我试图根据电池百分比绘制一个圆圈。我有以下代码:
Bitmap.Config conf = Bitmap.Config.ARGB_8888; // see other conf types
Bitmap bmp = Bitmap.createBitmap(200, 200, conf);
Paint mPaint = new Paint();
mPaint.setDither(true);
mPaint.setColor(Color.BLUE);
mPaint.setStyle(Paint.Style.STROKE);
mPaint.setStrokeJoin(Paint.Join.ROUND);
mPaint.setStrokeCap(Paint.Cap.ROUND);
mPaint.setStrokeWidth(5);
circle = new Path();
circle.addCircle(100, 100, level, Direction.CW);
Canvas canvas = new Canvas(bmp);
canvas.drawPath(circle, mPaint);
我想尝试类似于电池小工具重生,其中根据百分比绘制的圆形路径,有人可以帮助。
编辑:
下面是我想要完成的一个镜头
答案 0 :(得分:4)
您可以将此类用作完整的工作示例。您也可以在视图中添加文本,但这超出了问题...
import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.RectF;
import android.view.View;
public class DrawView extends View {
Paint mPaint = new Paint();
public DrawView(Context context) {
super(context);
}
@Override
public void onDraw(Canvas canvas) {
Paint mPaint = new Paint(Paint.FILTER_BITMAP_FLAG |
Paint.DITHER_FLAG |
Paint.ANTI_ALIAS_FLAG);
mPaint.setDither(true);
mPaint.setColor(Color.GRAY);
mPaint.setStyle(Paint.Style.STROKE);
mPaint.setStrokeWidth(1);
int size = 200;
int radius = 190;
int delta = size - radius;
int arcSize = (size - (delta / 2)) * 2;
int percent = 42;
//Thin circle
canvas.drawCircle(size, size, radius, mPaint);
//Arc
mPaint.setColor(Color.parseColor("#33b5e5"));
mPaint.setStrokeWidth(15);
RectF box = new RectF(delta,delta,arcSize,arcSize);
float sweep = 360 * percent * 0.01f;
canvas.drawArc(box, 0, sweep, false, mPaint);
}
}
答案 1 :(得分:2)
您应该可以使用Path.addArc()
执行此操作。您只需定义包围矩形的边界,起始角度以及扫描的度数。
类似的东西:
RectF box = new RectF(0,0,bmp.getWidth(),bmp.getHeight());
float sweep = 360 * level * 0.01f;
circle.addArc(box, 0, sweep);