安卓作业—-慕课移动应用开发作业18之运用AlarmManager和PendingIntent实现简单闹钟移动开发baidu41860619的博客-

本篇通过AlarmManager和PendingIntent实现定时提醒功能，界面运用Button、TextView、Switch进行布局

同时这也是中国大学慕课移动终端应用开发的网课作业18，我会持续更新我的作业，如果有需要关注一下吧

说明

具体的组件介绍请点击上面链接，观看课程内详细信息，这里不多赘述，只贴我实现的代码。

界面展示

代码部分

代码包括时间设置Activity—TimePickerActivity和其对应布局以及闹钟Activity—MyClockActivity

1.先在AndroidManifest.xml中设置权限

同时记得注册Activity

 <uses-permission android:name="android.permission.VIBRATE" /> 

2.TimePickerActivity.java

public class TimePickerActivity extends AppCompatActivity { private Button mButtonChooseTime,mButtonStart,mButtonCancel; private TextView mTextView; private Switch mSwitch; private boolean flag = false;//是否应该震动 private PendingIntent mPendingIntent; private AlarmManager mAlarmManager; private Intent mIntent; private int requestCode = 0; private Calendar mCalendar; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_time_picker); init();          mButtonChooseTime.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { //用于存放当前时间                 Calendar currentTime = Calendar.getInstance(); new TimePickerDialog(TimePickerActivity.this, new TimePickerDialog.OnTimeSetListener() { @Override public void onTimeSet(TimePicker view, int hourOfDay, int minute) {                         mCalendar = Calendar.getInstance(); long systemTime = System.currentTimeMillis();//取出当前的时间毫秒值                         mCalendar.set(Calendar.HOUR,hourOfDay);                         mCalendar.set(Calendar.MINUTE,minute);                         mCalendar.set(Calendar.SECOND,0);                         mCalendar.set(Calendar.MILLISECOND,0); long setTime = mCalendar.getTimeInMillis(); if (systemTime>setTime){                             mCalendar.add(Calendar.DAY_OF_MONTH,1); }                          mTextView.setText("您选择了"+hourOfDay+"时"+minute+"分"); } }, currentTime.get(Calendar.HOUR_OF_DAY), currentTime.get(Calendar.MINUTE), false).show(); } });          mButtonStart.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) {                  mAlarmManager = (AlarmManager) getSystemService(ALARM_SERVICE);                 mIntent = MyClockActivity.createIntent(TimePickerActivity.this,flag);                 mPendingIntent = PendingIntent.getActivity(TimePickerActivity.this,requestCode,mIntent,PendingIntent.FLAG_UPDATE_CURRENT); //设置闹铃                 mAlarmManager.setExact(AlarmManager.RTC,mCalendar.getTimeInMillis(),mPendingIntent);                 mButtonStart.setEnabled(false);                 mButtonCancel.setEnabled(true); } });          mButtonCancel.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) {                 mAlarmManager.cancel(mPendingIntent);                 mButtonStart.setEnabled(true);                 mButtonCancel.setEnabled(false); } });          mSwitch.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener(){ @Override public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {                 flag = isChecked;                 mButtonStart.setEnabled(true);                 mButtonCancel.setEnabled(false); } }); } private void init(){         mButtonChooseTime = findViewById(R.id.time_picker_button_choose_time);         mButtonStart = findViewById(R.id.time_picker_button_start);         mButtonCancel = findViewById(R.id.time_picker_button_cancel);         mTextView = findViewById(R.id.time_picker_text_show_info);         mSwitch = findViewById(R.id.time_picker_switch_choose);         mButtonStart.setEnabled(false);         mButtonCancel.setEnabled(false); } } 

2.activity_time_picker.xml

<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="https://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical"> <TextView android:id="@+id/time_picker_text_show_info" android:layout_gravity="center" android:layout_marginTop="30dp" android:textSize="20dp" android:layout_width="wrap_content" android:layout_height="wrap_content"/> <Button android:id="@+id/time_picker_button_choose_time" android:layout_gravity="center" android:layout_marginTop="30dp" android:text="选择时间" android:layout_width="wrap_content" android:layout_height="wrap_content"/> <LinearLayout android:layout_gravity="center" android:layout_marginTop="30dp" android:layout_width="wrap_content" android:layout_height="wrap_content" android:orientation="horizontal"> <TextView android:text="是否震动  " android:textSize="20dp" android:layout_width="wrap_content" android:layout_height="wrap_content"/> <Switch android:id="@+id/time_picker_switch_choose" android:layout_width="wrap_content" android:layout_height="wrap_content"/> </LinearLayout> <Button android:layout_gravity="center" android:layout_marginTop="30dp" android:id="@+id/time_picker_button_start" android:text="开启定时" android:layout_width="wrap_content" android:layout_height="wrap_content"/> <Button android:layout_gravity="center" android:layout_marginTop="30dp" android:id="@+id/time_picker_button_cancel" android:text="取消定时" android:layout_width="wrap_content" android:layout_height="wrap_content"/> </LinearLayout> 

3.MyClockActivity.java

public class MyClockActivity extends AppCompatActivity { private MediaPlayer mMediaPlayer; private boolean flag; private Vibrator mVibrator; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_my_clock); //获取传递过来的信息         flag = getIntent().getBooleanExtra("flag",false);          mMediaPlayer = MediaPlayer.create(this,R.raw.music);         mMediaPlayer.start(); //        弹出一个闹钟提醒对话框---关闭闹钟，让播放闹钟的media play停止播放声音 new AlertDialog.Builder(this) .setTitle("闹钟") .setMessage("时间到了") .setPositiveButton("关闭闹钟", new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) {                         mMediaPlayer.stop(); if (flag){                             mVibrator.cancel(); }                         MyClockActivity.this.finish(); } }).show(); if (flag){ //震动             mVibrator = (Vibrator) MyClockActivity.this.getSystemService(MyClockActivity.VIBRATOR_SERVICE); long [] patter = {1000, 1000, 2000, 50};             mVibrator.vibrate(patter, 0); } } public static Intent createIntent(Context context,boolean flag){         Intent intent = new Intent(context,MyClockActivity.class);         intent.putExtra("flag",flag); return intent; } } 

铃声资源

在res下新建一个raw文件夹，将音频文件放入，命名为music.xxx

总结

如果有什么问题，请私信联系我或者在评论区留言
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