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。
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<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>
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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：
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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);
}
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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：
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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);
}
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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。
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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();
}
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5.删除选中的股票,在menu_main.xml里面添加一个action。
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<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>
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代码响应事件并删除：
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@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);
}
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屏幕截图：
6.当有大额委托挂单时，发送消息提醒，代码如下：
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{
...
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());
}
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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。