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[Android] Android绘制电池电量图标 [复制链接]

KingSunSha

丰衣足食

论坛徽章:: 0

电梯直达

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发表于 2015-07-28 10:33 |只看该作者 |倒序浏览

代码

public class PowerIconView extends View {
private int borderColor = 0xffc0c0c0;
private int fillColor = 0xffdedede;
private int selectColor = 0xff12b657;
private int selectAlertColor = 0xffe04d4d;
private float width;
private float height;
private float borderWidth = 2;
private float corner;
private float headerWidth;
private float value = 0;
public PowerIconView(Context context) {
super(context);
}
public PowerIconView(Context context, AttributeSet attrs) {
super(context, attrs);
}
public void setValue(float value){
this.value = value;
this.invalidate();
}
public void onDraw(Canvas canvas) {
width = getWidth();
height = getHeight();
headerWidth = width / 7;
corner = height / 5;
drawBackGround(canvas);
if (value > 0){
drawSelectView(canvas);
}
}
/**
* 绘制背景
* @param canvas
*/
private void drawBackGround(Canvas canvas) {
Paint paint = new Paint();
paint.setStrokeWidth(1);
paint.setAntiAlias(true);
paint.setColor(fillColor);
paint.setStyle(Paint.Style.FILL);
Path path = new Path();
path.moveTo(0, corner);
path.quadTo(0, 0, corner, 0);
path.lineTo(width - headerWidth - corner, 0);
path.quadTo(width - headerWidth, 0, width - headerWidth, corner);
path.lineTo(width - headerWidth, height / 4);
path.lineTo(width - corner / 2, height / 4);
path.quadTo(width, height / 4, width, height / 4 + corner / 2);
path.lineTo(width, height / 4 * 2 - corner / 2);
path.quadTo(width, height / 4 * 3, width - corner / 2, height / 4 * 3);
path.lineTo(width - headerWidth, height / 4 * 3);
path.lineTo(width - headerWidth, height - corner);
path.quadTo(width - headerWidth, height, width - headerWidth - corner, height);
path.lineTo(corner, height);
path.quadTo(0, height, 0, height - corner);
path.lineTo(0, corner);
path.close();
canvas.drawPath(path, paint);
paint.setColor(borderColor);
paint.setStrokeWidth(borderWidth);
paint.setStyle(Paint.Style.STROKE);
canvas.drawPath(path, paint);
}
/**
* 绘制电量选中效果
* @param canvas
*/
private void drawSelectView(Canvas canvas){
Paint paint = new Paint();
paint.setStrokeWidth(1);
paint.setAntiAlias(true);
paint.setColor(value <= 50 ? selectAlertColor : selectColor);
paint.setStyle(Paint.Style.FILL);
Path path = new Path();
path.moveTo(borderWidth, borderWidth + corner / 2);
path.quadTo(borderWidth, borderWidth, borderWidth + corner / 2, borderWidth);
float xTo = (value / 100.0f) * (width - 2 * borderWidth);
if (value >= 100){ //满电
path.lineTo(width - headerWidth - borderWidth - corner / 2, borderWidth);
path.quadTo(width - headerWidth - borderWidth, borderWidth, width - headerWidth - borderWidth, borderWidth + corner / 2);
path.lineTo(width - headerWidth - borderWidth, height / 4 + borderWidth);
path.lineTo(width - borderWidth, height / 4 + borderWidth);
path.lineTo(width - borderWidth, height / 4 * 3 - borderWidth);
path.lineTo(width - headerWidth - borderWidth, height / 4 * 3 - borderWidth);
path.lineTo(width - headerWidth - borderWidth, height - borderWidth - corner / 2);
path.quadTo(width - headerWidth - borderWidth, height - borderWidth, width - headerWidth - borderWidth - corner / 2, height - borderWidth);
path.lineTo(borderWidth + corner / 2, height - borderWidth);
path.quadTo(borderWidth, height - borderWidth, borderWidth, height - borderWidth - corner / 2);
path.lineTo(borderWidth, borderWidth + corner / 2);
path.close();
} else if (xTo < corner / 2){ //电量最低
path.lineTo(borderWidth + corner / 2, height -borderWidth);
path.quadTo(borderWidth, height - borderWidth, borderWidth, height -borderWidth - corner / 2);
path.lineTo(borderWidth, borderWidth + corner / 2);
} else if ((borderWidth + corner / 2 + xTo) > (width - headerWidth)){ //电量超出了右侧的正极图形处
path.lineTo(width - headerWidth - borderWidth - corner / 2, borderWidth);
path.quadTo(width - headerWidth - borderWidth, borderWidth, width - headerWidth - borderWidth, borderWidth + corner / 2);
path.lineTo(width - headerWidth - borderWidth, height / 4 + borderWidth);
path.lineTo(borderWidth + xTo, height / 4 + borderWidth);
path.lineTo(borderWidth + xTo, height / 4 * 3 - borderWidth);
path.lineTo(width - headerWidth - borderWidth, height / 4 * 3 - borderWidth);
path.lineTo(width - headerWidth - borderWidth, height - borderWidth - corner / 2);
path.quadTo(width - headerWidth - borderWidth, height - borderWidth, width - headerWidth - borderWidth - corner / 2, height - borderWidth);
path.lineTo(borderWidth + corner / 2, height - borderWidth);
path.quadTo(borderWidth, height - borderWidth, borderWidth, height - borderWidth - corner / 2);
path.lineTo(borderWidth, borderWidth + corner / 2);
} else { //电量只需要填充矩形区域
path.lineTo(borderWidth + xTo, borderWidth);
path.lineTo(borderWidth + xTo, height - borderWidth);
path.lineTo(borderWidth + corner / 2, height - borderWidth);
path.quadTo(borderWidth, height - borderWidth, borderWidth, height - borderWidth - corner / 2);
path.lineTo(borderWidth, borderWidth + corner / 2);
}
canvas.drawPath(path, paint);
}
}