0
누구나 다음 코드에서 java.lang.NullPointerException
오류 메시지가 나타나는 이유는 무엇입니까?onCreate 함수에서 textView 텍스트 변경
package firstApp.hangman;
import android.app.Activity;
import android.app.AlertDialog;
import android.content.DialogInterface;
import android.os.Bundle;
import android.widget.TextView;
public class HangmenActivity extends Activity
{
private String word_to_guess;
@Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
this.set_random_word();
TextView wordToGuess = (TextView) findViewById(R.id.word_to_guess);
try
{
wordToGuess.setText(this.word_to_guess);
}
catch(Exception e)
{
AlertDialog alertDialog = new AlertDialog.Builder(this).create();
alertDialog.setTitle("error");
alertDialog.setMessage(e.toString());
alertDialog.setButton("OK", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
// here you can add functions
}
});
alertDialog.setIcon(R.drawable.icon);
alertDialog.show();
}
setContentView(R.layout.main);
}
private void set_random_word()
{
this.word_to_guess = "abcdef";
}
}