Android 自定义属性

1.位置

res/values/styles.xml

2. 定义格式：

<declare-styleable name="ExpandableTextView">
        <declare-styleable name="CustomView1">
        <attr name="text" format="string"/>
        <attr name="intType" format="integer"/>
</declare-styleable>

3. 使用

<com.android.haigeone.ui.View.CustomView1
        android:layout_width="100dp"
        android:layout_height="100dp"
        app:text="hahahaha"
        app:intType="100"
        android:background="#aaa"/>

public class CustomView1 extends View {
    private static final String TAG = "CustomView1";

    public CustomView1(Context context) {
        super(context,null);
    }

    public CustomView1(Context context, @Nullable AttributeSet attrs) {
        super(context, attrs);
        init(context,attrs);
    }

    public CustomView1(Context context, @Nullable AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
        init(context,attrs);
    }

    private void init(Context context,AttributeSet attrs){
        TypedArray typedArray = context.obtainStyledAttributes(attrs, R.styleable.CustomView1);
        String string = typedArray.getString(R.styleable.CustomView1_text);
        Log.e(TAG,"text == " + string);
        int integer = typedArray.getInteger(R.styleable.CustomView1_intType, 10);
        Log.e(TAG,"int == " + integer);
        int intValue = typedArray.getInt(R.styleable.CustomView1_intType,10);
    }
}

format 支持类型

<attr name = "background" format = "reference" />  && android:background = "@drawable/图片ID"
<attr name = "textColor" format = "color" />  &&  android:textColor = "#00FF00" 
<attr name = "focusable" format = "boolean" />  &&  android:focusable = "true"
<attr name = "layout_width" format = "dimension" />  &&  android:layout_width = "42dip"
name = "pivotX" format = "fraction"  &&  android:pivotX = "200%"
// 枚举
    <attr name="orientation">
        <enum name="horizontal" value="0" />
        <enum name="vertical" value="1" />
    </attr>
android:orientation = "vertical"
// 位运算
    <attr name="gravity">
            <flag name="top" value="0x30" />
            <flag name="bottom" value="0x50" />
            <flag name="left" value="0x03" />
            <flag name="right" value="0x05" />
            <flag name="center_vertical" value="0x10" />
            ...
    </attr>
 android:gravity="bottom|left"
//混合类型：
<attr name = "background" format = "reference|color" />
android:background = "@drawable/图片ID"   ||   android:background = "#00FF00"

{基本类型略}