我正在尝试滑动屏幕的某些部分。我使用PageAdapter。在刷卡部分我有三个活动
1. ShowMap
2. ShowAddress
3. ShowContact
我正在尝试获取ShowMap Activity的布局ID，但它显示的是资源未找到异常。这是我的 MyPageAdapter 类
的代码 public class anyclass extends Activity{
private class MyPagerAdapter extends PagerAdapter {
public int getCount(){
return 3;
}
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 = showHotelContact();
break;
case 1:
resId = showHotelAddress();
break;
case 2:
resId = showHotelMap();
break;
}
View view = inflater.inflate(resId, null);
((ViewPager) collection).addView(view, 0);
return view;
}
}
public int showHotelMap()
{
Intent bookIntent = new Intent();
bookIntent.setClass(HotelMap.this,ShowMap.class);
startActivityForResult(bookIntent,RESID);
return RESID;
}
public int showHotelAddress()
{
int resId;
resId = R.layout.hoteladdress;
return resId;
}
public int showHotelContact()
{
int resId;
resId = R.layout.hotelcontact;
return resId;
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
if (resultCode == RESULT_OK) {
RESID = data.getIntExtra("SelectedBook", resultCode);
}
}
}
我需要showMap布局的ID，我试图将它返回到我的PageAdapter，但它显示异常。 这是 ShowMap活动的代码。
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.hotelmap);
int resId = R.layout.hotelmap;
Intent returnIntent = new Intent();
returnIntent.putExtra("SelectedBook",resId);
setResult(RESULT_OK,returnIntent);
finish();
MapView mapView = (MapView) findViewById(R.id.mapView);
mapView.setBuiltInZoomControls(true);
mapView.setStreetView(true);
MapController mc = mapView.getController();
double lat = Double.parseDouble("48.85827758964043"); // latitude
double lon = Double.parseDouble("2.294543981552124"); // longitude
GeoPoint geoPoint = new GeoPoint((int)(lat * 1E6), (int)(lon * 1E6));
mc.animateTo(geoPoint);
mc.setZoom(15);
mapView.invalidate();
List<Overlay> mapOverlays = mapView.getOverlays();
Drawable drawable = this.getResources().getDrawable(R.drawable.ic_launcher);
}
这是我的 Logcat 。
12-31 13:14:26.740: E/AndroidRuntime(31140): android.content.res.Resources$NotFoundException: Resource ID #0x0
12-31 13:14:26.740: E/AndroidRuntime(31140): at android.content.res.Resources.getValue(Resources.java:1104)
12-31 13:14:26.740: E/AndroidRuntime(31140): at android.content.res.Resources.loadXmlResourceParser(Resources.java:2342)
12-31 13:14:26.740: E/AndroidRuntime(31140): at android.content.res.Resources.getLayout(Resources.java:943)
12-31 13:14:26.740: E/AndroidRuntime(31140): at android.view.LayoutInflater.inflate(LayoutInflater.java:394)
12-31 13:14:26.740: E/AndroidRuntime(31140): at android.view.LayoutInflater.inflate(LayoutInflater.java:352)
12-31 13:14:26.740: E/AndroidRuntime(31140): at com..HotelMap$MyPagerAdapter.instantiateItem(HotelMap.java:52)
12-31 13:14:26.740: E/AndroidRuntime(31140): at android.support.v4.view.PagerAdapter.instantiateItem(PagerAdapter.java:110)
12-31 13:14:26.740: E/AndroidRuntime(31140): at android.support.v4.view.ViewPager.addNewItem(ViewPager.java:801)
12-31 13:14:26.740: E/AndroidRuntime(31140): at android.support.v4.view.ViewPager.populate(ViewPager.java:930)
12-31 13:14:26.740: E/AndroidRuntime(31140): at android.support.v4.view.ViewPager.populate(ViewPager.java:881)
答案 0 :(得分：3)
startActivityForResult(bookIntent,RESID);
我猜这是一个异步调用。程序不会等到活动开始活动结束并返回结果，而是执行此行并继续下一行。因此，方法RESID返回的showHotelMap()为 0 。
答案 1 :(得分：0)
尝试这样可以帮助你......
public class TabsViewPagerFragmentActivity extends FragmentActivity implements TabHost.OnTabChangeListener, ViewPager.OnPageChangeListener {
private TabHost mTabHost;
private ViewPager mViewPager;
private HashMap<String, TabInfo> mapTabInfo = new HashMap<String, TabsViewPagerFragmentActivity.TabInfo>();
private PagerAdapter mPagerAdapter;
private class TabInfo {
private String tag;
private Class<?> clss;
private Bundle args;
private Fragment fragment;
TabInfo(String tag, Class<?> clazz, Bundle args) {
this.tag = tag;
this.clss = clazz;
this.args = args;
}
}
class TabFactory implements TabContentFactory {
private final Context mContext;
public TabFactory(Context context) {
mContext = context;
}
/** (non-Javadoc)
* @see android.widget.TabHost.TabContentFactory#createTabContent(java.lang.String)
*/
public View createTabContent(String tag) {
View v = new View(mContext);
v.setMinimumWidth(0);
v.setMinimumHeight(0);
return v;
}
}
/** (non-Javadoc)
* @see android.support.v4.app.FragmentActivity#onCreate(android.os.Bundle)
*/
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// Inflate the layout
setContentView(R.layout.tabs_viewpager_layout);
// Initialise the TabHost
this.initialiseTabHost(savedInstanceState);
if (savedInstanceState != null) {
mTabHost.setCurrentTabByTag(savedInstanceState.getString("tab")); //set the tab as per the saved state
}
// Intialise ViewPager
this.intialiseViewPager();
}
/** (non-Javadoc)
* @see android.support.v4.app.FragmentActivity#onSaveInstanceState(android.os.Bundle)
*/
protected void onSaveInstanceState(Bundle outState) {
outState.putString("tab", mTabHost.getCurrentTabTag()); //save the tab selected
super.onSaveInstanceState(outState);
}
/**
* Initialise ViewPager
*/
private void intialiseViewPager() {
List<Fragment> fragments = new Vector<Fragment>();
fragments.add(Fragment.instantiate(this, Tab1Fragment.class.getName()));
fragments.add(Fragment.instantiate(this, Tab2Fragment.class.getName()));
fragments.add(Fragment.instantiate(this, Tab3Fragment.class.getName()));
this.mPagerAdapter = new PagerAdapter(super.getSupportFragmentManager(), fragments);
//
this.mViewPager = (ViewPager)super.findViewById(R.id.viewpager);
this.mViewPager.setAdapter(this.mPagerAdapter);
this.mViewPager.setOnPageChangeListener(this);
}
/**
* Initialise the Tab Host
*/
private void initialiseTabHost(Bundle args) {
mTabHost = (TabHost)findViewById(android.R.id.tabhost);
mTabHost.setup();
TabInfo tabInfo = null;
TabsViewPagerFragmentActivity.AddTab(this, this.mTabHost, this.mTabHost.newTabSpec("Tab1").setIndicator("Tab 1"), ( tabInfo = new TabInfo("Tab1", Tab1Fragment.class, args)));
this.mapTabInfo.put(tabInfo.tag, tabInfo);
TabsViewPagerFragmentActivity.AddTab(this, this.mTabHost, this.mTabHost.newTabSpec("Tab2").setIndicator("Tab 2"), ( tabInfo = new TabInfo("Tab2", Tab2Fragment.class, args)));
this.mapTabInfo.put(tabInfo.tag, tabInfo);
TabsViewPagerFragmentActivity.AddTab(this, this.mTabHost, this.mTabHost.newTabSpec("Tab3").setIndicator("Tab 3"), ( tabInfo = new TabInfo("Tab3", Tab3Fragment.class, args)));
this.mapTabInfo.put(tabInfo.tag, tabInfo);
// Default to first tab
//this.onTabChanged("Tab1");
//
mTabHost.setOnTabChangedListener(this);
}
/**
* Add Tab content to the Tabhost
* @param activity
* @param tabHost
* @param tabSpec
* @param clss
* @param args
*/
private static void AddTab(TabsViewPagerFragmentActivity activity, TabHost tabHost, TabHost.TabSpec tabSpec, TabInfo tabInfo) {
// Attach a Tab view factory to the spec
tabSpec.setContent(activity.new TabFactory(activity));
tabHost.addTab(tabSpec);
}
/** (non-Javadoc)
* @see android.widget.TabHost.OnTabChangeListener#onTabChanged(java.lang.String)
*/
public void onTabChanged(String tag) {
//TabInfo newTab = this.mapTabInfo.get(tag);
int pos = this.mTabHost.getCurrentTab();
this.mViewPager.setCurrentItem(pos);
}
/* (non-Javadoc)
* @see android.support.v4.view.ViewPager.OnPageChangeListener#onPageScrolled(int, float, int)
*/
@Override
public void onPageScrolled(int position, float positionOffset,
int positionOffsetPixels) {
// TODO Auto-generated method stub
}
/* (non-Javadoc)
* @see android.support.v4.view.ViewPager.OnPageChangeListener#onPageSelected(int)
*/
@Override
public void onPageSelected(int position) {
// TODO Auto-generated method stub
this.mTabHost.setCurrentTab(position);
}
/* (non-Javadoc)
* @see android.support.v4.view.ViewPager.OnPageChangeListener#onPageScrollStateChanged(int)
*/
@Override
public void onPageScrollStateChanged(int state) {
// TODO Auto-generated method stub
}
}
否则从给定的链接获得帮助..
http://thepseudocoder.wordpress.com/2011/10/13/android-tabs-viewpager-swipe-able-tabs-ftw/