提示框：Dialog的用法 与 封装

用法 ：
第一步，创建一个弹出框对象：

AlertDialog.Builder builder=new AlertDialog.Builder(this);

第二步，设置相关属性：

builder.setTitle("提示");//标题builder.setMessage(getString(R.string.change_pwd_success));//身体部分显示的信息，即要提示的内容

第三步，确定按钮，取消按钮，可按需取舍:

//确定按钮builder.setPositiveButton("确定",new DialogInterface.OnClickListener() {                        @Override                        public void onClick(DialogInterface dialog, int which) {                            dialog.dismiss();                            ChangePwdActivity.this.finish();                        }                    });

//取消按钮builder.setNegativeButton("取消",new DialogInterface.OnClickListener() {                        @Override                        public void onClick(DialogInterface dialog, int which) {                            dialog.dismiss();                        }                    });

第四步，调用方法

builder.create().show();

完整代码：

AlertDialog.Builder builder=new AlertDialog.Builder(this);                    builder.setTitle("提示");                    builder.setMessage(getString(R.string.change_pwd_success));                    builder.setPositiveButton("确定",new DialogInterface.OnClickListener() {                        @Override                        public void onClick(DialogInterface dialog, int which) {                            dialog.dismiss();                            ChangePwdActivity.this.finish();                        }                    });                    builder.setNegativeButton("取消",new DialogInterface.OnClickListener() {                        @Override                        public void onClick(DialogInterface dialog, int which) {                            dialog.dismiss();                        }                    });                    builder.create().show();

封装:
DialogUtil.java完整代码：

package com.hanway.oa.util;import android.app.AlertDialog;import android.content.Context;import android.content.DialogInterface;import android.content.DialogInterface.OnClickListener;import android.view.Gravity;import android.view.View;import android.widget.Toast;import com.hanway.oa.activity.ShitangActivity;import android.app.Activity;public class DialogUtil {    // 定义一个显示消息的对话框    public static void showDialog(final Context ctx, String msg,            boolean closeSelf) {        // 创建一个AlertDialog.Builder对象        AlertDialog.Builder builder = new AlertDialog.Builder(ctx).setMessage(                msg).setCancelable(false);        if (closeSelf) {            builder.setPositiveButton("确定", new OnClickListener() {                @Override                public void onClick(DialogInterface dialog, int which) {                    // 结束当前Activity                    ((Activity) ctx).finish();                }            });        } else {            builder.setPositiveButton("确定", null);        }        builder.create().show();    }    public static void showListDialog(final Context ctx,String title,String[] items,Boolean closeSelf,OnClickListener listener) {        AlertDialog.Builder builder = new AlertDialog.Builder(ctx);        builder.setTitle(title);        builder.setItems(items,listener );        builder.show();    }    // 定义一个显示指定组件的对话框    public static void showDialog(Context ctx, View view) {        AlertDialog.Builder builder = new AlertDialog.Builder(ctx)                .setView(view).setCancelable(false)                .setPositiveButton("确定", null);        builder.create().show();    }    public static void showDialog(final Context ctx, String msg,            OnClickListener listener) {        // 创建一个AlertDialog.Builder对象        AlertDialog.Builder builder = new AlertDialog.Builder(ctx).setMessage(                msg).setCancelable(false);        builder.setPositiveButton("确定", listener).show();    }    public static void showSelectDialog(final Context ctx, String msg,Boolean useAble,            OnClickListener listener) {        // 创建一个AlertDialog.Builder对象        AlertDialog.Builder builder = new AlertDialog.Builder(ctx).setMessage(                msg);        builder.setTitle("提示");        if (useAble) {            builder.setPositiveButton("确定", listener);        }        builder.setNeutralButton("取消", new OnClickListener() {            @Override            public void onClick(DialogInterface dialog, int which) {                // TODO Auto-generated method stub                dialog.dismiss();            }        });        builder.show();    }    public static AlertDialog showDialog(final Context ctx, String msg,            OnClickListener positivelistener, OnClickListener negetivelistener) {        // 创建一个AlertDialog.Builder对象        AlertDialog.Builder builder = new AlertDialog.Builder(ctx).setMessage(                msg).setCancelable(false);        return builder.setPositiveButton("确定", positivelistener)                .setNegativeButton("取消", negetivelistener).show();    }    public static void showProgessDialog(final Context ctx, String msg,            OnClickListener positivelistener, OnClickListener negetivelistener) {        // 创建一个AlertDialog.Builder对象        AlertDialog.Builder builder = new AlertDialog.Builder(ctx).setMessage(                msg).setCancelable(false);        builder.setPositiveButton("确定", positivelistener)                .setNegativeButton("取消", negetivelistener).show();    }    public static void showToast(String msg, Context context) {        Toast toast = Toast.makeText(context, msg, Toast.LENGTH_SHORT);        toast.setGravity(Gravity.CENTER, 0, 0);        toast.show();    }}