Android中对字体进行描边

package com.showly.an.zb.liveSelf.util;

import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.text.TextPaint;
import android.util.AttributeSet;
import android.view.ViewGroup;
import android.widget.TextView;

public class StrokeTextView extends android.support.v7.widget.AppCompatTextView {
private TextView outlineTextView = null;

public StrokeTextView(Context context) {
super(context);
outlineTextView = new TextView(context);
init();
}

public StrokeTextView(Context context, AttributeSet attrs) {
super(context, attrs);
outlineTextView = new TextView(context, attrs);
init();
}

public StrokeTextView(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
outlineTextView = new TextView(context, attrs, defStyle);
init();
}

public void init() {
TextPaint paint = outlineTextView.getPaint();
paint.setStrokeWidth(1);// 描边宽度
paint.setStyle(Paint.Style.STROKE);
outlineTextView.setTextColor(Color.parseColor("#000000"));// 描边颜色
outlineTextView.setGravity(getGravity());
}

@Override
public void setLayoutParams(ViewGroup.LayoutParams params) {
super.setLayoutParams(params);
outlineTextView.setLayoutParams(params);
}

@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
super.onMeasure(widthMeasureSpec, heightMeasureSpec);        // 设置轮廓文字
CharSequence outlineText = outlineTextView.getText();
if (outlineText == null || !outlineText.equals(this.getText())) {
outlineTextView.setText(getText());
postInvalidate();
}
outlineTextView.measure(widthMeasureSpec, heightMeasureSpec);
}

@Override
protected void onLayout(boolean changed, int left, int top, int right, int bottom) {
super.onLayout(changed, left, top, right, bottom);
outlineTextView.layout(left, top, right, bottom);
}

@Override
protected void onDraw(Canvas canvas) {
outlineTextView.draw(canvas);
super.onDraw(canvas);
}
}

<com.showly.an.zb.liveSelf.util.StrokeTextView
android:id="@+id/tv_time"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerInParent="true"
android:text="59:60"
android:textColor="#ffffff"
android:textSize="13sp" />