Java 从BackgroundTask方法获取数组到另一个活动
我是Java/ADT的新手,我正在尝试获取一个从“活动A”到“活动B”的数组。该应用程序从网页中获取信息,然后将其保存在一对数组中并显示信息。我想单击“转到图形”按钮(调用viewallday())重定向到活动B,活动B将显示包含所有这些信息的图形 问题是它们是一个自刷新阵列(1秒刷新),当应用程序处于图形模式(活动B)时,它们不想失去此功能。有什么办法吗 提前感谢大家,我从这个网站学到了很多东西 更新:我正试图用单例模式来实现这一点。但LogCat说: 02-26 22:21:59.300:E/AndroidRuntime(2677):致命异常:主 02-26 22:21:59.300:E/AndroidRuntime(2677):java.lang.RuntimeException:无法启动活动组件信息{com.example.Chispa/com.example.Chispa.activity_allday}:android.os.NetworkOnMainThreadException 02-26 22:21:59.300:E/AndroidRuntime(2677):由以下原因引起:android.os.NetworkOnMainThreadException 更新2:终于找到了!!以下是我使用的代码: 以下是活动A的代码:Java 从BackgroundTask方法获取数组到另一个活动,java,android,arrays,android-activity,Java,Android,Arrays,Android Activity,我是Java/ADT的新手,我正在尝试获取一个从“活动A”到“活动B”的数组。该应用程序从网页中获取信息,然后将其保存在一对数组中并显示信息。我想单击“转到图形”按钮(调用viewallday())重定向到活动B,活动B将显示包含所有这些信息的图形 问题是它们是一个自刷新阵列(1秒刷新),当应用程序处于图形模式(活动B)时,它们不想失去此功能。有什么办法吗 提前感谢大家,我从这个网站学到了很多东西 更新:我正试图用单例模式来实现这一点。但LogCat说: 02-26 22:21:59.300:E
public class MainActivity extends Activity {
private TextView tvmax, tvmid, tvmin, tvactualval,tvvaloractual,tvdate;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
tvdate=(TextView)findViewById(R.id.tvdate);
tvvaloractual=(TextView)findViewById(R.id.tvvaloractual);
tvmax=(TextView)findViewById(R.id.tvmaximo);
tvmid=(TextView)findViewById(R.id.tvmedio);
tvmin=(TextView)findViewById(R.id.tvminimo);
new BackGroundTask().execute();
callAsynchronousTask();
}
public void callAsynchronousTask() {
final Handler handler = new Handler();
Timer timer = new Timer();
TimerTask doAsynchronousTask = new TimerTask() {
@Override
public void run() {
handler.post(new Runnable() {
public void run() {
try {
BackGroundTask performBackgroundTask = new BackGroundTask();
// PerformBackgroundTask this class is the class that extends AsynchTask
performBackgroundTask.execute();
} catch (Exception e) {
// TODO Auto-generated catch block
}
}
});
}
};
timer.schedule(doAsynchronousTask, 0, 1000); //execute in every 1000 ms
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
public class Pair
{
public String[] bar;
public String[] values;
}
public void viewallday(View view) {
Intent intent = new Intent(MainActivity.this, Activity_allday.class);
startActivity(intent);
}
class BackGroundTask extends AsyncTask<Void, Void, Pair> {
@Override
protected void onPreExecute() {
super.onPreExecute();
}
public String[] getValuesGraph(Document doc) {
int cont=24,var=7;
String bar[] = new String[cont];
/*
* Getting elements from the graphic in an array from 0-23. 0 it's 1:00am, 23 it's 00:00am
*/
for (cont=0; cont < 24; cont++){
String onMouseOver = doc.select("a").get(var+cont).attr("onMouseOver");
bar[cont] = onMouseOver.split("'")[9];
}
return bar;
}
public String[] getValuesFooter(Document doc) {
String values[] = new String[7];
/*
* Getting elements from the graphic footer
*/
String delimiters= "[ /]+";
Elements elements = doc.select("td.cabeceraRutaTexto");
elements.size(); // 6
/* Getting text from table */
values[0] = elements.get(0).text(); // TITLE
values[1] = elements.get(1).text(); // TEXT MAX VALUE
values[2] = elements.get(2).text(); // TEXT MIDDLE VALUE
values[3] = elements.get(3).text(); // TEXTO MIN VALUE
/* Getting numbers from table */
values[4] = elements.get(4).text().split(delimiters)[0]; // NUMBER MAX VALUE
values[5] = elements.get(5).text().split(delimiters)[0]; // NUMBER MIDDLE VALUE
values[6] = elements.get(6).text().split(delimiters)[0]; // NUMBER MIN VALUE
return values;
}
public Document getUrl(){
try {
URL url= new URL("http://www.endesaonline.com/canal/precios/Canal_Preciosdelpool.asp?FECHA=20140226");
/*URL url= new URL("http://www.endesaonline.com/canal/precios/Canal_Preciosdelpool.asp?lang=es&frameId=4064&segmento=1&promocion=");*/
Document doc = Jsoup.connect(url.toString()).get();
return doc;
} catch (IOException e) {
e.printStackTrace();
}
return null;
}
@Override
public Pair doInBackground(Void... params) {
Pair p = new Pair();
GlobalVariables gs = (GlobalVariables) getApplication();
gs.setBar(getValuesGraph(getUrl()));
p.bar = getValuesGraph(getUrl());
p.values = getValuesFooter(getUrl());
return p;
}
public String ActualHourValue() {
Format formatter = new SimpleDateFormat("H");
String onlyhour = formatter.format(new Date());
return onlyhour;
}
public void ShowDateHour(){
Calendar c = Calendar.getInstance();
SimpleDateFormat df3 = new SimpleDateFormat("dd-MM-yyyy HH:mm:ss a");
String formattedDate3 = df3.format(c.getTime());
tvdate.setText("Fecha y hora actuales : "+formattedDate3);
}
@Override
protected void onPostExecute(Pair p) {
int hour = Integer.parseInt(ActualHourValue());
tvvaloractual.setText(p.bar[hour]+" €/MWh");
tvmax.setText(p.values[4]+" €/MWh");
tvmid.setText(p.values[5]+" €/MWh");
tvmin.setText(p.values[6]+" €/MWh");
ShowDateHour();
/*super.onPostExecute(p.values);*/
}
}
}
public class MainActivity extends Activity {
private TextView tvmax, tvmid, tvmin, tvactualval,tvvaloractual,tvdate;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
tvdate=(TextView)findViewById(R.id.tvdate);
tvvaloractual=(TextView)findViewById(R.id.tvvaloractual);
tvmax=(TextView)findViewById(R.id.tvmaximo);
tvmid=(TextView)findViewById(R.id.tvmedio);
tvmin=(TextView)findViewById(R.id.tvminimo);
new BackGroundTask().execute();
callAsynchronousTask();
}
public void callAsynchronousTask() {
final Handler handler = new Handler();
Timer timer = new Timer();
TimerTask doAsynchronousTask = new TimerTask() {
@Override
public void run() {
handler.post(new Runnable() {
public void run() {
try {
BackGroundTask performBackgroundTask = new BackGroundTask();
// PerformBackgroundTask this class is the class that extends AsynchTask
performBackgroundTask.execute();
} catch (Exception e) {
// TODO Auto-generated catch block
}
}
});
}
};
timer.schedule(doAsynchronousTask, 0, 1000); //execute in every 1000 ms
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
public class Pair
{
public String[] bar;
public String[] values;
}
public void viewallday(View view) {
Intent intent = new Intent(MainActivity.this, Activity_allday.class);
startActivity(intent);
}
class BackGroundTask extends AsyncTask<Void, Void, Pair> {
@Override
protected void onPreExecute() {
super.onPreExecute();
}
public String[] getValuesGraph(Document doc) {
int cont=24,var=7;
String bar[] = new String[cont];
/*
* Getting elements from the graphic in an array from 0-23. 0 it's 1:00am, 23 it's 00:00am
*/
for (cont=0; cont < 24; cont++){
String onMouseOver = doc.select("a").get(var+cont).attr("onMouseOver");
bar[cont] = onMouseOver.split("'")[9];
}
return bar;
}
public String[] getValuesFooter(Document doc) {
String values[] = new String[7];
/*
* Getting elements from the graphic footer
*/
String delimiters= "[ /]+";
Elements elements = doc.select("td.cabeceraRutaTexto");
elements.size(); // 6
/* Getting text from table */
values[0] = elements.get(0).text(); // TITLE
values[1] = elements.get(1).text(); // TEXT MAX VALUE
values[2] = elements.get(2).text(); // TEXT MIDDLE VALUE
values[3] = elements.get(3).text(); // TEXTO MIN VALUE
/* Getting numbers from table */
values[4] = elements.get(4).text().split(delimiters)[0]; // NUMBER MAX VALUE
values[5] = elements.get(5).text().split(delimiters)[0]; // NUMBER MIDDLE VALUE
values[6] = elements.get(6).text().split(delimiters)[0]; // NUMBER MIN VALUE
return values;
}
public Document getUrl(){
try {
URL url= new URL("http://www.endesaonline.com/canal/precios/Canal_Preciosdelpool.asp?FECHA=20140226");
/*URL url= new URL("http://www.endesaonline.com/canal/precios/Canal_Preciosdelpool.asp?lang=es&frameId=4064&segmento=1&promocion=");*/
Document doc = Jsoup.connect(url.toString()).get();
return doc;
} catch (IOException e) {
e.printStackTrace();
}
return null;
}
@Override
public Pair doInBackground(Void... params) {
Pair p = new Pair();
GlobalVariables gs = (GlobalVariables) getApplication();
gs.setBar(getValuesGraph(getUrl()));
p.bar = getValuesGraph(getUrl());
p.values = getValuesFooter(getUrl());
return p;
}
public String ActualHourValue() {
Format formatter = new SimpleDateFormat("H");
String onlyhour = formatter.format(new Date());
return onlyhour;
}
public void ShowDateHour(){
Calendar c = Calendar.getInstance();
SimpleDateFormat df3 = new SimpleDateFormat("dd-MM-yyyy HH:mm:ss a");
String formattedDate3 = df3.format(c.getTime());
tvdate.setText("Fecha y hora actuales : "+formattedDate3);
}
@Override
protected void onPostExecute(Pair p) {
int hour = Integer.parseInt(ActualHourValue());
tvvaloractual.setText(p.bar[hour]+" €/MWh");
tvmax.setText(p.values[4]+" €/MWh");
tvmid.setText(p.values[5]+" €/MWh");
tvmin.setText(p.values[6]+" €/MWh");
ShowDateHour();
/*super.onPostExecute(p.values);*/
}
}
}
}
下面是一个GlobalVariable类,它捕获了我要发送给活动B的数组:
public class Activity_allday extends MainActivity {
private TextView tvall;
@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.all_day_price);
TextView tvall=(TextView)findViewById(R.id.tvall);
GlobalVariables gs = (GlobalVariables) getApplication();
String[] s = gs.getBar();
tvall.setText(s[0]);
}
public class Activity_allday extends MainActivity {
private TextView tvall;
@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.all_day_price);
TextView tvall=(TextView)findViewById(R.id.tvall);
GlobalVariables gs = (GlobalVariables) getApplication();
String[] s = gs.getBar();
tvall.setText(s[0]);
}
public class Activity_allday extends MainActivity {
private TextView tvall;
@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.all_day_price);
TextView tvall=(TextView)findViewById(R.id.tvall);
GlobalVariables gs = (GlobalVariables) getApplication();
String[] s = gs.getBar();
tvall.setText(s[0]);
}
public class Activity_allday extends MainActivity {
private TextView tvall;
@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.all_day_price);
TextView tvall=(TextView)findViewById(R.id.tvall);
GlobalVariables gs = (GlobalVariables) getApplication();
String[] s = gs.getBar();
tvall.setText(s[0]);
}
}
}
就这些!希望对未来的用户有所帮助
谢谢大家的帮助。以下是您可以尝试的: 在AsyncTask内部,定义一个接口和一个方法,该接口和方法将数据传回调用活动,在该方法内部,调用下一个活动并将数据设置为额外数据 这是最简单的方法 在AsyncTask的onPostExecute(result)内部,使用try块调用属于上述接口的方法,该接口必须由调用活动实现 HomeActivity.java
/public class SampleActivity extends Activity implements SampleAsyncTask.OnUpdateListener{
@Override
public void onCreate(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
executeAsync();
}
public void executeAsync(){
new SampleAsyncTask(this).execute("someFlagToCheck");
}
@Override
public void onDataProcessed(String result){
Intent intent = new Intent(this, SecondActivity.class);
intent.putExtra("data", result);
startActivity(intent);
}
}
public class SampleAsyncTask extends AsyncTask<Void, Void, String>{
Context context;
//constructor
SampleAsyncTask(Context context){
this.context = context;
}
@Override
public void doInBackground(String... params){
//do something depending on the arguments in params
return "data";
}
@Override
public void onPostExecute(String result){
try{
((OnUpdateListener) context).onDataProcessed(result);
}catch(Exception e){
e.printStackTrace();
}
}
public interface OnUpdateListener{
public void onDataProcessed(String data);
}
}
SampleAsyncTask.java
/public class SampleActivity extends Activity implements SampleAsyncTask.OnUpdateListener{
@Override
public void onCreate(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
executeAsync();
}
public void executeAsync(){
new SampleAsyncTask(this).execute("someFlagToCheck");
}
@Override
public void onDataProcessed(String result){
Intent intent = new Intent(this, SecondActivity.class);
intent.putExtra("data", result);
startActivity(intent);
}
}
public class SampleAsyncTask extends AsyncTask<Void, Void, String>{
Context context;
//constructor
SampleAsyncTask(Context context){
this.context = context;
}
@Override
public void doInBackground(String... params){
//do something depending on the arguments in params
return "data";
}
@Override
public void onPostExecute(String result){
try{
((OnUpdateListener) context).onDataProcessed(result);
}catch(Exception e){
e.printStackTrace();
}
}
public interface OnUpdateListener{
public void onDataProcessed(String data);
}
}
公共类SampleAsyncTask扩展异步任务{
语境;
//建造师
SamPleaseSyncTask(上下文){
this.context=上下文;
}
@凌驾
公共void doInBackground(字符串…参数){
//根据params中的参数执行某些操作
返回“数据”;
}
@凌驾
public void onPostExecute(字符串结果){
试一试{
((OnUpdateListener)上下文);
}捕获(例外e){
e、 printStackTrace();
}
}
公共接口OnUpdateListener{
已处理的公共数据(字符串数据);
}
}
遵循这个例子。调用活动实现AsyncTask的接口并重写其方法,该方法将在async任务完成并返回结果时调用
我希望这有帮助。解决方案:
以下是活动A的代码:
public class MainActivity extends Activity {
private TextView tvmax, tvmid, tvmin, tvactualval,tvvaloractual,tvdate;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
tvdate=(TextView)findViewById(R.id.tvdate);
tvvaloractual=(TextView)findViewById(R.id.tvvaloractual);
tvmax=(TextView)findViewById(R.id.tvmaximo);
tvmid=(TextView)findViewById(R.id.tvmedio);
tvmin=(TextView)findViewById(R.id.tvminimo);
new BackGroundTask().execute();
callAsynchronousTask();
}
public void callAsynchronousTask() {
final Handler handler = new Handler();
Timer timer = new Timer();
TimerTask doAsynchronousTask = new TimerTask() {
@Override
public void run() {
handler.post(new Runnable() {
public void run() {
try {
BackGroundTask performBackgroundTask = new BackGroundTask();
// PerformBackgroundTask this class is the class that extends AsynchTask
performBackgroundTask.execute();
} catch (Exception e) {
// TODO Auto-generated catch block
}
}
});
}
};
timer.schedule(doAsynchronousTask, 0, 1000); //execute in every 1000 ms
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
public class Pair
{
public String[] bar;
public String[] values;
}
public void viewallday(View view) {
Intent intent = new Intent(MainActivity.this, Activity_allday.class);
startActivity(intent);
}
class BackGroundTask extends AsyncTask<Void, Void, Pair> {
@Override
protected void onPreExecute() {
super.onPreExecute();
}
public String[] getValuesGraph(Document doc) {
int cont=24,var=7;
String bar[] = new String[cont];
/*
* Getting elements from the graphic in an array from 0-23. 0 it's 1:00am, 23 it's 00:00am
*/
for (cont=0; cont < 24; cont++){
String onMouseOver = doc.select("a").get(var+cont).attr("onMouseOver");
bar[cont] = onMouseOver.split("'")[9];
}
return bar;
}
public String[] getValuesFooter(Document doc) {
String values[] = new String[7];
/*
* Getting elements from the graphic footer
*/
String delimiters= "[ /]+";
Elements elements = doc.select("td.cabeceraRutaTexto");
elements.size(); // 6
/* Getting text from table */
values[0] = elements.get(0).text(); // TITLE
values[1] = elements.get(1).text(); // TEXT MAX VALUE
values[2] = elements.get(2).text(); // TEXT MIDDLE VALUE
values[3] = elements.get(3).text(); // TEXTO MIN VALUE
/* Getting numbers from table */
values[4] = elements.get(4).text().split(delimiters)[0]; // NUMBER MAX VALUE
values[5] = elements.get(5).text().split(delimiters)[0]; // NUMBER MIDDLE VALUE
values[6] = elements.get(6).text().split(delimiters)[0]; // NUMBER MIN VALUE
return values;
}
public Document getUrl(){
try {
URL url= new URL("http://www.endesaonline.com/canal/precios/Canal_Preciosdelpool.asp?FECHA=20140226");
/*URL url= new URL("http://www.endesaonline.com/canal/precios/Canal_Preciosdelpool.asp?lang=es&frameId=4064&segmento=1&promocion=");*/
Document doc = Jsoup.connect(url.toString()).get();
return doc;
} catch (IOException e) {
e.printStackTrace();
}
return null;
}
@Override
public Pair doInBackground(Void... params) {
Pair p = new Pair();
GlobalVariables gs = (GlobalVariables) getApplication();
gs.setBar(getValuesGraph(getUrl()));
p.bar = getValuesGraph(getUrl());
p.values = getValuesFooter(getUrl());
return p;
}
public String ActualHourValue() {
Format formatter = new SimpleDateFormat("H");
String onlyhour = formatter.format(new Date());
return onlyhour;
}
public void ShowDateHour(){
Calendar c = Calendar.getInstance();
SimpleDateFormat df3 = new SimpleDateFormat("dd-MM-yyyy HH:mm:ss a");
String formattedDate3 = df3.format(c.getTime());
tvdate.setText("Fecha y hora actuales : "+formattedDate3);
}
@Override
protected void onPostExecute(Pair p) {
int hour = Integer.parseInt(ActualHourValue());
tvvaloractual.setText(p.bar[hour]+" €/MWh");
tvmax.setText(p.values[4]+" €/MWh");
tvmid.setText(p.values[5]+" €/MWh");
tvmin.setText(p.values[6]+" €/MWh");
ShowDateHour();
/*super.onPostExecute(p.values);*/
}
}
}
public class MainActivity extends Activity {
private TextView tvmax, tvmid, tvmin, tvactualval,tvvaloractual,tvdate;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
tvdate=(TextView)findViewById(R.id.tvdate);
tvvaloractual=(TextView)findViewById(R.id.tvvaloractual);
tvmax=(TextView)findViewById(R.id.tvmaximo);
tvmid=(TextView)findViewById(R.id.tvmedio);
tvmin=(TextView)findViewById(R.id.tvminimo);
new BackGroundTask().execute();
callAsynchronousTask();
}
public void callAsynchronousTask() {
final Handler handler = new Handler();
Timer timer = new Timer();
TimerTask doAsynchronousTask = new TimerTask() {
@Override
public void run() {
handler.post(new Runnable() {
public void run() {
try {
BackGroundTask performBackgroundTask = new BackGroundTask();
// PerformBackgroundTask this class is the class that extends AsynchTask
performBackgroundTask.execute();
} catch (Exception e) {
// TODO Auto-generated catch block
}
}
});
}
};
timer.schedule(doAsynchronousTask, 0, 1000); //execute in every 1000 ms
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
public class Pair
{
public String[] bar;
public String[] values;
}
public void viewallday(View view) {
Intent intent = new Intent(MainActivity.this, Activity_allday.class);
startActivity(intent);
}
class BackGroundTask extends AsyncTask<Void, Void, Pair> {
@Override
protected void onPreExecute() {
super.onPreExecute();
}
public String[] getValuesGraph(Document doc) {
int cont=24,var=7;
String bar[] = new String[cont];
/*
* Getting elements from the graphic in an array from 0-23. 0 it's 1:00am, 23 it's 00:00am
*/
for (cont=0; cont < 24; cont++){
String onMouseOver = doc.select("a").get(var+cont).attr("onMouseOver");
bar[cont] = onMouseOver.split("'")[9];
}
return bar;
}
public String[] getValuesFooter(Document doc) {
String values[] = new String[7];
/*
* Getting elements from the graphic footer
*/
String delimiters= "[ /]+";
Elements elements = doc.select("td.cabeceraRutaTexto");
elements.size(); // 6
/* Getting text from table */
values[0] = elements.get(0).text(); // TITLE
values[1] = elements.get(1).text(); // TEXT MAX VALUE
values[2] = elements.get(2).text(); // TEXT MIDDLE VALUE
values[3] = elements.get(3).text(); // TEXTO MIN VALUE
/* Getting numbers from table */
values[4] = elements.get(4).text().split(delimiters)[0]; // NUMBER MAX VALUE
values[5] = elements.get(5).text().split(delimiters)[0]; // NUMBER MIDDLE VALUE
values[6] = elements.get(6).text().split(delimiters)[0]; // NUMBER MIN VALUE
return values;
}
public Document getUrl(){
try {
URL url= new URL("http://www.endesaonline.com/canal/precios/Canal_Preciosdelpool.asp?FECHA=20140226");
/*URL url= new URL("http://www.endesaonline.com/canal/precios/Canal_Preciosdelpool.asp?lang=es&frameId=4064&segmento=1&promocion=");*/
Document doc = Jsoup.connect(url.toString()).get();
return doc;
} catch (IOException e) {
e.printStackTrace();
}
return null;
}
@Override
public Pair doInBackground(Void... params) {
Pair p = new Pair();
GlobalVariables gs = (GlobalVariables) getApplication();
gs.setBar(getValuesGraph(getUrl()));
p.bar = getValuesGraph(getUrl());
p.values = getValuesFooter(getUrl());
return p;
}
public String ActualHourValue() {
Format formatter = new SimpleDateFormat("H");
String onlyhour = formatter.format(new Date());
return onlyhour;
}
public void ShowDateHour(){
Calendar c = Calendar.getInstance();
SimpleDateFormat df3 = new SimpleDateFormat("dd-MM-yyyy HH:mm:ss a");
String formattedDate3 = df3.format(c.getTime());
tvdate.setText("Fecha y hora actuales : "+formattedDate3);
}
@Override
protected void onPostExecute(Pair p) {
int hour = Integer.parseInt(ActualHourValue());
tvvaloractual.setText(p.bar[hour]+" €/MWh");
tvmax.setText(p.values[4]+" €/MWh");
tvmid.setText(p.values[5]+" €/MWh");
tvmin.setText(p.values[6]+" €/MWh");
ShowDateHour();
/*super.onPostExecute(p.values);*/
}
}
}
}
捕获要发送到活动B的数组的全局变量类:
public class Activity_allday extends MainActivity {
private TextView tvall;
@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.all_day_price);
TextView tvall=(TextView)findViewById(R.id.tvall);
GlobalVariables gs = (GlobalVariables) getApplication();
String[] s = gs.getBar();
tvall.setText(s[0]);
}
public class Activity_allday extends MainActivity {
private TextView tvall;
@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.all_day_price);
TextView tvall=(TextView)findViewById(R.id.tvall);
GlobalVariables gs = (GlobalVariables) getApplication();
String[] s = gs.getBar();
tvall.setText(s[0]);
}
public class Activity_allday extends MainActivity {
private TextView tvall;
@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.all_day_price);
TextView tvall=(TextView)findViewById(R.id.tvall);
GlobalVariables gs = (GlobalVariables) getApplication();
String[] s = gs.getBar();
tvall.setText(s[0]);
}
public class Activity_allday extends MainActivity {
private TextView tvall;
@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.all_day_price);
TextView tvall=(TextView)findViewById(R.id.tvall);
GlobalVariables gs = (GlobalVariables) getApplication();
String[] s = gs.getBar();
tvall.setText(s[0]);
}
}
谢谢大家的帮助 你有没有试过让一个服务将数据保存到某个共享的地方(例如应用程序singleton)?没有,我会在Google上看看singleton和他的应用程序。非常感谢@StephanYou也可以使用包裹。有关更多信息,请参阅。@Stephan我终于尝试使用singleton了。对活动B的调用工作正常,但当我尝试获取数组时,程序因上述错误而崩溃。有什么想法吗?谢谢。@user3321425,对不起,我休息了几天。我看你还是成功了。您能否将您的解决方案作为答案发布,以便其他人可以从中受益?谢谢@Eenvincible。我将仔细阅读你的建议,试图复制它。我正在为这个问题而斗争,现在我所能做的就是对startActivity的一系列呼叫PIt工作正常,但也会导致循环,因为如果我将活动调用放在onPostExecute()中,它正在调用的方法就是startActivity(intent)@再次感谢。你好,很遗憾你的回答还不能解决我的问题。正如我在上一篇评论中所解释的,我有一个带有startActivity(intent)的循环,因为BackGroundTask和他的方法OnPostExecute()每秒刷新一次。@Eenvincible如果你能给我一个示例代码,那将非常有帮助。非常感谢。谢谢,我正试着在我的代码中加入你的行。但Asynctask、callAsynchronousTask、BackGroundTask和OnUpdateListener的公共接口(必须在顶级类上定义它的某些内容)都有问题。我明天去看看,现在我必须休息了。谢谢你@eenvicible!!不幸的是,我无法使代码正常工作,我将继续尝试。也许我挑选VAR的方式不是让他们整天参加活动的最佳方式。