我在Android项目中使用Google Maps V2。我在（使用向导）创建了一个带有Scrollable Tabs + Swipe的Activity，在我的一个布局中我正在使用SupportMapFragment，但是在地图中我无法水平滚动地图，当在地图内滑动时它会显示给我另一种观点。这是我的代码：
MainActivity
public class MainActivity extends FragmentActivity {
private List<Fragment> paginas;
/**
* The {@link android.support.v4.view.PagerAdapter} that will provide
* fragments for each of the sections. We use a
* {@link android.support.v4.app.FragmentPagerAdapter} derivative, which
* will keep every loaded fragment in memory. If this becomes too memory
* intensive, it may be best to switch to a
* {@link android.support.v4.app.FragmentStatePagerAdapter}.
*/
SectionsPagerAdapter mSectionsPagerAdapter;
/**
* The {@link ViewPager} that will host the section contents.
*/
ViewPager mViewPager;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
if(paginas==null){
paginas = new ArrayList<Fragment>();
paginas.add(new LocalizacaoPesquisadorActivity());
paginas.add(new VotosPorRegiaoActivity());
}
// Create the adapter that will return a fragment for each of the three
// primary sections of the app.
mSectionsPagerAdapter = new SectionsPagerAdapter(
getSupportFragmentManager());
// Set up the ViewPager with the sections adapter.
mViewPager = (ViewPager) findViewById(R.id.pager);
mViewPager.setAdapter(mSectionsPagerAdapter);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
/**
* A {@link FragmentPagerAdapter} that returns a fragment corresponding to
* one of the sections/tabs/pages.
*/
public class SectionsPagerAdapter extends FragmentPagerAdapter {
public SectionsPagerAdapter(FragmentManager fm) {
super(fm);
}
@Override
public Fragment getItem(int position) {
// getItem is called to instantiate the fragment for the given page.
// Return a DummySectionFragment (defined as a static inner class
// below) with the page number as its lone argument.
switch (position) {
case 0:
return paginas.get(0);
case 1:
return paginas.get(1);
default: return null;
}
}
@Override
public int getCount() {
// Show 3 total pages.
return paginas.size();
}
@Override
public CharSequence getPageTitle(int position) {
Locale l = Locale.getDefault();
switch (position) {
case 0:
return getString(R.string.title_activity_localizacao_pesquisador).toUpperCase(l);
case 1:
return getString(R.string.title_activity_votos_por_regiao).toUpperCase(l);
}
return null;
}
}
}
LocalizacaoPesquisadorActivity
public class LocalizacaoPesquisadorActivity extends Fragment {
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.activity_localizacao_pesquisador,
container, false);
System.out.println();
return rootView;
}
}
activity_main.xml中
<android.support.v4.view.ViewPager xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/pager"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainActivity" >
<android.support.v4.view.PagerTitleStrip
android:id="@+id/pager_title_strip"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="top"
android:background="#33b5e5"
android:paddingBottom="4dp"
android:paddingTop="4dp"
android:textColor="#fff" />
</android.support.v4.view.ViewPager>
activity_localizacao_pesquisador.xml
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:map="http://schemas.android.com/apk/res=auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context=".LocalizacaoPesquisadorActivity" >
<EditText
android:id="@+id/editTextDataLocalizacaoPesquisador"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentRight="true"
android:inputType="none"
android:hint="Data"
android:layout_marginLeft="8dp"
android:layout_marginRight="8dp"
android:layout_marginTop="4dp"
android:layout_marginBottom="4dp"/>
<Spinner
android:id="@+id/spinnerHorarioLocalizacaoPesquisador"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignLeft="@+id/editTextDataLocalizacaoPesquisador"
android:layout_alignRight="@+id/editTextDataLocalizacaoPesquisador"
android:layout_below="@+id/editTextDataLocalizacaoPesquisador"
android:layout_marginTop="4dp"
android:layout_marginBottom="4dp" />
<Button
android:id="@+id/buttonAtualizarLocalizacaoPesquisador"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignLeft="@+id/editTextDataLocalizacaoPesquisador"
android:layout_alignRight="@+id/editTextDataLocalizacaoPesquisador"
android:layout_below="@+id/spinnerHorarioLocalizacaoPesquisador"
android:text="Atualizar"
android:layout_marginTop="4dp"
android:layout_marginBottom="4dp"
android:onClick="atuarlizarMapaLocalizacaoPesquisador" />
<fragment android:id="@+id/mapaLocalizacaoPesquisador"
android:name="com.google.android.gms.maps.SupportMapFragment"
android:layout_below="@+id/buttonAtualizarLocalizacaoPesquisador"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignLeft="@+id/buttonAtualizarLocalizacaoPesquisador"
android:layout_alignRight="@+id/buttonAtualizarLocalizacaoPesquisador"
android:layout_alignParentBottom="true"
android:layout_marginBottom="4dp"
android:layout_marginTop="4dp"
map:cameraTargetLat="-23.531152"
map:cameraTargetLng="-46.789876"
map:cameraZoom="1"
/>
</RelativeLayout>
我想是在拦截滑动动作时它在地图上，您的想法是什么？
答案 0 :(得分：4)
首先，更新您的Android SDK并确保通过从<android-sdk>\extras\android\support\v4\android-support-v4.jar复制来使用最新版本的Android支持库。较旧版本的支持库无法正确处理此问题。
然后扩展ViewPager对象：
/**
* Extension of ViewPager that allows the user to move the map
* inside the fragment, but still supports swiping to the
* next fragment via "bezel swipe" (i.e., swiping from the edge)
*/
public class ViewPagerMapBevelScroll extends android.support.v4.view.ViewPager {
private static final int DEFAULT_SWIPE_MARGIN_WIDTH_DIP = 20;
private int swipeMarginWidth;
public ViewPagerMapBevelScroll(Context context) {
super(context);
setDefaultSwipeMargin(context);
}
public ViewPagerMapBevelScroll(Context context, AttributeSet attrs) {
super(context, attrs);
setDefaultSwipeMargin(context);
}
private void setDefaultSwipeMargin(final Context context) {
swipeMarginWidth = (int) (DEFAULT_SWIPE_MARGIN_WIDTH_DIP * context
.getResources().getDisplayMetrics().density);
}
@Override
protected boolean canScroll(View v, boolean checkV, int dx, int x, int y) {
if (v instanceof ViewPagerMapBevelScroll) {
if (getCurrentItem() == SectionsPagerAdapter.MAP_TAB) {
return !isAllowedMapSwipe(x, dx);
}
}
return super.canScroll(v, checkV, dx, x, y);
}
/**
* Determines if the pointer movement event at x and moved pixels is
* considered an allowed swipe movement overriding the inner horizontal
* scroll content protection.
*
* @param x X coordinate of the active touch point
* @param dx Delta scrolled in pixels
* @return true if the movement should start a page swipe
*/
protected boolean isAllowedMapSwipe(final float x, final float dx) {
return ((x < swipeMarginWidth) && (dx > 0))
|| ((x > (getWidth() - swipeMarginWidth)) && (dx < 0));
}
}
然后，更改布局以使用ViewPagerMapBevelScroll（确保更改包名称以匹配ViewPagerMapBevelScroll对象的位置）：
<com.your.package.ViewPagerMapBevelScroll
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/pager"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainActivity" >
然后，更改您的SectionsPagerAdapter以添加我们在ViewPagerMapBevelScroll中引用的MAP_TAB值，并将其设置为等于包含地图的选项卡的索引：
public class SectionsPagerAdapter extends FragmentStatePagerAdapter {
public static final int MAP_TAB = 0; // Set this equal to
// the index of your map tab
public SectionsPagerAdapter(FragmentManager fm) {
super(fm);
}
...
}
如果您想查看完整版本，请查看开源GPSTest app。
isAllowedMapSwipe方法的归功于Martin Hochstrasser（见http://goo.gl/Hyl2E）
[2013年11月8日更新] - 请注意，根据BornToCode对此答案的评论，使用最新的ViewPager支持库和Google Play服务库，Android 3.0不再需要此解决方法（蜂窝）和更高，但仍然需要在Android 2.3（姜饼）和Android 2.2（Froyo）上获得正确的行为。