我想使用Horizontal View Pager创建一些滚动视图.左视图必须具有全屏宽度,但只有四分之一宽度(它将是Dolphin浏览器中的垂直面板).有可能这样做吗？我在正确的布局中改变了
android：layout_width,但它没有用.
我的代码：
public class TestActivity extends FragmentActivity {
@Override
public void onCreate(final Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main_view);
MyPagerAdapter adapter = new MyPagerAdapter();
ViewPager pager = (ViewPager) findViewById(R.id.panelPager);
pager.setAdapter(adapter);
pager.setCurrentItem(0);
}
}
main_view.xml
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical" >
<android.support.v4.view.ViewPager
android:id="@+id/panelPager"
android:layout_width="match_parent"
android:layout_height="match_parent" />
</LinearLayout>
MyPagerAdapter.java
public class MyPagerAdapter extends PagerAdapter {
@Override
public int getCount() {
return 2;
}
@Override
public Object instantiateItem(final View collection,final int position) {
LayoutInflater inflater =
(LayoutInflater) collection.getContext().getSystemService(Context.LAYOUT_INFLATER_SERVICE);
int resId = 0;
switch (position) {
case 0:
resId = R.layout.left;
break;
case 1:
resId = R.layout.right;
break;
}
View view = inflater.inflate(resId,null);
((ViewPager) collection).addView(view,0);
return view;
}
@Override
public void destroyItem(final View arg0,final int arg1,final Object arg2) {
((ViewPager) arg0).removeView((View) arg2);
}
@Override
public boolean isViewFromObject(final View arg0,final Object arg1) {
return arg0 == ((View) arg1);
}
left.xml
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<TextView
android:id="@+id/textView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="LEFT" />
</LinearLayout>
right.xml
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="50dp"
android:layout_height="match_parent"
android:orientation="vertical"
android:background="@color/light_blue" >
<TextView
android:id="@+id/textView2"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="RIGHT"/>
</LinearLayout>
解决方法
检查Murphy在
this question上的答案.你需要在PagerAdapter类上覆盖PagerAdapter的getPageWidth()方法,例如：
@Override
public float getPageWidth(int page) {
if(page==0) {
Display display = getWindowManager().getDefaultDisplay();
Point size = new Point();
display.getSize(size);
return (float)LEFT_FRAGMENT_PIXEL_WIDTH / size.x;
}
else
return super.getPageWidth(page);
}
