本文实例讲述了Android编程绘图操作之弧形绘制方法。分享给大家供大家参考，具体如下：

/**

* 绘制弧形图案

* @description：

* @author ldm

* @date 2016-4-25 下午4:37:01

*/

public class ArcsActivity extends Activity {

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(new SampleView(this));

}

/**

* 自定义绘制图案的View

*

* @description：

* @author ldm

* @date 2016-4-25 下午4:19:40

*/

private static class SampleView extends View {

// 画圆形图案的画笔数组

private Paint[] mPaints;

// 画矩形的画笔

private Paint mFramePaint;

// 是否以矩形中心画图

private boolean[] mUseCenters;

// 矩形框数组

private RectF[] mOvals;

// 上面较大的矩形框

private RectF mBigOval;

// 画圆弧起点

private float mStart;

// 画圆弧角度

private float mSweep;

// 画大图形对应角标index

private int mBigIndex;

// 角度变化增量

private static final float ANGLE_STEP = 3;

// 初始角度

private static final float START_ANGLE = 15;

public SampleView(Context context) {

super(context);

mPaints = new Paint[4];

mUseCenters = new boolean[4];

mOvals = new RectF[4];

mPaints[0] = new Paint();

mPaints[0].setAntiAlias(true);// 设置抗紧钜齿

mPaints[0].setStyle(Paint.Style.FILL);// 设置画笔填充风格

mPaints[0].setColor(0x88FF0000);// 设置颜色

mUseCenters[0] = false;

mPaints[1] = new Paint(mPaints[0]);

mPaints[1].setColor(0x8800FF00);

mUseCenters[1] = true;

mPaints[2] = new Paint(mPaints[0]);

mPaints[2].setStyle(Paint.Style.STROKE);// 设置画笔空心风格

mPaints[2].setStrokeWidth(4);// 设置画笔宽度

mPaints[2].setColor(0x880000FF);// 设置颜色

mUseCenters[2] = false;

mPaints[3] = new Paint(mPaints[2]);

mPaints[3].setColor(0x88888888);

mUseCenters[3] = true;

mBigOval = new RectF(40, 10, 280, 250);// 初始化较大的矩形

mOvals[0] = new RectF(10, 270, 70, 330);// 初始化4个较小矩形

mOvals[1] = new RectF(90, 270, 150, 330);

mOvals[2] = new RectF(170, 270, 230, 330);

mOvals[3] = new RectF(250, 270, 310, 330);

mFramePaint = new Paint();

mFramePaint.setAntiAlias(true);

mFramePaint.setStyle(Paint.Style.STROKE);

mFramePaint.setStrokeWidth(0);

}

@Override

protected void onDraw(Canvas canvas) {

canvas.drawColor(Color.WHITE);

// 画大矩形

canvas.drawRect(mBigOval, mFramePaint);

// 在大矩形分别 画4个圆弧图形

canvas.drawArc(mBigOval, mStart, mSweep, mUseCenters[mBigIndex],

mPaints[mBigIndex]);

for (int i = 0; i < 4; i++) {

canvas.drawRect(mOvals[i], mFramePaint);// 画四个小矩形

canvas.drawArc(mOvals[i], mStart, mSweep, mUseCenters[i],// 在四个小矩形中分别画圆弧

mPaints[i]);

}

mSweep += ANGLE_STEP;// 弧度改变

if (mSweep > 360) {// 弧度控制

mSweep -= 360;

mStart += START_ANGLE;

if (mStart >= 360) {

mStart -= 360;

}

mBigIndex = (mBigIndex + 1) % mOvals.length;

}

invalidate();

}

}

}

静态效果如图：

希望本文所述对大家Android程序设计有所帮助。