我有一个关于 ViewPager 的非常基本的问题。我有一个包含 5 个页面的 ViewPagerActivity，除了 ViewPagerActivity.java 的 setContentView(R.layout.main) 中引用的 main.xml（参见下面的代码）之外，每个页面都有自己的布局 xml。
“中间”页面（middle.xml，它是 5 个布局 xml 之一）包括一个 Listview，它使用来自数据库的数据动态填充。
这是我的问题。我应该在哪里放置以下代码来填充 Listview 并设置 ClickListener？
mMemoListView = (ListView)findViewById(R.id.list_in_middle_layout);
mMemoListAdapter = new MemoListAdapter(this);
mMemoListView.setAdapter(mMemoListAdapter);
mMemoListView.setOnItemClickListener(new OnItemClickListener() {
public void onItemClick(AdapterView<?> arg0, View arg1, int position, long arg3) {
viewMemo(position);
}
});
我不认为它会在 ViewPagerActivity.java 中，除非它可以通过 setContentView() 引用 main.xml 和 middle.xml。我也想过添加一个引用middle.xml的java类，但是我不知道当中间页面膨胀时如何激活它（？）。（请参阅下面的 MyPageAdapter 以了解每个页面是如何膨胀的。）
谢谢阅读。请随时要求进一步澄清。
这是 main.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<android.support.v4.view.ViewPager
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="@+id/myfivepanelpager"/>
</LinearLayout>
这是middle.xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:background="#ffffffff"
>
<RelativeLayout
android:id="@+id/titleLayout"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:background="#ffffffff"
>
<com.ViewPager.TitleBackgroundButton
android:id="@+id/titleBackgroundBtn"
android:layout_width="fill_parent"
android:layout_height="48dp"
android:layout_alignParentTop="true"
android:text="Memo"
android:textSize="18dp"
android:textStyle="bold"
/>
</RelativeLayout>
<ListView
android:id="@+id/list_in_middle_layout"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_margin="4dp"
android:layout_below="@+id/titleLayout"
android:layout_above="@+id/buttonLayout"
android:divider="#00000000"
android:listSelector="#00000000"
android:cacheColorHint="#00000000"
/>
<LinearLayout
android:id="@+id/buttonLayout"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_marginTop="10dp"
android:layout_marginBottom="10dp"
android:layout_alignParentBottom="true"
>
<LinearLayout
android:id="@+id/buttonLayout"
android:orientation="horizontal"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_horizontal"
>
<com.ViewPager.TitleBitmapButton
android:id="@+id/newMemoBtn"
android:layout_width="100dp"
android:layout_height="48dp"
android:text="New"
android:textSize="18dp"
android:textStyle="bold"
android:textColor="#ff420000"
/>
<com.ViewPager.TitleBitmapButton
android:id="@+id/closeBtn"
android:layout_width="100dp"
android:layout_height="48dp"
android:layout_marginLeft="20dp"
android:text="Close"
android:textSize="18dp"
android:textStyle="bold"
android:textColor="#ff420000"
/>
</LinearLayout>
</LinearLayout>
</RelativeLayout>
这是 ViewPagerActivity.java
public class ViewPagerActivity extends Activity {
/** Called when the activity is first created. */
public static final String TAG = "ViewPagerActivity";
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
MyPagerAdapter adapter = new MyPagerAdapter();
ViewPager myPager = (ViewPager) findViewById(R.id.myfivepanelpager);
myPager.setAdapter(adapter);
myPager.setCurrentItem(2);
}
private class MyPagerAdapter extends PagerAdapter {
public int getCount() {
return 5;
}
public Object instantiateItem(View collection, int position) {
LayoutInflater inflater = (LayoutInflater) collection.getContext()
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
int resId = 0;
switch (position) {
case 0:
resId = R.layout.farleft;
break;
case 1:
resId = R.layout.left;
break;
case 2:
resId = R.layout.middle;
break;
case 3:
resId = R.layout.right;
break;
case 4:
resId = R.layout.farright;
break;
}
View view = inflater.inflate(resId, null);
((ViewPager) collection).addView(view, 0);
return view;
}
@Override
public void destroyItem(View arg0, int arg1, Object arg2) {
((ViewPager) arg0).removeView((View) arg2);
}
@Override
public void finishUpdate(View arg0) {
// TODO Auto-generated method stub
}
@Override
public boolean isViewFromObject(View arg0, Object arg1) {
return arg0 == ((View) arg1);
}
@Override
public void restoreState(Parcelable arg0, ClassLoader arg1) {
// TODO Auto-generated method stub
}
@Override
public Parcelable saveState() {
// TODO Auto-generated method stub
return null;
}
@Override
public void startUpdate(View arg0) {
// TODO Auto-generated method stub
}
}