android.widget.TimePicker#setSaveFromParentEnabled ( )源码实例Demo

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    if(!Sensor.isActive()) {
        setContentView(R.layout.activity_start_new_sensor);
        button = (Button)findViewById(R.id.startNewSensor);
        dp = (DatePicker)findViewById(R.id.datePicker);
        tp = (TimePicker)findViewById(R.id.timePicker);
        tp.setIs24HourView(DateFormat.is24HourFormat(this));
        tp.setSaveFromParentEnabled(false);
        tp.setSaveEnabled(true);
        addListenerOnButton();
        
        tp.setOnTimeChangedListener(new TimePicker.OnTimeChangedListener() {

            public void onTimeChanged(TimePicker arg0, int arg1, int arg2) {
                Log.d("NEW SENSOR", "new time " + arg1  + " " + arg2);

                if(arg1 == 23 && last_hour == 0) {
                    Log.d("NEW SENSOR", "decreading day");
                    addDays(-1);

                }
                if (arg1 == 0 && last_hour == 23) {
                    Log.d("NEW SENSOR", "increasing day");
                    addDays(1);
                }
                last_hour = arg1;

            }
        });

        last_hour = tp.getCurrentHour();
        
    } else {
        Intent intent = new Intent(this, StopSensor.class);
        startActivity(intent);
        finish();
    }
}
 

public TimeWidget(Context context, final FormEntryPrompt prompt) {
    super(context, prompt);

    mTimePicker = new TimePicker(getContext());
    mTimePicker.setFocusable(!prompt.isReadOnly());
    mTimePicker.setEnabled(!prompt.isReadOnly());
    mTimePicker.setOnTimeChangedListener(this);

    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB) {
        mTimePicker.setSaveFromParentEnabled(false);
        mTimePicker.setSaveEnabled(true);
    }

    String clockType =
            android.provider.Settings.System.getString(context.getContentResolver(),
                    android.provider.Settings.System.TIME_12_24);
    if (clockType == null || clockType.equalsIgnoreCase("24")) {
        mTimePicker.setIs24HourView(true);
    }

    // If there's an answer, use it.
    setAnswer();

    setGravity(Gravity.LEFT);
    addView(mTimePicker);

}
 

public DateTimeWidget(Context context, FormEntryPrompt prompt) {
    super(context, prompt);

    mDatePicker = new DatePicker(getContext());
    mDatePicker.setFocusable(!prompt.isReadOnly());
    mDatePicker.setEnabled(!prompt.isReadOnly());

    mTimePicker = new TimePicker(getContext());
    mTimePicker.setFocusable(!prompt.isReadOnly());
    mTimePicker.setEnabled(!prompt.isReadOnly());
    mTimePicker.setPadding(0, 20, 0, 0);
    mTimePicker.setOnTimeChangedListener(this);
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB) {
        mTimePicker.setSaveFromParentEnabled(false);
        mTimePicker.setSaveEnabled(true);
    }

    String clockType =
            android.provider.Settings.System.getString(context.getContentResolver(),
                    android.provider.Settings.System.TIME_12_24);
    if (clockType == null || clockType.equalsIgnoreCase("24")) {
        mTimePicker.setIs24HourView(true);
    }

    mDateListener = (view, year, month, day) -> {
        if (mPrompt.isReadOnly()) {
            setAnswer();
        } else {
            // handle leap years and number of days in month
            // TODO
            // http://code.google.com/p/android/issues/detail?id=2081
            Calendar c = Calendar.getInstance();
            c.set(year, month, 1);
            int max = c.getActualMaximum(Calendar.DAY_OF_MONTH);
            if (day > max) {
                //If the day has fallen out of spec, set it to the correct max
                mDatePicker.updateDate(year, month, max);
            } else {
                if (!(mDatePicker.getDayOfMonth() == day && mDatePicker.getMonth() == month && mDatePicker.getYear() == year)) {
                    //CTS: No reason to change the day if it's already correct?
                    mDatePicker.updateDate(year, month, day);
                }
            }
        }
        widgetEntryChanged();
    };

    // If there's an answer, use it.
    setAnswer();

    setGravity(Gravity.LEFT);
    addView(mDatePicker);
    addView(mTimePicker);

}