我有一个TimePickerDialog,我想在按下按钮时向用户显示,以便她可以选择一个时间来设置显示(除了当前时间之外的某个时间)。当前按下按钮时,当前时间显示在TextView和Toast中。屏幕变暗,屏幕中央出现一个小方框。 TimePickerDialog不会显示给用户。
这是代码;
import java.util.Calendar;
import android.os.Bundle;
import android.app.Activity;
import android.app.Dialog;
import android.app.TimePickerDialog;
import android.content.Context;
import android.content.DialogInterface;
import android.support.v4.app.DialogFragment;
import android.support.v4.app.FragmentActivity;
import android.text.format.DateFormat;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;
import android.widget.TimePicker;
import android.widget.Toast;
public class AddAlarmActivity extends FragmentActivity implements TimePickerDialog.OnTimeSetListener, TimePickerDialog.OnDismissListener {
Button setTime;
public int hour_local;
public int minute_local;
public Dialog onCreateDialog;
public TimePicker timePicker;
public TextView displayAlarm;
static final int TIME_DIALOG_ID = 999;
@Override
public void onCreate(final Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_add_alarm);
//add a TextView thing to this part
setTime = (Button) findViewById(R.id.button_set_time);
displayAlarm = (TextView) findViewById(R.id.tvDisplayTime);
setTime.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
onCreateDialog(savedInstanceState);
showTimePickerDialog(timePicker);
displayAlarm.setText(hour_local + ":" + minute_local);
}
});
}
public Dialog onCreateDialog(Bundle savedInstanceState) {
// Use the current time as the default values for the picker
final Calendar c = Calendar.getInstance();
hour_local = c.get(Calendar.HOUR_OF_DAY);
minute_local = c.get(Calendar.MINUTE);
Context context = getApplicationContext();
CharSequence text = hour_local + ":" + minute_local;
int duration = Toast.LENGTH_LONG;
Toast toast = Toast.makeText(context, text, duration);
toast.show();
// Create a new instance of TimePickerDialog and return it
return new TimePickerDialog(getApplicationContext(), this, hour_local, minute_local,
DateFormat.is24HourFormat(getApplicationContext()));
}
public void showTimePickerDialog(View v) {
DialogFragment newFragment = new DialogFragment();
newFragment.show(getSupportFragmentManager(), "timePicker");
}
public void onDismiss(DialogInterface dialog){
System.out.println("oui c'est très bon !");
}
public void onTimeSet(TimePicker view, int hour_l, int minute_l) {
hour_local = hour_l;
minute_local = minute_l;
System.out.println("voila");
}
}
答案 0 :(得分:2)
我建议您遵循开发者网站的方式:
创建一个处理对话框片段的静态类
public static class TimePickerFragment extends DialogFragment
implements TimePickerDialog.OnTimeSetListener {
@Override
public Dialog onCreateDialog(Bundle savedInstanceState) {
// Use the current time as the default values for the picker
final Calendar c = Calendar.getInstance();
int hour = c.get(Calendar.HOUR_OF_DAY);
int minute = c.get(Calendar.MINUTE);
// Create a new instance of TimePickerDialog and return it
return new TimePickerDialog(getActivity(), this, hour, minute,
DateFormat.is24HourFormat(getActivity()));
}
public void onTimeSet(TimePicker view, int hourOfDay, int minute) {
// Do something with the time chosen by the user
}
}
在点击监听器上的按钮中调用此方法:
public void showTimePickerDialog(View v) {
DialogFragment newFragment = new TimePickerFragment();
newFragment.show(getSupportFragmentManager(), "timePicker");
}
来源here。
答案 1 :(得分:0)
public class AddAlarmActivity extends FragmentActivity {
Button setTime;
public static int hour_local;
public static int minute_local;
public Dialog onCreateDialog;
public TimePicker timePicker;
public static TextView displayAlarm;
public static int hour_alarm;
public static int minute_alarm;
@Override
public void onCreate(final Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_add_alarm);
setTime = (Button) findViewById(R.id.button_set_time);
displayAlarm = (TextView) findViewById(R.id.tvDisplayTime);
final Calendar c = Calendar.getInstance();
hour_local = c.get(Calendar.HOUR_OF_DAY);
minute_local = c.get(Calendar.MINUTE);
displayAlarm.setText(hour_local + ":" + minute_local);
setTime.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
showTimePickerDialog(timePicker);
}
});
}
public void onTimeSet(TimePicker view, int hour_l, int minute_l) {
// intentionally blank
}
public void showTimePickerDialog(View v) {
DialogFragment newFragment = new TimePickerFragment();
newFragment.show(getSupportFragmentManager(), "timePicker");
}
/*New static class*/
public static class TimePickerFragment extends DialogFragment implements TimePickerDialog.OnTimeSetListener {
public Dialog onCreateDialog(Bundle savedInstanceState) {
// Use the current time as the default values for the picker
final Calendar c = Calendar.getInstance();
hour_local = c.get(Calendar.HOUR_OF_DAY);
minute_local = c.get(Calendar.MINUTE);
Context context = getActivity();
CharSequence text = hour_local + ":" + minute_local;
int duration = Toast.LENGTH_LONG;
Toast toast = Toast.makeText(context, text, duration);
toast.show();
// Create a new instance of TimePickerDialog and return it
return new TimePickerDialog(getActivity(), this, hour_local, minute_local,
DateFormat.is24HourFormat(getActivity()));
}
public void onTimeSet(TimePicker view, int hour_l, int minute_l) {
hour_alarm = hour_l;
minute_alarm = minute_l;
displayAlarm.setText(hour_alarm + ":" + minute_alarm);
}
}
}
答案 2 :(得分:0)
TimePickerDialog dialog = new TimePickerDialog(this,OnTimeSet,DateTime.Now.Hour,DateTime.Now.Minute,true);
dialog.Show();
void OnTimeSet (object sender, TimePickerDialog.TimeSetEventArgs e)
{
}