android 闹钟的简单实现

缺乏、安全感 2022-09-25 04:16 171阅读 0赞

private AlarmManager am;
    private Intent alarmIntent;
    private PendingIntent alarm_pi;
    private MediaPlayer mp;
    
    am = (AlarmManager) getSystemService(ALARM_SERVICE);
    alarmIntent = new Intent(MainActivity.this,ClockReceiver.class);
    alarm_pi = PendingIntent.getBroadcast(MainActivity.this, 0, alarmIntent, 0);
    
    
    Calendar c = Calendar.getInstance();
    c.setTimeInMillis(System.currentTimeMillis());
    am.setExact(AlarmManager.RTC_WAKEUP, c.getTimeInMillis(), alarm_pi);//设定当前时间触发闹钟

闹钟触发Receiver

package com.example.an_hour;
    
    import android.app.AlertDialog;
    import android.content.BroadcastReceiver;
    import android.content.Context;
    import android.content.DialogInterface;
    import android.content.Intent;
    import android.media.MediaPlayer;
    
    public class ClockReceiver extends BroadcastReceiver {
    
    	@Override
    	public void onReceive(Context context, Intent intent) {
    		Intent i = new Intent(context, AlarmDialog.class);
    		i.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
    		context.startActivity(i);
    	}
    
    }

receiver接收到alarm信息，打开

AlarmDialog activity

弹出dialog，播放MP3音乐

package com.example.an_hour;
    
    import java.io.IOException;
    import java.text.SimpleDateFormat;
    import java.util.Calendar;
    
    import android.app.Activity;
    import android.app.AlertDialog;
    import android.content.DialogInterface;
    import android.content.Intent;
    import android.media.AudioManager;
    import android.media.MediaPlayer;
    import android.media.MediaRecorder.AudioSource;
    import android.net.Uri;
    import android.os.Bundle;
    import android.view.KeyEvent;
    
    public class AlarmDialog extends Activity {
    	private MediaPlayer mp;
    	private String time;
    	private Calendar calendar;
    
    	@Override
    	protected void onCreate(Bundle savedInstanceState) {
    		super.onCreate(savedInstanceState);
    		setContentView(R.layout.dialog_layout);
    		playMusic();
    		showAlarmDialog();
    	}
    
    			private void showAlarmDialog() {
    				calendar = Calendar.getInstance();
    				SimpleDateFormat sdf1 = new SimpleDateFormat("yyyy,MM,dd,EEEE,HH:mm:ss");
    		        time = sdf1.format(calendar.getTime());
    				AlertDialog.Builder builder = new AlertDialog.Builder(this)
    									.setMessage("now is:"+time)
    									.setTitle("正点时间到了")
    									.setCancelable(true)
    									.setPositiveButton("OK", new DialogInterface.OnClickListener() {
    										
    										@Override
    										public void onClick(DialogInterface dialog, int which) {
    											mp.stop();
    											mp.release();
    											dialog.dismiss();
    											AlarmDialog.this.finish();
    										}
    									});
    				AlertDialog dialog = builder.create();
    				dialog.show();
    				
    			}
    		    
    			private void playMusic() {
    				//mp = MediaPlayer.create(this, R.raw.a);
    				Uri uri = Uri.parse("/storage/sdcard1/kgmusic/download/Claris - 魔法少女小圆.mp3");
    				mp = new MediaPlayer();
    				mp.setAudioStreamType(AudioManager.STREAM_MUSIC);
    				try {
    					mp.setDataSource(AlarmDialog.this,uri);
    					mp.prepare();
    				} catch (IllegalArgumentException e) {
    					e.printStackTrace();
    				} catch (SecurityException e) {
    					e.printStackTrace();
    				} catch (IllegalStateException e) {
    					e.printStackTrace();
    				} catch (IOException e) {
    					e.printStackTrace();
    				}
    				
    				mp.start();
    			}
    
    			@Override
    			public boolean onKeyDown(int keyCode, KeyEvent event) {
    				if (keyCode == KeyEvent.KEYCODE_BACK) {
    					Intent intent = new Intent(this,MainActivity.class);
    					startActivity(intent);
    				}
    				return super.onKeyDown(keyCode, event);
    			}
    }

PS:播放本地音乐，需添加权限：

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