一直好好的，突然某个版本，TimePicker的字看不见了。

布局长这样

android:id="@+id/new_act_time_picker"

android:layout_width="wrap_content"

android:layout_height="wrap_content"/>

然后百度到如下代码：

private void set_timepicker_text_colour(TimePicker time_picker){

Resources system = Resources.getSystem();

int hour_numberpicker_id = system.getIdentifier("hour", "id", "android");

int minute_numberpicker_id = system.getIdentifier("minute", "id", "android");

int ampm_numberpicker_id = system.getIdentifier("amPm", "id", "android");

NumberPicker hour_numberpicker = (NumberPicker) time_picker.findViewById(hour_numberpicker_id);

NumberPicker minute_numberpicker = (NumberPicker) time_picker.findViewById(minute_numberpicker_id);

NumberPicker ampm_numberpicker = (NumberPicker) time_picker.findViewById(ampm_numberpicker_id);

set_numberpicker_text_colour(hour_numberpicker);

set_numberpicker_text_colour(minute_numberpicker);

set_numberpicker_text_colour(ampm_numberpicker);

}

private void set_numberpicker_text_colour(NumberPicker number_picker){

final int count = number_picker.getChildCount();

//这里就是要设置的颜色，修改一下作为参数传入会更好

final int color = getResources().getColor(R.color.color_5_5_5);

for(int i = 0; i < count; i++){

View child = number_picker.getChildAt(i);

try{

Field wheelpaint_field = number_picker.getClass().getDeclaredField("mSelectorWheelPaint");

wheelpaint_field.setAccessible(true);

((Paint)wheelpaint_field.get(number_picker)).setColor(color);

((EditText)child).setTextColor(color);

number_picker.invalidate();

}

catch(NoSuchFieldException e){

Log.w("setColor", e.toString());

}

catch(IllegalAccessException e){

Log.w("setColor", e.toString());

}

catch(IllegalArgumentException e){

Log.w("setColor", e.toString());

}

}

}

加入以后，奔溃，不知原因。

研究源码：

public TimePicker(Context context) {

this(context, null);

}

public TimePicker(Context context, AttributeSet attrs) {

this(context, attrs, R.attr.timePickerStyle);

}

public TimePicker(Context context, AttributeSet attrs, int defStyleAttr) {

this(context, attrs, defStyleAttr, 0);

}

public TimePicker(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) {

super(context, attrs, defStyleAttr, defStyleRes);

final TypedArray a = context.obtainStyledAttributes(

attrs, R.styleable.TimePicker, defStyleAttr, defStyleRes);

final int mode = a.getInt(R.styleable.TimePicker_timePickerMode, MODE_SPINNER);

a.recycle();

switch (mode) {

case MODE_CLOCK:

mDelegate = new TimePickerClockDelegate(

this, context, attrs, defStyleAttr, defStyleRes);

break;

case MODE_SPINNER:

default:

mDelegate = new TimePickerSpinnerDelegate(

this, context, attrs, defStyleAttr, defStyleRes);

break;

}

}怎么还有两个mode？我内心是奔溃的。

MODE_CLOCK 模式，是模拟手表盘，后加的模式。

MODE_SPINNER 经典模式，也是最早的模式。

突然解惑，为什么我的TimePicker在不同版本手机上长的不一样了。

简单修改一下布局：

android:id="@+id/new_act_time_picker"

android:timePickerMode="spinner"

android:layout_width="wrap_content"

android:layout_height="wrap_content"/>

为了照顾老版本，就用这种模式吧。

再套用上面的代码，字体颜色改掉。