Question

我使用SherlockActionBar标签创建了应用。我的标签之一包含MapView（谷歌地图v2）。目前我在更改标签时遇到问题（屏幕如下）：

下一个标签应包含ListView。有时上下文第二个标签正确加载我也有刷我的MapView的问题。目前我只能向上和向下滑动方向。我希望有人帮助我。

我的代码：

myfragment.xml

<com.google.android.gms.maps.MapView
    android:id="@+id/mapview"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:clickable="true" />

TabFragment_Map.java

public class TabFragment_Map扩展了SherlockFragment {

MapView mapView;
GoogleMap map;

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
        Bundle savedInstanceState) {
    View view = inflater.inflate(R.layout.map_fragment, container, false);

    mapView = (MapView) view.findViewById(R.id.mapview);
    mapView.onCreate(savedInstanceState);

    map = mapView.getMap();
    map.getUiSettings().setMyLocationButtonEnabled(false);
    map.setMyLocationEnabled(true);

    try {
        MapsInitializer.initialize(this.getActivity());
    } catch (GooglePlayServicesNotAvailableException e) {
        e.printStackTrace();
    }

    CameraUpdate cameraUpdate = CameraUpdateFactory.newLatLngZoom(new LatLng(43.1, -87.9), 10);

    return view;
}

@Override
public void onResume() {
    mapView.onResume();
    super.onResume();
}

@Override
public void onDestroy() {
    mapView.onDestroy();
    super.onDestroy();
}

@Override
public void onLowMemory() {
    mapView.onLowMemory();
    super.onLowMemory();
}

}

MainActivity.java

公共类MainActivity扩展了SherlockFragmentActivity {

ViewPager mViewPager;
TabsAdapter mTabsAdapter;

String TabFragment_Cafes;
String TabFragment_Details;

//Settery & gettery używane w mechanizmie przesyłania informacji pomiędzy fragmentami
public String getTabFragment_Cafes() {
    return TabFragment_Cafes;
}

public void setTabFragment_Cafes(String tabFragment_Cafes) {
    TabFragment_Cafes = tabFragment_Cafes;
}

public String getTabFragment_Details() {
    return TabFragment_Details;
}

public void setTabFragment_Details(String tabFragment_Details) {
    TabFragment_Details = tabFragment_Details;
}

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    mViewPager = new ViewPager(this);
    mViewPager.setId(R.id.pager);
    setContentView(mViewPager);

    final ActionBar bar = getSupportActionBar();
    bar.setNavigationMode(ActionBar.DISPLAY_SHOW_HOME);
    bar.setDisplayOptions(0, ActionBar.DISPLAY_SHOW_TITLE);

    mTabsAdapter = new TabsAdapter(this, mViewPager);
    mTabsAdapter.addTab(bar.newTab().setText("Mapa"), TabFragment_Map.class, null);
    mTabsAdapter.addTab(bar.newTab().setText("Kawiarnie"), TabFragment_Cafes.class, null);
    mTabsAdapter.addTab(bar.newTab().setText("Szczegóły"), TabFragment_Details.class, null);

    if (savedInstanceState != null)
        bar.setSelectedNavigationItem(savedInstanceState.getInt("tab", 0));
}

@Override
protected void onSaveInstanceState(Bundle outState) {
    //super.onSaveInstanceState(outState);
    outState.putInt("tab", getSupportActionBar().getSelectedNavigationIndex());
}

public static class TabsAdapter extends FragmentPagerAdapter implements ActionBar.TabListener, ViewPager.OnPageChangeListener {
    private final Context mContext;
    private final ActionBar mActionBar;
    private final ViewPager mViewPager;
    private final ArrayList<TabInfo> mTabs = new ArrayList<TabInfo>();

    static final class TabInfo {
        private final Class<?> clss;
        private final Bundle args;

        TabInfo(Class<?> _class, Bundle _args) {
            clss = _class;
            args = _args;
        }
    }

    public TabsAdapter(FragmentActivity activity, ViewPager pager) {
        super(activity.getSupportFragmentManager());
        mContext = activity;
        mActionBar = ((SherlockFragmentActivity)activity).getSupportActionBar();
        mViewPager = pager;
        mViewPager.setAdapter(this);
        mViewPager.setOnPageChangeListener(this);
    }

    public void addTab(ActionBar.Tab tab, Class<?> clss, Bundle args) {
        TabInfo info = new TabInfo(clss, args);
        tab.setTag(info);
        tab.setTabListener(this);
        mTabs.add(info);
        mActionBar.addTab(tab);
        notifyDataSetChanged();
    }

    public void onPageScrollStateChanged(int arg0) {}

    public void onPageScrolled(int arg0, float arg1, int arg2) {}

    public void onPageSelected(int position) {
        mActionBar.setSelectedNavigationItem(position);
    }

    public void onTabSelected(Tab tab, FragmentTransaction ft) {
        Object tag = tab.getTag();
        for (int i = 0; i < mTabs.size(); i++) {
            if (mTabs.get(i) == tag)
                mViewPager.setCurrentItem(i);
        }
    }

    public void onTabUnselected(Tab tab, FragmentTransaction ft) {}

    public void onTabReselected(Tab tab, FragmentTransaction ft) {}

    @Override
    public Fragment getItem(int position) {
        TabInfo info = mTabs.get(position);
        return Fragment.instantiate(mContext, info.clss.getName(), info.args);
    }

    @Override
    public int getCount() {
        return mTabs.size();
    }
}

}

Answer 1

您需要一个截取滑动的自定义viewpager

package com.ecs.google.maps.v2.component;

import android.content.Context;
import android.support.v4.view.ViewPager;
import android.util.AttributeSet;
import android.view.View;

public class CustomViewPager extends ViewPager {

    public CustomViewPager(Context context) {
        super(context);
    }

    public CustomViewPager(Context context, AttributeSet attrs) {
        super(context, attrs);
    }

    @Override
    protected boolean canScroll(View v, boolean checkV, int dx, int x, int y) {

        // When using Maps V1       
//        if(v instanceof MapView){
//            return true;
//        }
//        return super.canScroll(v, checkV, dx, x, y);

        // When using Maps V2
        if (v.getClass().getPackage().getName().startsWith("maps.")) {
            return true;
        }
        return super.canScroll(v, checkV, dx, x, y);        
    }

}

将它放在您的布局中：

<com.ecs.google.maps.v2.component.CustomViewPager
        android:id="@+id/pager"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_below="@+id/tabs"
    tools:context=".MainActivity">

滑动手势应该有效。

带有MapView的ActionBar选项卡

1 个答案: