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- package andres.it.myapp.Activity;
- import com.google.gson.Gson;
- import android.content.Intent;
- import android.content.SharedPreferences;
- import android.support.v4.app.Fragment;
- import android.support.v4.app.FragmentActivity;
- import android.support.v4.app.FragmentManager;
- import android.support.v4.app.FragmentPagerAdapter;
- import android.os.Bundle;
- import android.support.v4.view.ViewPager;
- import android.view.View;
- import android.widget.Button;
- import java.util.ArrayList;
- import andres.it.myapp.Holders.SubjectListholderFragment;
- import andres.it.myapp.R;
- public class MainActivity extends FragmentActivity {
- static SectionsPagerAdapter mAdapter;
- static ViewPager mPager;
- Button addButton;
- public static ArrayList<Subject> subjects = new ArrayList<Subject>();
- @Override
- protected void onCreate(Bundle savedInstanceState) {
- super.onCreate(savedInstanceState);
- setContentView(R.layout.activity_main);
- LoadPreferences();
- mAdapter = new SectionsPagerAdapter(getSupportFragmentManager());
- addButton = (Button) findViewById(R.id.addButton);
- mPager = (ViewPager) findViewById(R.id.pager);
- mPager.setAdapter(mAdapter);
- addButton.setOnClickListener(new View.OnClickListener() {
- @Override
- public void onClick(View v) {
- goAddSubjectActivity();
- }
- });
- }
- public class SectionsPagerAdapter extends FragmentPagerAdapter {
- public SectionsPagerAdapter(FragmentManager fm) {
- super(fm);
- }
- @Override
- public Fragment getItem(int position) {
- return new SubjectListholderFragment().newInstance(position);
- }
- @Override
- public int getCount() {
- return 1;
- }
- }
- public void SavePreferences(){
- SharedPreferences sharedPreferences = getSharedPreferences("LISTA",MODE_PRIVATE);
- SharedPreferences.Editor editor = sharedPreferences.edit();
- Gson gson =new Gson();
- for(int i = 0; i < subjects.size(); i++){
- String json = gson.toJson(subjects.get(i));
- editor.putString("Item_list_key"+i,json);
- }
- editor.putInt("size_key", subjects.size());
- editor.commit();
- }
- public void LoadPreferences(){
- SharedPreferences sharedPreferences = getSharedPreferences("LISTA",MODE_PRIVATE);
- int size = sharedPreferences.getInt("size_key",0);
- for(int i = 0 ; i < size; i++){
- String json = sharedPreferences.getString("Item_list_key"+i,"");
- Gson gson = new Gson();
- Subject temp = gson.fromJson(json,Subject.class);
- subjects.clear();
- subjects.add(temp);
- }
- }
- public void goAddSubjectActivity() {
- final Intent intent = new Intent(this, AddSubject.class);
- startActivity(intent);
- }
- @Override
- public void onPause(){
- super.onPause();
- SavePreferences();
- }
- @Override
- public void onDestroy(){
- super.onDestroy();
- SavePreferences();
- }
- @Override
- public void onResume(){
- super.onResume();
- LoadPreferences();
- }
- }
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