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转载请注明地址:http://blog.csdn.net/ethan_xue/article/details/7313788
ps: 可根据apidemo里LableView,list4,list6学习
文档在dev guide/Framework Topics/User Interface/Building Custom Components
自定义控件的步骤:
1 View的工作原理 2 编写View类 3 为View类增加属性 4 绘制屏幕 5 响应用户消息 6 自定义回调函数
不多说,主要是Canvas, Paint, Path
- public class CustomView1 extends View {
-
- private Paint mPaint;
-
- private String mText = "drawText";
-
- public CustomView1(Context context, AttributeSet attrs) {
- super(context, attrs);
- }
-
- @Override
- protected void onDraw(Canvas canvas) {
- super.onDraw(canvas);
- mPaint = new Paint();
- mPaint.setColor(Color.BLUE);
-
- mPaint.setStyle(Style.FILL);
- canvas.drawRect(new Rect(10, 10, 100, 100), mPaint);
-
- mPaint.setColor(Color.GREEN);
- mPaint.setTextSize(35.0f);
- canvas.drawText(mText, 10, 60, mPaint);
- }
-
- }
布局
- <pre name="code" class="java"><?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"
- >
- <ethan.customview1.CustomView1
- android:layout_width="wrap_content"
- android:layout_height="wrap_content"
- />
- </LinearLayout></pre><pre name="code" class="java"></pre>
效果图
注意,此时,在控件下放一个textView的话,是显示不出来的(TextView放在控件上面可以显示),以后再解决
下载地址 http://download.csdn.net/detail/ethan_xue/4108820
android自定义控件(二) 入门,继承View
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原文地址:http://www.cnblogs.com/chengzhengfu/p/4574084.html