我对Android很新，我正在尝试一个闹钟应用程序。我正在通过AlarmManager开始一项活动，只要手机处于唤醒状态，它就能正常工作。当手机处于睡眠状态时，它似乎正确运行代码，然后运行onStop功能关闭活动。我尝试过WakeLock和Window标志的各种组合但没有用。
但如果有帮助的话，这适用于较旧的手机（2.3）。任何见解都表示赞赏。
以下是警报活动的代码：
package com.myAlarm.android;
import java.text.SimpleDateFormat;
import java.util.Date;
import android.annotation.SuppressLint;
import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.content.SharedPreferences;
import android.hardware.Sensor;
import android.hardware.SensorManager;
import android.media.AudioManager;
import android.media.MediaPlayer;
import android.media.RingtoneManager;
import android.net.Uri;
import android.os.AsyncTask;
import android.os.Bundle;
import android.os.Handler;
import android.os.Vibrator;
import android.preference.PreferenceManager;
import android.util.Log;
import android.view.Gravity;
import android.view.View;
import android.view.View.MeasureSpec;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.view.ViewGroup.LayoutParams;
import android.view.Window;
import android.view.WindowManager;
import android.view.animation.Animation;
import android.view.animation.LinearInterpolator;
import android.view.animation.TranslateAnimation;
import android.widget.DigitalClock;
import android.widget.FrameLayout;
import android.widget.LinearLayout;
import android.widget.TextClock;
import android.widget.TextView;
import android.widget.Toast;
import android.widget.ImageView;
import com.snoozulooze.android.UtilityFunctions;
@SuppressLint("NewApi")
public class Alarm extends Activity{
private int timerDelay = 4000;
private int id;
private double snoozeInt = 1;
private TextView clockText;
private TextView dateText;
private LinearLayout clockLayout;
private DatabaseHandler db;
public static AlarmRow ALARM_DATA;
private Animation animScroll;
private SensorManager mSensorManager;
private ShakeEventListener mSensorListener;
private Runnable alertLoop;
private Handler handler;
private ImageView snooze;
@Override
protected void onCreate(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
turnOnScreen();
Log.i("ALARM", "on create ran");
AlarmWakeLock.acquireCpuWakeLock(Alarm.this);
setContentView(R.layout.activity_alarm);
mSensorManager = (SensorManager) getSystemService(Context.SENSOR_SERVICE);
mSensorListener = new ShakeEventListener();
handler = new Handler();
alertLoop = new Runnable() {
@Override
public void run() {
playAlarm();
handler.postDelayed(this, timerDelay);
}
};
//Create the clock for text clock of digital clock
LayoutParams clockParams = new LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.WRAP_CONTENT);
clockLayout = (LinearLayout)findViewById(R.id.alarmClockLayout);
dateText = (TextView) findViewById(R.id.alarmClockDateTxt);
try{
TextClock tc = new TextClock(Alarm.this);
tc.setLayoutParams(clockParams);
tc.setTextColor(getResources().getColor(R.color.white));
tc.setGravity(Gravity.CENTER);
clockText = (TextClock) tc;
}
catch(Throwable t){
Log.e("Alarm", t.getMessage());
DigitalClock dc = new DigitalClock(Alarm.this);
dc.setLayoutParams(clockParams);
dc.setTextColor(getResources().getColor(R.color.white));
dc.setGravity(Gravity.CENTER);
clockText = (TextView) dc;
}
clockLayout.addView(clockText,0);
UtilityFunctions.assignText(Alarm.this, clockText, "fonts/Roboto-Thin.ttf");
SimpleDateFormat sdf = new SimpleDateFormat("EEE. LLLL dd");
String currentDateandTime = sdf.format(new Date());
dateText.setText(currentDateandTime.toLowerCase());
clockLayout.post(new Runnable(){
public void run(){
float clockHeight = (float) (clockLayout.getHeight()*.35);
float dateHeight = (float) (clockLayout.getHeight()*.15);
if (clockHeight > 45){
clockHeight = 45;
dateHeight = 24;
}
clockText.setTextSize(((float) clockHeight));
dateText.setTextSize(((float) dateHeight));
}
});
//SetupAlarm aSetUp = new SetupAlarm();
//aSetUp.execute();
init();
}
private void init(){
db = new DatabaseHandler(this);
Intent fromIntent = getIntent();
Bundle bundle = fromIntent.getExtras();
id = bundle.getInt("id");
Alarm.ALARM_DATA = db.getAlarmData(id);
snooze = (ImageView) findViewById(R.id.snoozeAlarmBtn);
setupUI();
}
private void setupUI(){
String message = Alarm.ALARM_DATA.getMessage();
if(message != "" && message != null){
TextView tv = new TextView(Alarm.this);
tv.setText(message);
tv.setTextSize(16);
FrameLayout sf = (FrameLayout) findViewById(R.id.snoozFrame);
tv.measure(MeasureSpec.UNSPECIFIED, MeasureSpec.UNSPECIFIED);
sf.measure(MeasureSpec.UNSPECIFIED, MeasureSpec.UNSPECIFIED);
sf.addView(tv, tv.getMeasuredWidth(), ViewGroup.LayoutParams.WRAP_CONTENT);
animScroll = new TranslateAnimation(sf.getMeasuredWidth(), tv.getMeasuredWidth()*-1, 0, 0);
long durationMulti = ((sf.getMeasuredWidth()+tv.getMeasuredWidth())/sf.getMeasuredWidth());
int duration = (int) (5000*durationMulti);
animScroll.setDuration(duration);
animScroll.setInterpolator(new LinearInterpolator());
animScroll.setRepeatCount(Animation.INFINITE);
tv.startAnimation(animScroll);
}
snooze.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
handler.removeCallbacks(alertLoop);
handler.removeCallbacksAndMessages(null);
AlarmReceiverRepeating.resetPhone(Alarm.this);
AlarmReceiver ar = new AlarmReceiver();
ar.setOnetimeTimer(Alarm.this, Alarm.ALARM_DATA.getId(), (long) (System.currentTimeMillis() + (1000*60*snoozeInt)),Alarm.ALARM_DATA.getId());
Intent mainIntent = new Intent(Alarm.this,Main.class);
mainIntent.addFlags(Intent.FLAG_ACTIVITY_REORDER_TO_FRONT);
startActivity(mainIntent);
finish();
AlarmWakeLock.releaseCpuLock();
}
});
mSensorListener.setOnShakeListener(new ShakeEventListener.OnShakeListener() {
public void onShake() {
handler.removeCallbacks(alertLoop);
handler.removeCallbacksAndMessages(null);
AlarmReceiverRepeating.resetPhone(Alarm.this);
Intent mainIntent = new Intent(Alarm.this,Main.class);
mainIntent.addFlags(Intent.FLAG_ACTIVITY_REORDER_TO_FRONT);
startActivity(mainIntent);
Notifications.setNextAlarmNotification(Alarm.this);
AlarmReceiverRepeating.resetPhone(Alarm.this);
finish();
AlarmWakeLock.releaseCpuLock();
}
});
AlarmReceiverRepeating.setCurrentState(Alarm.this,Alarm.ALARM_DATA.getVolume());
handler.post(alertLoop);
}
//function for playing the ringer and vibrator
public void playAlarm(){
try {
if(AlarmReceiverRepeating.AUDIO_MANAGER == null){
AlarmReceiverRepeating.setCurrentState(Alarm.this, Alarm.ALARM_DATA.getVolume());
}
AlarmReceiverRepeating.REPEAT_COUNT ++;
if(AlarmReceiverRepeating.REPEAT_COUNT > 1){
AlarmReceiverRepeating.REPEAT_COUNT = 0;
if(AlarmReceiverRepeating.CURRENT_VOLUME < AlarmReceiverRepeating.ADJUSTED_MAX_VOLUME)
AlarmReceiverRepeating.CURRENT_VOLUME++;
}
AlarmReceiverRepeating.AUDIO_MANAGER.setStreamVolume(AudioManager.STREAM_RING, AlarmReceiverRepeating.CURRENT_VOLUME, AudioManager.FLAG_REMOVE_SOUND_AND_VIBRATE);
Vibrator vibrator = (Vibrator) this.getSystemService(Context.VIBRATOR_SERVICE);
vibrator.vibrate(2000);
AlarmReceiverRepeating.AUDIO_MANAGER.setStreamVolume(AudioManager.STREAM_RING, AlarmReceiverRepeating.CURRENT_VOLUME, AudioManager.FLAG_REMOVE_SOUND_AND_VIBRATE);
Uri alarm = RingtoneManager.getDefaultUri(RingtoneManager.TYPE_ALARM);
SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(Alarm.this);
MediaPlayer mediaPlayer = new MediaPlayer();
try {
mediaPlayer.setDataSource(Alarm.this, alarm);
} catch (Exception e1) {
e1.printStackTrace();
mediaPlayer.release();
return;
}
mediaPlayer.setAudioStreamType(AudioManager.STREAM_RING);
mediaPlayer.setOnCompletionListener(new MediaPlayer.OnCompletionListener() {
@Override
public void onCompletion(MediaPlayer mediaPlayer) {
mediaPlayer.release();
}
});
try {
mediaPlayer.prepare();
} catch (Exception e1) {
e1.printStackTrace();
mediaPlayer.release();
return;
}
mediaPlayer.setOnSeekCompleteListener(new MediaPlayer.OnSeekCompleteListener() {
@Override
public void onSeekComplete(MediaPlayer mediaPlayer) {
mediaPlayer.stop();
mediaPlayer.start();
}
});
mediaPlayer.setVolume(AlarmReceiverRepeating.CURRENT_VOLUME, AlarmReceiverRepeating.CURRENT_VOLUME);
mediaPlayer.start();
}
catch (Throwable t) {
Log.i("ALARM", "ERROR PLAYING ALARM");
Toast.makeText(this, "there was a problem in the playAlarm function", Toast.LENGTH_SHORT).show();
}
}//end playAlarm
@Override
protected void onStop(){
super.onStop();
Log.i("ALARM", "on stop ran");
handler.removeCallbacks(alertLoop);
handler.removeCallbacksAndMessages(null);
Notifications.setNextAlarmNotification(Alarm.this);
AlarmReceiverRepeating.resetPhone(this);
finish();
AlarmWakeLock.releaseCpuLock();
}
@Override
protected void onStart(){
super.onStart();
}
@Override
protected void onPause(){
super.onPause();
Log.i("ALARM", "on pause ran");
}
@Override
protected void onDestroy(){
super.onDestroy();
}
@Override
protected void onResume() {
super.onResume();
turnOnScreen();
Log.i("ALARM", "on resume ran");
mSensorManager.registerListener(mSensorListener,
mSensorManager.getDefaultSensor(Sensor.TYPE_ACCELEROMETER),
SensorManager.SENSOR_DELAY_UI);
}
private void turnOnScreen(){
final Window window = this.getWindow();
window.addFlags(WindowManager.LayoutParams.FLAG_TURN_SCREEN_ON
+ WindowManager.LayoutParams.FLAG_SHOW_WHEN_LOCKED
+ WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON
+ WindowManager.LayoutParams.FLAG_DISMISS_KEYGUARD);
}
private class SetupAlarm extends AsyncTask<Void, Void, Void> {
protected Void doInBackground(Void... urls) {
init();
return null;
}
protected void onPostExecute(Void args) {
setupUI();
}
}
}
我已经弄清楚发生了什么。这不是一个唤醒问题。问题是，无论出于何种原因，当手机从睡眠状态唤醒时，onStop功能（仍在）被调用。因为我有一个finish（）函数运行它杀死了活动。我将代码放在onStop覆盖中，以便当用户点击后面或主页按钮时警报将停止，因此我需要解决这个问题，除非有人可以告诉我为什么onStop被称为如何避免它。谢谢
答案 0 :(得分：0)
您需要在清单中包含此权限：
uses-permission android：name =“android.permission.WAKE_LOCK”或看到它可能对你有用How do I prevent an Android device from going to sleep programmatically?