android convas 自定义控件

新建一个类，继承于view

核心代码：

	@Override
	protected void onDraw(Canvas canvas) {
		super.onDraw(canvas);

		canvas.save();

		canvas.drawRect(0, 0, 120, 120, paint);
		canvas.restore();

		invalidate();
	}

 

	private Paint paint;

	public void init() {
		paint = new Paint();
		paint.setColor(0x000ffff);
		 
	}

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent" >
 

    <com.example.test_an_3.MyView
        android:id="@+id/myView1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content" />

</RelativeLayout>