DialogHandler.java

package fi.bitrite.android.ws.activity;

import android.app.Activity;
import android.support.v7.app.AlertDialog;
import android.app.Dialog;
import android.app.ProgressDialog;
import android.content.DialogInterface;

import fi.bitrite.android.ws.R;

/**
 * Helper class for progress dialogs.
 */
public class DialogHandler {

    public static final int NO_DIALOG = 0;
    public static final int TEXT_SEARCH = 1;
    public static final int AUTHENTICATE = 2;
    public static final int HOST_INFORMATION = 3;
    public static final int HOST_CONTACT = 4;
    public static final int MESSAGES = 5;

    private static boolean inProgress = false;
    private static int currentDialogId = NO_DIALOG;

    private final Activity parentActivity;
    private ProgressDialog progressDialog;

    public DialogHandler(Activity parent) {
        this.parentActivity = parent;
    }

    public void showDialog(int id) {
        if (currentDialogId != id) {
            currentDialogId = id;
            inProgress = true;
            parentActivity.showDialog(id);
        }
    }

    public Dialog createDialog(int id, String message) {
        progressDialog = new ProgressDialog(parentActivity);
        progressDialog.setProgressStyle(ProgressDialog.STYLE_SPINNER);
        progressDialog.setMessage(message);
        progressDialog.setCancelable(false);
        return progressDialog;
    }

    private void showAlertDialog(String message) {
        AlertDialog.Builder builder = new AlertDialog.Builder(parentActivity);
        builder .setMessage(message)
                .setCancelable(true)
                .setPositiveButton(parentActivity.getString(R.string.alert_neutral_button), new DialogInterface.OnClickListener() {
                    public void onClick(DialogInterface dialog, int id) {
                        dialog.dismiss();
                    }
                });
        AlertDialog alert = builder.create();
        alert.show();
    }

    public void alert(String message) {
        showAlertDialog(message);
    }

    public void dismiss() {
        inProgress = false;

        try {
            parentActivity.dismissDialog(currentDialogId);
        } catch (IllegalArgumentException e) {
            // OK - we assume it has been closed earlier
        }

        currentDialogId = NO_DIALOG;
    }

    public static boolean inProgress() {
        return inProgress;
    }
}