3/17每日总结

所花时间：3小时

代码量：如下：

博客量：本学期截至目前23篇

了解到的知识点：app打卡

经过几天的努力，在今天上交了app作业和增删改查的java web 在接下来还会完成这个团队项目的地铁的功能。

闹钟功能：

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package com.example.riji; import androidx.appcompat.app.AlertDialog; import androidx.appcompat.app.AppCompatActivity;   import android.content.DialogInterface; import android.content.Intent; import android.os.Bundle;   public class Alarm extends AppCompatActivity {     @Override     public void onCreate(Bundle savedInstanceState) {         super.onCreate(savedInstanceState);         setContentView(R.layout.activity_alarm);         Intent intent=new Intent();         intent=getIntent();         String nao = intent.getStringExtra("nao");         //创建一个闹钟提醒的对话框,点击确定关闭铃声与页面         new AlertDialog.Builder(Alarm.this).setTitle("闹钟").setMessage(nao)                 .setPositiveButton("关闭闹铃", new DialogInterface.OnClickListener() {                     @Override                     public void onClick(DialogInterface dialog, int which) {                         Alarm.this.finish();                     }                 }).show();     }         }

　　

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package com.example.riji; import androidx.appcompat.app.AppCompatActivity; import android.app.TimePickerDialog; import android.content.Intent; import android.os.Bundle; import android.util.Log; import android.view.View; import android.widget.Button; import android.widget.TimePicker; import android.widget.Toast; import java.util.Calendar; import java.util.Timer; import java.util.TimerTask; public class AlarmReceiver extends AppCompatActivity implements View.OnClickListener {     private Button btn_set;     private Button btn_cancel;     private Timer timer;     private TimerTask timerTask;     @Override     protected void onCreate(Bundle savedInstanceState) {         super.onCreate(savedInstanceState);         setContentView(R.layout.activity_res_alarm);         timer=new Timer();         bindViews();     }     private void bindViews() {         btn_set = (Button) findViewById(R.id.btn_set);         btn_cancel = (Button) findViewById(R.id.btn_cancel);         btn_set.setOnClickListener(this);         btn_cancel.setOnClickListener(this);       }     @Override     public void onClick(View v) {         switch (v.getId()){             case R.id.btn_set:                 timerTask = new TimerTask() {                     @Override                     public void run() {                         Intent intent = new Intent(AlarmReceiver.this, Alarm.class);                         intent.putExtra("nao","到了打卡时间了哦");                         startActivity(intent);                     }                 };                 Calendar currentTime = Calendar.getInstance();                 new TimePickerDialog(AlarmReceiver.this, 0,                         new TimePickerDialog.OnTimeSetListener() {                             @Override                             public void onTimeSet(TimePicker view,                                                   int hourOfDay, int minute) {                                 //设置当前时间                                 Calendar c = Calendar.getInstance();                                 c.setTimeInMillis(System.currentTimeMillis());                                 // 根据用户选择的时间来设置Calendar对象                                 c.set(Calendar.HOUR, hourOfDay);                                 c.set(Calendar.MINUTE, minute);                                 timer.schedule(timerTask,c.getTimeInMillis()-currentTime.getTimeInMillis(),1000000);                                 Log.e("HEHE",c.getTimeInMillis()+"");   //这里的时间是一个unix时间戳                                 // 提示闹钟设置完毕:                                 Toast.makeText(AlarmReceiver.this, "闹钟设置完毕~"+ c.getTimeInMillis(),                                         Toast.LENGTH_SHORT).show();                             }                         }, currentTime.get(Calendar.HOUR_OF_DAY), currentTime                         .get(Calendar.MINUTE), true).show();                 btn_cancel.setVisibility(View.VISIBLE);                 break;             case R.id.btn_cancel:                 timer.cancel();                 btn_cancel.setVisibility(View.GONE);                 Toast.makeText(AlarmReceiver.this, "闹钟已取消", Toast.LENGTH_SHORT)                         .show();                 break;         }     } }

　　xml：

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<?xml version="1.0" encoding="utf-8"?> <androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"     xmlns:app="http://schemas.android.com/apk/res-auto"     xmlns:tools="http://schemas.android.com/tools"     android:layout_width="match_parent"     android:layout_height="match_parent"     tools:context=".Alarm">   </androidx.constraintlayout.widget.ConstraintLayout>

　　

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<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"     android:id="@+id/LinearLayout1"     android:layout_width="match_parent"     android:layout_height="match_parent"     android:orientation="vertical">     <Button         android:id="@+id/btn_set"         android:layout_width="match_parent"         android:layout_height="wrap_content"         android:layout_gravity="center"         android:layout_marginTop="250dp"         android:text="设置闹钟" />     <Button         android:id="@+id/btn_cancel"         android:layout_width="match_parent"         android:layout_height="wrap_content"         android:text="关闭闹钟"         android:visibility="gone" />   </LinearLayout>