Android自定义View控件实现刷新效果

三种得到linearinflater的方法

a. layoutinflater inflater = getlayoutinflater();

b. layoutinflater localinflater =

(layoutinflater)context.getsystemservice
(context.layout_inflater_service);

c. layoutinflater inflater = layoutinflater.from(context);

ondraw 方法绘图，invalidate刷新界面。

效果图:

点击一下换颜色

ondraw画完图后,给控件设置点击事件 ,将参数传到控件里,然后invalidate刷新

1.ondraw画图,并增加changecolor方法

public class cusview3 extends view { 
private int color = 0; 
public cusview3(context context, attributeset attrs) { 
super(context, attrs); 
} 
@override 
protected void ondraw(canvas canvas) { 
super.ondraw(canvas); 
paint mpaint = new paint(); 
if (color > 2) { 
color = 0; 
} 
switch (color) { 
case 0: 
mpaint.setcolor(color.green); 
break; 
case 1: 
mpaint.setcolor(color.red); 
break; 
case 2: 
mpaint.setcolor(color.blue); 
break; 
default: 
break; 
} 
mpaint.setstyle(style.fill); 
mpaint.settextsize(35.0f); 
canvas.drawtext("点击我刷新", 10, 60, mpaint); 
} 
public void changecolor() { //为了让外面调用 
color++; 
} 
}

2.布局

<?xml version="1.0" encoding="utf-8"?> 
<linearlayout xmlns:android="http://schemas.android.com/apk/res/android" 
android:orientation="vertical" 
android:layout_width="fill_parent" 
android:layout_height="fill_parent" 
> 
<xue.test.cusview3 
android:id="@+id/cusview3" 
android:layout_width="wrap_content" 
android:layout_height="wrap_content" 
> 
</xue.test.cusview3> 
</linearlayout>

3.画图后 给控件设置点击事件 ,将参数传到控件里,然后invalidate刷新

public class testcustomviewactivity extends activity { 
@override 
public void oncreate(bundle savedinstancestate) { 
super.oncreate(savedinstancestate); 
setcontentview(r.layout.main); 
view3 = (cusview3) findviewbyid(r.id.cusview3); 
// 点击事件 
view3.setonclicklistener(new view.onclicklistener() { 
@override 
public void onclick(view v) { 
message message = new message(); 
message.what = 1; 
myhandler.sendmessage(message); 
} 
}); 
} 
handler myhandler = new handler() { 
// 接收到消息后处理 
public void handlemessage(message msg) { 
switch (msg.what) { 
case 1: 
// 调用方法 
view3.changecolor(); 
// 刷新方法 
view3.invalidate(); 
break; 
} 
super.handlemessage(msg); 
} 
}; 
private cusview3 view3; 
}

至于自定义控件占整屏的问题,可能需要用layoutparams

以上所述是小编给大家介绍的android自定义view控件实现刷新效果，希望对大家有所帮助