Android自定义XML属性

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

    <declare-styleable name="RatioLayout">
        <attr name="picRatio" format="float" />
        <attr name="relative">
            <enum name="width" value="0" />
            <enum name="height" value="1" />
        </attr>
    </declare-styleable>

</resources>

        <com.itheima.googleplay_8.views.RatioLayout
            xmlns:itheima="http://schemas.android.com/apk/res-auto"
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"
            itheima:relative="width"
            itheima:picRatio="2.43" >

    public RatioLayout(Context context, AttributeSet attrs) {
        super(context, attrs);

        TypedArray typedArray = context.obtainStyledAttributes(attrs, R.styleable.RatioLayout);

        mPicRatio = typedArray.getFloat(R.styleable.RatioLayout_picRatio, 0);

        mRelative = typedArray.getInt(R.styleable.RatioLayout_relative, RELATIVE_WIDTH);

        typedArray.recycle();
    }

    <com.example.myview.MyView
        android:id="@+id/myView1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        yueqing:content="内容"
        yueqing:title="标题" >
    </com.example.myview.MyView>

public MyView(Context context, AttributeSet attrs) {
        super(context, attrs);

        View inflate = View.inflate(context, R.layout.myview, null);
        CheckBox cb = (CheckBox) inflate.findViewById(R.id.cb);
        TextView tv = (TextView) inflate.findViewById(R.id.tv);
        String content = attrs.getAttributeValue(
                "http://schemas.android.com/apk/res/com.example.myview",
                "content");
        if (!cb.isChecked()) {
            tv.setText(content);
        }
        
        this.addView(inflate);
        int attributeCount = attrs.getAttributeCount();
        System.out.println(attributeCount + ">>>>>>>>>>>>>>>>");
    }