到头(头成是空白了)。
activity_main.xml:
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<ListView
android:id="@+id/lv"
android:layout_width="match_parent"
android:layout_height="match_parent" >
</ListView>
</LinearLayout>
listfooter.xml:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/ll_listfooter"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical" >
<Button
android:id="@+id/btn_load_more"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Loading" />
</LinearLayout>
ActivityMain.java:
ListView lv = null;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
View listfooter = LayoutInflater.from(this).inflate(R.layout.listfooter, null);
lv = (ListView) this.findViewById(R.id.lv);
lv.addFooterView(listfooter, null, true);
lv.addHeaderView(listfooter, null, true);
lv.setAdapter(new ArrayAdapter<String>(this, android.R.layout.simple_expandable_list_item_1,getData()));
Toast.makeText(this, " "+lv.getCount(), Toast.LENGTH_SHORT).show();
}
private List<String> getData(){
List<String> data = new ArrayList<String>();
data.add("测试数据1");
data.add("测试数据2");
data.add("测试数据3");
data.add("测试数据4");
return data;
}