Android Open Source - Game-of-thrones-trivia Dynamic Background Activity

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From Project

Back to project page Game-of-thrones-trivia.

License

The source code is released under:

MIT License

Java Source Code

package com.GameOfThrones.Trivia.ui;
// w  w  w  .  ja  v a2s. c om
import java.util.Random;

import android.app.Activity;
import android.app.AlertDialog;
import android.app.Dialog;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.SharedPreferences;
import android.content.pm.PackageInfo;
import android.content.pm.PackageManager;
import android.content.res.Configuration;
import android.os.Bundle;
import android.preference.PreferenceManager;

import com.GameOfThrones.Trivia.R;
import com.GameOfThrones.Trivia.R.drawable;
import com.GameOfThrones.Trivia.R.string;
import com.GameOfThrones.Trivia.core.Session;

/**
 * Used to change the drawable that is used as background image periodically
 * throughout the applications runtime
 * 
 * @author andre
 * 
 */
public abstract class DynamicBackgroundActivity extends Activity {
  /**
   * Used to store which background drawables are being used
   */
  protected Session session = Session.getInstance();

  protected int backgroundPort;
  /**
   * drawable reference to background image when in landscape mode
   */
  protected int backgroundLand;
  /**
   * GameCharacters created created in application
   */

  /**
   * Stores drawable references for landscape mode
   */
  // @TODO must obtain these at runtime
  protected static final int[] landscapePics = new int[] {
      R.drawable.dany_land, R.drawable.eddard_land,
      R.drawable.eddard_land1, R.drawable.jamie_land,
      R.drawable.jamie_land1, R.drawable.ygritte_land,
      R.drawable.y_john_land };

  /**
   * Stores drawable references for landscape mode
   */
  // @TODO must obtain these at runtime
  protected static final int[] portraitPics = new int[] {
      R.drawable.dany_port, R.drawable.eddard_port,
      R.drawable.jamie_port, R.drawable.tyrion_port };

  /*
   * (non-Javadoc)
   * 
   * @see android.app.Activity#onCreate(android.os.Bundle)
   */
  public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
  }

  /**
   * Sets the background drawable that is pre-determined
   */
  public void onResume() {
    super.onResume();
    setBackground(getBackgroundLayout());
  }
  

  /**
   * Sets the background for the current activity
   * 
   * @param backgroundId
   *            - background drawable reference
   */
  final protected void setBackground(int backgroundId) {
    if (this.getApplication().getResources().getConfiguration().orientation == Configuration.ORIENTATION_PORTRAIT) {
      if (backgroundPort == 0) {
        refreshBackground();
      }
      findViewById(backgroundId).setBackgroundResource(backgroundPort);
    } else {
      if (backgroundLand == 0) {
        refreshBackground();
      }
      findViewById(backgroundId).setBackgroundResource(backgroundLand);
    }
  }

  /**
   * Randomly selects new background drawables for both orientations
   */
  final protected void refreshBackground() {
    int resourcePort = portraitPics[new Random()
        .nextInt(portraitPics.length)];
    int resourceLand = landscapePics[new Random()
        .nextInt(landscapePics.length)];

    backgroundPort = resourcePort;
    backgroundLand = resourceLand;

  }

  /**
   * Subclasses will implement this to return the appropriate view background
   * view object
   * 
   * @return
   */
  protected abstract int getBackgroundLayout();

  /**
   * Starts the next activity and finishes current one
   * 
   * @param cls
   *            - the Class signature of Activity to start
   */
  final protected void nextActivity(Class<?> cls) {
    Intent aboutIntent = new Intent(this, cls);
    startActivity(aboutIntent);
    finish();
  }

  /**
   * Starts the next activity, finishes current one and passes information in
   * the form of a Bundle
   * 
   * @param bundle
   *            - Bundle used to send info to next activity
   * @param cls
   *            - the Class signature of Activity to start
   */
  final protected void nextActivity(Bundle bundle, Class<?> cls) {
    Intent aboutIntent = new Intent(this, cls);
    aboutIntent.putExtras(bundle);
    startActivity(aboutIntent);
    finish();
  }

  final static String MY_EMAIL = "akperkins1@gmail.com";

  /**
   * send - Helper function to send an email intent.
   * 
   * @param activity
   *            Activity - instance of activiy that is sending intent -
   * @param str
   *            String - subject
   */
  final protected void sendMail(String str) {
    final Intent emailIntent = new Intent(
        android.content.Intent.ACTION_SEND);

    emailIntent.setType("plain/text");
    emailIntent.putExtra(android.content.Intent.EXTRA_EMAIL,
        new String[] { MY_EMAIL });
    emailIntent.putExtra(android.content.Intent.EXTRA_SUBJECT, str);
    emailIntent.putExtra(android.content.Intent.EXTRA_TEXT, "Text");

    this.startActivity(Intent.createChooser(emailIntent, "Send mail..."));
  }

  final static private String NEW = "NEW";

  /**
   * Obtain package info for Application
   * 
   * @return
   */
  final protected PackageInfo getPackageInfo(Activity mActivity) {
    PackageInfo pi = null;
    try {
      pi = mActivity.getPackageManager().getPackageInfo(
          mActivity.getPackageName(), PackageManager.GET_ACTIVITIES);
    } catch (PackageManager.NameNotFoundException e) {
      e.printStackTrace();
    }
    return pi;
  }

  /**
   * Displays a dialog box. Displays strings stored in string resources.
   * 
   * @param stringIds
   *            - String res ids to display in message
   * @param acceptBooleans
   *            - true if ok and cancel button, false if just ok displayed
   * @param showEverytime
   *            -showEveryTime if true box displays everytime. if false
   *            displays if first time for new version of app
   */
  final protected void showPopUpMessage(int[] stringIds, boolean showEverytime) {
    // Includes the updates as well so users know what changed.
    String message = "";

    for (int stringId : stringIds) {
      message += (this.getString(stringId) + "\n\n");
    }
    showPopUpMessage(message, showEverytime);
  }

  /**
   * Displays a dialog box.
   * 
   * @param message
   *            - String that is shown in dialog box
   * @param acceptButtons
   *            - true if ok and cancel button, false if just ok displayed
   * @param showEveryTime
   *            if true box displays everytime. if false displays if first
   *            time for new version of app
   * 
   */
  // @TODO Refactor this - remove showEveryTime param
  final protected void showPopUpMessage(String message, boolean showEveryTime) {
    PackageInfo versionInfo = getPackageInfo(this);

    /**
     * the eulaKey changes every time you increment the version number in
     * the AndroidManifest.xml
     **/
    final String eulaKey = NEW + versionInfo.versionCode;
    final SharedPreferences prefs = PreferenceManager
        .getDefaultSharedPreferences(this);
    boolean hasBeenShown = prefs.getBoolean(eulaKey, false);

    boolean show = false;

    if (!showEveryTime) {
      show = !hasBeenShown;
    } else {
      show = true;
    }

    if (show) {
      String title = this.getString(R.string.app_name) + " v"
          + versionInfo.versionName;

      AlertDialog.Builder builder = new AlertDialog.Builder(this)
          .setTitle(title)
          .setMessage(message)
          .setPositiveButton(android.R.string.ok,
              new Dialog.OnClickListener() {
                public void onClick(
                    DialogInterface dialogInterface, int i) {
                }
              });
      builder.create().show();
    }
  }
}

Java Source Code List

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