Android中自定义属性基本步骤

Android中自定义属性基本步骤

1. 创建资源文件: resources/attr.xml

<?xml version="1.0" encoding="utf-8"?>
<resources>
<declare-styleable name="test">
<attr name="test" format="string" />
<attr name="testArr" format="integer" />
</declare-styleable>
</resources>

2. 自定义view类

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

public MyTextView(Context context, AttributeSet attrs) {
super(context, attrs);
TypedArray ta = context.obtainStyledAttributes(attrs,R.styleable.test);
String text = ta.getString(R.styleable.test_testArr);
int textAttr = ta.getInteger(R.styleable.test_text, -1);
Log.e(TAG, "text:"+text+",textAttr:"+textAttr);

ta.recycle();
}
}

3. 在布局文件中使用

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
xmlns:yxm="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="org.xm.customview.MainActivity">

<org.xm.customview.MyTextView
android:layout_width="100dp"
android:layout_height="200dp"
yxm:testArr="20"
yxm:text="xiaoming" />
</RelativeLayout>

注意

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

xmlns:sdf="http://schemas.android.com/apk/res/org.xm.customview"

yxm:testArr="20"

4. 实现自定义View,获取自定义属性

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

public MyTextView(Context context, AttributeSet attrs) {
super(context, attrs);
TypedArray ta = context.obtainStyledAttributes(attrs,R.styleable.test);
String text = ta.getString(R.styleable.test_text);
int textAttr = ta.getInteger(R.styleable.test_testArr, -1);
Log.e(TAG, "text:"+text+",textAttr:"+textAttr);

ta.recycle();
}
}

注意

R.styleable.test_text