AndroidStudio中AlertDialog的四种用法(转载)

出处：https://blog.csdn.net/qq_42183184/article/details/82534389

在此对原作者表示感谢！由于不喜欢csdn。故转载到此。

 

目录

1.默认样式

2.单选弹出框

3.多选弹出框

4.自定义弹出框

补充！！

 
1.默认样式

    android.support.v7.app.AlertDialog.Builder builder = new android.support.v7.app.AlertDialog.Builder(AlertDialogActivity.this);
    builder.setTitle("请回答");
    builder.setMessage("你觉得我好看吗？？");
    builder.setPositiveButton("当然是好看了！！", new DialogInterface.OnClickListener() {
        @Override
        public void onClick(DialogInterface dialog, int which) {
            Toast.makeText(AlertDialogActivity.this, "嘻嘻嘻",Toast.LENGTH_SHORT).show();
        }
    });
    builder.setNeutralButton("我觉得一般", new DialogInterface.OnClickListener() {
        @Override
        public void onClick(DialogInterface dialog, int which) {
            Toast.makeText(AlertDialogActivity.this,"那你再瞅瞅~",Toast.LENGTH_SHORT).show();
        }
    });
    builder.setNegativeButton("我觉得不好看", new DialogInterface.OnClickListener() {
        @Override
        public void onClick(DialogInterface dialog, int which) {
            Toast.makeText(AlertDialogActivity.this,"嘤嘤嘤",Toast.LENGTH_SHORT).show();
        }
    });
    builder.show();

 

 

 
2.单选弹出框

    final String[] gender = new String[]{"帅哥","美女"};
    android.support.v7.app.AlertDialog.Builder builder1=new android.support.v7.app.AlertDialog.Builder(AlertDialogActivity.this);
    builder1.setTitle("请选择你的性别");
    builder1.setItems(gender, new DialogInterface.OnClickListener() {
          @Override
          public void onClick(DialogInterface dialog, int which) {
                ToastUtil.showMsg(AlertDialogActivity.this,gender[which]);
          }
    });
    builder1.show();

 

    android.support.v7.app.AlertDialog.Builder builder2=new android.support.v7.app.AlertDialog.Builder(AlertDialogActivity.this);
    builder2.setTitle("你最喜欢吃一下那种菜肴：");
    final String[] dish =new String[]{"红烧牛肉","粉蒸排骨","油焖大虾","蒜蓉扇贝"};
    builder2.setSingleChoiceItems(dish, 1, new DialogInterface.OnClickListener() {
        @Override
        public void onClick(DialogInterface dialog, int which) {
            ToastUtil.showMsg(AlertDialogActivity.this,dish[which]);
             dialog.dismiss();
        }
    });
    builder2.setCancelable(false);
    builder2.show();
    break;

 

 

 
3.多选弹出框

    String[] dessert = new String[]{"抹茶千层","芒果拿破仑","草莓雪媚娘","蓝莓慕斯"};
    boolean[] begin = new boolean[]{false,false,false,false};
    android.support.v7.app.AlertDialog.Builder builder3=new android.support.v7.app.AlertDialog.Builder(AlertDialogActivity.this);
    builder3.setTitle("你吃过以下哪些甜点");
    builder3.setMultiChoiceItems(dessert, begin, new DialogInterface.OnMultiChoiceClickListener() {
        @Override
        public void onClick(DialogInterface dialog, int which, boolean isChecked) {
     
        }
    });
    builder3.setPositiveButton("确认", new DialogInterface.OnClickListener() {
        @Override
        public void onClick(DialogInterface dialog, int which) {
            ToastUtil.showMsg(AlertDialogActivity.this,"好的，我知道啦！");
     
        }
    });
    builder3.setNegativeButton("取消", new DialogInterface.OnClickListener() {
        @Override
        public void onClick(DialogInterface dialog, int which) {
            ToastUtil.showMsg(AlertDialogActivity.this,"难道你都没有吃过？？");
        }
    });
    builder3.show();
    break;

 

 

 
4.自定义弹出框

自定义Dialog的xml样式

    <?xml version="1.0" encoding="utf-8"?>
    <LinearLayout
        xmlns:android="http://schemas.android.com/apk/res/android"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:background="#fff"
        android:orientation="vertical">
     
        <TextView
            android:id="@+id/tv_title"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:gravity="center"
            android:text="提示"
            android:textSize="20sp"
            android:textColor="#000"
            android:textStyle="bold"
            android:layout_marginTop="20dp"
            />
     
        <TextView
            android:id="@+id/tv_message"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:gravity="center"
            android:text="确定要删除订单吗?"
            android:textSize="20sp"
            android:textColor="#000"
            android:layout_marginTop="20dp"
            />
     
        <View
            android:layout_width="match_parent"
            android:layout_height="0.5dp"
            android:layout_marginTop="20dp"
            android:background="#414E5E"
            />
     
        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content">
     
            <Button
                android:id="@+id/bt_cancel"
                android:layout_width="0dp"
                android:layout_weight="1"
                android:text="取消"
                android:background="@drawable/bt_dialog"
                android:textColor="#14BFB1"
                android:textSize="20sp"
                android:layout_height="wrap_content" />
     
            <View
                android:layout_width="0.5dp"
                android:background="#414E5E"
                android:layout_height="match_parent" />
            <Button
                android:id="@+id/bt_confirm"
                android:layout_width="0dp"
                android:layout_weight="1"
                android:text="确认"
                android:background="@drawable/bt_dialog"
                android:textColor="#14BFB1"
                android:textSize="20sp"
                android:layout_height="wrap_content" />
     
     
        </LinearLayout>
    </LinearLayout>

自定义Dialog组件，CustomDialog.java

    public class CustomDialog extends Dialog implements View.OnClickListener {
        //声明xml文件里的组件
        private TextView tv_title,tv_message;
        private Button bt_cancel,bt_confirm;
     
        //声明xml文件中组件中的text变量，为string类，方便之后改
        private String title,message;
        private String cancel,confirm;
     
        //声明两个点击事件，等会一定要为取消和确定这两个按钮也点击事件
        private IOnCancelListener cancelListener;
        private IOnConfirmListener confirmListener;
     
        //设置四个组件的内容
        public void setTitle(String title) {
            this.title = title;
        }
        public void setMessage(String message) {
            this.message = message;
        }
        public void setCancel(String cancel,IOnCancelListener cancelListener) {
            this.cancel = cancel;
            this.cancelListener=cancelListener;
        }
        public void setConfirm(String confirm,IOnConfirmListener confirmListener){
            this.confirm=confirm;
            this.confirmListener=confirmListener;
        }
     
        //CustomDialog类的构造方法
        public CustomDialog(@NonNull Context context) {
            super(context);
        }
        public CustomDialog(@NonNull Context context, int themeResId) {
            super(context, themeResId);
        }
     
        //在app上以对象的形式把xml里面的东西呈现出来的方法！
        @Override
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            //为了锁定app界面的东西是来自哪个xml文件
            setContentView(R.layout.custom_dialog);
     
            //设置弹窗的宽度
            WindowManager m = getWindow().getWindowManager();
            Display d = m.getDefaultDisplay();
            WindowManager.LayoutParams p =getWindow().getAttributes();
            Point size = new Point();
            d.getSize(size);
            p.width = (int)(size.x * 0.8);//是dialog的宽度为app界面的80%
            getWindow().setAttributes(p);
     
            //找到组件
            tv_title=findViewById(R.id.tv_title);
            tv_message=findViewById(R.id.tv_message);
            bt_cancel=findViewById(R.id.bt_cancel);
            bt_confirm=findViewById(R.id.bt_confirm);
     
            //设置组件对象的text参数
            if (!TextUtils.isEmpty(title)){
                tv_title.setText(title);
            }
            if (!TextUtils.isEmpty(message)){
                tv_message.setText(message);
            }
            if (!TextUtils.isEmpty(cancel)){
                bt_cancel.setText(cancel);
            }
     
            //为两个按钮添加点击事件
            bt_confirm.setOnClickListener(this);
            bt_cancel.setOnClickListener(this);
         }
     
         //重写onClick方法
        public void onClick(View view) {
            switch (view.getId()){
                case R.id.bt_cancel:
                    if(cancelListener!=null){
                        cancelListener.onCancel(this);
                    }
                    dismiss();
                    break;
                case R.id.bt_confirm:
                    if(confirmListener!=null){
                        confirmListener.onConfirm(this);
                    }
                    dismiss();//按钮按之后会消失
                    break;
            }
        }
     
        //写两个接口，当要创建一个CustomDialog对象的时候，必须要实现这两个接口
        //也就是说，当要弹出一个自定义dialog的时候，取消和确定这两个按钮的点击事件，一定要重写！
        public interface IOnCancelListener{
            void onCancel(CustomDialog dialog);
        }
        public interface IOnConfirmListener{
            void onConfirm(CustomDialog dialog);
        }
    }

使用自定义的弹出框组件

    CustomDialog customDialog = new CustomDialog(CustomDialogActivity.this);
    customDialog.setTitle("提醒");
    customDialog.setMessage("你确定要删除吗?");
    customDialog.setCancel("cancel", new CustomDialog.IOnCancelListener() {
        @Override
        public void onCancel(CustomDialog dialog) {
            Toast.makeText(CustomDialogActivity.this, "取消成功！",Toast.LENGTH_SHORT).show();
        }
    });
    customDialog.setConfirm("confirm", new CustomDialog.IOnConfirmListener(){
        @Override
        public void onConfirm(CustomDialog dialog) {
            Toast.makeText(CustomDialogActivity.this, "确认成功！",Toast.LENGTH_SHORT).show();
        }
    });
    customDialog.show();

 

 

 

以上代码中用到的ToastUtil类，是我自定义的一个类，目的是把Toast的使用稍微封装一下，偷一下懒。代码如下：

    public class ToastUtil {
        public static Toast toast;
        public static void showMsg(Context context,String msg){
            if(toast==null){
                toast=Toast.makeText(context,msg,Toast.LENGTH_LONG);
            }else{
                toast.setText(msg);
            }
            toast.show();
        }
    }