简介

此次讲解Android应用中最常见的功能——对话框（Dialog），包括普通对话框、单选对话框以及多选对话框的实现

正文

因为手机没有录屏工具，就没有弄成动态图，直接截图喽

<img src="http://upload-images.jianshu.io/upload_images/2306667-0624966446746f7b.jpg?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240" width="100" height="200">

• 创建对话框构建器对象
  AlertDialog.Builder builder = new Builder(this);

• 设置图标、标题和正文
  builder.setIcon(R.mipmap.ic_launcher);
  builder.setTitle("史上最帅的男人");
  builder.setMessage("徐大爷徐大爷徐大爷徐大爷徐大爷徐大爷");

• 设置确定和取消按钮
  builder.setPositiveButton("确定", new OnClickListener() {
  @Override
  public void onClick(DialogInterface dialogInterface, int i) {
  Toast.makeText(MainActivity.this,"感谢同意，祝你找到好工作！",Toast.LENGTH_LONG).show();
  dialogInterface.dismiss();
  }
  });
  builder.setNegativeButton("取消", new OnClickListener() {
  @Override
  public void onClick(DialogInterface dialogInterface, int i) {
  Toast.makeText(MainActivity.this,"不同意的人工资都特别低！特别低！特别低！",Toast.LENGTH_SHORT).show();
  //对话框消失
  dialogInterface.dismiss();
  }
  });
  builder.show();

<img src="http://upload-images.jianshu.io/upload_images/2306667-996cb6a59332f66f.jpg?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240" width="100" height="200">

单选框

核心代码

public void click2(View view){
    AlertDialog.Builder builder=new AlertDialog.Builder(this);
    builder.setIcon(R.mipmap.ic_launcher);
    builder.setTitle("你认为自己属于什么性别");
    final String[] items = new String[]{
            "男",
            "女",
            "程序员",
            "女博士"
    };
    builder.setSingleChoiceItems(items, -1, new OnClickListener() {
        //i:用户所选条目的下标
        //dialogInterface:触发这个方法的对话框
        @Override
        public void onClick(DialogInterface dialogInterface, int i) {

        }
    });
    builder.setPositiveButton("确定", new OnClickListener() {
        @Override
        public void onClick(DialogInterface dialogInterface, int i) {
            Toast.makeText(MainActivity.this,"您选择的是："+items[i],Toast.LENGTH_SHORT).show();

            dialogInterface.dismiss();
        }
    });
    builder.setNegativeButton("取消", new OnClickListener() {
        @Override
        public void onClick(DialogInterface dialogInterface, int i) {
            Toast.makeText(MainActivity.this,"卧槽，你是什么物种？",Toast.LENGTH_SHORT).show();
            dialogInterface.dismiss();
        }
    });
    //展现对话框
    builder.show();
}

<img src="http://upload-images.jianshu.io/upload_images/2306667-2d6c9d8c3563c3c7.jpg?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240" width="100" height="200">

多选框

核心代码

public void click3(View view){
    AlertDialog.Builder builder=new AlertDialog.Builder(this);
    builder.setIcon(R.mipmap.ic_launcher);
    builder.setTitle("请选择你认为最帅的人");
    final String[] items=new String[]{
            "Trap_余生",
            "徐大爷",
            "徐大哥",
            "晨哥",
            "晨爷"
    };
    final boolean[] checkedItems=new boolean[]{
            true,true,true,true,true
    };

    builder.setMultiChoiceItems(items, checkedItems, new OnMultiChoiceClickListener() {
        //b:用户是选中该条目还是取消该条目
        @Override
        public void onClick(DialogInterface dialogInterface, int i, boolean b) {
            checkedItems[i]=b;

        }
    });
    //设置一个确定按钮
    builder.setPositiveButton("确定", new OnClickListener() {
        @Override
        public void onClick(DialogInterface dialogInterface, int i) {
            String text="";
            for (int j=0;j<items.length;j++){
                text +=checkedItems[j]?items[j]+",":"";
            }
            Toast.makeText(MainActivity.this,text,Toast.LENGTH_SHORT).show();
            dialogInterface.dismiss();

        }
    });
    builder.show();


}

分享

Android五大存储之SQLite
Android五大存储之SharedPreference
Android五大存储之外部存储
Android五大存储之内部存储

CSDN：http://write.blog.csdn.net/postlist
github: https://github.com/ITtrap

• 欢迎网友互相交流
  QQ: 2632545852
  Email: xuchen1009@gmail.com