Android开发之AlertDialog警告提示框删除与取消 详解代码

package cc.jiusansec.www;

import android.app.Activity;
import android.app.AlertDialog;
import android.content.DialogInterface;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.Toast;

public class MainActivity extends Activity implements OnClickListener{
	private Button button;

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);
		button = (Button) findViewById(R.id.btn);
		button.setOnClickListener(new OnClickListener() {

			public void onClick(View v) {
				// TODO Auto-generated method stub
				AlertDialog.Builder builder = new AlertDialog.Builder(MainActivity.this);
				builder.setTitle("woshititle");
				builder.setMessage("woshimessage");
				AlertDialog alertDialog = builder.create();
				builder.setPositiveButton("确定", new DialogInterface.OnClickListener() {

					public void onClick(DialogInterface dialog, int which) {
						// TODO Auto-generated method stub
						Toast.makeText(MainActivity.this, "我是积极的", 1).show();
					}
				});
				builder.setNegativeButton("取消", new DialogInterface.OnClickListener() {

					public void onClick(DialogInterface dialog, int which) {
						Toast.makeText(MainActivity.this, "我是消极", 1).show();

					}
				});
				builder.setNeutralButton("关闭窗口", new DialogInterface.OnClickListener() {

					public void onClick(DialogInterface dialog, int which) {
						// TODO Auto-generated method stub
						Toast.makeText(MainActivity.this, "我是neutralButton", 0).show();
					}
				});

				builder.show();

			}
		});

	}
	public void onClick(View v) {
		// TODO Auto-generated method stub

	}

}