android中自定义组件的属性

1. 声明declare-styleable属性在attrs.xml文件里面

 

 

<?xml version="1.0" encoding="UTF-8"?>
<resources>  
    <declare-styleable name="MyView">  
        <attr name="color" format="color"/>  
        <attr name="size" format="dimension" /> 
         <attr name="Oriental">
            <enum name="Horizontal" value="1"></enum> 
            <enum name="Vertical" value="0"></enum>
          </attr> 
    </declare-styleable>  
</resources> 

 

 

2.在布局文件里面添加属性声明：  xmlns:test="http://schemas.android.com/apk/res/com.yuhua.test"  其中     test是控件属性的前缀名称，而com.yuhua.test是工程包名

  这里还有另外一种添加属性声明的方式：

    xmlns:test="http://schemas.android.com/apk/res-auto"

 

 

<?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.yuhua.test"  
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical" >
    <com.yuhua.test.MyTextView
        android:id="@+id/tv_test"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        test:color="#ff0000"
        test:size="23sp"
        test:Oriental="Horizontal"
        android:text="@string/hello" />
</LinearLayout>

 

 

3.在自定义组件的java代码中获取属性，并进行逻辑处理

 

 

public class MyTextView extends TextView {
	
	private static final String TAG = "MyTextView";
	
	public MyTextView(Context context) {
		super(context);
	}

	public MyTextView(Context context, AttributeSet attrs) {
		super(context, attrs);
		TypedArray typeArray = context.obtainStyledAttributes(attrs, R.styleable.MyView);
		int color = typeArray.getColor(R.styleable.MyView_color, Color.BLACK);
		float size = typeArray.getDimension(R.styleable.MyView_size, 12.0f);
		int oriental = typeArray.getInt(R.styleable.MyView_Oriental, 0);
		Log.i(TAG, "===the defOriental:" + oriental);
		this.setTextColor(color);
		this.setTextSize(size);

                typeArray.recycle();

            
	}
}