PFB我的代码，我的要求和我的研究
要求：
我有4个标签（标签A，B，C，D）有4个不同的片段（每个相应标签上有片段A，B，C，D），它们附有viewpager
我可以使用FragmentStatePagerAdapter帮助滑动标签，它可以保存要刷卡的片段的状态
现在我在片段中有一个列表说片段A，它有一个按钮，我需要调用它来说新片段A1。
我已经参考了堆栈网站链接：Replace Fragment inside a ViewPager
但是TabA上的FragmentA消失了，并且没有在标签A上显示FragmentA1是什么问题。请帮助
我的PageAdapter .java类
import java.util.List;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentPagerAdapter;
import android.support.v4.app.FragmentStatePagerAdapter;
/**
* The <code>PagerAdapter</code> serves the fragments when paging.
* @author mwho
*/
public class PagerAdapter extends FragmentStatePagerAdapter {
private List<Fragment> fragments;
private final FragmentManager mFragmentManager = null;
private Fragment mFragmentAtPos0;
/**
* @param fm
* @param fragments
*/
public PagerAdapter(FragmentManager fm, List<Fragment> fragments) {
super(fm);
this.fragments = fragments;
}
/* (non-Javadoc)
* @see android.support.v4.app.FragmentPagerAdapter#getItem(int)
*/
@Override
public Fragment getItem(int position) {
if (position == 0)
{
if (mFragmentAtPos0 == null)
{
mFragmentAtPos0 = FarmerInformationFragment.newInstance(new FirstPageFragmentListener()
{
public void onSwitchToNextFragment()
{
mFragmentManager.beginTransaction().remove(mFragmentAtPos0).commit();
mFragmentAtPos0 = FieldVisitFragment.newInstance();
notifyDataSetChanged();
}
});
}
return mFragmentAtPos0;
}
else
return FieldVisitFragment.newInstance();
// return this.fragments.get(position);
}
/* (non-Javadoc)
* @see android.support.v4.view.PagerAdapter#getCount()
*/
@Override
public int getCount() {
return this.fragments.size();
}
@Override
public int getItemPosition(Object object)
{
if (object instanceof FarmerInformationFragment && mFragmentAtPos0 instanceof FieldVisitFragment)
return POSITION_NONE;
return POSITION_UNCHANGED;
}
}
界面
public interface FirstPageFragmentListener {
void onSwitchToNextFragment();
}
FragmentA1
import com.example.fms.R;
import android.annotation.SuppressLint;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.LinearLayout;
@SuppressLint("NewApi")
public class FieldVisitFragment extends Fragment {
public static FieldVisitFragment newInstance() {
FieldVisitFragment f = new FieldVisitFragment();
return f;
}
/** (non-Javadoc)
* @see android.support.v4.app.Fragment#onCreateView(android.view.LayoutInflater, android.view.ViewGroup, android.os.Bundle)
*/
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
if (container == null) {
// We have different layouts, and in one of them this
// fragment's containing frame doesn't exist. The fragment
// may still be created from its saved state, but there is
// no reason to try to create its view hierarchy because it
// won't be displayed. Note this is not needed -- we could
// just run the code below, where we would create and return
// the view hierarchy; it would just never be used.
return null;
}
return (LinearLayout)inflater.inflate(R.layout.yield_estimation_screen2_layout, container, false);
}
}
片段A
import com.example.fms.R;
import android.annotation.SuppressLint;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentTransaction;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;
import android.widget.ListView;
import android.widget.RelativeLayout;
import android.widget.Toast;
@SuppressLint("NewApi")
public class FarmerInformationFragment extends Fragment {
ListView mLandHoldingList , mFamilyDetailsList , mBankDetailsList , mOtherDetailsList;
ImageView mArrowLandHolding , mArrowFamilyHolding , mArrowBankHolding , mArrowOtherHolding ;
RelativeLayout mLandHoldingRelativeLayout , mFamilyDetailsRelativeLayout , mBankDetailsRelativeLayout , mOtherDetailsRelativeLayout ;
static boolean mLandFlg =false , mFamilyFlg = false , mBankFlg = false , mOtherDetailsFlg = false ;
BroadT mScreenTimeOutReceiver;
BroadcastReceiver mBroadcastReceiver;
static FirstPageFragmentListener firstPageFragmentListenerFrag;
public static FarmerInformationFragment newInstance(FirstPageFragmentListener firstPageFragmentListener) {
FarmerInformationFragment f = new FarmerInformationFragment();
firstPageFragmentListenerFrag = firstPageFragmentListener;
return f;
}
/** (non-Javadoc)
* @see android.support.v4.app.Fragment#onCreateView(android.view.LayoutInflater, android.view.ViewGroup, android.os.Bundle)
*/
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
if (container == null) {
// We have different layouts, and in one of them this
// fragment's containing frame doesn't exist. The fragment
// may still be created from its saved state, but there is
// no reason to try to create its view hierarchy because it
// won't be displayed. Note this is not needed -- we could
// just run the code below, where we would create and return
// the view hierarchy; it would just never be used.
return null;
}
View view = inflater.inflate(R.layout.tab_frag_farmer_info_layout, container,false);
mScreenTimeOutReceiver = new BroadT();
mLandHoldingList = (ListView)view.findViewById(R.id.landHoldingList);
mFamilyDetailsList = (ListView)view.findViewById(R.id.familyDetailsList);
mBankDetailsList = (ListView)view.findViewById(R.id.bankDetailsList);
mOtherDetailsList = (ListView)view.findViewById(R.id.otherDetailsList);
mLandHoldingList.setAdapter(new LandHoldingListAdapter(getActivity(),null ,mScreenTimeOutReceiver,FarmerInformationFragment.this.getActivity()));
mArrowLandHolding = (ImageView)view.findViewById(R.id.arrowLandHolding);
mArrowFamilyHolding = (ImageView)view.findViewById(R.id.arrowFamily);
mArrowBankHolding = (ImageView)view.findViewById(R.id.arrowBank);
mArrowOtherHolding = (ImageView)view.findViewById(R.id.arrowOther);
mLandHoldingRelativeLayout = (RelativeLayout)view.findViewById(R.id.landrel);
mFamilyDetailsRelativeLayout = (RelativeLayout)view.findViewById(R.id.familyrel);
mBankDetailsRelativeLayout = (RelativeLayout)view.findViewById(R.id.bankrel);
mOtherDetailsRelativeLayout = (RelativeLayout)view.findViewById(R.id.otherrel);
// Land
mLandHoldingRelativeLayout.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View arg0) {
if(mLandFlg)
{
mArrowLandHolding.setImageDrawable(getResources().getDrawable(R.drawable.down_aarow));
mLandHoldingList.setVisibility(View.VISIBLE);
mLandFlg = false;
}
else
{
mArrowLandHolding.setImageDrawable(getResources().getDrawable(R.drawable.up_aarow));
mLandHoldingList.setVisibility(View.GONE);
mLandFlg = true;
}
}
});
// Family
mFamilyDetailsRelativeLayout.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View arg0) {
if(mFamilyFlg)
{
mArrowFamilyHolding.setImageDrawable(getResources().getDrawable(R.drawable.down_aarow));
mFamilyDetailsList.setVisibility(View.VISIBLE);
mFamilyFlg = false;
}
else
{
mArrowFamilyHolding.setImageDrawable(getResources().getDrawable(R.drawable.up_aarow));
mFamilyDetailsList.setVisibility(View.GONE);
mFamilyFlg = true;
}
}
});
// Bank
mBankDetailsRelativeLayout.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View arg0) {
if(mBankFlg)
{
mArrowBankHolding.setImageDrawable(getResources().getDrawable(R.drawable.down_aarow));
mBankDetailsList.setVisibility(View.VISIBLE);
mBankFlg = false;
}
else
{
mArrowBankHolding.setImageDrawable(getResources().getDrawable(R.drawable.up_aarow));
mBankDetailsList.setVisibility(View.GONE);
mBankFlg = true;
}
}
});
// Other
mOtherDetailsRelativeLayout.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View arg0) {
if(mOtherDetailsFlg)
{
mArrowOtherHolding.setImageDrawable(getResources().getDrawable(R.drawable.down_aarow));
mOtherDetailsList.setVisibility(View.VISIBLE);
mOtherDetailsFlg = false;
}
else
{
mArrowOtherHolding.setImageDrawable(getResources().getDrawable(R.drawable.up_aarow));
mOtherDetailsList.setVisibility(View.GONE);
mOtherDetailsFlg = true;
}
}
});
/* mBroadcastReceiver = new BroadcastReceiver() {
@Override
public void onReceive(Context context, Intent intent) {
Toast.makeText(context, "Recived",
Toast.LENGTH_LONG).show();
FieldVisitFragment fieldvisitFragment = new FieldVisitFragment();
FragmentManager fragmentManager = getFragmentManager();
FragmentTransaction fragmentTransaction = fragmentManager
.beginTransaction();
fragmentTransaction.replace(android.R.id.tabcontent, fieldvisitFragment);
fragmentTransaction.commit();
}
};*/
return view;
}
}
我的BaseAdapter来自选项卡A上的片段A列表，其上有一个按钮，我可以将其称为片段A1
import java.util.ArrayList;
import java.util.HashMap;
import com.example.fms.R;
import android.annotation.SuppressLint;
import android.annotation.TargetApi;
import android.app.Activity;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.IntentFilter;
import android.os.Build;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentActivity;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentTransaction;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.webkit.WebView.FindListener;
import android.widget.BaseAdapter;
import android.widget.ImageView;
import android.widget.TextView;
import android.widget.Toast;
public class LandHoldingListAdapter extends BaseAdapter{
private LayoutInflater mInflater;
private ArrayList<HashMap<String, String>> allElementDetails;
private Context con;
BroadcastReceiver mBroadcastReceiver;
FragmentActivity fragmentActivity;
public LandHoldingListAdapter (Context context,
ArrayList<HashMap<String, String>> mapData , BroadcastReceiver mBroadcastReceiver, FragmentActivity fragmentActivity)
{
mInflater = LayoutInflater.from(context);
allElementDetails = mapData;
con = context;
this.mBroadcastReceiver = mBroadcastReceiver;
this.fragmentActivity=fragmentActivity;
}
@Override
public int getCount() {
/*return allElementDetails.size();*/
return 1 ;
}
@Override
public Object getItem(int position) {
//return allElementDetails.get(position);
return 1;
}
@Override
public long getItemId(int position) {
return 1;
}
@Override
public View getView(final int position, View convertView, ViewGroup parent) {
//HashMap<String, String> map = new HashMap<String, String>();
//map = allElementDetails.get(position);
convertView = mInflater.inflate(R.layout.farmer_info_land_holding_table_row, null);
TextView rsNumberTxt = (TextView) convertView.findViewById(R.id.RSnumberTxt);
TextView type = (TextView) convertView.findViewById(R.id.type);
TextView year = (TextView) convertView.findViewById(R.id.year);
ImageView visitImg = (ImageView)convertView.findViewById(R.id.visitButton);
ImageView yieldImg = (ImageView)convertView.findViewById(R.id.yieldButton);
ImageView landImg = (ImageView)convertView.findViewById(R.id.landButton);
visitImg.setOnClickListener(new View.OnClickListener() {
@SuppressWarnings("static-access")
@TargetApi(Build.VERSION_CODES.HONEYCOMB) @SuppressLint("NewApi") @Override
public void onClick(View arg0) {/*
Toast.makeText(con, "Visit Clicked ", Toast.LENGTH_LONG).show();
con.registerReceiver(mBroadcastReceiver, new IntentFilter(
"start.fragment.action"));
*/
Toast.makeText(con, "clicked!", Toast.LENGTH_SHORT).show();
FragmentTransaction ft = fragmentActivity.getSupportFragmentManager().beginTransaction();
ft.replace(R.id.viewpager, new FieldVisitFragment().newInstance());
ft.setTransition(FragmentTransaction.TRANSIT_FRAGMENT_OPEN);
ft.addToBackStack(null);
ft.commit();
}
});
return convertView;
}
}