代码控制：
....
if (pro.equals("1")) {
cityAdapter = ArrayAdapter.createFromResource(
MainActivity.this, R.array.station1,
android.R.layout.simple_spinner_dropdown_item);
sr4.setAdapter(cityAdapter);
sr4.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
@Override
public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
String strstation = MainActivity.this.getResources().getStringArray(R.array.station1)[position];
sr4Val = strstation;
}
@Override
public void onNothingSelected(AdapterView<?> parent) {
}
});
}
.....
demo图
使用okhttps获得json数据，get方式
相应的as添加jar包方式：
打开路径：file->project Structure->Depndences->app->+号 搜索相应的包即可
博主用的是 okhttp:2.7.5的包
public void SendGetRequest(final String url,final String startpos,final String endpos){
new Thread(new Runnable() {
@Override
public void run() {
try {
OkHttpClient client = new OkHttpClient();//创建OkHttpClient对象
Request request = new Request.Builder()
.url("http://139.9.90.185/getShortestPath?start="+startpos+"&end="+endpos)//请求接口。如果需要传参拼接到接口后面。
.build();//创建Request 对象
Response response = null;
response = client.newCall(request).execute();//得到Response 对象
if (response.isSuccessful()) {
Log.d("kwwl","response.code()=="+response.code());
Log.d("kwwl","response.message()=="+response.message());
//
Log.d("kwwl","res=="+response.body().string());
String resdata = response.body().string();
System.out.println(resdata);
//此时的代码执行在子线程，修改UI的操作请使用handler跳转到UI线程。
JSONObject jsonObject = new JSONObject(resdata);
String code = (jsonObject.getString("code"));
if(Integer.parseInt(code)==0) {
String resultpath = (jsonObject.getString("msg"));
String resultnum = (jsonObject.getString("stationnum"));
show("站点数:" + resultnum + "\n" + "站点最短路径:" + resultpath);
Toast.makeText(MainActivity.this,"正在搜索中,请稍后",Toast.LENGTH_SHORT).show();
}else{
String msg = (jsonObject.getString("msg"));
show("提示信息:"+msg);
Toast.makeText(MainActivity.this,"提示信息:"+msg,Toast.LENGTH_SHORT).show();
}
//
System.out.println(result);
}else{
show("请求出错,请选择正确的站点请求");
Toast.makeText(MainActivity.this,"请求出错,请选择正确的站点请求",Toast.LENGTH_SHORT).show();
}
} catch (Exception e) {
e.printStackTrace();
}
}
}).start();
}
//显示在下方的TextView中
private void show(final String result) {
runOnUiThread(new Runnable() {
@Override
public void run() {
textShowPaths.setText(result);
}
});
}
