Ok
In order to test about "Custom Attributes" I've made a class which
extends Button
and I made attrs.xml in values folder
This is attrs.xml code===========================
<?xml version="1.0" encoding="utf-8"?>
<resources>
<declare-styleable name="MyView">
<attr name = "textSet" format="string"/>
<attr name = "textSetClicked" format="string"/>
</declare-styleable>
</resources>
===========================================
This is man.xml which is going to use for layout
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/
android"
xmlns:app="http://schemas.android.com/apk/res/
com.android.demo.customattribute"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
>
<com.android.demo.customattribute.MyView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
app:textSet="@string/t1"
app:textSetClicked="@string/t2"
android:id="@+id/myButton"/>
</LinearLayout>
===========================================
As you can see,I defined textSet and textSetClicked then In
strings.xml I defined "string value t1 and t2"
in the Constructor of View class I made this code.
============================================
private void init(Context context,AttributeSet attrs){
TypedArray a = context.obtainStyledAttributes(attrs,
R.styleable.MyView);
CharSequence s = a.getString(R.styleable.MyView_textSet);
if(s != null){
setText(s.toString());
}
}
============================================
So that when I run application I can see a button with Text
It works !! But, I want to change the text of button so I override
OnDraw() method
===========================================
protected void onDraw(Canvas canvas) {
super.onDraw(canvas);
Log.i("MESSAGE" , "On DraW");
if(isPressed())
{
this.changeText();
}
}
==========================================
changeText() method is like that
=========================================
TypedArray a = this.mContext.obtainStyledAttributes(mAttrs,
R.styleable.MyView);
CharSequence s = a.getString(R.styleable.MyView_textSetClicked);
if(s != null){
Log.i("MESSAGE" , "SET TEXT!!!!!!!!!!!!");
setText(s.toString());
=========================================
mContext and mAttrs have already got values cos I put in Constructor
//Constructor
public MyView(Context context, AttributeSet attrs) {
mContext = context;
mAttrs = attrs;
But I can't change text cos I can't get custom attributes I don't
know why..
If it is not enough to understand what I wrote please ask me..
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