Android自定义布局属性

清疚 2022-06-14 00:49 319阅读 0赞

Android自定义布局属性

# 自定义属性的步骤 #

1.自定义xml文件  
2.布局中使用  
3.代码中使用

# 1.自定义xml文件 #

<?xml version="1.0" encoding="utf-8"?>
    <resources>
        <declare-styleable name=“myview”>
             <attr name="text" format="string" />
             <attr name="testAttr" format="integer" />
        </declare-styleable>
    
    </resources>

常见的format

reference:引用资源
    
    string:字符串
    
    Color：颜色
    
    boolean：布尔值
    
    dimension：尺寸值
    
    float：浮点型
    
    integer：整型
    
    fraction：百分数
    
    enum：枚举类型
    
    flag：位或运算

举个例子：

<declare-styleable name="PercentView">
            <attr name="percent_circle_gravity">
                <flag name="left" value="0" />
                <flag name="top" value="1" />
                <flag name="center" value="2" />
                <flag name="right" value="3" />
                <flag name="bottom" value="4" />
            </attr>
            <attr name="percent_circle_radius" format="dimension" />
            <attr name="percent_circle_progress" format="integer" />
            <attr name="percent_progress_color" format="color" />
            <attr name="percent_background_color" format="color" />
        </declare-styleable>

# 2.在布局中使用 #

要声明命名空间

<?xml version="1.0" encoding="utf-8"?>
    <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:joy="http://schemas.android.com/apk/res-auto" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical">
    
        <com.whoislcj.views.PercentView android:layout_width="200dp" android:layout_height="200dp" android:layout_margin="10dp" android:background="@color/red" android:padding="10dp" joy:percent_background_color="@color/gray" joy:percent_circle_gravity="left" joy:percent_circle_progress="30" joy:percent_circle_radius="50dp" joy:percent_progress_color="@color/blue" />
    
    </LinearLayout>

# 3.代码中使用 #

public class MyTextView extends View { 
    
        private static final String TAG = MyTextView.class.getSimpleName();
    
        public MyTextView(Context context, AttributeSet attrs) {
            super(context, attrs);
    
            TypedArray ta = context.obtainStyledAttributes(attrs, R.styleable.test);
    
            String text = ta.getString(R.styleable.test_testAttr);
            int textAttr = ta.getInteger(R.styleable.test_text, -1);
    
            Log.e(TAG, "text = " + text + " , textAttr = " + textAttr);
    
            ta.recycle();
        }
    
    }

参考：  
[http://www.cnblogs.com/whoislcj/p/5711001.html][http_www.cnblogs.com_whoislcj_p_5711001.html]  
[http://blog.csdn.net/lmj623565791/article/details/45022631/][http_blog.csdn.net_lmj623565791_article_details_45022631]

[http_www.cnblogs.com_whoislcj_p_5711001.html]: http://www.cnblogs.com/whoislcj/p/5711001.html
[http_blog.csdn.net_lmj623565791_article_details_45022631]: http://blog.csdn.net/lmj623565791/article/details/45022631/