我做了几个小时的研究和阅读这些事情，但我仍然无法弄清楚我的代码的问题： 我有一个带有按钮的视图和两个TextView。 单击该按钮，将调用一个过程，该过程将下载文件，对其进行分析并将计算结果打印到其中一个TextView。如果无限计算开始，则另一个只接受状态。 理论如此之多。 实际上几乎所有东西都可以工作，除了publishProgress应该将计算输出打印到TextView的部分。 （计算再次开始，但TextView中不显示任何文本。）
我希望有人可以帮助我解决这个问题。
这是我的代码：
package com.protonmail.fabian.schneider.aim;
import android.os.AsyncTask;
import android.util.Log;
import android.widget.Button;
import android.widget.TextView;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.TextView;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLConnection;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
public class AIM_start extends AppCompatActivity {
static String downURL = "http://services.swpc.noaa.gov/text/goes-magnetometer-primary.txt";
static String errPatt = "-1.00e+05";
public TextView status;
private Button startButton;
private Button stopButton;
public TextView output;
start_AIM calc = new start_AIM();
private boolean func = false;
public static String strengthArr[] = new String[4];
static {
strengthArr[0] = "90,110,90,110";
strengthArr[1] = "50,89,111,150";
strengthArr[2] = "0,49,151,200";
strengthArr[3] = "-50,-1,201,-250";
}
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_aim_start);
status = (TextView) findViewById(R.id.statusView);
output = (TextView) findViewById(R.id.lbl_output);
startButton = (Button) findViewById(R.id.start_aim);
startButton.setOnClickListener(new View.OnClickListener (){
public void onClick(View v) {
if (!func) {
func = true;
startButton.setText("Stop AIM");
status.setText("AIM-Started");
calc = new start_AIM();
calc.execute();
} else {
func = false;
startButton.setText("Start AIM");
calc.cancel(false);
status.setText("AIM-Stopped");
}
}
});
}
class start_AIM extends AsyncTask<String, String, String> {
public String doInBackground(String... params){
while (!this.isCancelled()) {
System.out.println("before publishProgress Update");
//publishProgress("Calculation Started");
dataImport dI;
try {
dI = new dataImport(downURL);
String calcData;
calcData = dI.download();
System.out.println(calcData);
preAnalysis pA;
pA = new preAnalysis(calcData);
boolean dateOk;
dateOk = pA.preanalyse();
if (dateOk) {
System.out.println("Data Date is okay");
//call last line downloader
dI = new dataImport(downURL);
String lastLine;
lastLine = dI.downloadLast();
if (!lastLine.contains(errPatt)) {
//data is ok
System.out.println("Current data is okay");
System.out.println("Current data: " + lastLine);
System.out.println("Starting analysis");
analyse an = new analyse(lastLine);
int strength;
strength = an.analyseData();
if (strength != -1) {
System.out.println("Strength: " + strength);
//outputText(Integer.toString(strength));
publishProgress(Integer.toString(strength));
//return Integer.toString(strength);
} else {
System.out.println("Strength not found");
//send signal for out of scope to output
publishProgress("-1");
//return "-1";
}
} else {
System.out.println("Current data is not okay");
publishProgress("Current data is not okay");
//send signal for satellite down to output
publishProgress("-1");
//return "-1";
}
} else {
System.out.println("Data Date not okay");
publishProgress("Data Date not okay");
//send signal for satellite down to output
publishProgress("-1");
//return "-1";
}
//catch statements
} catch (MalformedURLException e) {
System.out.println("MalformedUrlException for dI allocation");
} catch (IOException e) {
System.out.println("IOException in dI alloc");
//check inet conn/send satellite down to output
return "Connection expired";
}
//return "ERROR";
}
return null;
}
@Override protected void onProgressUpdate(String... values) {
super.onProgressUpdate(values);
}
protected void outputText(String result) {
output.setText(result);
}
protected void onPostExecute(String result) {
// execution of result of Long time consuming operation
Log.d("MyApp", "finished");
outputText(result);
}
protected void onPreExecute(String text) {
status.setText(text);
}
protected void onProgressUpdate(String text) {
super.onProgressUpdate(text);
Log.d("MyApp", "onProgressUpdate called");
status.setText(text);
}
final class dataImport {
private String downData = "";
private URL url = null;
private String lastLine = "";
dataImport(String url) throws MalformedURLException {
URL allocUrl = new URL(url);
this.url = allocUrl;
}
String download() throws IOException {
URLConnection con = url.openConnection();
InputStream ins = con.getInputStream();
BufferedReader br = new BufferedReader(new InputStreamReader(ins));
String line;
while ((line = br.readLine()) != null) {
downData += line;
lastLine = line;
}
return downData;
}
String downloadLast() throws IOException {
this.download();
return lastLine;
}
}
class preAnalysis{
private String data;
private String dataDate;
private String sDate;
private Calendar dateToCheck = Calendar.getInstance();
private Calendar timeToCheck = Calendar.getInstance();
preAnalysis(String data){
this.data = data;
}
boolean preanalyse(){
dataDate = this.getDataDate(data);
sDate = this.getDataTime(dataDate);
SimpleDateFormat formatter = new SimpleDateFormat("yyyy MMM dd HHmm");
//TODO make date convert right
try {
dateToCheck.setTime(formatter.parse(dataDate));
} catch (ParseException e) {
e.printStackTrace();
}
formatter = new SimpleDateFormat("HHmm");
try {
timeToCheck.setTime(formatter.parse(sDate));
} catch (ParseException e) {
e.printStackTrace();
}
//convert from UT
Calendar currentDate = Calendar.getInstance();
Calendar currentTime = Calendar.getInstance();
currentTime.add(Calendar.HOUR, -2);
currentTime.add(Calendar.MINUTE, -5);
//currentTime.set(Calendar.YEAR, Calendar.MONTH, Calendar.DAY_OF_MONTH,Calendar.HOUR -2, Calendar.MINUTE -5);
System.out.println("dateToCheck: " + dateToCheck + "; current Date: " + currentDate);
System.out.println("timeToCheck: " + timeToCheck + "; current Time: " + currentTime);
System.out.println("timeToCheck Time:" + timeToCheck.HOUR + ":" + timeToCheck.MINUTE);
System.out.println("time checked: " + currentTime.HOUR + ":" + currentTime.MINUTE);
if(dateToCheck.YEAR == currentDate.YEAR && dateToCheck.MONTH == currentDate.MONTH &&
dateToCheck.DAY_OF_MONTH == currentDate.DAY_OF_MONTH &&
timeToCheck.HOUR == currentTime.HOUR && timeToCheck.MINUTE == currentTime.MINUTE){ //&& !timeToCheck.before(currentTime.getTime())
return true;
} else {
return false;
}
}
private String getDataDate(final String data){
return data.substring(35,51);
}
private String getDataTime(final String dataDate){
return dataDate.substring(12);
}
}
final class analyse{
private String data;
private String[] splittedData = new String[4];
private Double[] splittedStrength = new Double[4];
analyse(String data){
this.data = data;
}
int analyseData(){
data = this.getCalcData();
this.splitCalcData();
String temp = splittedData[3];
double tempSplit = Double.parseDouble(temp);
int counter = 0;
for (String i : strengthArr){
this.splitStrength(i);
if ((tempSplit >= splittedStrength[0] &&
tempSplit <= splittedStrength[1]) ||
(tempSplit >= splittedStrength[2] &&
tempSplit <= splittedStrength[3])){
return counter;
}
counter += 1;
}
return -1;
}
private void splitStrength(String strength){
String[] temp;
temp = strength.split(",");
for(int b = 0; b < temp.length; b++){
splittedStrength[b] = Double.parseDouble(temp[b]);
}
}
private String getCalcData(){
return data.substring(37);
}
private void splitCalcData(){
splittedData[0] = data.substring(0,8);
splittedData[1] = data.substring(13,21);
splittedData[2] = data.substring(25,33);
splittedData[3] = data.substring(35);
}
}
abstract class dataOut{
void out(){
}
}
final class lblOut extends AppCompatActivity {
void outputToLbl(String value){
final TextView textViewToChange = (TextView) findViewById(R.id.textView);
textViewToChange.setText(value);
}
}
final class bluetoothOut extends dataOut{
void bluetoothOut(){
}
}
final class audioOut extends dataOut {
void audioOut() {
}
}
} //fin start aim
} //fin main
答案 0 :(得分：0)
您的onProgressUpdate
start_AIM extends AsyncTask
protected void onProgressUpdate(Integer... progress) {
doSomething(progress[0]);
}
文档在这里：
https://developer.android.com/reference/android/os/AsyncTask.html