Java tutorial
/* * Copyright 2012 The Android Open Source Project * * 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.melbournestore.activities; import android.app.ActionBar; import android.app.Activity; import android.app.ProgressDialog; import android.content.Intent; import android.os.Bundle; import android.os.Handler; import android.os.Message; import android.support.v4.app.NavUtils; import android.view.KeyEvent; import android.view.MenuItem; import android.view.View; import android.view.View.OnClickListener; import android.widget.Button; import android.widget.ListView; import android.widget.TextView; import android.widget.Toast; import com.google.gson.Gson; import com.google.gson.reflect.TypeToken; import com.melbournestore.adaptors.PlateListAdapter; import com.melbournestore.application.SysApplication; import com.melbournestore.db.SharedPreferenceUtils; import com.melbournestore.models.item_iphone; import com.melbournestore.models.number_price; import com.melbournestore.network.ItemManagerThread; import com.melbournestore.utils.MelbourneUtils; import com.nostra13.universalimageloader.core.DisplayImageOptions; import java.lang.reflect.Type; import java.util.ArrayList; public class PlateActivity extends Activity { private static final String TAG = "Melbourne"; DisplayImageOptions options; Gson gson = new Gson(); ProgressDialog progress; private ListView mPlatesList; private PlateListAdapter mPlateListAdapter; private ItemManagerThread mItemThread; private Button mConfirmChoice; private TextView mTotalPrice; private TextView mTotalNum; private int mShopId; private String mShopName; private number_price sumNumberPrice; private float totalPrice = 0; private int totalNum = 0; private ArrayList<item_iphone> mItems = new ArrayList<item_iphone>(); private Handler mHandler = new Handler() { @Override public void handleMessage(Message msg) { Bundle b = msg.getData(); int position = b.getInt("position"); switch (msg.what) { case 0: mItems = (ArrayList<item_iphone>) msg.obj; mPlateListAdapter.refresh(mItems); mPlatesList.setAdapter(mPlateListAdapter); progress.dismiss(); break; // plus = 1 case 1: String itemsString1 = SharedPreferenceUtils.getLocalItems(PlateActivity.this, mShopId); Type type1 = new TypeToken<ArrayList<item_iphone>>() { }.getType(); ArrayList<item_iphone> items1 = gson.fromJson(itemsString1, type1); mItems.clear(); mItems.addAll(items1); mPlateListAdapter.refresh(mItems); //mPlatesList.setAdapter(mPlateListAdapter); sumNumberPrice = MelbourneUtils.sum_item_number_price(PlateActivity.this); totalPrice = sumNumberPrice.getPrice(); totalNum = sumNumberPrice.getNumber(); mTotalPrice.setText("$" + String.valueOf(totalPrice)); mTotalNum.setText(String.valueOf(totalNum)); break; // minus = 2 case 2: if (totalPrice <= 0) { } else { String itemsString2 = SharedPreferenceUtils.getLocalItems(PlateActivity.this, mShopId); Type type2 = new TypeToken<ArrayList<item_iphone>>() { }.getType(); ArrayList<item_iphone> items2 = gson.fromJson(itemsString2, type2); mItems.clear(); mItems.addAll(items2); mPlateListAdapter.refresh(mItems); //mPlatesList.setAdapter(mPlateListAdapter); sumNumberPrice = MelbourneUtils.sum_item_number_price(PlateActivity.this); totalPrice = sumNumberPrice.getPrice(); totalNum = sumNumberPrice.getNumber(); mTotalPrice.setText("$" + String.valueOf(totalPrice)); mTotalNum.setText(String.valueOf(totalNum)); } break; } } }; private long mExitTime; public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.plate_layout); SysApplication.initImageLoader(this); SysApplication.getInstance().addActivity(this); // Set up action bar. final ActionBar actionBar = getActionBar(); // Specify that the Home button should show an "Up" caret, indicating // that touching the // button will take the user one step up in the application's hierarchy. actionBar.setDisplayHomeAsUpEnabled(true); Intent intent = getIntent(); mShopId = intent.getIntExtra("shopid", 0); mShopName = intent.getStringExtra("shopName"); mItemThread = new ItemManagerThread(mHandler, this, mShopId); mItemThread.start(); progress = new ProgressDialog(this, R.style.dialog_loading); progress.show(); getActionBar().setTitle(mShopName); sumNumberPrice = MelbourneUtils.sum_item_number_price(PlateActivity.this); totalPrice = sumNumberPrice.getPrice(); totalNum = sumNumberPrice.getNumber(); mPlatesList = (ListView) findViewById(R.id.plates_list); options = new DisplayImageOptions.Builder().showStubImage(R.drawable.loading_ads) //ImageView .showImageForEmptyUri(R.drawable.loading_ads) //image? .showImageOnFail(R.drawable.loading_ads) //image .cacheInMemory(true) // .cacheOnDisc(true) //? .build(); mPlateListAdapter = new PlateListAdapter(this, mHandler, options, mItems); mPlatesList.setAdapter(mPlateListAdapter); mConfirmChoice = (Button) findViewById(R.id.confirm_choice); mConfirmChoice.bringToFront(); mConfirmChoice.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { Intent intent = new Intent(PlateActivity.this, ShoppingCartActivity.class); startActivity(intent); } }); mTotalPrice = (TextView) findViewById(R.id.confirm_price); mTotalPrice.setText("$" + String.valueOf(totalPrice)); mTotalNum = (TextView) findViewById(R.id.plate_num_total); mTotalNum.setText(String.valueOf(totalNum)); } @Override protected void onResume() { super.onResume(); sumNumberPrice = MelbourneUtils.sum_item_number_price(PlateActivity.this); totalPrice = sumNumberPrice.getPrice(); totalNum = sumNumberPrice.getNumber(); // Intent intent = getIntent(); // mShopId = intent.getIntExtra("shopId", 0); String itemsString = SharedPreferenceUtils.getLocalItems(PlateActivity.this, mShopId); Type type = new TypeToken<ArrayList<item_iphone>>() { }.getType(); ArrayList<item_iphone> items = gson.fromJson(itemsString, type); mItems.clear(); mItems.addAll(items); mPlateListAdapter.refresh(mItems); //mPlatesList.setAdapter(mPlateListAdapter); mTotalNum.setText(String.valueOf(totalNum)); mTotalPrice.setText("$" + String.valueOf(totalPrice)); } // /* The click listner for ListView in the navigation drawer */ // private class PlateItemClickListener implements // ListView.OnItemClickListener { // @Override // public void onItemClick(AdapterView<?> parent, View view, int position, // long id) { // //selectItem(position); // Log.d(TAG, String.valueOf(position)+" plat myorder_list_item clicked"); // } // } // @Override public boolean onOptionsItemSelected(MenuItem item) { switch (item.getItemId()) { case android.R.id.home: // This is called when the Home (Up) button is pressed in the action // bar. // Create a simple intent that starts the hierarchical parent // activity and // use NavUtils in the Support Package to ensure proper handling of // Up. Intent upIntent = NavUtils.getParentActivityIntent(this); upIntent.addFlags(Intent.FLAG_ACTIVITY_REORDER_TO_FRONT); startActivity(upIntent); finish(); return true; } return super.onOptionsItemSelected(item); } public boolean onKeyDown(int keyCode, KeyEvent event) { if (keyCode == KeyEvent.KEYCODE_BACK) { if ((System.currentTimeMillis() - mExitTime) > 2000) { Toast.makeText(this, "??", Toast.LENGTH_SHORT).show(); mExitTime = System.currentTimeMillis(); } else { SysApplication.getInstance().exit(); } return true; } return super.onKeyDown(keyCode, event); } }