Hi, I want to create an experimental custom component which consists
of just one EditText and one TextView. So I did this:
package com.customcomponent;
import android.app.Activity;
import android.content.Context;
import android.util.Log;
import android.widget.AbsoluteLayout;
import android.widget.EditText;
import android.widget.TextView;
class CustomEditText extends AbsoluteLayout {
EditText editText;
TextView textView;
CustomEditText(Activity activity) {
super(activity);
textView= (TextView)activity.findViewById(R.id.textView);
Log.v("CustomEditText constructor","initialized textView");
editText= (EditText)activity.findViewById(R.id.editText);
Log.v("CustomEditText constructor","initialized editText");
// TODO Auto-generated constructor stub
}
public void setItem1 (CharSequence charSequence){
editText.setText(charSequence);
Log.v("CustomEditText setItem","set textView");
textView.setText(charSequence);
Log.v("CustomEditText setItem","set editText");
}
}
My XML file looks like:
<?xml version="1.0" encoding="utf-8"?>
<AbsoluteLayout
android:id="@+id/absoluteLayout"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
xmlns:android="http://schemas.android.com/apk/res/android";
>
<EditText
android:id="@+id/editText"
android:layout_width="316px"
android:layout_height="228px"
android:text="EditText"
android:textSize="18sp"
android:layout_x="3px"
android:layout_y="5px"
/>
<TextView
android:id="@+id/textView"
android:layout_width="312px"
android:layout_height="181px"
android:text="TextView"
android:layout_x="5px"
android:layout_y="234px"
/>
</AbsoluteLayout>
I create an object of the custom component in my main class, I have
tried constructing is:
customEditText = new CustomEditText (this);
and
customEditText =
(CustomEditText)this.findViewById(R.layout.component);
even though I can construct, the setItem function gives a null pointer
exception.
Thanks,
Sylvester
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