AlarmManager 定时提醒
之前写了一个AlarmManager+Service的轮询Demo，今天写个AlarmManager的新用法，定时器，说白了就是设置一个闹钟。
原理：设置一个定时器，到了定是时间，系统会发出广播，我们自己接收处理就OK了。
Demo：http://download.csdn.net/detail/hello_12413/8876463
效果图：
以下是代码部分：
MainActivity.java:
package com.example.alarmreceiverdemo;
import java.util.Calendar;
import android.app.Activity;
import android.app.AlarmManager;
import android.app.DatePickerDialog;
import android.app.DatePickerDialog.OnDateSetListener;
import android.app.PendingIntent;
import android.app.TimePickerDialog;
import android.app.TimePickerDialog.OnTimeSetListener;
import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.os.Handler;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.DatePicker;
import android.widget.TextView;
import android.widget.TimePicker;
import android.widget.Toast;
import com.example.alarmreceiverdemo.utils.DateFormatUtils;
public class MainActivity extends Activity implements OnClickListener {
private Button setting;
private TextView time;
private TextView curTime;
private StringBuilder builder;
private PendingIntent mTimedMessagePendingIntent = null;
private AlarmManager mAlarmManager;
private int timedYear;
private int timedMonth;
private int timedDay;
private int timedHour;
private int timedMinute;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mAlarmManager = (AlarmManager) getSystemService(Context.ALARM_SERVICE);
setting = (Button) findViewById(R.id.setting);
time = (TextView) findViewById(R.id.time);
curTime = (TextView) findViewById(R.id.cur);
builder = new StringBuilder();
setting.setOnClickListener(this);
handler.sendEmptyMessage(0);
}
// 发送定时任务
private void sendTimedMessage() {
Intent intent = new Intent(this, AlarmReceiver.class);
intent.setAction("alarmBroadcastReceiverAction");
mTimedMessagePendingIntent = PendingIntent.getBroadcast(this, 0, intent, 0);
// 设置定时时间
Calendar calendar = Calendar.getInstance();
calendar.set(Calendar.YEAR, timedYear);
calendar.set(Calendar.MONTH, timedMonth);
calendar.set(Calendar.DAY_OF_MONTH, timedDay);
calendar.set(Calendar.HOUR_OF_DAY, timedHour);
calendar.set(Calendar.MINUTE, timedMinute);
if (calendar.getTimeInMillis() <= System.currentTimeMillis()) {
Toast.makeText(this, "请重新设置时间", Toast.LENGTH_SHORT).show();
} else {
Toast.makeText(this, "成功设置定时时间", Toast.LENGTH_SHORT).show();
mAlarmManager.set(AlarmManager.RTC, calendar.getTimeInMillis(), mTimedMessagePendingIntent);
}
}
Handler handler = new Handler() {
public void handleMessage(android.os.Message msg) {
curTime.setText(DateFormatUtils.getTime());
handler.sendEmptyMessageDelayed(0, 1 * 1000);
};
};
// 日期选择器监听器
OnDateSetListener dateSetListener = new OnDateSetListener() {
@Override
public void onDateSet(DatePicker view, int year, int monthOfYear, int dayOfMonth) {
timedYear = year;
timedMonth = monthOfYear;
timedDay = dayOfMonth;
builder.append(year);
builder.append("-");
builder.append(monthOfYear < 10 ? ("0" + monthOfYear) : monthOfYear);
builder.append("-");
builder.append(dayOfMonth < 10 ? ("0" + dayOfMonth) : dayOfMonth);
builder.append("\t");
showTimeDialog();
}
};
// 时间选择器监听器
// 时间选择器监听器
OnTimeSetListener timeSetListener = new OnTimeSetListener() {
@Override
public void onTimeSet(TimePicker view, int hourOfDay, int minute) {
timedHour = hourOfDay;
timedMinute = minute;
builder.append(hourOfDay < 10 ? ("0" + hourOfDay) : hourOfDay);
builder.append(":");
builder.append(minute < 10 ? ("0" + minute) : minute);
time.setText(builder.toString());
sendTimedMessage();
}
};
// 显示日期选择器
private void showDataDialog() {
Calendar c = Calendar.getInstance();
DatePickerDialog datePickerDialog = new DatePickerDialog(this, dateSetListener, c.get(Calendar.YEAR), c.get(Calendar.MONTH), c.get(Calendar.DAY_OF_MONTH));
datePickerDialog.show();
}
// 显示时间选择器
public void showTimeDialog() {
Calendar c = Calendar.getInstance();
TimePickerDialog timePickerDialog = new TimePickerDialog(this, timeSetListener, c.get(Calendar.HOUR_OF_DAY), c.get(Calendar.MINUTE), true);
timePickerDialog.show();
}
@Override
public void onClick(View v) {
switch (v.getId()) {
case R.id.setting:
builder.delete(0, builder.length());
showDataDialog();
break;
default:
break;
}
}
}
广播接收器（记的在AndroidManifest.xml注册）
package com.example.alarmreceiverdemo;
import com.example.alarmreceiverdemo.utils.NotificationHelper;
import com.example.alarmreceiverdemo.utils.PhoneUtils;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.widget.Toast;
/**
* @project AlarmReceiverDemo
* @ClassName AlarmReceiver.java
* @Description 接收广播
* @author xugang
* @date 2015-7-7 下午12:16:00
*/
public class AlarmReceiver extends BroadcastReceiver {
public final static String action = "";
@Override
public void onReceive(Context context, Intent intent) {
String act = intent.getAction();
Toast.makeText(context, "定是时间到:" + act, Toast.LENGTH_SHORT).show();
NotificationHelper.showNotification(context, PhoneUtils.getIntent(), context.getString(R.string.app_name), "定时时间到");
}
}
发送通知：
public class NotificationHelper {
/**
* 发通知
*
* @param context
* @param intent
* @param title
* @param content
*/
public static void showNotification(Context context, Intent intent, String title, String content) {
NotificationCompat.Builder mBuilder = new NotificationCompat.Builder(context).setSmallIcon(R.drawable.ic_launcher).setContentTitle(title).setContentText(content);
mBuilder.setWhen(System.currentTimeMillis());
PendingIntent pendingintent = PendingIntent.getActivity(context, 0, intent, PendingIntent.FLAG_UPDATE_CURRENT);
mBuilder.setContentIntent(pendingintent);
Notification notification = mBuilder.build();
notification.flags = Notification.FLAG_AUTO_CANCEL;
notification.defaults |= Notification.DEFAULT_ALL;
NotificationManager mNotificationManager = (NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE);
// mId allows you to update the notification later on.
mNotificationManager.notify((int) System.currentTimeMillis(), notification);
}
}得到打开本应用的Intent：
public static Intent getIntent() {
Intent intent = new Intent("android.intent.action.MAIN");
intent.addCategory("android.intent.category.LAUNCHER");
intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_RESET_TASK_IF_NEEDED);
intent.setComponent(ComponentName.unflattenFromString("com.example.alarmreceiverdemo/.MainActivity"));
return intent;
}Layout:
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical" >
<Button
android:id="@+id/setting"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="设置" />
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal" >
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:padding="10dip"
android:text="设置时间:" />
<TextView
android:id="@+id/time"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:padding="10dip" />
LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal" >
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:padding="10dip"
android:text="现在时间:" />
<TextView
android:id="@+id/cur"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:padding="10dip" />
LinearLayout>
LinearLayout>