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。
<LinearLayout xmlns:android=\"http://schemas.android.com/apk/res/android\"
xmlns:tools=\"http://schemas.android.com/tools\" android:layout_width=\"match_parent\"
android:layout_height=\"match_parent\" android:orientation=\"vertical\" tools:context=\".MainActivity\">
<LinearLayout
android:layout_width=\"match_parent\"
android:layout_height=\"wrap_content\"
android:orientation=\"horizontal\">
<LinearLayout
android:layout_width=\"0dp\"
android:layout_weight=\"0.33\"
android:layout_height=\"wrap_content\"
android:orientation=\"vertical\"
android:gravity=\"center\" >
<TextView
android:layout_width=\"wrap_content\"
android:layout_height=\"wrap_content\"
android:text=\"@string/stock_sh_name\"/>
<TextView
android:layout_width=\"wrap_content\"
android:layout_height=\"wrap_content\"
android:id=\"@+id/stock_sh_index\"/>
<TextView
android:layout_width=\"wrap_content\"
android:layout_height=\"wrap_content\"
android:textSize=\"12sp\"
android:id=\"@+id/stock_sh_change\"/>
</LinearLayout>
<LinearLayout
android:layout_width=\"0dp\"
android:layout_weight=\"0.33\"
android:layout_height=\"wrap_content\"
android:orientation=\"vertical\"
android:gravity=\"center\" >
<TextView
android:layout_width=\"wrap_content\"
android:layout_height=\"wrap_content\"
android:text=\"@string/stock_sz_name\"/>
<TextView
android:layout_width=\"wrap_content\"
android:layout_height=\"wrap_content\"
android:id=\"@+id/stock_sz_index\"/>
<TextView
android:layout_width=\"wrap_content\"
android:layout_height=\"wrap_content\"
android:textSize=\"12sp\"
android:id=\"@+id/stock_sz_change\"/>
</LinearLayout>
<LinearLayout
android:layout_width=\"0dp\"
android:layout_weight=\"0.33\"
android:layout_height=\"wrap_content\"
android:orientation=\"vertical\"
android:gravity=\"center\" >
<TextView
android:layout_width=\"wrap_content\"
android:layout_height=\"wrap_content\"
android:text=\"@string/stock_chuang_name\"/>
<TextView
android:layout_width=\"wrap_content\"
android:layout_height=\"wrap_content\"
android:id=\"@+id/stock_chuang_index\"/>
<TextView
android:layout_width=\"wrap_content\"
android:layout_height=\"wrap_content\"
android:textSize=\"12sp\"
android:id=\"@+id/stock_chuang_change\"/>
</LinearLayout>
</LinearLayout>
<LinearLayout
android:orientation=\"horizontal\"
android:layout_width=\"match_parent\"
android:layout_height=\"wrap_content\">
<EditText
android:layout_width=\"wrap_content\"
android:layout_height=\"wrap_content\"
android:inputType=\"number\"
android:maxLength=\"6\"
android:id=\"@+id/editText_stockId\"
android:layout_weight=\"1\" />
<Button
android:layout_width=\"wrap_content\"
android:layout_height=\"wrap_content\"
android:text=\"@string/button_add_label\"
android:onClick=\"addStock\" />
</LinearLayout>
<!--ListView
android:layout_width=\"wrap_content\"
android:layout_height=\"wrap_content\"
android:id=\"@+id/listView\" /-->
<ScrollView
android:layout_width=\"match_parent\"
android:layout_height=\"wrap_content\">
<TableLayout
android:layout_width=\"match_parent\"
android:layout_height=\"wrap_content\"
android:id=\"@+id/stock_table\"></TableLayout>
</ScrollView>
</LinearLayout>
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<String>() {
@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。
<menu xmlns:android=\"http://schemas.android.com/apk/res/android\"
xmlns:app=\"http://schemas.android.com/apk/res-auto\"
xmlns:tools=\"http://schemas.android.com/tools\" tools:context=\".MainActivity\">
<item android:id=\"@+id/action_settings\" android:title=\"@string/action_settings\"
android:orderInCategory=\"100\" app:showAsAction=\"never\" />
<item android:id=\"@+id/action_delete\" android:title=\"@string/action_delete\"
android:orderInCategory=\"100\" app:showAsAction=\"never\" />
</menu>
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。
本文地址:https://www.stayed.cn/item/16416
转载请注明出处。
本站部分内容来源于网络,如侵犯到您的权益,请 联系我