在tap的碎片上与活动进行绑定实现点击事件（日期时间选择以及按钮跳转时间）

package com.example.wenandroidcheck11;
import android.app.AlertDialog;
import android.content.DialogInterface;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.DatePicker;
import android.widget.LinearLayout;
import android.widget.TextView;
import android.widget.TimePicker;
import androidx.annotation.Nullable;
import androidx.fragment.app.Fragment;
import java.util.Calendar;

public class WeixinFragment extends Fragment implements  View.OnClickListener, DatePicker.OnDateChangedListener, TimePicker.OnTimeChangedListener {
    private LinearLayout llDate, llTime;
    private TextView tvDate, tvTime;
    private int year, month, day, hour, minute;
    //在TextView上显示的字符
    private StringBuffer date, time;

    @Nullable
    @Override
    public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
        View view = inflater.inflate(R.layout.tab1, container, false);
        llDate = (LinearLayout) view.findViewById(R.id.ll_date);
        tvDate = (TextView) view.findViewById(R.id.tv_date);
        llTime = (LinearLayout)  view.findViewById(R.id.ll_time);
        tvTime = (TextView)view.findViewById(R.id.tv_time);
        llDate.setOnClickListener(this);
        llTime.setOnClickListener(this);
        date = new StringBuffer();
        time = new StringBuffer();
        initDateTime();
        return view;
    }


    /**
     * 获取当前的日期和时间
     */
    private void initDateTime() {
        Calendar calendar = Calendar.getInstance();
        year = calendar.get(Calendar.YEAR);
        month = calendar.get(Calendar.MONTH)+1;
        day = calendar.get(Calendar.DAY_OF_MONTH);
        hour = calendar.get(Calendar.HOUR);
        minute = calendar.get(Calendar.MINUTE);

    }
      @Override
        public void onClick (View v){
            switch (v.getId()) {
                case R.id.ll_date:
                    AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());
                    builder.setPositiveButton("设置", new DialogInterface.OnClickListener() {
                        @Override
                        public void onClick(DialogInterface dialog, int which) {
                            if (date.length() > 0) { //清除上次记录的日期
                                date.delete(0, date.length());
                            }
                            month += 1;
                            tvDate.setText(date.append(String.valueOf(year)).append("年").append(String.valueOf(month)).append("月").append(day).append("日"));
                            dialog.dismiss();//取消对话框的作用
                        }
                    });
                    builder.setNegativeButton("取消", new DialogInterface.OnClickListener() {
                        @Override
                        public void onClick(DialogInterface dialog, int which) {
                            dialog.dismiss();
                        }
                    });
                    final AlertDialog dialog = builder.create();//创建对话框
                    View dialogView = View.inflate(getActivity(), R.layout.dialog_date, null);
                    /*这个方法可以得到view,但是对view中设置居中等什么属性都是无效的，还有就是设置的宽度也是无效的，默认只能是wrap*/
                    final DatePicker datePicker = (DatePicker) dialogView.findViewById(R.id.datePicker);

                    dialog.setTitle("设置日期");
                    dialog.setView(dialogView);//可以通过自定义一个View，设计成自己想要的不同的dialog，(会话)
                    dialog.show();//显示对话框
                    //初始化日期监听事件
                    datePicker.init(year, month - 1, day, this);
                    break;
                case R.id.ll_time:
                    AlertDialog.Builder builder2 = new AlertDialog.Builder(getActivity());
                    builder2.setPositiveButton("设置", new DialogInterface.OnClickListener() {
                        @Override
                        public void onClick(DialogInterface dialog, int which) {
                            if (time.length() > 0) { //清除上次记录的日期
                                time.delete(0, time.length());
                            }
                            tvTime.setText(time.append(String.valueOf(hour)).append("时").append(String.valueOf(minute)).append("分"));
                            dialog.dismiss();
                        }
                    });
                    builder2.setNegativeButton("取消", new DialogInterface.OnClickListener() {
                        @Override
                        public void onClick(DialogInterface dialog, int which) {
                            dialog.dismiss();
                        }
                    });
                    AlertDialog dialog2 = builder2.create();
                    View dialogView2 = View.inflate(getActivity(), R.layout.dialog_time, null);

                    TimePicker timePicker = (TimePicker) dialogView2.findViewById(R.id.timePicker);
                    timePicker.setCurrentHour(hour);
                    timePicker.setCurrentMinute(minute);
                    timePicker.setIs24HourView(true); //设置24小时制

                    timePicker.setOnTimeChangedListener(this);
                    dialog2.setTitle("设置时间");
                    dialog2.setView(dialogView2);
                    dialog2.show();
                    break;
            }
            /**
             * 日期改变的监听事件
             *
             * @param view
             * @param year
             * @param monthOfYear
             * @param dayOfMonth
             */

        }

        @Override
        public void onDateChanged (DatePicker view,int year, int monthOfYear, int dayOfMonth){
            this.year = year;
            this.month = monthOfYear;
            this.day = dayOfMonth;
        }
        /**
         * 时间改变的监听事件
         *
         * @param view
         * @param hourOfDay
         * @param minute
         */
        @Override
        public void onTimeChanged (TimePicker view,int hourOfDay, int minute){
            this.hour = hourOfDay;
            this.minute = minute;
        }

}

package com.example.wenandroidcheck11;

import android.content.Intent;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import androidx.annotation.Nullable;
import androidx.fragment.app.Fragment;

public class FrdFragment extends Fragment implements View.OnClickListener{
    private Button btn_register;
    @Nullable
    @Override
    public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
        View view = inflater.inflate(R.layout.tab2, container, false);
        btn_register =(Button) view.findViewById(R.id.button_register);
        btn_register.setOnClickListener(this);
        return view;
    }
    @Override
    public void onClick(View view){
        //String text = "csdnicjbsndicnsdicnsojdn";
        //Toast.makeText(MainActivity.this, text, Toast.LENGTH_SHORT).show();
        Intent intent = new Intent(getActivity(),RegisterActivity1.class);
        startActivity(intent);

    }
}