com.springsource.greenhouse.AbstractGreenhouseListActivity.java Source code

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Here is the source code for com.springsource.greenhouse.AbstractGreenhouseListActivity.java

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/*
 * Copyright 2011 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.springsource.greenhouse;

import org.springframework.http.HttpStatus;
import org.springframework.web.client.HttpClientErrorException;
import org.springframework.web.client.ResourceAccessException;

import android.app.AlertDialog;
import android.app.ListActivity;
import android.app.ProgressDialog;
import android.content.DialogInterface;
import android.content.Intent;
import android.view.Gravity;
import android.widget.Toast;

/**
 * @author Roy Clarkson
 */
public abstract class AbstractGreenhouseListActivity extends ListActivity implements GreenhouseActivity {

    protected static final String TAG = AbstractGreenhouseListActivity.class.getSimpleName();

    private ProgressDialog progressDialog;

    //***************************************
    // GreenhouseActivity methods
    //***************************************
    public MainApplication getApplicationContext() {
        return (MainApplication) super.getApplicationContext();
    }

    public void showProgressDialog() {
        showProgressDialog("Loading. Please wait...");
    }

    public void showProgressDialog(String message) {
        if (progressDialog == null) {
            progressDialog = new ProgressDialog(this);
            progressDialog.setIndeterminate(true);
        }

        progressDialog.setMessage(message);
        progressDialog.show();
    }

    public void dismissProgressDialog() {
        if (progressDialog != null) {
            progressDialog.dismiss();
        }
    }

    //***************************************
    // Protected methods
    //***************************************   
    protected void processException(Exception e) {
        if (e != null) {
            if (e instanceof ResourceAccessException) {
                displayNetworkError();
            } else if (e instanceof HttpClientErrorException) {
                HttpClientErrorException httpError = (HttpClientErrorException) e;
                if (httpError.getStatusCode() == HttpStatus.UNAUTHORIZED) {
                    displayAuthorizationError();
                }
            }
        }
    }

    protected void displayNetworkError() {
        Toast toast = Toast.makeText(this,
                "A problem occurred with the network connection while attempting to communicate with Greenhouse.",
                Toast.LENGTH_LONG);
        toast.setGravity(Gravity.CENTER, 0, 0);
        toast.show();
    }

    protected void displayAuthorizationError() {
        AlertDialog.Builder builder = new AlertDialog.Builder(this);
        builder.setMessage("You are not authorized to connect to Greenhouse. Please reauthorize the app.");
        builder.setCancelable(false);
        builder.setPositiveButton("OK", new DialogInterface.OnClickListener() {
            public void onClick(DialogInterface dialog, int id) {
                signOut();
            }
        });
        AlertDialog alert = builder.create();
        alert.show();
    }

    protected void signOut() {
        getApplicationContext().getConnectionRepository()
                .removeConnections(getApplicationContext().getConnectionFactory().getProviderId());
        startActivity(new Intent(this, MainActivity.class));
        finish();
    }

}