Android 自定义优惠券布局

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import android.content.Context;import android.graphics.Canvas;import android.graphics.Color;import android.graphics.Paint;import android.util.AttributeSet;import android.widget.LinearLayout;/** * Created by 折扣卷布局  */public class CouponsView extends LinearLayout {    private Paint mPaint;    /**     * 圆间距     */    private float gap = 8;    /**     * 半径     */    private float radius = 10;    /**     * 圆数量     */    private int circleNum;    private float remain;    public CouponsView(Context context) {        super(context);    }    public CouponsView(Context context, AttributeSet attrs) {        super(context, attrs);        mPaint = new Paint(Paint.ANTI_ALIAS_FLAG);        mPaint.setDither(true);        mPaint.setColor(Color.WHITE);        mPaint.setStyle(Paint.Style.FILL);    }    @Override    protected void onSizeChanged(int w, int h, int oldw, int oldh) {        super.onSizeChanged(w, h, oldw, oldh);        if (remain == 0) {            remain = (int) (w - gap) % (2 * radius + gap);        }        circleNum = (int) ((w - gap) / (2 * radius + gap));    }    public CouponsView(Context context, AttributeSet attrs, int defStyleAttr) {        super(context, attrs, defStyleAttr);    }    @Override    protected void onDraw(Canvas canvas) {        super.onDraw(canvas);        for (int i=0;i<circleNum;i++){            float x = gap+radius+remain/2+((gap+radius*2)*i);            canvas.drawCircle(x,0,radius,mPaint);            canvas.drawCircle(x,getHeight(),radius,mPaint);        }    }}

<FrameLayout        android:layout_width="match_parent"        android:layout_height="match_parent"        android:clipChildren="false"        android:layout_centerInParent="true"        android:background="@android:color/white">        <com.zhy.magicviewpager.sample.CouponsView            android:orientation="horizontal"            android:layout_width="match_parent"            android:layout_height="wrap_content"            android:layout_margin="10dp"            android:background="@color/accent_material_light"            android:padding="20dp">            <ImageView                android:layout_width="120dp"                android:layout_height="match_parent"                android:src="@mipmap/ic_launcher"                android:scaleType="centerCrop"/>            <LinearLayout                android:layout_width="match_parent"                android:layout_height="wrap_content"                android:orientation="vertical"                android:paddingLeft="16dp">                <TextView                    android:layout_width="wrap_content"                    android:layout_height="wrap_content"                    android:textSize="18dp"                    android:text="豪华游卷"                    />                <TextView                    android:layout_width="wrap_content"                    android:layout_height="wrap_content"                    android:textSize="12dp"                    android:padding="5dp"                    android:text="编号:2016042304561456"                    />                <TextView                    android:layout_width="wrap_content"                    android:layout_height="wrap_content"                    android:textSize="12dp"                    android:padding="5dp"                    android:text="编号:2016042304561456"                    />                <TextView                    android:layout_width="wrap_content"                    android:layout_height="wrap_content"                    android:textSize="12dp"                    android:paddingLeft="5dp"                    android:paddingTop="5dp"                    android:text="截止日期:2016-10-05"                    />            </LinearLayout>        </com.zhy.magicviewpager.sample.CouponsView>    </FrameLayout>

http://www.cnblogs.com/yangqiangyu/p/5499945.html

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