一值有在用網上朋友貼出來的代碼,很方便,也能學到很多東西. 這次我也貼點比較簡單使用的小東西. 不怎麼形容 有圖有代碼 自己看真想…
主體代碼
Myview代碼
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;
// 選中
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,實現整體居中
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();
}
}
自定義View 的自定義命名空間:
以下自定義屬性 count: 總數, space: 每個點的距離大小之類的等等 名字取得都比較通俗瞭…
命名空間也直接叫myview瞭…代碼
這個文件xml放在 value 下的 ***_attrs.xml 比如我這裡去 haowuliaoa_attrs.xml
命名空間也直接叫myview瞭…代碼
<?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>
一切ok瞭, 可以直接在xml佈局上應用咯…
Xml代碼
首先要在佈局的頭 添加上自己的命名空間
xmlns:haowuliaoa="http://schemas.android.com/apk/res/自己的包名"
Xml代碼
然後就是xml佈局咯…
Xml代碼
<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" suncco:count="6" suncco:space="10dip"
suncco:point_size="4dip" suncco:point_seleted_color="#ff0000"
suncco:point_normal_color="#ffffff" suncco:point_radii="5dip" />
so 簡單吧….
圖片下面的小點就是今天的效果哦 很常用的
功能卻是經常能用到的哦 …
作者“whyhappy”
