Android 正在启动服务,但未调用OnCreate或OnStart
我目前正在做一个android项目,我正在尝试启动一个服务,当服务开始运行一些代码来初始化一些东西时 下面是我在服务中使用的代码Android 正在启动服务,但未调用OnCreate或OnStart,android,service,Android,Service,我目前正在做一个android项目,我正在尝试启动一个服务,当服务开始运行一些代码来初始化一些东西时 下面是我在服务中使用的代码 Context context; PowerManager.WakeLock wakeLock; public PowerDetectionService(Context context) { this.context = context; } public PowerDetectionService()
Context context;
PowerManager.WakeLock wakeLock;
public PowerDetectionService(Context context)
{
this.context = context;
}
public PowerDetectionService()
{}
public void onCreate()
{
super.onCreate();
PowerManager pm = (PowerManager)getApplication().getApplicationContext().getSystemService(Context.POWER_SERVICE);
wakeLock = pm.newWakeLock(PowerManager.FULL_WAKE_LOCK, "ScreenStay");
}
public void onStart(Intent intent, int startId)
{
super.onStart(intent, startId);
PowerManager pm = (PowerManager)getApplication().getApplicationContext().getSystemService(Context.POWER_SERVICE);
wakeLock = pm.newWakeLock(PowerManager.FULL_WAKE_LOCK, "ScreenStay");
}
@Override
public IBinder onBind(Intent intent) {
return null;
}
public void receivedPowerConnected()
{
try
{
Toast.makeText(context, "Power connected", Toast.LENGTH_LONG).show();
wakeLock.acquire();
}
catch (Exception ex)
{
Toast.makeText(context, ex.toString(), Toast.LENGTH_LONG).show();
}
}
public void receivedPowerDisconnected()
{
try
{
Toast.makeText(context, "Power disconnected", Toast.LENGTH_LONG).show();
wakeLock.release();
}
catch (Exception ex)
{
Toast.makeText(context, ex.toString(), Toast.LENGTH_LONG).show();
}
}
唤醒锁始终为空,因为该代码位永远不会在oncreate或onstart中执行。我试着把它放在bind函数中,但仍然没有乐趣
当我进入android设置时,我可以看到我的应用程序正在运行该服务,但我需要先初始化该代码,然后才能工作
谢谢你能提供的帮助
更新
我发现由于前面的评论,函数被调用了。由于某种原因,调试器不会被触发
下面是显示如何根据请求创建服务器的代码
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
startService(this);
}
public void onResume()
{
super.onResume();
startService(this);
}
private void startService(Context context)
{
Intent service = new Intent(context, PowerDetectionService.class);
context.startService(service);
}
更新2
以下是启动服务和执行唤醒锁定的所有代码
下面是启动服务的主要活动
public class MainActivity extends Activity {
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
StartPowerService(this);
//getActionBar().setDisplayHomeAsUpEnabled(true);
}
public void onResume()
{
super.onResume();
StartPowerService(this);
}
private void StartPowerService(Context context)
{
Intent service = new Intent(context, PowerDetectionService.class);
startService(service);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.activity_main, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
//case android.R.id.home:
// NavUtils.navigateUpFromSameTask(this);
// return true;
}
return super.onOptionsItemSelected(item);
}
}
public class PowerDetectionService extends Service {
Context context;
PowerManager.WakeLock wakeLock;
public PowerDetectionService(Context context)
{
this.context = context;
}
public PowerDetectionService()
{}
public void onCreate()
{
super.onCreate();
Log.d("SERVICE", "ON CREATE CALLED");
PowerManager pm = (PowerManager)getApplication().getApplicationContext().getSystemService(Context.POWER_SERVICE);
wakeLock = pm.newWakeLock(PowerManager.FULL_WAKE_LOCK, "ScreenStay");
}
public int OnStartCommand(Intent intent, int flags, int startId)
{
Log.d("SERVICE", "ONSTARTCOMMAND Called");
PowerManager pm = (PowerManager)getApplication().getApplicationContext().getSystemService(Context.POWER_SERVICE);
wakeLock = pm.newWakeLock(PowerManager.FULL_WAKE_LOCK, "ScreenStay");
return START_STICKY;
}
public void onStart(Intent intent, int startId)
{
super.onStart(intent, startId);
Log.d("SERVICE", "ON START CALLED");
PowerManager pm = (PowerManager)getApplication().getApplicationContext().getSystemService(Context.POWER_SERVICE);
wakeLock = pm.newWakeLock(PowerManager.FULL_WAKE_LOCK, "ScreenStay");
}
@Override
public IBinder onBind(Intent intent) {
return null;
}
public void receivedPowerConnected()
{
try
{
Toast.makeText(context, "Power connected", Toast.LENGTH_LONG).show();
wakeLock.acquire();
}
catch (Exception ex)
{
Toast.makeText(context, ex.toString(), Toast.LENGTH_LONG).show();
}
}
public void receivedPowerDisconnected()
{
try
{
Toast.makeText(context, "Power disconnected", Toast.LENGTH_LONG).show();
wakeLock.release();
}
catch (Exception ex)
{
Toast.makeText(context, ex.toString(), Toast.LENGTH_LONG).show();
}
}
}
下面是该服务的课程
public class MainActivity extends Activity {
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
StartPowerService(this);
//getActionBar().setDisplayHomeAsUpEnabled(true);
}
public void onResume()
{
super.onResume();
StartPowerService(this);
}
private void StartPowerService(Context context)
{
Intent service = new Intent(context, PowerDetectionService.class);
startService(service);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.activity_main, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
//case android.R.id.home:
// NavUtils.navigateUpFromSameTask(this);
// return true;
}
return super.onOptionsItemSelected(item);
}
}
public class PowerDetectionService extends Service {
Context context;
PowerManager.WakeLock wakeLock;
public PowerDetectionService(Context context)
{
this.context = context;
}
public PowerDetectionService()
{}
public void onCreate()
{
super.onCreate();
Log.d("SERVICE", "ON CREATE CALLED");
PowerManager pm = (PowerManager)getApplication().getApplicationContext().getSystemService(Context.POWER_SERVICE);
wakeLock = pm.newWakeLock(PowerManager.FULL_WAKE_LOCK, "ScreenStay");
}
public int OnStartCommand(Intent intent, int flags, int startId)
{
Log.d("SERVICE", "ONSTARTCOMMAND Called");
PowerManager pm = (PowerManager)getApplication().getApplicationContext().getSystemService(Context.POWER_SERVICE);
wakeLock = pm.newWakeLock(PowerManager.FULL_WAKE_LOCK, "ScreenStay");
return START_STICKY;
}
public void onStart(Intent intent, int startId)
{
super.onStart(intent, startId);
Log.d("SERVICE", "ON START CALLED");
PowerManager pm = (PowerManager)getApplication().getApplicationContext().getSystemService(Context.POWER_SERVICE);
wakeLock = pm.newWakeLock(PowerManager.FULL_WAKE_LOCK, "ScreenStay");
}
@Override
public IBinder onBind(Intent intent) {
return null;
}
public void receivedPowerConnected()
{
try
{
Toast.makeText(context, "Power connected", Toast.LENGTH_LONG).show();
wakeLock.acquire();
}
catch (Exception ex)
{
Toast.makeText(context, ex.toString(), Toast.LENGTH_LONG).show();
}
}
public void receivedPowerDisconnected()
{
try
{
Toast.makeText(context, "Power disconnected", Toast.LENGTH_LONG).show();
wakeLock.release();
}
catch (Exception ex)
{
Toast.makeText(context, ex.toString(), Toast.LENGTH_LONG).show();
}
}
}
下面是mainfest文件
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.BoardiesITSolutions.ScreeenStay"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="15" />
<uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" />
<uses-permission android:name="android.permission.WAKE_LOCK" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<application
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<activity
android:name=".MainActivity"
android:label="@string/title_activity_main" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<service android:name="PowerDetectionService"
android:process=":ScreenStay"
android:icon="@drawable/ic_launcher"
android:label="Screen Stay">
</service>
<receiver android:name="BroadcastReceiveDetection">
<intent-filter>
<action android:name="android.intent.action.BOOT_COMPLETED" />
<action android:name="android.intent.action.ACTION_POWER_CONNECTED" />
<action android:name="android.intent.action.ACTION_POWER_DISCONNECTED" />
</intent-filter>
</receiver>
</application>
</manifest>
希望这有帮助 您要扩展哪个类?服务 方法
onStart()
仅用于旧的Android版本(请注意:
onStart()
方法已被弃用,您应该改用onStart命令()
(只有在使用Context.startService()启动服务时才会调用该方法)
但是,如果您的服务确实运行(但只有一次),则应调用onCreate()
。您是在不同的进程中启动服务的
<service android:name="PowerDetectionService"
android:process=":ScreenStay"
android:icon="@drawable/ic_launcher"
android:label="Screen Stay">
调试器已附加到主进程。当新进程启动时,它没有附加调试器,因此它将忽略断点。如果要调试远程进程,可以在DDMS透视图中通过Eclipse进行调试。在“设备”下,可以看到其进程。然后可以选择一个并按“调试选定进程”(绿色错误图标)。当您只想在某个时间点开始调试应用程序时,这也很有用
至于调试onCreate()
,您必须在进程启动后,但在调用onCreate()
之前附加调试器。例如,您可以在onCreate()
的开头放置一些Thread.sleep()
几秒钟,以便附加调试器。您确定您的方法是onCreate()和onStart没有被调用?由于其他原因,你的唤醒锁可能为空。我在它们上面都设置了断点,它们从未被触发。但我只是在代码中添加了Log.d以确保它们被打印出来。为什么会为空?然后你能告诉我们如何启动服务吗?我已根据请求添加了代码Hanks尝试了这个方法这不会被执行,我已经输入了一个Log.d,但是没有输出任何内容,只调用了onCreate。您要扩展哪个类?我正在使用扩展服务如何启动服务?我在回答中添加了如何启动服务。
PowerManager pm = (PowerManager)this.getSystemService(Context.POWER_SERVICE);
<service android:name="PowerDetectionService"
android:process=":ScreenStay"
android:icon="@drawable/ic_launcher"
android:label="Screen Stay">