如何使自定义的ListView [英] How to make custom ListView
问题描述
我有一个TextView而且越来越它的列表。
I've got a TextView and it's getting a list in it.
public class Home extends ListActivity {
ListView listView;
static final String[] Liste = {"a", "b", "c"};
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setTitle("CalcPlus");
listView = getListView();
//Own row layout
listView.setAdapter(new ArrayAdapter<String>(this,
R.layout.activity_home, R.id.text, Liste));
//listView.setOnItemClickListener(this);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.activity_home, menu);
return true;
}
现在我想列表项的小灰的描述,喜欢这里:
Now I want a small grey description of the list item, like here:
我看了这些教程: 1 和 2 ,但我不得不承认,我不明白他们在说什么。 有人能解释如何使用它们?我一定要删除我的TextView /名单我现在有吗?有另一种方式做一点说明,不使用自定义的ListView?
I read these tutorials: 1 and 2 but I have to admit, I don't understand what they say. Can someone explain how to use them? Do I have to remove my TextView/List I have now? Is there another way to make a little description, without using a custom ListView?
下面是我的xml:
<?xml version="1.0" encoding="utf-8"?>
<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" >
<ListView android:id="@android:id/list"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:divider="#b5b5b5"
android:dividerHeight="1dp"
android:listSelector="@drawable/list_selector" />
<TextView
android:id="@+id/text"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:layout_centerVertical="true"
android:text=""
android:textAllCaps="false"
android:textSize="22dp"
android:textStyle="bold"
android:layout_marginBottom="50dp"
android:layout_marginTop="50dp"
android:layout_marginLeft="2dp"/>
我真的不使用ListView控件列表,只用于测试目的。
I don't really use the listview "list", just for testing purposes.
推荐答案
您需要了解以下行
listView.setAdapter(new ArrayAdapter<String>(this,
R.layout.activity_home, R.id.text, Liste));
意味着你要使用 layout.activity_home.xml
为您的列表中的每个项目的看法。
所以,我不明白为什么有一个ListView里面......
means that you want to use layout.activity_home.xml
for each item's view of your list.
So I don't see why there is a ListView inside it...
在默认情况下一个ArrayAdapter使用每个项目一个单独的文本字段。如果你想要一个更复杂的项目布局,你需要重写你的适配器 getView()
方法。
By default the ArrayAdapter uses one single text field per item. If you want a more complex item layout, you need to override the getView()
method of your adapter.
下面是我能想到的最简单的办法:
Here is the simplest solution I can think of:
在Home.java:
In Home.java:
public class Home extends ListActivity {
ListView listView;
static final String[] Liste = {"a", "b", "c"};
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setTitle("CalcPlus");
listView = getListView();
listView.setAdapter(new ArrayAdapter<String>(this, R.layout.list_item, R.id.text, Liste) {
@Override
public View getView(int position, View convertView, ViewGroup parent) {
View view = super.getView(position, convertView, parent);
String item = getItem(position);
TextView subTitleView = (TextView) view.findViewById(R.id.subtitle);
subTitleView.setText("Subtitle of " + item);
return view;
}
});
}
}
和布局/ list_item.xml
:
<?xml version="1.0" encoding="utf-8"?>
<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"
android:padding="10dp" >
<TextView
android:id="@+id/text"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:layout_centerVertical="true"
android:text=""
android:textAllCaps="false"
android:textSize="22dp"
android:textStyle="bold" />
<TextView
android:id="@+id/subtitle"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:layout_centerVertical="true"
android:text=""
android:textAllCaps="false"
android:textSize="16dp"
android:textStyle="normal" />
</LinearLayout>
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