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package com.example.yangenneng0.myapplication.viewUI;
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import android.content.Context;
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import android.content.res.TypedArray;
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import android.graphics.Canvas;
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import android.graphics.Color;
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import android.graphics.Paint;
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import android.graphics.Path;
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import android.graphics.RectF;
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import android.util.AttributeSet;
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import android.util.TypedValue;
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import com.example.yangenneng0.myapplication.R;
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class ArrowTextView extends android.support.v7.widget.AppCompatTextView {
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private float radius;
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private float arrowWidth;
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private float arrowHeight;
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private int color;
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public ArrowTextView(Context context, AttributeSet attrs) {
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super(context, attrs);
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ini(context, attrs);
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}
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private void ini(Context context, AttributeSet attrs) {
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TypedArray typedArray = context.obtainStyledAttributes(attrs, R.styleable.ArrowTextView);
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radius = typedArray.getDimension(R.styleable.ArrowTextView_radius, 0);
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arrowWidth = typedArray.getDimension(R.styleable.ArrowTextView_arrowWidth, 0);
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arrowHeight = typedArray.getDimension(R.styleable.ArrowTextView_arrowHeight, 0);
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color = typedArray.getColor(R.styleable.ArrowTextView_bg, Color.RED);
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}
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public ArrowTextView(Context context, AttributeSet attrs, int defStyle) {
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super(context, attrs, defStyle);
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ini(context, attrs);
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}
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public ArrowTextView(Context context) {
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super(context);
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}
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/**
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* @param arrowWidth 三角形箭头的宽度.......
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*/
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public void setArrowWidth(float arrowWidth) {
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this.arrowWidth = arrowWidth;
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invalidate();
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}
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/**
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* @param arrowHeight 三角形箭头的高度......
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*/
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public void setArrowHeight(float arrowHeight) {
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this.arrowHeight = arrowHeight;
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invalidate();
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}
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/**
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* @param radius 矩形四角圆角的半径..........
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*/
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public void setRadius(float radius) {
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this.radius = radius;
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invalidate();
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}
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/**
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* @param color 箭头矩形的背景色.........
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*/
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public void setBgColor(int color) {
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this.color = color;
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invalidate();
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}
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@Override
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protected void onDraw(Canvas canvas) {
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Paint paint = new Paint();
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paint.setColor(color == 0 ? Color.RED : color);
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paint.setAntiAlias(true);
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if (radius == 0) {
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radius = TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_PX, 5, getResources().getDisplayMetrics());
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}
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if (arrowWidth == 0) {
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arrowWidth = TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_PX, 20, getResources().getDisplayMetrics());
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}
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if (arrowHeight == 0) {
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arrowHeight = TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_PX, 15, getResources().getDisplayMetrics());
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}
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//带圆角的矩形(下边减去三角形的高度...........)
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int width = getWidth();
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Float height = getHeight() - arrowHeight;
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canvas.drawRoundRect(new RectF(0, 0, getWidth(), height), radius, radius, paint);
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//画三角形
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Path path = new Path();
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path.setFillType(Path.FillType.EVEN_ODD);
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float xMiddle = width / 2;
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float xLeft = xMiddle - arrowWidth / 2;
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float xRight = xMiddle + arrowWidth / 2;
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float yBottom = height + arrowHeight;
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path.moveTo(xMiddle, yBottom);
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path.lineTo(xLeft, height-1);
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path.lineTo(xRight, height-1);
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path.lineTo(xMiddle, yBottom);
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path.close();
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canvas.drawPath(path, paint);
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// canvas.restore();
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// canvas.translate(left, 0);
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super.onDraw(canvas);
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}
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}
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