Android Open Source - sensorreadout App Rater

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Back to project page sensorreadout.
License

The source code is released under:
Apache License
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Java Source Code

package de.onyxbits.sensorreadout;
/*from w  w  w. j  a  v  a2 s. c  o m*/
import android.app.AlertDialog;
import android.content.ActivityNotFoundException;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.SharedPreferences;
import android.content.pm.PackageManager;
import android.net.Uri;
import android.util.Log;

/**
 * Ask the user about reviewing the app on Google Play after a reasonable
 * amount of time and launches.
 */
class AppRater implements DialogInterface.OnClickListener {

  private static final int DAYS_UNTIL_PROMPT = 7;
  private static final int LAUNCHES_UNTIL_PROMPT = 14;
  private static final String PREFSFILE = "apprater";

  private Context context;

  private AppRater(Context context) {
    this.context = context;
  }

  /**
   * Should be called on every <code>Activity.onCreate()</code>. Checks if the
   * trial period is over and if so brings up a notification dialog.
   * 
   * @param ctx
   *          The application context.
   */
  public static void appLaunched(Context ctx) {
    try {
      // Don't even bother if not installed from Google Play
      PackageManager pm = ctx.getPackageManager();
      String pn = ctx.getPackageName();
      String inst = pm.getInstallerPackageName(pn);
      if (inst == null || !(inst.startsWith("com.google")
          || inst.startsWith("com.android"))) {
        return;
      }
    }
    catch (Exception exp) {
      Log.w("AppRater",exp);
      // Just bailout. Don't even try recovery.
      return;
    }

    SharedPreferences prefs = ctx.getSharedPreferences(PREFSFILE, 0);
    if (prefs.getBoolean("dontshowagain", false)) {
      return;
    }

    SharedPreferences.Editor editor = prefs.edit();

    // Increment launch counter
    long launch_count = prefs.getLong("launch_count", 0) + 1;
    editor.putLong("launch_count", launch_count);

    // Get date of first launch
    Long date_firstLaunch = prefs.getLong("date_firstlaunch", 0);
    if (date_firstLaunch == 0) {
      date_firstLaunch = System.currentTimeMillis();
      editor.putLong("date_firstlaunch", date_firstLaunch);
    }
    editor.commit();

    // Wait at least n days before opening
    if (launch_count >= LAUNCHES_UNTIL_PROMPT) {
      if (System.currentTimeMillis() >= date_firstLaunch
          + (DAYS_UNTIL_PROMPT * 24 * 60 * 60 * 1000)) {
        showRateDialog(ctx);
      }
    }
  }

  /**
   * Just bring up the rating dialog without checking whether or not the trial
   * period has ended
   * 
   * @param ctx
   *          application context
   */
  public static void showRateDialog(Context ctx) {
    AppRater rater = new AppRater(ctx);
    AlertDialog.Builder builder = new AlertDialog.Builder(ctx);
    builder.setTitle(R.string.apprater_title);
    builder.setMessage(R.string.apprater_message);
    builder.setIcon(R.drawable.ic_rate);
    builder.setPositiveButton(R.string.apprater_positive, rater);
    builder.setNegativeButton(R.string.apprater_negative, rater);
    builder.setNeutralButton(R.string.apprater_neutral, rater);
    builder.create().show();
  }

  @Override
  public void onClick(DialogInterface di, int id) {
    SharedPreferences.Editor editor = context
        .getSharedPreferences(PREFSFILE, 0).edit();
    switch (id) {
      case DialogInterface.BUTTON_POSITIVE: {
        try {
          context.startActivity(new Intent(Intent.ACTION_VIEW, Uri
              .parse("market://details?id=" + context.getPackageName())));
        }
        catch (ActivityNotFoundException exp) {

        }
        // Fall through intended!
      }
      case DialogInterface.BUTTON_NEGATIVE: {
        editor.putBoolean("dontshowagain", true);
        break;
      }
      case DialogInterface.BUTTON_NEUTRAL:
      default: {
        // Did the user select "Later" because s/he does not have network access
        // right now or because s/he wants to extend the trial period? Let's
        // assume the later and reset the launch counter, as it is the less
        // pesky option.
        editor.putLong("launch_count", 0);
      }
    }
    editor.commit();
    di.dismiss();
  }
}
Java Source Code List
