自定义view(自定义view的时候,三个构造函数各自的作用)
package com.timeshare.tmband.Utils; 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.graphics.Typeface; import android.util.AttributeSet; import android.util.Log; import android.view.View; import com.timeshare.tmband.R; /** * 仿iphone带进度的进度条,线程安全的View,可直接在线程中更新进度 * * @author ailin * */ public class RoundProgressBar extends View { /** * 画笔对象的引用 */ private Paint paint; /** * 圆环的颜色 */ private int roundColor; /** * 圆环进度的颜色 */ private int roundProgressColor; /** * 中间进度百分比的字符串的颜色 */ private int textColor; /** * 中间进度百分比的字符串的字体 */ private float textSize; /** * 圆环的宽度 */ private float roundWidth; /** * 最大进度 */ private int max; /** * 当前进度 */ private int progress; private int hour=0; private int min=0; private String tear=null; /** * 是否显示中间的进度 */ private boolean textIsDisplayable; /** * 进度的风格,实心或者空心 */ private int style; public static final int STROKE = 0; public static final int FILL = 1; public RoundProgressBar(Context context) { this(context, null); //在java代码创建视图的时候被调用,如果是从xml填充的视图,就不会调用这个 } public RoundProgressBar(Context context, AttributeSet attrs) { this(context, attrs, 0);
//这个是在xml创建但是没有指定style的时候被调用 }
public RoundProgressBar(Context context, AttributeSet attrs, int defStyle) { super(context, attrs, defStyle); paint = new Paint(); TypedArray mTypedArray = context.obtainStyledAttributes(attrs, R.styleable.RoundProgressBar); // 获取自定义属性和默认值 roundColor = mTypedArray.getColor( R.styleable.RoundProgressBar_roundColor, Color.RED); roundProgressColor = mTypedArray.getColor( R.styleable.RoundProgressBar_roundProgressColor, Color.GREEN); textColor = mTypedArray.getColor( R.styleable.RoundProgressBar_textColor, Color.GREEN); textSize = mTypedArray.getDimension( R.styleable.RoundProgressBar_textSize, 15); roundWidth = mTypedArray.getDimension( R.styleable.RoundProgressBar_roundWidth, 5); max = mTypedArray.getInteger(R.styleable.RoundProgressBar_max, 100); textIsDisplayable = mTypedArray.getBoolean( R.styleable.RoundProgressBar_textIsDisplayable, true); style = mTypedArray.getInt(R.styleable.RoundProgressBar_style, 0); mTypedArray.recycle(); } @Override protected void onDraw(Canvas canvas) { super.onDraw(canvas); /** * 画最外层的大圆环 */ int centre = getWidth() / 2; // 获取圆心的x坐标 int radius = (int) (centre - roundWidth / 2); // 圆环的半径 paint.setColor(roundColor); // 设置圆环的颜色 paint.setStyle(Paint.Style.STROKE); // 设置空心 paint.setStrokeWidth(roundWidth); // 设置圆环的宽度 paint.setAntiAlias(true); // 消除锯齿 canvas.drawCircle(centre, centre, radius, paint); // 画出圆环 Log.e("log", centre + ""); /** * 画进度百分比 */ paint.setStrokeWidth(0); paint.setColor(textColor); paint.setTextSize(textSize); paint.setTypeface(Typeface.DEFAULT_BOLD); // 设置字体 int percent = (int) (((float) progress / (float) max) * 100); // 中间的进度百分比,先转换成float在进行除法运算,不然都为0 float textWidth = paint.measureText(percent + ""); // 测量字体宽度,我们需要根据字体的宽度设置在圆环中间 if (textIsDisplayable && style == STROKE) { canvas.drawText(percent + "", centre - textWidth / 2, centre + textSize / 2, paint); // 画出进度百分比 Paint paint1 = new Paint(); paint1.setStrokeWidth(0); paint1.setColor(textColor); paint1.setTextSize(14); paint1.setTypeface(Typeface.DEFAULT_BOLD); // 设置字体 canvas.drawText("%", centre + textWidth / 2, centre + textSize / 2, paint1); // 画出进度百分比 } /** * 画圆弧 ,画圆环的进度 */ // 设置进度是实心还是空心 paint.setStrokeWidth(roundWidth); // 设置圆环的宽度 paint.setColor(roundProgressColor); // 设置进度的颜色 RectF oval = new RectF(centre - radius, centre - radius, centre + radius, centre + radius); // 用于定义的圆弧的形状和大小的界限 switch (style) { case STROKE: { paint.setStyle(Paint.Style.STROKE); canvas.drawArc(oval, 0, 360 * progress / max, false, paint); // 根据进度画圆弧 break; } case FILL: { paint.setStyle(Paint.Style.FILL_AND_STROKE); if (progress != 0) canvas.drawArc(oval, 0, 360 * progress / max, true, paint); // 根据进度画圆弧 break; } } } public synchronized int getMax() { return max; } /** * 设置进度的最大值 * * @param max */ public synchronized void setMax(int max) { if (max < 0) { throw new IllegalArgumentException("max not less than 0"); } this.max = max; } /** * 获取进度.需要同步 * * @return */ public synchronized int getProgress() { return progress; } /** * 设置进度,此为线程安全控件,由于考虑多线的问题,需要同步 刷新界面调用postInvalidate()能在非UI线程刷新 * * @param progress */ public synchronized void setProgress(int progress) { if (progress < 0) { throw new IllegalArgumentException("progress not less than 0"); } if (progress > max) { progress = max; } if (progress <= max) { this.progress = progress; postInvalidate(); } } public int getCricleColor() { return roundColor; } public void setCricleColor(int cricleColor) { this.roundColor = cricleColor; } public int getCricleProgressColor() { return roundProgressColor; } public void setCricleProgressColor(int cricleProgressColor) { this.roundProgressColor = cricleProgressColor; } public int getTextColor() { return textColor; } public void setTextColor(int textColor) { this.textColor = textColor; } public float getTextSize() { return textSize; } public void setTextSize(float textSize) { this.textSize = textSize; } public float getRoundWidth() { return roundWidth; } public void setRoundWidth(float roundWidth) { this.roundWidth = roundWidth; } }
不积跬步,无以至千里。