Android自定义属性：attr.xml 与 TypedArray

1.attr.xml

<?xml version="1.0" encoding="utf-8"?>

<resources>

    <declare-styleable name="MyView">

        <attr name="textColor" format="color" />

        <attr name="textSize" format="dimension" />

    </declare-styleable>

</resources>

2.在构造方法中使用

public MyView(Context context,AttributeSet attrs){

        super(context,attrs);

        mPaint = new Paint();

TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.MyView);
int textColor = a.getColor(R.styleable.MyView_textColor, 0XFFFFFFFF);     //怎么获取：名字_ 属性 连接起来就可以

        float textSize = a.getDimension(R.styleable.MyView_textSize, 36);
mPaint.setTextSize(textSize);

        mPaint.setColor(textColor);
a.recycle();

    }

3.在布局文件中使用

<?xml version="1.0" encoding="utf-8"?>

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

    xmlns:test="http://schemas.android.com/apk/res/com.android.tutor"                 //自定义属性前缀 与 包名

    android:orientation="vertical"

    android:layout_width="fill_parent"

    android:layout_height="fill_parent" >

<com.android.tutor.MyView

    android:layout_width="fill_parent"

    android:layout_height="fill_parent"

    test:textSize="20px"

    test:textColor="#fff"/>

</LinearLayout>

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