Preface: I'm very new to Android. I've looked around, read numerous tutorials and I'm still not grasping the concept here. I will apologize in advance if it is something simple.
I have an activity that is implementing a FragmentPagerAdapter using boilerplate code from the template in Android Studio. My goal is to switch between various instances of the same fragment to track player scores (i.e., same layout, different scores in each). Currently, I am able to switch between what looks to be various fragments. I am able to click buttons on the first fragment to computer the score, but when I switch over to the next fragment and click a button, nothing happens in that fragment but the first fragment's score changes. I think this is because it is only using one fragment and not the 7 that I need. If you could help me figure out how to keep scores saved to each fragment and that the buttons on, say fragment2, only change scores on fragment2.
Here is what I have so far:
package com.brbecker.tabletopcompanion.Games;
import android.app.Activity;
import android.app.Fragment;
import android.app.FragmentManager;
import android.os.Bundle;
import android.support.v13.app.FragmentPagerAdapter;
import android.support.v4.view.ViewPager;
import android.util.Log;
import android.view.Menu;
import android.view.MenuItem;
import android.view.ViewGroup;
import com.brbecker.tabletopcompanion.MainActivity;
import com.brbecker.tabletopcompanion.R;
public class SwipeActivity extends Activity {
private SectionsPagerAdapter mSectionsPagerAdapter;
private ViewPager mViewPager;
// Supposed to be able to create multiple fragment instances and get at them again later.
private SwipeTestFragment player1, player2, player3, player4, player5, player6, player7;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_swipe);
// Create the adapter that will return a fragment for each of the three
// primary sections of the activity.
mSectionsPagerAdapter = new SectionsPagerAdapter(getFragmentManager());
// Set up the ViewPager with the sections adapter.
mViewPager = (ViewPager) findViewById(R.id.container);
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.menu_swipe, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
Then the FragmentPagerAdapter class
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 SwipeTestFragment.
return SwipeTestFragment.newInstance(position + 1);
}
@Override
public int getCount() {
// Show 7 total pages.
return 7;
}
// This method is supposed to save a reference to a created Fragment.
@Override
public Object instantiateItem(ViewGroup container, int position) {
Fragment createdFragment = (Fragment) super.instantiateItem(container, position);
switch (position) {
case 0:
player1 = (SwipeTestFragment) createdFragment;
break;
case 1:
player2 = (SwipeTestFragment) createdFragment;
break;
case 2:
player3 = (SwipeTestFragment) createdFragment;
break;
case 3:
player4 = (SwipeTestFragment) createdFragment;
break;
case 4:
player5 = (SwipeTestFragment) createdFragment;
break;
case 5:
player6 = (SwipeTestFragment) createdFragment;
break;
case 6:
player7 = (SwipeTestFragment) createdFragment;
break;
}
return createdFragment;
}
@Override
public CharSequence getPageTitle(int position) {
switch (position) {
case 0:
return "PLAYER 1";
case 1:
return "PLAYER 2";
case 2:
return "PLAYER 3";
case 3:
return "PLAYER 4";
case 4:
return "PLAYER 5";
case 5:
return "PLAYER 6";
case 6:
return "PLAYER 7";
}
return null;
}
}
Then the Fragment Code:
public class SwipeTestFragment extends Fragment implements View.OnClickListener {
// The fragment argument representing the section number for this fragment.
private static final String ARG_SECTION_NUMBER = "section_number";
public SwipeTestFragment() {
}
// Returns a new instance of this fragment for the given section number.
public static SwipeTestFragment newInstance(int sectionNumber) {
SwipeTestFragment fragment = new SwipeTestFragment();
Bundle args = new Bundle();
args.putInt(ARG_SECTION_NUMBER, sectionNumber);
fragment.setArguments(args);
return fragment;
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
setRetainInstance(true);
View rootView = inflater.inflate(R.layout.fragment_swipe, container, false);
//Set Page Title
TextView playerHeading = (TextView) rootView.findViewById(R.id.playerHeading);
String playerHeadingString = "Player " + getArguments().getInt(ARG_SECTION_NUMBER);
playerHeading.setText(playerHeadingString);
//This section sets up buttons.
ImageButton minusone = (ImageButton) rootView.findViewById(R.id.minusBtn1);
minusone.setOnClickListener(this);
ImageButton plusone = (ImageButton) rootView.findViewById(R.id.plusBtn1);
plusone.setOnClickListener(this);
return rootView;
}
@Override
public void onClick(View v) {
TextView score = (TextView) getActivity().findViewById(R.id.scoreSevenWonders);
TextView coins = (TextView) getActivity().findViewById(R.id.coinsSevenWonders);
switch (v.getId()) {
case R.id.minusBtn1:
String presentvaluestring = coins.getText().toString();
if (Integer.parseInt(presentvaluestring) > 0) {
int presentvalueint = Integer.parseInt(presentvaluestring);
presentvalueint--;
coins.setText(String.valueOf(presentvalueint));
if (presentvalueint % 3 == 2) {
setPlayerScore(-1, score);
}
}
break;
case R.id.plusBtn1:
presentvaluestring = coins.getText().toString();
int presetvalueint = Integer.parseInt(presentvaluestring);
presentvalueint++;
if ((presentvalueint % 3) == 0) {
setPlayerScore(1, score);
}
coins.setText(String.valueOf(presentvalueint));
break;
}
}
public TextView setPlayerScore(int increment, TextView total) {
String totalstring = total.getText().toString();
int totalint = Integer.parseInt(totalstring); //see if Integer.parseInt(total.getText().toString()) will work
totalint += increment;
total.setText(String.valueOf(totalint));
return total;
}
}
I think it has something to do with the getItem() method, but I'm not sure. I am more than happy to provide additional code if necessary.
