Java example source code file (GsonProguardExampleActivity.java)

This example Java source code file (GsonProguardExampleActivity.java) is included in the alvinalexander.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

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Java - Java tags/keywords

activity, android, app, application, arraylist, buyer, camper',creditcard:'4111-1111-1111-1111, cart, gson, happy, json, lineitem, object, override, stringbuilder, textview, usd, util, widget

The GsonProguardExampleActivity.java Java example source code

/*
 * Copyright (C) 2011 Google Inc.
 *
 * 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.google.gson.examples.android;

import java.util.ArrayList;
import java.util.List;

import android.app.Activity;
import android.os.Bundle;
import android.widget.TextView;

import com.google.gson.Gson;
import com.google.gson.examples.android.model.Cart;
import com.google.gson.examples.android.model.LineItem;

/**
 * Activity class illustrating how to use proguard with Gson
 *
 * @author Inderjeet Singh
 */
public class GsonProguardExampleActivity extends Activity {
  @Override
  public void onCreate(Bundle icicle) {
    super.onCreate(icicle);
    setContentView(R.layout.main);
    TextView tv = (TextView) findViewById(R.id.tv);
    Gson gson = new Gson();
    Cart cart = buildCart();
    StringBuilder sb = new StringBuilder();
    sb.append("Gson.toJson() example: \n");
    sb.append("  Cart Object: ").append(cart).append("\n");
    sb.append("  Cart JSON: ").append(gson.toJson(cart)).append("\n");
    sb.append("\n\nGson.fromJson() example: \n");
    String json = "{buyer:'Happy Camper',creditCard:'4111-1111-1111-1111',"
      + "lineItems:[{name:'nails',priceInMicros:100000,quantity:100,currencyCode:'USD'}]}";
    sb.append("Cart JSON: ").append(json).append("\n");
    sb.append("Cart Object: ").append(gson.fromJson(json, Cart.class)).append("\n");
    tv.setText(sb.toString());
    tv.invalidate();
  }

  private Cart buildCart() {
    List<LineItem> lineItems = new ArrayList();
    lineItems.add(new LineItem("hammer", 1, 12000000, "USD"));
    return new Cart(lineItems, "Happy Buyer", "4111-1111-1111-1111");
  }
}