新建UpdateTextTask.java文件 ---名称自定义，注意导包，事件自行修改。

public class UpdateTextTask extends AsyncTask<Void,Integer,String> {
private Context context;
private String url;
private String postValue;
private TextView text;
public UpdateTextTask(Context context,String string,String postValue,TextView text){
this.context = context;
this.url = string;
this.postValue = postValue;
this.text = text;
}
@Override
protected void onPreExecute(){
Toast.makeText(context,"执行",Toast.LENGTH_SHORT).show();
// super.onPreExecute();
}
@Override
protected String doInBackground(Void... params){
int i=0;
while(i<10){
i++;
publishProgress(i);
try{
Thread.sleep(1000);
}catch(InterruptedException e){}
}
String result = Common.postGetJson(url,postValue);
return result;
}
@Override
protected void onPostExecute(String i){
Toast.makeText(context,i,Toast.LENGTH_SHORT).show();
text.setText(i);
}
@Override
protected void onProgressUpdate(Integer... values){
text.setText(""+values[0]);
}
}

新建Common文件 ---自定义文件名，和上一个文件放一起，可创建一个utils文件夹。

public class Common {
public static String postGetJson(String url,String content){
try{
URL murl = new URL(url);
HttpURLConnection httpURLConnection = (HttpURLConnection) murl.openConnection();
httpURLConnection.setConnectTimeout(15000);
httpURLConnection.setReadTimeout(15000);
httpURLConnection.setRequestMethod("POST");
httpURLConnection.setRequestProperty("Connection","keep-alive");
httpURLConnection.setRequestProperty("Content-Type","application/json");
httpURLConnection.setRequestProperty("charset","UTF-8");
httpURLConnection.setDoInput(true);
httpURLConnection.setDoOutput(true);
httpURLConnection.setUseCaches(false);
httpURLConnection.connect();
DataOutputStream dos = new DataOutputStream(httpURLConnection.getOutputStream());
System.out.println(content);
String postContent = content;
dos.write(postContent.getBytes());
dos.flush();
dos.close();
int responseCode = httpURLConnection.getResponseCode();
System.out.println(responseCode);
if(responseCode == 200){
InputStream is = httpURLConnection.getInputStream();
ByteArrayOutputStream message = new ByteArrayOutputStream();
int len = 0;
byte buffer[] = new byte[1024];
while((len=is.read(buffer))!=-1){
message.write(buffer,0,len);
}
is.close();
message.close();
String msg = new String(message.toByteArray());
Log.d("Common",msg);
return msg;
}
return "fail";
}catch(Exception e){
return "error";
}
}
}

页面调用代码，注意和之前修改的名称一致。

private String url = "..."; ---接口地址
private void init(){ ---调用方法名
try {
String name = "abc";
String pwd = "123";
JSONObject jsonObject = new JSONObject();
jsonObject.put("name",name);
jsonObject.put("pwd",pwd);
String value = jsonObject.toString();
UpdateTextTask updateTextTask = new UpdateTextTask(this,url,value,text);
updateTextTask.execute();
}catch(Exception e){
text.setText("error");
}
}