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android采用BroadcastReceiver实现定时器
package net.blogjava.mobile;
import java.util.Calendar;
import android.app.Activity;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.SharedPreferences;
import android.media.MediaPlayer;
import android.util.Log;
public class AlarmReceiver extends BroadcastReceiver
{
private static int num = 0;
@Override
public void onReceive(Context context, Intent intent)
{
SharedPreferences sharedPreferences = context.getSharedPreferences(
"alarm_record", Activity.MODE_PRIVATE);
String hour = String.valueOf(Calendar.getInstance().get(
Calendar.HOUR_OF_DAY));
String minute = String.valueOf(Calendar.getInstance().get(
Calendar.MINUTE));
Log.e("ActionBroadCast", "New Message !" + num++);
// 从XML 文件夹获得描述当前时间点的value
String time = sharedPreferences.getString(hour + ":" + minute, null);
if (time != null) {
// 播放声音
MediaPlayer mediaPlayer = MediaPlayer.create(context, R.raw.ring);
mediaPlayer.start();
}
}
}
package net.blogjava.mobile;
import android.app.Activity;
import android.app.AlarmManager;
import android.app.AlertDialog;
import android.app.PendingIntent;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.SharedPreferences;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.TextView;
import android.widget.TimePicker;
public class Main extends Activity implements OnClickListener
{
private TextView tvAlarmRecord;
private SharedPreferences sharedPreferences;
@Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
Button btnAddAlarm = (Button) findViewById(R.id.btnAddAlarm);
tvAlarmRecord = (TextView) findViewById(R.id.tvAlarmRecord);
btnAddAlarm.setOnClickListener(this);
sharedPreferences = getSharedPreferences("alarm_record", Activity.MODE_PRIVATE);
AlarmManager alarmManager = (AlarmManager) getSystemService(Context.ALARM_SERVICE);
Intent intent = new Intent(this, AlarmReceiver.class);
//创建封装BroadcastReceiver 的pendingIntent对象
PendingIntent pendingIntent = PendingIntent.getBroadcast(this, 0,intent, 0);
//开始定时器，每1分钟执行一次,5s
alarmManager.setRepeating(AlarmManager.RTC, 0, 30000, pendingIntent);
//alarmManager.cancel(pendingIntent);
}
@Override
public void onClick(View v)
{
View view = getLayoutInflater().inflate(R.layout.alarm, null);
final TimePicker timePicker = (TimePicker) view.findViewById(R.id.timepicker);
timePicker.setIs24HourView(true);
// 显示设置时间点的对话框
new AlertDialog.Builder(this).setTitle("设置提醒时间").setView(view)
.setPositiveButton("确定", new DialogInterface.OnClickListener()
{
@Override
public void onClick(DialogInterface dialog, int which)
{
String timeStr = String.valueOf(timePicker.getCurrentHour())
+ ":"
+ String.valueOf(timePicker.getCurrentMinute());
//将时间点添加到 TextView 组件中
tvAlarmRecord.setText(tvAlarmRecord.getText().toString() + "\n" + timeStr);
//count++;
/*View view2 = new View(Main.this);
view2.setLayoutParams(new LayoutParams(LayoutParams.FILL_PARENT,1));
view2.setBackgroundColor(Color.RED);
LinearLayout linearLayout = (LinearLayout)getLayoutInflater().inflate(R.layout.main, null);
linearLayout.addView(view2); */
//保存时间点
sharedPreferences.edit().putString(timeStr, timeStr).commit();
}
}).setNegativeButton("取消", null).show();
}
}
最后更新：2017-04-03 16:48:42