you should use
public MapCanvas(Context context, AttributeSet attrs) {
super(context, attrs);// id is in the attrs, if you didn't pass
the id to the view class, the class have no id.
initialize();
}
On Dec 4, 5:41 pm, krekar <[email protected]> wrote:
> hi, there...
>
> I wrote CustomView Class, and load it in layout.
>
> so i trid to find CustomView using findViewById() in activiy to get
> handle.
>
> but findViewById() was return null.
>
> I need your help .
>
> Written Code is like below:
>
> ---------------------------------------------------------------------------------------------------------------------
>
> main.xml:
>
> <?xml version="1.0" encoding="utf-8"?>
> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/
> android"
> android:orientation="vertical"
> android:layout_width="fill_parent"
> android:layout_height="fill_parent"
> >
> <TextView
> android:layout_width="fill_parent"
> android:layout_height="10dp"
> android:text="@string/hello" />
> <com.test.MapCanvas
> android:id="@+id/map_canvas"
> android:layout_width="fill_parent"
> android:layout_height="100dp"
> android:focusable="true"
> android:clickable="true" />
> </LinearLayout>
>
> ---------------------------------------------------------------------------------------------------------------------
>
> MapCanvas.java:
>
> package com.test;
>
> import android.content.Context;
> import android.graphics.Bitmap;
> import android.graphics.Canvas;
> import android.util.AttributeSet;
> import android.view.View;
>
> public class MapCanvas extends View {
> // ...
> public MapCanvas(Context context) {
> super(context);
> initialize();
> }
>
> public MapCanvas(Context context, AttributeSet attrs) {
> super(context);
> initialize();
> }
>
> private void initialize() {
> // ...
> }
>
> �...@override
> protected void onDraw(Canvas canvas) {
> // ...
> }
>
> }
>
> ---------------------------------------------------------------------------------------------------------------------
>
> Test.java (Activity)
>
> package com.test;
>
> import android.app.Activity;
> import android.os.Bundle;
> import com.test.MapCanvas;
>
> public class Test extends Activity {
> /** Called when the activity is first created. */
> private MapCanvas mapCanvas;
> @Override
> public void onCreate(Bundle savedInstanceState) {
> super.onCreate(savedInstanceState);
> setContentView(R.layout.main);
> mapCanvas = (MapCanvas)this.findViewById(R.id.map_canvas); //
> *** null return.
> }
>
> }
>
> ---------------------------------------------------------------------------------------------------------------------
--
You received this message because you are subscribed to the Google
Groups "Android Developers" group.
To post to this group, send email to [email protected]
To unsubscribe from this group, send email to
[email protected]
For more options, visit this group at
http://groups.google.com/group/android-developers?hl=en
