指定した日時までの時間を計算する小さなアプリがあります。それはうまくいきます。
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
import java.util.concurrent.TimeUnit;
import android.app.Activity;
import android.content.Intent;
import android.content.SharedPreferences;
import android.os.Bundle;
import android.os.Handler;
import android.util.Log;
import android.view.Menu;
import android.widget.DigitalClock;
import android.widget.TextView;
public class Day2GoActivity extends Activity {
private TextView tvWeeks, tvDays, tvHours, tvMinutes, tvSeconds, timeUntil;
public Date curDateTime = new Date();
public Calendar today = Calendar.getInstance();
public Calendar leaving = Calendar.getInstance();
protected SimpleDateFormat sdf = new SimpleDateFormat("E dd-MMM-yyyy HH:mm");
protected Handler h = new Handler();
protected Runnable r = new Runnable() {
public void run() {
afficher();
}
};
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
tvDays = (TextView) findViewById(R.id.tvDays);
timeUntil = (TextView) findViewById(R.id.timeUntil);
tvWeeks = (TextView) findViewById(R.id.tvWeeks);
tvHours = (TextView) findViewById(R.id.tvHours);
tvMinutes = (TextView) findViewById(R.id.tvMinutes);
tvSeconds = (TextView) findViewById(R.id.tvSeconds);
}
@Override
protected void onResume() {
super.onResume();
Log.i("TAG", "Resuming");
SharedPreferences sharedPreferences = getSharedPreferences("preferences", MODE_PRIVATE);
Log.i("MyActvity", "Year = " + sharedPreferences.getInt("year", Calendar.YEAR));
leaving.set(sharedPreferences.getInt("year", Calendar.YEAR), sharedPreferences.getInt("month", Calendar.MONTH),
sharedPreferences.getInt("dayOfMonth", Calendar.DAY_OF_MONTH), sharedPreferences.getInt("hour", Calendar.HOUR_OF_DAY),
sharedPreferences.getInt("minute", Calendar.MINUTE));
timeUntil.setText("Time until: " + sdf.format(leaving.getTime()));
r.run();
Log.w("TAG", "Resumed");
}
private void afficher() {
today = Calendar.getInstance();
long millisToGo = leaving.getTimeInMillis() - today.getTimeInMillis();
long seconds2go = TimeUnit.MILLISECONDS.toSeconds(millisToGo);
tvSeconds.setText(String.format("%,d seconds", seconds2go));
long minutes2go = TimeUnit.MILLISECONDS.toMinutes(millisToGo);
tvMinutes.setText(String.format("%,d minutes", minutes2go));
long hours2go = TimeUnit.MILLISECONDS.toHours(millisToGo);
tvHours.setText(String.format("%d hours", hours2go));
tvDays.setText(String.format("%d days %d hours", (int) hours2go / 24, hours2go % 24));
long days2go = TimeUnit.MILLISECONDS.toDays(millisToGo);
tvWeeks.setText(String.format("%d weeks %d days", (int) days2go / 7, days2go % 7));
h.postDelayed(r, 1000);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
Intent myIntent = new Intent(getApplicationContext(), editDate.class);
startActivity(myIntent);
return true;
}
しかし、ユーザーが日付と時刻を変更すると問題が発生します。Activityご覧のとおり、で呼び出される秒がありますonCreateOptionsMenu。それもうまくいきます。
import java.util.Calendar;
import android.app.Activity;
import android.content.SharedPreferences;
import android.os.Bundle;
import android.widget.DatePicker;
import android.widget.TimePicker;
public class editDate extends Activity {
protected DatePicker dp1;
protected TimePicker tp1;
protected Calendar c;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.edit);
dp1 = (DatePicker) findViewById(R.id.datePicker1);
tp1 = (TimePicker) findViewById(R.id.timePicker1);
tp1.setIs24HourView(true);
LoadPreferences();
}
@Override
protected void onDestroy() {
super.onDestroy();
SavePreferences();
}
private void SavePreferences() {
SharedPreferences sharedPreferences = this.getSharedPreferences("preferences", MODE_PRIVATE);
SharedPreferences.Editor editor = sharedPreferences.edit();
editor.putInt("year", dp1.getYear());
editor.putInt("month", dp1.getMonth());
editor.putInt("dayOfMonth", dp1.getDayOfMonth());
editor.putInt("hour", tp1.getCurrentHour());
editor.putInt("minute", tp1.getCurrentMinute());
editor.commit();
}
private void LoadPreferences() {
SharedPreferences sharedPreferences = this.getSharedPreferences("preferences", MODE_PRIVATE);
c = Calendar.getInstance();
try {
dp1.init(sharedPreferences.getInt("year", c.YEAR), sharedPreferences.getInt("month", c.MONTH),
sharedPreferences.getInt("dayOfMonth", c.DAY_OF_MONTH), null);
} catch (IllegalArgumentException e) {
// TODO Auto-generated catch block
dp1.init(2012, 5, 1, null);
}
tp1.setCurrentHour(sharedPreferences.getInt("hour", c.HOUR_OF_DAY));
tp1.setCurrentMinute(sharedPreferences.getInt("minute", c.MINUTE));
}
}
アプリは正常に実行され、Logcatファイルに予想されるすべてのエントリが含まれます。
06-01 18:21:04.049: I/ApplicationPackageManager(7750): cscCountry is not German : XEU
06-01 18:21:04.079: I/TAG(7750): Resuming
06-01 18:21:04.089: I/MyActvity(7750): Year = 2014
06-01 18:21:04.089: W/TAG(7750): Resumed
06-01 18:21:05.459: W/KeyCharacterMap(7750): No keyboard for id 0
06-01 18:21:05.459: W/KeyCharacterMap(7750): Using default keymap: /system/usr/keychars/qwerty.kcm.bin
06-01 18:21:05.519: I/ApplicationPackageManager(7750): cscCountry is not German : XEU
06-01 18:21:05.619: W/Picker(7750): beforeTextChanged: 01, 0, 2, 2
06-01 18:21:05.619: W/Picker(7750): onTextChanged: 01
06-01 18:21:05.619: W/Picker(7750): onTextChanged: 01, 0, 2, 2
06-01 18:21:05.619: W/Picker(7750): aftertextchanged: 01
06-01 18:21:05.619: W/Picker(7750): beforeTextChanged: 01, 0, 2, 2
06-01 18:21:05.619: W/Picker(7750): onTextChanged: 01
06-01 18:21:05.619: W/Picker(7750): onTextChanged: 10, 0, 2, 2
06-01 18:21:05.619: W/Picker(7750): aftertextchanged: 10
06-01 18:21:05.619: W/Picker(7750): beforeTextChanged: 2012, 0, 4, 4
06-01 18:21:05.619: W/Picker(7750): onTextChanged: 2012
06-01 18:21:05.619: W/Picker(7750): onTextChanged: 2014, 0, 4, 4
06-01 18:21:05.619: W/Picker(7750): aftertextchanged: 2014
06-01 18:21:08.239: E/DatePicker(7750): adjustMaxDat : 31 10
06-01 18:21:08.239: W/Picker(7750): beforeTextChanged: 10, 0, 2, 2
06-01 18:21:08.249: W/Picker(7750): onTextChanged: 10
06-01 18:21:08.249: W/Picker(7750): onTextChanged: 01, 0, 2, 2
06-01 18:21:08.249: W/Picker(7750): aftertextchanged: 01
06-01 18:21:08.259: W/Picker(7750): beforeTextChanged: 01, 0, 2, 2
06-01 18:21:08.259: W/Picker(7750): onTextChanged: 01
06-01 18:21:08.259: W/Picker(7750): onTextChanged: 10, 0, 2, 2
06-01 18:21:08.259: W/Picker(7750): aftertextchanged: 10
06-01 18:21:08.259: W/Picker(7750): beforeTextChanged: Jun, 0, 3, 3
06-01 18:21:08.259: W/Picker(7750): onTextChanged: Jun
06-01 18:21:08.259: W/Picker(7750): onTextChanged: Jul, 0, 3, 3
06-01 18:21:08.269: W/Picker(7750): aftertextchanged: Jul
06-01 18:21:10.759: I/TAG(7750): Resuming
06-01 18:21:10.759: I/MyActvity(7750): Year = 2014
06-01 18:21:10.759: W/TAG(7750): Resumed
ただし、は更新されませTextViewんtimeUntil()。私はここで何か間違ったことをしたと信じることができましたが、2つの問題がありました。まず、起動時（後）に実行timeUntil()されたときに更新され、次に、画面の向きを変更すると更新されます。画面の向きが再実行されることを理解しています。これは、それが後で機能していることを示唆していますが、単独で実行しているときは機能していません。私は完全に途方に暮れています。onResume()onCreate()timeUntil()onCreate()onResume()onCreate()
誰かアイデアはありますか？
Proxy32からの入力に続いて（以下を参照）、onResumevoidをに変更しました
@Override
protected void onResume() {
super.onResume();
timer.scheduleAtFixedRate(new TimerTask() {
public void run() {
h.post(new Runnable() {
@Override
public void run() {
Log.i("TAG", "Resuming");
SharedPreferences sharedPreferences = getSharedPreferences("preferences", MODE_PRIVATE);
Log.i("MyActvity", "Year = " + sharedPreferences.getInt("year", Calendar.YEAR));
leaving.set(sharedPreferences.getInt("year", Calendar.YEAR), sharedPreferences.getInt("month", Calendar.MONTH),
sharedPreferences.getInt("dayOfMonth", Calendar.DAY_OF_MONTH),
sharedPreferences.getInt("hour", Calendar.HOUR_OF_DAY), sharedPreferences.getInt("minute", Calendar.MINUTE));
Log.d("TAG", "date " + sdf.format(leaving.getTime()));
timeUntil.setText("Time until: " + sdf.format(leaving.getTime()));
timeUntil.invalidate();
today = Calendar.getInstance();
long millisToGo = leaving.getTimeInMillis() - today.getTimeInMillis();
long seconds2go = TimeUnit.MILLISECONDS.toSeconds(millisToGo);
tvSeconds.setText(String.format("%,d seconds", seconds2go));
long minutes2go = TimeUnit.MILLISECONDS.toMinutes(millisToGo);
tvMinutes.setText(String.format("%,d minutes", minutes2go));
long hours2go = TimeUnit.MILLISECONDS.toHours(millisToGo);
tvHours.setText(String.format("%,d hours", hours2go));
tvDays.setText(String.format("%,d days %d hours", (int) hours2go / 24, hours2go % 24));
long days2go = TimeUnit.MILLISECONDS.toDays(millisToGo);
tvWeeks.setText(String.format("%,d weeks %d days", (int) days2go / 7, days2go % 7));
}
});
}
}, 0, 1000);
Log.w("TAG", "Resumed");
}
私もafficherを削除しました。これで、私がやりたいことができます。問題が解決しました。