实时获取股票数据的android app应用程序源码分享

最近学习Android应用开发，不知道写一个什么样的程序来练练手，正好最近股票很火，就一个App来实时获取股票数据，取名为Mystock。使用开发工具Android Studio，需要从Android官网下载，下载地址：http://developer.android.com/sdk/index.html。不幸的是Android是Google公司的，任何和Google公司相关的在国内都无法直接访问，只能通过VPN访问。

下图为Android Studio打开一个工程的截图：

下面按步介绍Mystock的实现步骤。

1.以下是activa_main.xml的内容。上面一排是三个TextView，分别用来显示上证指数，深圳成指，创业板指。中间一排是一个EditText和一个Button，用来添加股票。下面是一个Table，用来显示添加的股票列表。

应用截图如下：

 2.数据获取，这里使用sina提供的接口来实时获取股票数据，代码如下：

public void querySinaStocks(String list){
    // Instantiate the RequestQueue.
    RequestQueue queue = Volley.newRequestQueue(this);
    String url ="http://hq.sinajs.cn/list=" + list;
    //http://hq.sinajs.cn/list=sh600000,sh600536
    // Request a string response from the provided URL.
    StringRequest stringRequest = new StringRequest(Request.Method.GET, url,
 new Response.Listener() {
   @Override
   public void onResponse(String response) {
     updateStockListView(sinaResponseToStocks(response));
   }
 },
 new Response.ErrorListener() {
   @Override
   public void onErrorResponse(VolleyError error) {
   }
 });
    queue.add(stringRequest);
  }

这里发送Http请求用到了Volley，需要在build.gradle里面添加dependencies：compile 'com.mcxiaoke.volley:library:1.0.19'。

3.定时刷新股票数据，使用了Timer，每隔两秒发送请求获取数据，代码如下：

  Timer timer = new Timer("RefreshStocks");
    timer.schedule(new TimerTask() {
      @Override
      public void run() {
 refreshStocks();
      }
    }, 0, 2000);

  private void refreshStocks(){
    String ids = "";
    for (String id : StockIds_){
      ids += id;
      ids += ",";
    }
    querySinaStocks(ids);
  }

 4.在程序退出时存储股票代码，下次打开App时，可以显示上次的股票列表。代码如下。

 private void saveStocksToPreferences(){
    String ids = "";
    for (String id : StockIds_){
      ids += id;
      ids += ",";
    }
    SharedPreferences sharedPref = getPreferences(Context.MODE_PRIVATE);
    SharedPreferences.Editor editor = sharedPref.edit();
    editor.putString(StockIdsKey_, ids);
    editor.commit();
  }
  @Override
  public void onDestroy() {
    super.onDestroy(); // Always call the superclass
    saveStocksToPreferences();
  }

5.删除选中的股票,在menu_main.xml里面添加一个action。

代码响应事件并删除：

 @Override
  public boolean onOptionsItemSelected(MenuItem item) {
    // Handle action bar item clicks here. The action bar will
    // automatically handle clicks on the Home/Up button, so long
    // as you specify a parent activity in AndroidManifest.xml.
    int id = item.getItemId();
    //noinspection SimplifiableIfStatement
    if (id == R.id.action_settings) {
      return true;
    }
    else if(id == R.id.action_delete){
      if(SelectedStockItems_.isEmpty())
 return true;
      for (String selectedId : SelectedStockItems_){
 StockIds_.remove(selectedId);
 TableLayout table = (TableLayout)findViewById(R.id.stock_table);
 int count = table.getChildCount();
 for (int i = 1; i < count; i++){
   TableRow row = (TableRow)table.getChildAt(i);
   LinearLayout nameId = (LinearLayout)row.getChildAt(0);
   TextView idText = (TextView)nameId.getChildAt(1);
   if(idText != null && idText.getText().toString() == selectedId){
     table.removeView(row);
     break;
   }
 }
      }
      SelectedStockItems_.clear();
    }
    return super.onOptionsItemSelected(item);
  }

屏幕截图：

6.当有大额委托挂单时，发送消息提醒，代码如下：

{
...
      String text = "";
      String sBuy = getResources().getString(R.string.stock_buy);
      String sSell = getResources().getString(R.string.stock_sell);
      if(Double.parseDouble(stock.b1_ )>= StockLargeTrade_) {
 text += sBuy + "1:" + stock.b1_ + ",";
      }
      if(Double.parseDouble(stock.b2_ )>= StockLargeTrade_) {
 text += sBuy + "2:" + stock.b2_ + ",";
      }
      if(Double.parseDouble(stock.b3_ )>= StockLargeTrade_) {
 text += sBuy + "3:" + stock.b3_ + ",";
      }
      if(Double.parseDouble(stock.b4_ )>= StockLargeTrade_) {
 text += sBuy + "4:" + stock.b4_ + ",";
      }
      if(Double.parseDouble(stock.b5_ )>= StockLargeTrade_) {
 text += sBuy + "5:" + stock.b5_ + ",";
      }
      if(Double.parseDouble(stock.s1_ )>= StockLargeTrade_) {
 text += sSell + "1:" + stock.s1_ + ",";
      }
      if(Double.parseDouble(stock.s2_ )>= StockLargeTrade_) {
 text += sSell + "2:" + stock.s2_ + ",";
      }
      if(Double.parseDouble(stock.s3_ )>= StockLargeTrade_) {
 text += sSell + "3:" + stock.s3_ + ",";
      }
      if(Double.parseDouble(stock.s4_ )>= StockLargeTrade_) {
 text += sSell + "4:" + stock.s4_ + ",";
      }
      if(Double.parseDouble(stock.s5_ )>= StockLargeTrade_) {
 text += sSell + "5:" + stock.s5_ + ",";
      }
      if(text.length() > 0)
 sendNotifation(Integer.parseInt(sid), stock.name_, text);
...
}

  public void sendNotifation(int id, String title, String text){
    NotificationCompat.Builder nBuilder =
 new NotificationCompat.Builder(this);
    nBuilder.setSmallIcon(R.drawable.ic_launcher);
    nBuilder.setContentTitle(title);
    nBuilder.setContentText(text);
    nBuilder.setVibrate(new long[]{100, 100, 100});
    nBuilder.setLights(Color.RED, 1000, 1000);
    NotificationManager notifyMgr = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);
    notifyMgr.notify(id, nBuilder.build());
  }

屏幕截图：

以上通过图文并茂的方式给大家分享了一个实时获取股票数据的android app应用程序源码，希望大家喜欢。