Android自訂屬性：attr.xml 與 TypedArray

標籤：android   style   blog   class   code   java   

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.在構造方法中使用

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);     //怎麼擷取：名字_ 屬性 串連起來就可以        float textSize = a.getDimension(R.styleable.MyView_textSize, 36);                mPaint.setTextSize(textSize);        mPaint.setColor(textColor);                a.recycle();    }

 

3.在布局檔案中使用

<?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"                 //自訂屬性首碼 與 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>