my first activity runing happen error:Uncaught handler: thread main exiting due to un

hrloo.java

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package hello.pak;

import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;

public class hrllo_act<heloo> extends Activity {
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
Button btn=(Button)findViewById(R.id.go);
btn.setOnClickListener(new View.OnClickListener()
{

public void onClick(View v) {
EditText edt=(EditText)findViewById(R.id.edt);

TextView txt= (TextView)findViewById(R.id.txt);
txt.setText(getString(R.string.go)+edt.getText());

}
});
}
}


main.xml
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<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/layout"
androidrientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
>
<TextView
android:id="@+id/txt"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="@string/hello"
/>
<EditText id="@+id/edt"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text=""
/>
<Button id="@+id/go"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/go">
<requestFocus />
</Button>
</LinearLayout>


strings.xml
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<?xml version="1.0" encoding="utf-8"?>
<resources>
<string name="hello">Hello World, hrllo_act!</string>
<string name="app_name">heloo_app</string>
<string name="go">go,go,go</string>
</resources>



i think maybe folowing code have error:
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EditText edt=(EditText)findViewById(R.id.edt);

TextView txt= (TextView)findViewById(R.id.txt);


thank you!

Hi -

You simply need to add a try/catch block to your code. That will help you resolve this problem. It's also good practice for ALL of your code.

This link might help:
http://davidjhinson.wordpress.com/20...ch-everything/

ALSO: you might want to use "logcat" while running your program (I assume you're running in the emulator for now):

http://developer.android.com/guide/d...tools/adb.html