通常用於顯示頂部廣告、或者標題。
最簡單demo爲例子,等效果圖如下:
代碼由4個主要文件組成:
MainActivity.java , 顯示控制頁面。
activity_main.xml,顯示頁面的xml,只包括listview。
listview_header.xml,盛放頭視圖需要顯示的所有內容。
item_listview.xml,盛放listview的子項需要顯示的內容。
上代碼:
//MainActivity.java , 顯示控制頁面。
package com.example.listviewheaderview;
import android.support.v7.app.ActionBarActivity;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.AbsListView.LayoutParams;
import android.widget.ArrayAdapter;
import android.widget.Gallery;
import android.widget.ListView;
public class MainActivity extends ActionBarActivity {
private static final String[] NUMBERS = {
"1","2","3","4","5","6","7"
};
// private Gallery gallery;
private View header;
private ListView listView;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
listView = (ListView) findViewById(R.id.listview);
LayoutInflater inflater = LayoutInflater.from(this);
header = inflater.inflate(R.layout.listview_header, listView,false);
ListView.LayoutParams params = new ListView.LayoutParams(ListView.LayoutParams.FILL_PARENT,ListView.LayoutParams.WRAP_CONTENT);
header.setLayoutParams(params);
listView.addHeaderView(header,null,false);
ArrayAdapter<String> adapter = new ArrayAdapter<String>(this, R.layout.item_listview,NUMBERS);
listView.setAdapter(adapter);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
}
//activity_main.xml,顯示頁面的xml,只包括listview。
<RelativeLayout 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:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context="com.example.listviewheaderview.MainActivity" >
<ListView
android:id="@+id/listview"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/hello_world" />
</RelativeLayout>
//listview_header.xml,盛放頭視圖需要顯示的所有內容。
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<ImageView
android:id="@+id/listview_header_webview"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:src="@drawable/ic_launcher" />
</LinearLayout>
//item_listview.xml,盛放listview的子項需要顯示的內容。
<?xml version="1.0" encoding="utf-8"?>
<TextView xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:padding="13dp"
android:text="1"
android:textSize="20dp" >
</TextView>