Hi,
Please call setContentView(R.layout.search); before using any view.
It should look like this:
public void onCreate(Bundle icicle)
{
super.onCreate(icicle);
setContentView(R.layout.search);
searchButton = (Button) findViewById(R.id.ok);
cancelButton = (Button) findViewById(R.id.cancel);
searchButton.setOnClickListener(new clicker());
cancelButton.setOnClickListener(new clicker());
}
Hsun-Cheng Hu
On 6月28日, 上午4時22分, MichaMicha <[EMAIL PROTECTED]> wrote:
> Hello,
> I'm kinda new to Android, but got some Java experience, but still got
> this annoying error even before i see anything on the screen:
>
> ERROR/AndroidRuntime(1593): Uncaught handler: thread Main exiting due
> to uncaught exception
> ERROR/AndroidRuntime(1593): java.lang.RuntimeException: Unable to
> start activity ComponentInfo{nl.michamicha.android.androidtides/
> nl.michamicha.android.androidtides.androidtides}:
> java.lang.NullPointerException
> ERROR/AndroidRuntime(1593): at
> android.app.ActivityThread.performLaunchActivity(ActivityThread.java:
> 1758)
>
> (...)
>
> ERROR/AndroidRuntime(1593): Caused by: java.lang.NullPointerException
> ERROR/AndroidRuntime(1593): at
> nl.michamicha.android.androidtides.androidtides.onCreate(androidtides.java:
> 22)
> ERROR/AndroidRuntime(1593): at
> android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:
> 847)
> ERROR/AndroidRuntime(1593): at
> android.app.ActivityThread.performLaunchActivity(ActivityThread.java:
> 1728)
> ERROR/AndroidRuntime(1593): ... 11 more
>
> This is my code:
>
> package nl.michamicha.android.androidtides;
>
> import android.app.Activity;
> import android.os.Bundle;
> import android.view.View;
> import android.widget.Button;
>
> public class androidtides extends Activity
> {
>
> Button searchButton, cancelButton;
>
> /** Called when the activity is first created. */
> @Override
> public void onCreate(Bundle icicle)
> {
> super.onCreate(icicle);
>
> searchButton = (Button) findViewById(R.id.ok);
> cancelButton = (Button) findViewById(R.id.cancel);
>
> searchButton.setOnClickListener(new clicker());
> cancelButton.setOnClickListener(new clicker());
>
> setContentView(R.layout.search);
> }
>
> // -----------------------------------
>
> class clicker implements Button.OnClickListener
> {
> public void onClick(View v)
> {
> if (v == searchButton)
> {
>
> }
> if (v == cancelButton)
> {
>
> }
> }
>
> }
>
> }
>
> Can anyone help me with this problem??
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