? ?一值有在用网上朋友贴出来的代码,很方便,也能学到很多东西. ?这次我也贴点比较简单使用的小东西. 不怎么形容 ?有图有代码 ?自己看真想...
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主体代码
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package com.suncco.taoxie;import android.content.Context;import android.content.res.TypedArray;import android.graphics.Canvas;import android.graphics.Paint;import android.util.AttributeSet;import android.util.Log;import android.view.View;public class MyView extends View { private int count; private float space, radii; private int point_normal_color, point_seleted_color; // 选中 private int selected = 0; // background seleted normal public MyView(Context context, AttributeSet attrs) { super(context, attrs); TypedArray a = context .obtainStyledAttributes(attrs, R.styleable.MyView); count = a.getInteger(R.styleable.MyView_count, 3); space = a.getDimension(R.styleable.MyView_space, 9); radii = a.getDimension(R.styleable.MyView_point_radii, 9); point_normal_color = a.getColor(R.styleable.MyView_point_normal_color, 0x000000); point_seleted_color = a.getColor( R.styleable.MyView_point_seleted_color, 0xffff07); int sum = attrs.getAttributeCount(); a.recycle(); } public void setCount(int count) { this.count = count; invalidate(); } public void next() { if (selected < count - 1) selected++; else selected = 0; invalidate(); } public void previous() { if (selected > 0) selected--; else selected = count - 1; invalidate(); } @Override protected void onDraw(Canvas canvas) { Paint paint = new Paint(); paint.setAntiAlias(true); // 起始位置,实现整体居中 float w = canvas.getWidth() - (count * 2 * radii) - space * (count - 1); for (int i = 0; i < count; i++) { if (i == selected) paint.setColor(point_seleted_color); else paint.setColor(point_normal_color); canvas.drawCircle(w / 2.f + radii + i * (space + radii + radii), radii + 1, ((int) radii + 2) / 2, paint); } } @Override protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { super.onMeasure(widthMeasureSpec, heightMeasureSpec); setMeasuredDimension(widthMeasureSpec, (int) (radii * 2) + 2); } public void setSelected(int selectedId) { if (selectedId >= 0 && selectedId <= count) this.selected = selectedId; else if (selectedId < 0) this.selected = 0; else if (selectedId > count) this.selected = count; invalidate(); }}?
自定义View 的自定义命名空间:
以下自定义属性 ?count: 总数, space: 每个点的距离大小之类的等等 名字取得都比较通俗了...
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这个文件xml放在 value 下的 ***_attrs.xml 比如我这里去 haowuliaoa_attrs.xml
<?xml version="1.0" encoding="utf-8"?><resources> <declare-styleable name="MyView"> <attr name="count" format="integer" /> <attr name="space" format="dimension" /> <attr name="point_size" format="dimension" /> <attr name="point_seleted_color" format="color|reference" /> <attr name="point_normal_color" format="color|reference" /> <attr name="point_radii" format="dimension" /> </declare-styleable></resources>?
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一切ok了, 可以直接在xml布局上应用咯...
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首先要在布局的头 添加上自己的命名空间xmlns:haowuliaoa="http://schemas.android.com/apk/res/自己的包名"
然后就是xml布局咯...
<包名.MyView android:id="@+id/myView" android:layout_width="fill_parent" android:layout_height="10dip" android:background="#00000000" android:gravity="center" android:layout_marginBottom="4dip" haowuliaoa_attrs:count="6" suncco:space="10dip" haowuliaoa_attrs:point_size="4dip" haowuliaoa_attrs:point_seleted_color="#ff0000" haowuliaoa_attrs:point_normal_color="#ffffff" haowuliaoa_attrs:point_radii="5dip" />
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so 简单吧....
图片下面的小点就是今天的效果哦 很常用的
功能却是经常能用到的哦 ?...
