我的自定义视图的默认属性值(继承自LinearLayout)

时间:2011-02-25 12:40:50

标签: android attributes custom-controls

我有自定义布局

public class PersonView extends LinearLayout{

public PersonView(Context context, AttributeSet attrs) {
    super(context, attrs);
    initUi(context);
}

public PersonView(Context context) {
    super(context);
    initUi(context);
}

    private void initUi(Context context){
    LayoutInflater.from(context).inflate(R.layout.person_view, this, true);
    profilePicture = (ImageView)findViewById(R.id.profile_picture);
    ...
}

布局在xml中定义

<merge xmlns:android="http://schemas.android.com/apk/res/android">
   ...

然后我在其他布局中使用它

案例1

// In this case android:layout_margin is specified so it should be used
<my.package.PersonView android:layout_margin="10dp" .../>

案例2

// In this case android:layout_margin is NOT specified so I want for my PersonView some default value should be used (say 5pt)
<my.package.PersonView .../>

我应该如何为我的自定义布局PersonView实现案例2?

1 个答案:

答案 0 :(得分:4)

https://stackoverflow.com/a/25982512/3554436

已解决类似问题

android:layout_margin添加到attrs.xml

<declare-styleable name="PersonView">
    ...
    <attr name="android:layout_margin" />
    ...
</declare-styleable>

像其他自定义属性一样访问该属性:

TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.PersonView);
float margin = a.getDimension(R.styleable.PersonView_android_layout_margin, 0);
...
boolean hasMargin = a.hasValue(R.styleable.PersonView_android_layout_margin);