我是Android的新手,我真的需要这样做(我考虑过在另一个Activity
中执行此操作),但任何人都可以向我展示一个简单的代码(只有{{1}没有onCreate()
可以Listview
的情况?
感谢
答案 0 :(得分:55)
如果你有活动的xml布局,包括像这样的listView
<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="@android:id/list"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_weight="fill_parent"
然后在你的onCreate中,你可以有这样的东西
setContentView(R.layout.the_view);
ArrayAdapter<String> adapter = new ArrayAdapter<>(this, android.R.layout.simple_list_item_1, myList);
ListView lv = (ListView)findViewById(android.R.id.list);
lv.setAdapter(adapter);
lv.setOnItemClickListener(new OnItemClickListener()
{
@Override
public void onItemClick(AdapterView<?> a, View v,int position, long id)
{
Toast.makeText(getBaseContext(), "Click", Toast.LENGTH_LONG).show();
}
});
答案 1 :(得分:28)
在res / layout / main.xml文件中包含以下资源:
<ListView
android:id="@+id/id_list_view"
android:layout_width="fill_parent"
android:layout_height="fill_parent" />
your_class.java
import android.widget.ListView;
import android.widget.ArrayAdapter;
public class your_class extends Activity
{
private ListView m_listview;
@Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
m_listview = (ListView) findViewById(R.id.id_list_view);
String[] items = new String[] {"Item 1", "Item 2", "Item 3"};
ArrayAdapter<String> adapter =
new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, items);
m_listview.setAdapter(adapter);
}
}
答案 2 :(得分:11)
以下以编程方式创建一个简单的ListView:
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
String[] myList = new String[] {"Hello","World","Foo","Bar"};
ListView lv = new ListView(this);
lv.setAdapter(new ArrayAdapter<String>(this,android.R.layout.simple_list_item_1,myList));
setContentView(lv);
}
答案 3 :(得分:1)
您还可以引用布局,从代码中实例化布局对象,然后使用Java构建ListView。这为您在运行时设置动态高度和宽度提供了一些灵活性。
答案 4 :(得分:1)
在res / layout / main.xml
中包含以下资源文件<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent">
<ListView
android:id="@+id/listView"
android:layout_width="match_parent"
android:layout_height="match_parent"
</ListView>
</RelativeLayout>
MainActivity.java
public class MainActivity extends Activity {
ListView listView;
String[] listPlanet={"mercury","Venus","Mars","Saturn","Neptune"};
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
listView = (ListView)findViewById(R.id.listView));
ArrayAdapter<String> adapter =
new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, listPlanet);
listview.setAdapter(adapter);
}
}