问题
I am creating a Help page in which I have a set of questions and answers. These questions and answers have different styles. Here is the xml file, which describes the layout of a question & answer set:
<?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="wrap_content"
android:orientation="vertical"
android:layout_gravity="center">
<TextView
android:text="@string/Help_first_question"
android:id="@+id/text1"
android:padding="5dip"
android:background="#e0f3ff"
android:layout_width="fill_parent"
android:layout_height="wrap_content"/>
<LinearLayout
android:id="@+id/panel1"
android:visibility="gone"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="wrap_content">
<TextView
android:layout_margin="2dip"
android:text="@string/Help_first_answer"
android:padding="5dip"
android:background="#FFFFFF"
android:layout_width="fill_parent"
android:layout_height="wrap_content"/>
</LinearLayout>
</LinearLayout>
I want to display multiple questions and answers within a listView
, whereby each row contains a set of the question and the answer. My listview
looks like :
<ListView xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/listview"
android:layout_width="wrap_content"
android:layout_height="wrap_content" >
</ListView>
so it will look like :
first row : Q
A
second row : Q
A
third row : Q
A
What is the best approach for achieving this?
回答1:
create custom adapter and use the below layout to achieve your goal
<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"
tools:context=".MainActivity" >
<TextView
android:id="@+id/textView2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="TextView" />
<TextView
android:id="@+id/textView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="TextView" />
</LinearLayout>
回答2:
You need to implement a custom ListAdapter implementing all of the abstract methods.
Let's create a QuestionAndAnswerListAdapter
, which you can make your ListView
by setting it up in onCreate
:
public void onCreate(Bundle savedInstanceState) {
super(savedInstanceState);
setContentView(R.layout.listview);
QuestionsAndAnswersListAdapter adapter = new QuestionsAndAnswersListAdapter(data);
ListView listView = (ListView) findViewById(R.id.listview);
listView.setAdapter(adapter);
}
The adapter itself would look something like this:
public QuestionsAndAnswersListAdapter implements ListAdapter {
private QuestionAndAnswer[] data;
public QuestionsAndAnswersListAdapter(QuestionAndAnswer[] data) {
this.data = data;
}
public View getView(int position, View view, ViewGroup parent) {
if(view == null) {
//Only creates new view when recycling isn't possible
LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
view = inflater.inflate(R.layout.question_and_answer_list_item, null);
}
QuestionAndAnswer thisQA = data[position];
TextView questionView = (TextView) view.findViewById(R.id.text1);
questionView.setText(thisQA.question);
TextView answerView = (TextView) view.findViewById(R.id.answer);
answerView.setText(thisQA.answer);
return view;
}
// ...
}
getView
is really the central method to get right. The rest of the methods you need to implement to live up to the ListAdapter
interface are pretty straight-forward. Check the reference to see exactly what they are.
来源:https://stackoverflow.com/questions/20755440/how-to-display-multiple-number-of-textviews-inside-each-row-in-listview