Android常见控件— — —AlertDialog

package com.example.uiwidgettest2;

import android.app.Activity;import android.app.AlertDialog;import android.content.DialogInterface;import android.os.Bundle;import android.view.View;import android.widget.*;

public class AlertDialogActivity extends Activity{

    private ProgressBar progressBar = null;    private Button btn1 = null;

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

        progressBar = (ProgressBar)findViewById(R.id.progress_bar);        btn1 = (Button)findViewById(R.id.button1);

        btn1.setOnClickListener(new View.OnClickListener() {            @Override            public void onClick(View v) {                AlertDialog.Builder dialog = new AlertDialog.Builder(AlertDialogActivity.this);

                dialog.setTitle("警告框");                dialog.setMessage("内容");                dialog.setCancelable(false);                dialog.setPositiveButton("OK", new DialogInterface.OnClickListener() {                    @Override                    public void onClick(DialogInterface dialog, int which) {

                    }                });                dialog.setNegativeButton("Cancel", new DialogInterface.OnClickListener() {                    @Override                    public void onClick(DialogInterface dialog, int which) {

                    }                });                dialog.show();

            }        });

    }