我正在玩一个简单的应用程序,我想单击按钮时显示警报。如何在点击按钮时获得简单提醒?
我到目前为止的代码是:
package max.helloworld.firstapp;
import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.app.AlertDialog;
import android.content.Context;
import android.content.DialogInterface;
import android.content.DialogInterface.OnClickListener;
public class HelloWorldActivity extends Activity {
/** Called when the activity is first created. */
private Button closeButton;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
this.setContentView(R.layout.main);
this.closeButton = (Button)this.findViewById(R.id.close);
this.closeButton.setKeyListener(new onClickListener() {
@Override
public void onClick(View v) {
AlertDialog alertDialog = new AlertDialog.Builder(this).create();
alertDialog.setTitle("Transformers");
alertDialog.setMessage("Optimus Prime");
alertDialog.setButton("OK", new OnClickListener(){
public void onClick(DialogInterface dialog, int which){
}
});
//alertDialog.setIcon(R.drawable.icon);
alertDialog.show();
finish();
}
});
}
}
的问题是,它说AlertDialog alertDialog =新AlertDialog.Builder(本).create();
它说构造函数是未定义的。我该如何解决这个问题?
为什么你叫结束之后呢?你有两次setContentView - 为什么? – hovanessyan 2012-01-17 16:45:09
我删除了那些,我正在查看各种网站的代码,并且必须将其放入两次。 – user1154405 2012-01-17 17:07:19