1.png
这是文字模式下
2.png
这是密码模式1
3.png
这是密码模式2
4.png
输入位数可调节
5.png
因为要保持正方形 所以 高度即为item的宽度 默认居中.
当高度达到一定程度 固定数量下的item大小不再变化
具体可自己修改
样式参考了这位兄弟 https://blog.csdn.net/qq_33553515/article/details/73344155
逻辑参考了这个兄弟 https://www.jb51.net/article/136258.htm
<com.xxx.xxx.xxx.InputMessageCodeView
android:layout_width="match_parent"
android:layout_height="50dp"
android:layout_marginTop="20dp"
android:background="@null"
app:isOval="false"
app:isPassword="false"
app:itemNumber="6"
app:layout_constraintTop_toTopOf="parent"/>
import android.content.Context;
import android.content.res.TypedArray;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.RectF;
import android.support.v7.widget.AppCompatEditText;
import android.text.InputFilter;
import android.text.InputType;
import android.util.AttributeSet;
import android.util.TypedValue;
import com.jack.mysnake_demo.R;
/**
* Class for: 输入验证码的view
* Created by jack.马
* Date: 2018/9/10
* Time: 16:03
*/
public class InputMessageCodeView extends AppCompatEditText {
private Paint mPaintBg;//画圆角矩形的背景
private Paint mPaintStroke;//画圆角矩形的边框
private Paint mPaintText;//画字 非密码框的时候
private int mItemWidth = 0;//每个item的宽度
private int mInterval = dp2px(5);//每个item的间隔大小 px
private int mStrokeSize = dp2px(1); //边框大小 也是上下边距 px
private int mitemSize = 6;//字数的个数
private boolean mIsPassWordMode = false;//是否是密码模式 是 则使用圆点
private int mPasswordRadius = dp2px(8); //密码的半径 px
private boolean mIsOvalMode = false;//是否使用圆点 默认为使用*字符 只有密码模式下有效
private int mBaseLineY = 0;//文字的y下笔点
private float mBeginX = 0;//开始画的坐标x
private int mBeginY = 0;//开始画的坐标y
//颜色
private int mBgColor = Color.parseColor("#FFF0EAEC");
private int mUnSelectColor = Color.parseColor("#FFC3C1C2");
private int mSelectColor = Color.parseColor("#FF65A1DD");
private int mTextColor = Color.parseColor("#FF413F40");
public InputMessageCodeView(Context context) {
this(context, null);
}
public InputMessageCodeView(Context context, AttributeSet attrs) {
super(context, attrs);
setMinHeight(dp2px(35)); //最小35dp
setInputType(InputType.TYPE_CLASS_NUMBER);//默认只能输入数字
initAttr(context, attrs);
initPaint();
setFilters(new InputFilter[]{new InputFilter.LengthFilter(mitemSize)});
// 不显示光标
setCursorVisible(false);
}
@Override
protected void onDraw(Canvas canvas) {
mItemWidth = getHeight() - mStrokeSize * 2; //宽度等于高度减去上下边距
if (mItemWidth * mitemSize > getWidth()) {//当item个数*宽度 ,大于view的宽度的时候 重新设置item宽度保证完整显示
mItemWidth = getWidth() / mitemSize - mInterval * 3;
}
float a = mItemWidth * mitemSize; //每一个输入框的宽度
float b = mInterval * (mitemSize + 1); //所有框的间距和 数量+1
float abw = getWidth() - (a + b); //剩余可用宽度
mBeginX = abw / 2 + mInterval;//开始画的位置,加上第一个间距
mBeginY = getHeight() / 2 - mItemWidth / 2;
// 绘制背景矩形 和边框
drawOutBg(canvas);
// // 绘制输入时的变化
drawInput(canvas);
}
/**
* 初始化属性
*/
private void initAttr(Context context, AttributeSet attrs) {
TypedArray array = context.obtainStyledAttributes(attrs, R.styleable.input_message_View);
mitemSize = array.getInt(R.styleable.input_message_View_itemNumber, 6);//默认可输入6个
mIsPassWordMode = array.getBoolean(R.styleable.input_message_View_isPassword, false); //是否密码模式
mIsOvalMode = array.getBoolean(R.styleable.input_message_View_isOval, false);
//颜色设置
mUnSelectColor = array.getColor(R.styleable.input_message_View_unSelectStrokeColor, mUnSelectColor);//未输入颜色
mSelectColor = array.getColor(R.styleable.input_message_View_unSelectStrokeColor, mSelectColor);//有输入的颜色
mTextColor = array.getColor(R.styleable.input_message_View_text_Color, mTextColor);//文字的颜色
mBgColor = array.getColor(R.styleable.input_message_View_itemBgColor, mBgColor);//item的背景色
array.recycle();
}
/**
* 初始化画笔
*/
private void initPaint() {
//设置背景色画笔 灰色
mPaintBg = new Paint();
mPaintBg.setStyle(Paint.Style.FILL);//铺满
mPaintBg.setColor(mBgColor);
mPaintBg.setAntiAlias(true);
mPaintBg.setDither(true);
//边框色画笔 没输入是灰色 输入是淡蓝色
mPaintStroke = new Paint();
mPaintStroke.setStyle(Paint.Style.STROKE);//铺满
mPaintStroke.setStrokeWidth(mStrokeSize);//边框大小
mPaintStroke.setColor(mUnSelectColor);
mPaintStroke.setAntiAlias(true);
mPaintStroke.setDither(true);
//文字画笔
mPaintText = new Paint();
mPaintText.setStyle(Paint.Style.FILL);//铺满
mPaintText.setColor(mTextColor);
mPaintText.setAntiAlias(true);
mPaintText.setDither(true);
mPaintText.setTextSize(dp2px(mIsPassWordMode ? 25 : 20));
//该方法即为设置基线上那个点究竟是left,center,还是right 这里我设置为center
mPaintText.setTextAlign(Paint.Align.CENTER);
}
/**
* 绘制背景矩形 和边框
*/
private void drawOutBg(Canvas canvas) {
mPaintStroke.setColor(Color.GRAY);
int top = mBeginY;
int bottom = top + mItemWidth;
for (int i = 0; i < mitemSize; i++) {
float left = i == 0 ? mBeginX : mItemWidth * i + mInterval * i + mBeginX;
float right = left + mItemWidth;
RectF rect_bg = new RectF(left, top, right, bottom);// 设置个新的长方形
canvas.drawRoundRect(rect_bg, 10, 10, mPaintBg);//第二个参数是x半径，第三个参数是y半径
canvas.drawRoundRect(rect_bg, 10, 10, mPaintStroke);//第二个参数是x半径，第三个参数是y半径
}
}
/**
* 输入时的变化
*
* @param canvas
*/
private void drawInput(Canvas canvas) {
int passwordLength = getText().length();
//获取Y轴基准 用于文字居中
Paint.FontMetrics fontMetrics = mPaintText.getFontMetrics();
float text_top = fontMetrics.top;//为基线到字体上边框的距离,即上图中的top
float text_bottom = fontMetrics.bottom;//为基线到字体下边框的距离,即上图中的bottom
mBaseLineY = (int) (getHeight() / 2 - text_top / 2 - text_bottom / 2);//基线中间点的y轴计算公式
//画文字
for (int i = 0; i < passwordLength; i++) {
float x = i == 0 ? mBeginX : mItemWidth * i + mInterval * i + mBeginX;
//如果不是密码模式
if (!mIsPassWordMode) {
canvas.drawText(String.valueOf(getText().charAt(i)), x + mItemWidth / 2, mBaseLineY, mPaintText);
continue;
}
//如果是密码模式
if (mIsOvalMode)
canvas.drawCircle(x + mItemWidth / 2, getHeight() / 2, mPasswordRadius, mPaintText);
else
canvas.drawText("*", x + mItemWidth / 2, mBaseLineY, mPaintText);
}
//画边框
int top = mBeginY;
int bottom = top + mItemWidth;
for (int i = 0; i < mitemSize; i++) {
mPaintStroke.setColor(i < passwordLength ? mSelectColor : mUnSelectColor);
float left = i == 0 ? mBeginX : mItemWidth * i + mInterval * i + mBeginX;
float right = left + mItemWidth;
RectF rect_bg = new RectF(left, top, right, bottom);// 设置个新的长方形
canvas.drawRoundRect(rect_bg, 10, 10, mPaintStroke);//第二个参数是x半径，第三个参数是y半径
}
}
/**
* dp 转 px
*/
private int dp2px(int dip) {
return (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP,
dip, getResources().getDisplayMetrics());
}
}
自定义属性
<declare-styleable name="input_message_View">
<!-- 密码的个数 -->
<attr name="itemNumber" format="integer"/>
<!-- 是否是密码模式 -->
<attr name="isPassword" format="boolean"/>
<!-- 未选中的边框颜色-->
<attr name="unSelectStrokeColor" format="color"/>
<!-- 选中的边框颜色-->
<attr name="selectStrokeColor" format="color"/>
<!-- 文字的颜色-->
<attr name="text_Color" format="color"/>
<!--item的背景色-->
<attr name="itemBgColor" format="color"/>
<!--是否显示圆点-->
<attr name="isOval" format="boolean"/>
</declare-styleable>
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