Android Open Source - Planets Main Activity

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Back to project page Planets.

License

The source code is released under:

Apache License

Java Source Code

package com.andrewq.planets;
//from  www .j a v a 2 s . c  om

import android.app.AlertDialog;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.SharedPreferences;
import android.os.Bundle;
import android.preference.PreferenceManager;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentActivity;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentStatePagerAdapter;
import android.support.v4.view.ViewPager;
import android.view.Menu;
import android.view.MenuItem;
import android.view.WindowManager;

public class MainActivity extends FragmentActivity {

  ViewPager viewPager;
  
  
  // constants which act as keys for sending Bundle values to PlanetFragment
  public static final String TITLE = "title";
  public static final String DESCRIPTIONS = "descriptions";

  // set up arrays from String resources in order to dynamically build a PlanetFragment. These get passed in via the MyAdapter constructor
  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    viewPager = (ViewPager) findViewById(R.id.pager);
    String[] sun = getResources().getStringArray(R.array.Sun);
    String[] mercury = getResources().getStringArray(R.array.Mercury);
    String[] venus = getResources().getStringArray(R.array.Venus);
    String[] earth = getResources().getStringArray(R.array.Earth);
    String[] mars = getResources().getStringArray(R.array.Mars);
    String[] jupiter = getResources().getStringArray(R.array.Jupiter);
    String[] saturn = getResources().getStringArray(R.array.Saturn);
    String[] uranus = getResources().getStringArray(R.array.Uranus);
    String[] neptune = getResources().getStringArray(R.array.Neptune);
    
    viewPager.setAdapter(new MyAdapter(getSupportFragmentManager(),sun, mercury,venus,earth,mars,jupiter,saturn,uranus,neptune));
  }

  @Override
  protected void onResume() {
    super.onResume();
  }

  @Override
  public boolean onCreateOptionsMenu(Menu menu) {
    getMenuInflater().inflate(R.menu.main_menu, menu);
    return true;
  }

  @Override
  public boolean onOptionsItemSelected(MenuItem item) {
    super.onOptionsItemSelected(item);

    switch (item.getItemId()) {
    case R.id.action_about:
      aboutMenuItem();
      break;
    case R.id.action_settings:
      Intent intent = new Intent(getApplicationContext(), Settings.class);
      startActivity(intent);
      break;
    }

    return super.onOptionsItemSelected(item);
  }

  @Override
  public void onWindowFocusChanged(boolean hasFocus) {
    SharedPreferences getPrefs = PreferenceManager
        .getDefaultSharedPreferences(getBaseContext());
    boolean box = getPrefs.getBoolean("pref_wakelock", true);
    // shorthand for what you previously had here. When you evaluate an IF statement it checks to see if what you have placed inside the parenthesis evaluates to true or false
    if (box) {
      getWindow()
          .addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);
    } else {
      getWindow().clearFlags(
          WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);
    }
    super.onWindowFocusChanged(hasFocus);
  }

  public void aboutMenuItem() {
    new AlertDialog.Builder(this)
        .setTitle("A Message from the Developer")
        .setMessage(
            "Hello! I would like to thank you for downloading this app and "
                + "I think you'll find it useful. \n\n"
                + "This app is useful whether you are a young child, a student, a parent, or just someone who wants to learn more about the solar system you live in. "
                + "There are facts here about the celestial bodies in our solar system. \n\n"
                + "I'm a student in high school and intend to study computer science at M.I.T. With technology advancing every day, "
                + "a job in the tech industry is one of my goals that I think will be very successful. "
                + "This application has been a work in progress and has overcome a lot of technical challenges. "
                + "I hope that this app is useful for you and that it suits all your needs! \n\n"
                + "Thank you.")
        .setNeutralButton("OK", new DialogInterface.OnClickListener() {

          @Override
          public void onClick(DialogInterface arg0, int arg1) {

          }
        }).show();
  }
}

class MyAdapter extends FragmentStatePagerAdapter {
  
  
  private static final String[] PLANETS = {"Sun","Mercury","Venus","Earth","Mars","Jupiter","Saturn","Uranus","Neptune"};
  private final String[] SUN;
  private final String[] MERCURY;
  private final String[] VENUS;
  private final String[] EARTH;
  private final String[] MARS;
  private final String[] JUPITER;
  private final String[] SATURN;
  private final String[] URANUS;
  private final String[] NEPTUNE;

  public MyAdapter(FragmentManager fm,String[]sun, String[] mercury, String[] venus, String[] earth, String[] mars, String[] jupiter, String[] saturn, String[] uranus, String[] neptune) {
    super(fm);
    this.SUN = sun;
    this.MERCURY = mercury;
    this.VENUS = venus;
    this.EARTH = earth;
    this.MARS = mars;
    this.JUPITER = jupiter;
    this.SATURN = saturn;
    this.URANUS = uranus;
    this.NEPTUNE = neptune;
  }

  // Use one PlanetFragment and dynamically build it according to the items in the corresponding array.
  @Override
  public Fragment getItem(int position) {
    Fragment fragment = new PlanetFragment();
    Bundle bundle = new Bundle();
    String planet = getPlanet(position);
    String[] planetDetails = getPlanetDetails(planet);
    bundle.putString(MainActivity.TITLE, PLANETS[position]);
    bundle.putStringArray(MainActivity.DESCRIPTIONS, planetDetails);
    fragment.setArguments(bundle);
    return fragment;
  }
  
  // Find from the PLANETS array the item at index "position"
  public String getPlanet(int position){
    String planet = PLANETS[position];
    return planet;
  }
  
  // Use the previously found item in the PLANETS array and return the array with that planet name
  public String[] getPlanetDetails(String planet){
    String[] planetDetails = null;
    if(planet.equals("Sun")){
      return SUN;
    }
    else if(planet.equals("Mercury")){
      return MERCURY;
    }
    else if(planet.equals("Venus")){
      return VENUS;
    }
    else if(planet.equals("Earth")){
      return EARTH;
    }
    else if(planet.equals("Mars")){
      return MARS;
    }
    else if(planet.equals("Jupiter")){
      return JUPITER;
    }
    else if(planet.equals("Saturn")){
      return SATURN;
    }
    else if(planet.equals("Uranus")){
      return URANUS;
    }
    else if(planet.equals("Neptune")){
      return NEPTUNE;
    }
    
    return planetDetails;
  }

  @Override
  public int getCount() {
    return 9;
  }
  
  @Override
  public CharSequence getPageTitle(int position) {
    return PLANETS[position];
  }
}

Java Source Code List

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