【Android】HorizontalNumberPicker

来源：互联网发布：先导爱知同人吧编辑：程序博客网时间：2024/05/18 15:57

好久没写了,发一个项目中用到的
支持单点,长按的加减器

效果如如下

这里写图片描述

定义如下

private final int NUMBER_MIN = 0;//最小值    private final int NUMBER_MAX = 100;//最大值    private FrameLayout mFrameLayoutReduce;//减号    private FrameLayout mFrameLayoutAdd;//加号    private ImageView ivReduce;//减号图标    private ImageView ivAdd;//加号图标    private TextView tvNumber;//中间的文字    private int number;//当前数字    private boolean isStop;//是否停止    private int longTime = 120;//长按的间隔    private Handler mHandler = new Handler() {        @Override        public void handleMessage(Message msg) {            super.handleMessage(msg);        }    };     private OnNumberChangeListener mOnNumberChangeListener;//监听器

初始化如下

public HorizontalNumberPicker(Context context) {        super(context);        initView();    } public HorizontalNumberPicker(Context context, AttributeSet attrs) {        super(context, attrs);        initView();    }/** * 这里之所以要使用FrameLayout包在ImageView外面是为了不改变ImageView大小的前提下增大触摸范围 */ private void initView() {        setGravity(Gravity.CENTER);        mFrameLayoutReduce = new FrameLayout(getContext());        mFrameLayoutAdd = new FrameLayout(getContext());        mFrameLayoutReduce.setOnClickListener(this);        mFrameLayoutReduce.setOnLongClickListener(this);        mFrameLayoutReduce.setOnTouchListener(this);        mFrameLayoutAdd.setOnClickListener(this);        mFrameLayoutAdd.setOnLongClickListener(this);        mFrameLayoutAdd.setOnTouchListener(this);        ivReduce = new ImageView(getContext());        ivAdd = new ImageView(getContext());        tvNumber = new TextView(getContext());        ivReduce.setScaleType(ImageView.ScaleType.CENTER_INSIDE);        ivReduce.setImageResource(R.mipmap.joinus_iv_reduce);        ivAdd.setScaleType(ImageView.ScaleType.CENTER_INSIDE);        ivAdd.setImageResource(R.mipmap.joinus_iv_add);        tvNumber.setGravity(Gravity.CENTER);        tvNumber.setTextColor(getResources().getColor(R.color.line_gray));        tvNumber.setTextSize(20);        tvNumber.setText("0");        int padding = DipPxUtil.dip2px(getContext(), 4);        tvNumber.setPadding(padding, 0, padding, 0);        LinearLayout.LayoutParams frameParams = new LinearLayout.LayoutParams(0, LayoutParams.MATCH_PARENT);        frameParams.weight = 1;        LayoutParams tvParams = new LayoutParams((int) tvNumber.getPaint().measureText(String.valueOf(NUMBER_MAX)) + 2 * padding, LayoutParams.MATCH_PARENT);//计算最大值需要多长的宽度        addView(mFrameLayoutReduce, frameParams);        addView(tvNumber, tvParams);        addView(mFrameLayoutAdd, frameParams);        FrameLayout.LayoutParams ivParamsReduce = new FrameLayout.LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);        ivParamsReduce.gravity = Gravity.CENTER_VERTICAL | Gravity.RIGHT;//往右        mFrameLayoutReduce.addView(ivReduce, ivParamsReduce);        FrameLayout.LayoutParams ivParamsAdd = new FrameLayout.LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);        ivParamsAdd.gravity = Gravity.CENTER_VERTICAL | Gravity.LEFT;//往左        mFrameLayoutAdd.addView(ivAdd, ivParamsAdd);    }

onMeasure

@Override    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {        int widthMode = MeasureSpec.getMode(widthMeasureSpec);        int heightMode = MeasureSpec.getMode(heightMeasureSpec);        int widthMeasure = widthMeasureSpec;        int heightMeasure = heightMeasureSpec;        int paddingLeft = getPaddingLeft();        int paddingTop = getPaddingTop();        int paddingRight = getPaddingRight();        int paddingBottom = getPaddingBottom();        if (widthMode != MeasureSpec.EXACTLY && heightMode != MeasureSpec.EXACTLY) {  //width,height均为wrap_content下的默认宽高            int width = DipPxUtil.dip2px(getContext(), 80) + paddingLeft + paddingRight;            int height = DipPxUtil.dip2px(getContext(), 30) + paddingTop + paddingBottom;            widthMeasure = MeasureSpec.makeMeasureSpec(width, MeasureSpec.EXACTLY);            heightMeasure = MeasureSpec.makeMeasureSpec(height, MeasureSpec.EXACTLY);        } else if (widthMode != MeasureSpec.EXACTLY) {            int width = DipPxUtil.dip2px(getContext(), 80) + paddingLeft + paddingRight;            widthMeasure = MeasureSpec.makeMeasureSpec(width, MeasureSpec.EXACTLY);        } else if (heightMode != MeasureSpec.EXACTLY) {            int height = DipPxUtil.dip2px(getContext(), 30) + paddingTop + paddingBottom;            heightMeasure = MeasureSpec.makeMeasureSpec(height, MeasureSpec.EXACTLY);        }        super.onMeasure(widthMeasure, heightMeasure);    }

处理

/** *处理单击 */    @Override    public void onClick(View v) {        if (v == mFrameLayoutAdd) {            number++;        } else if (v == mFrameLayoutReduce) {            number--;        }        setNumber(number);    }/** *处理长按,这里是按得越久速度越快 */    @Override    public boolean onLongClick(final View v) {        new Thread(new Runnable() {            @Override            public void run() {                while (!isStop) {                    mHandler.postDelayed(new Runnable() {                        @Override                        public void run() {                            if (v == mFrameLayoutAdd) {                                number++;                            } else if (v == mFrameLayoutReduce) {                                number--;                            }                            setNumber(number);                            longTime = longTime < 30 ? 30 : longTime - 8;                        }                    }, longTime);                    try {                        Thread.sleep(longTime);                    } catch (InterruptedException e) {                        e.printStackTrace();                    }                }            }        }).start();        return true;    }/** *处理长按后松开手机后,恢复速度 */    @Override    public boolean onTouch(View v, MotionEvent event) {        switch (event.getAction()) {            case MotionEvent.ACTION_DOWN:                isStop = false;                break;            case MotionEvent.ACTION_MOVE:                break;            case MotionEvent.ACTION_UP:                isStop = true;                longTime = 120;                break;        }        return false;    }/** *检查 */    private void CheckNumber() {        if (number < NUMBER_MIN) {            number = NUMBER_MIN;        } else if (number > NUMBER_MAX) {            number = NUMBER_MAX;        }    }    public int getNumber() {        return number;    }/** *设置数字 */    public void setNumber(int number) {        this.number = number;        CheckNumber();        tvNumber.setText(String.valueOf(this.number));        if (this.number == 0) {            tvNumber.setTextColor(getResources().getColor(R.color.line_gray));        } else {            tvNumber.setTextColor(getResources().getColor(R.color.joinus_main_text_gold));        }        if (mOnNumberChangeListener != null) {            mOnNumberChangeListener.onNumber(this, this.number);        }    }/** *数字变化的监听 */    public interface OnNumberChangeListener {        void onNumber(HorizontalNumberPicker numberPicker, int number);    }    public OnNumberChangeListener getOnNumberChangeListener() {        return mOnNumberChangeListener;    }    public void setOnNumberChangeListener(OnNumberChangeListener onNumberChangeListener) {        mOnNumberChangeListener = onNumberChangeListener;    }

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