android闹钟（五）：实现闹钟功能

闹钟主页面：AlarmView.java

package com.mytest.myclock;

import java.util.Calendar;

import android.app.AlarmManager;
import android.app.AlertDialog;
import android.app.PendingIntent;
import android.app.TimePickerDialog;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.SharedPreferences;
import android.content.SharedPreferences.Editor;
import android.util.AttributeSet;
import android.view.View;
import android.widget.Adapter;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.LinearLayout;
import android.widget.ListView;
import android.widget.ShareActionProvider;
import android.widget.TimePicker;
import android.widget.Toast;

public class AlarmView extends LinearLayout {

    public AlarmView(Context context, AttributeSet attrs, int defStyle) {
        super(context, attrs, defStyle);
        // TODO Auto-generated constructor stub
    }

    public AlarmView(Context context, AttributeSet attrs) {
        super(context, attrs);
        // TODO Auto-generated constructor stub
    }

    public AlarmView(Context context) {
        super(context);
        // TODO Auto-generated constructor stub
    }

    private ListView alarmListView;
    private Button addAlarmButton;
    private ArrayAdapter<Alarm> adapter;
    private final static String KEY_ALARM_LIST = "clarm_list";
    private AlarmManager alarmManager;

    @Override
    protected void onFinishInflate() {
        super.onFinishInflate();

        alarmListView = (ListView) this.findViewById(R.id.lv_alarm);
        addAlarmButton = (Button) this.findViewById(R.id.btn_add_alarm);

        addAlarmButton.setOnClickListener(new AddAlarmOnClickListener());

        adapter = new ArrayAdapter<AlarmView.Alarm>(getContext(), android.R.layout.simple_list_item_1);
        alarmListView.setAdapter(adapter);
        alarmListView.setOnItemLongClickListener(new ClarmOnItemLongClickListener());

        readSaveCalarm();

        alarmManager = (AlarmManager) getContext().getSystemService(Context.ALARM_SERVICE);
    }

    private final class ClarmOnItemLongClickListener implements AdapterView.OnItemLongClickListener {

        @Override
        public boolean onItemLongClick(AdapterView<?> parent, View view, final int position, long id) {

            //System.out.println("onItemLongClick=================>");

            new AlertDialog.Builder(getContext()).setTitle("确认删除？").setNegativeButton("取消", null)
                    .setPositiveButton("确定", new DialogInterface.OnClickListener() {

                        @Override
                        public void onClick(DialogInterface dialog, int which) {
                            System.out.println("onItemLongClick->onClick:which:" + which);

                            removeAlarm(position);

                        }

                    }).show();

            return true;
        }

    }

    private final class AddAlarmOnClickListener implements View.OnClickListener {

        @Override
        public void onClick(View v) {
            // Toast.makeText(getContext(), "add",Toast.LENGTH_SHORT).show();
            addAlarm();
        }
    }

    private void removeAlarm(int index) {
        Alarm alarm = adapter.getItem(index);
        adapter.remove(alarm);
        saveAlarm();
        alarmManager.cancel(PendingIntent.getBroadcast(getContext(), alarm.getId(), new Intent(getContext(),AlarmReceiver.class), 0));
    }

    /**
     * 保存设置的闹钟。覆盖式的，全部重新写入，清空原有的。
     */
    private void saveAlarm() {
        Editor edit = getContext().getSharedPreferences(AlarmView.class.getName(), Context.MODE_PRIVATE).edit();
        StringBuffer alarmListStr = new StringBuffer();

        for (int i = 0; i < adapter.getCount(); i++) {
            alarmListStr.append(adapter.getItem(i).getTime()).append(",");
        }

        edit.putString(KEY_ALARM_LIST, alarmListStr.toString());
        edit.commit();
    }

    /**
     * 读取保存的闹钟
     */
    private void readSaveCalarm() {
        SharedPreferences share = getContext().getSharedPreferences(AlarmView.class.getName(), Context.MODE_PRIVATE);
        String alarmListStr = share.getString(KEY_ALARM_LIST, "");
        if (alarmListStr != null) {
            String[] alarmArr = alarmListStr.split(",");
            if (alarmArr != null) {
                for (String str : alarmArr) {
                    System.out.println("alarm:" + str);
                    if (str != null && !"".equals(str.trim())) {
                        long time = Long.valueOf(str);
                        adapter.add(new Alarm(time));
                    }
                }
            }
        }

    }

    /**
     * 添加闹钟
     */
    private void addAlarm() {
        Calendar curCal = Calendar.getInstance();

        new TimePickerDialog(getContext(), new TimePickerDialog.OnTimeSetListener() {

            @Override
            public void onTimeSet(TimePicker view, int hourOfDay, int minute) {
                Calendar alarmCal = Calendar.getInstance();
                alarmCal.set(Calendar.HOUR_OF_DAY, hourOfDay);
                alarmCal.set(Calendar.MINUTE, minute);
                alarmCal.set(Calendar.SECOND, 0);

                // 如果设置时间小于当前时间，则往后推一天。
                Calendar currentTime = Calendar.getInstance();
                if (alarmCal.getTimeInMillis() <= currentTime.getTimeInMillis()) {
                    alarmCal.setTimeInMillis(alarmCal.getTimeInMillis() + 24 * 60 * 60 * 1000);
                }

                // System.out.println(String.format("hourOfDay:%d,minute:%d",
                // hourOfDay,minute));

                // 添加到adapter，显示到列表
                Alarm alarm = new Alarm(alarmCal.getTimeInMillis());
                adapter.add(alarm);

                //每隔10分钟
                alarmManager.setRepeating(AlarmManager.RTC_WAKEUP, alarm.getTime(), 10 * 60 * 1000, PendingIntent
                        .getBroadcast(getContext(), alarm.getId(), new Intent(getContext(), AlarmReceiver.class), 0));

                // 保存到share中，下次启动再读取
                saveAlarm();
            }
        }, curCal.get(Calendar.HOUR_OF_DAY), curCal.get(Calendar.MINUTE), true).show();
    }

    private class Alarm {
        private long time = 0;
        private String timeLabel = "";
        private Calendar date;

        public Alarm(Long time) {
            this.time = time;
            Calendar cal = Calendar.getInstance();
            cal.setTimeInMillis(time);

            timeLabel = String.format("%d-%d %d:%d", cal.get(Calendar.MONTH + 1), cal.get(Calendar.DAY_OF_MONTH),
                    cal.get(Calendar.HOUR_OF_DAY), cal.get(Calendar.MINUTE));
        }

        public long getTime() {
            return time;
        }

        public String getTimeLabel() {
            return timeLabel;
        }

        public Calendar getDate() {
            return date;
        }

        public int getId() {
            return (int) (getTime() / 1000 / 60);
        }

        @Override
        public String toString() {
            return getTimeLabel();
        }

    }

}

闹钟时间到，播放音乐的activity:PlayAlarmAty.java

package com.mytest.myclock;

import android.app.Activity;
import android.media.MediaPlayer;
import android.os.Bundle;

public class PlayAlarmAty extends Activity {

    private MediaPlayer player;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.alarm_music_play);

        player = MediaPlayer.create(this, R.raw.an_angel);
        player.start();

    }

    @Override
    protected void onPause() {
        // TODO Auto-generated method stub
        super.onPause();

        finish();
    }

    @Override
    protected void onDestroy() {
        // TODO Auto-generated method stub
        super.onDestroy();
        player.stop();
        player.release();
    }
}

闹钟播放界面

<?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:orientation="vertical" >

    <TextView
        android:textAppearance="?android:attr/textAppearanceLarge"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:gravity="center"
        android:text="@string/play_sound" />

</LinearLayout>

闹钟时间到，接收处理类AlarmReceiver.java

package com.mytest.myclock;

import android.app.AlarmManager;
import android.app.PendingIntent;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;

public class AlarmReceiver extends BroadcastReceiver {

    @Override
    public void onReceive(Context context, Intent intent) {
        System.out.println("AlarmReceiver.onReceive");

        AlarmManager manager = (AlarmManager) context.getSystemService(Context.ALARM_SERVICE);

        manager.cancel(
                PendingIntent.getBroadcast(context, getResultCode(), new Intent(context, AlarmReceiver.class), 0));

        Intent it = new Intent(context, PlayAlarmAty.class);
        it.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
        context.startActivity(it);
    }

}

AndroidMainfest.xml添加配置

        <receiver android:name=".AlarmReceiver"></receiver>
         <activity android:name="PlayAlarmAty" android:screenOrientation="portrait"></activity>

另：在res中添加音乐文件。