Android提醒：Dialog，Toast，Snackbar

妖狐艹你老母 2022-07-15 14:52 221阅读 0赞

参考：[http://blog.csdn.net/sinyu890807/article/details/51336415][http_blog.csdn.net_sinyu890807_article_details_51336415]

# Dialog #

## 1、确定取消对话框 ##

![这里写图片描述][20151021212943123]

AlertDialog dialog = new AlertDialog.Builder(this)
            .setMessage("若练此功，必先自宫")
            .setTitle("警告")
            .setIcon(R.mipmap.ic_launcher)
            .setPositiveButton("ok", new DialogInterface.OnClickListener() {
                @Override
                public void onClick(DialogInterface dialog, int which) {
    
                }
            })
            .setNegativeButton("cancel", new DialogInterface.OnClickListener() {
                @Override
                public void onClick(DialogInterface dialog, int which) {
    
                }
            })
            .create();
    dialog.show();

## 2、单选对话框 ##

![这里写图片描述][20151021214655698]

AlertDialog.Builder builder = new Builder(this);
            builder.setTitle("选择你的性别");
            //定义单选选项
            final String[] items = new String[]{
       "男", "女", "其他"};
            //-1表示没有默认选择
            //点击侦听的导包要注意别导错
            builder.setSingleChoiceItems(items, -1, new OnClickListener() {
    
                //which表示点击的是哪一个选项
                @Override
                public void onClick(DialogInterface dialog, int which) {
                    Toast.makeText(MainActivity.this, "您选择了" + items[which], 0).show();
                    //对话框消失
                    dialog.dismiss();
                }
            });
    
            builder.show();

## 3、多选对话框 ##

![这里写图片描述][20151022074118392]

AlertDialog.Builder builder = new Builder(this);
            builder.setTitle("请选择你认为最帅的人");
            //定义多选的选项，因为可以多选，所以需要一个boolean数组来记录哪些选项被选了
            final String[] items = new String[]{
                    "赵帅哥",
                    "赵师哥",
                    "赵老师",
                    "侃哥"
            };
            //true表示对应位置的选项被选了
            final boolean[] checkedItems = new boolean[]{
                    true,
                    false,
                    false,
                    false,
            };
            builder.setMultiChoiceItems(items, checkedItems, new OnMultiChoiceClickListener() {
    
                //点击某个选项，如果该选项之前没被选择，那么此时isChecked的值为true
                @Override
                public void onClick(DialogInterface dialog, int which, boolean isChecked) {
                    checkedItems[which] = isChecked;
                }
            });
    
            builder.setPositiveButton("确定", new OnClickListener() {
    
                @Override
                public void onClick(DialogInterface dialog, int which) {
                    StringBuffer sb = new StringBuffer();
                    for(int i = 0;i < items.length; i++){
                        sb.append(checkedItems[i] ? items[i] + " " : "");
                    }
                    Toast.makeText(MainActivity.this, sb.toString(), 0).show();
                }
            });
            builder.show();

## 兼容旧版本 ##

android.support.v7.app.AlertDialog

# Toast #

Toast.makeText(context,"hello,are you ok ?",Toast.LENGTH_LONG).show();

public class Util { 
    
        private static Toast toast;
    
        public static void showToast(Context context, 
            String content) {
            if (toast == null) {
                toast = Toast.makeText(context,
                             content, 
                             Toast.LENGTH_SHORT);
            } else {
                toast.setText(content);
            }
            toast.show();
        }
    
    }

<table> 
 <thead> 
  <tr> 
   <th>方法</th> 
   <th>功能描述</th> 
  </tr> 
 </thead> 
 <tbody> 
  <tr> 
   <td>Toast.LENGTH_SHORT</td> 
   <td>短时间的土司</td> 
  </tr> 
  <tr> 
   <td>Toast.LENGTH_LONG</td> 
   <td>长时间的土司</td> 
  </tr> 
  <tr> 
   <td>makeText()</td> 
   <td>设置土司的内容</td> 
  </tr> 
  <tr> 
   <td>show()</td> 
   <td>弹出土司</td> 
  </tr> 
  <tr> 
   <td>setGravity()</td> 
   <td>设置重心</td> 
  </tr> 
  <tr> 
   <td>setView()</td> 
   <td>自定义土司布局</td> 
  </tr> 
  <tr> 
   <td>setDuration()</td> 
   <td>持续时间</td> 
  </tr> 
 </tbody> 
</table>

# Snackbar #

![这里写图片描述][20160717191403222]

Snackbar.make(view, "data deleted",Snackbar.LENGTH_LONG)
            .setAction("Undo", new View.OnClickListener(){
                    @Override
                    public void onClick(View v) {
                    }
                })
            .show();

[http_blog.csdn.net_sinyu890807_article_details_51336415]: http://blog.csdn.net/sinyu890807/article/details/51336415
[20151021212943123]: /images/20220715/6582bd3e89674fd185a57298812fe7dd.png
[20151021214655698]: /images/20220715/6a730c2361b749aeb4ccf8e5bbda26ed.png
[20151022074118392]: /images/20220715/1ecbe952c63b4b4ea9dbb2ab5a99318f.png
[20160717191403222]: /images/20220715/9185f2c745d24f38acb172dcc3669804.png