Android(安卓)NumberPicker详细使用
16lz
2022-05-28
Android NumberPicker详细使用
1.普通使用
1.1.布局
1.2.Java代码
/** * Android NumberPicker * */ private void initNumberPicker() { NumberPicker numberPicker = findViewById(R.id.activity_main_testnumberpicker); //设置最大值 numberPicker.setMaxValue(150); //设置最小值 numberPicker.setMinValue(50); //设置当前值 numberPicker.setValue(105); //设置滑动监听 numberPicker.setOnValueChangedListener(new NumberPicker.OnValueChangeListener() { //当NunberPicker的值发生改变时，将会激发该方法 @Override public void onValueChange(NumberPicker picker, int oldVal, int newVal) { String toast = "oldVal：" + oldVal + " newVal：" + newVal; Toast.makeText(MainActivity.this, toast, Toast.LENGTH_SHORT).show(); } }); }1.3.效果
2.自定义NumberPicker(设置字体颜色，字体大小，分割线颜色)
2.1.自定义View
public class MyNumberPicker extends NumberPicker { /** * 构造方法 NumberPicker * */ public MyNumberPicker(Context context) { super(context); } public MyNumberPicker(Context context, AttributeSet attrs) { super(context, attrs); } public MyNumberPicker(Context context, AttributeSet attrs, int defStyleAttr) { super(context, attrs, defStyleAttr); } /** * addView方法 ViewGroup * */ @Override public void addView(View child) { super.addView(child); setNumberPickerView(child); } @Override public void addView(View child, int index) { super.addView(child, index); setNumberPickerView(child); } @Override public void addView(View child, int width, int height) { super.addView(child, width, height); setNumberPickerView(child); } @Override public void addView(View child, ViewGroup.LayoutParams params) { super.addView(child, params); setNumberPickerView(child); } @Override public void addView(View child, int index, ViewGroup.LayoutParams params) { super.addView(child, index, params); setNumberPickerView(child); } public void setNumberPickerView(View view) { if (view instanceof EditText) { ((EditText) view).setTextColor(ContextCompat.getColor(getContext(), R.color.colorPrimary)); //字体颜色 ((EditText) view).setTextSize(20f);//字体大小 } }}2.2.布局
2.3.Java代码
/** * Android NumberPicker * */ private void initNumberPicker() { MyNumberPicker numberPicker = findViewById(R.id.activity_main_testnumberpicker); //设置最大值 numberPicker.setMaxValue(150); //设置最小值 numberPicker.setMinValue(50); //设置当前值 numberPicker.setValue(105); //关闭编辑模式 numberPicker.setDescendantFocusability(NumberPicker.FOCUS_BLOCK_DESCENDANTS); //分割线颜色 setNumberPickerDividerColor(numberPicker); //设置滑动监听 numberPicker.setOnValueChangedListener(new NumberPicker.OnValueChangeListener() { //当NunberPicker的值发生改变时，将会激发该方法 @Override public void onValueChange(NumberPicker picker, int oldVal, int newVal) { String toast = "oldVal：" + oldVal + " newVal：" + newVal; Toast.makeText(MainActivity.this, toast, Toast.LENGTH_SHORT).show(); } }); } /** * 自定义滚动框分隔线颜色 */ private void setNumberPickerDividerColor(NumberPicker number) { Field[] pickerFields = NumberPicker.class.getDeclaredFields(); for (Field pf : pickerFields) { if (pf.getName().equals("mSelectionDivider")) { pf.setAccessible(true); try { //设置分割线的颜色值 pf.set(number, new ColorDrawable(ContextCompat.getColor(this, R.color.colorPrimary))); } catch (Exception e) { e.printStackTrace(); } break; } } }2.4.效果图
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