Android二个按钮Dialog对话框

1、res-layout-main.xml

2、MainActivity.java

导入包：

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;

MainActivity类实现：

public class MainActivity extends Activity {
	private Button btn1;

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);

		btn1 = (Button) findViewById(R.id.button1);
		btn1.setOnClickListener(new OnClickListener() {
			@Override
			public void onClick(View v) {

				AlertDialog.Builder builder = new AlertDialog.Builder(MainActivity.this);
				
				builder.setIcon(R.drawable.ic_launcher);
				builder.setTitle("你确定要离开吗？");
				builder.setPositiveButton("确定", new DialogInterface.OnClickListener() {
					
					@Override
					public void onClick(DialogInterface arg0, int arg1) {
						// TODO Auto-generated method stub
						onShowDialog("你选择了确定");
					}
		
				});
				builder.setNegativeButton("取消", new DialogInterface.OnClickListener() {
					
					@Override
					public void onClick(DialogInterface arg0, int arg1) {
						// TODO Auto-generated method stub
						onShowDialog("你选择了取消");
					}
				});
				
				builder.create().show();
			}
			
			private void onShowDialog(String str) {
				new AlertDialog.Builder(MainActivity.this)
				.setMessage(str)
				.show();
			}
		});
	}
}