Sorry, this information is not available if your task has has multiple activities in it. On Apr 30, 2011 3:18 AM, "Manohar Mahapatra" <[email protected]> wrote: > Hi Dianne, > > I was aware of all these flags. My app has a requirement to know when my > root / secondary activities are brought to focus by long clicking Home > (Recent Apps). So I started using > FLAG_ACTIVITY_LAUNCHED_FROM_HISTORY< http://developer.android.com/reference/android/content/Intent.html#FLAG_ACTIVITY_LAUNCHED_FROM_HISTORY > > in > my code but saw that it was never set in getFlags(). Then I did more > investigation and I found all these observation below. > > Can you let me know how to know for any activity(other than root activity) *on > top of App task* to know that it has been launched by long clicking Home > (Recent Apps) . As per my observation, getFlags() returns 0 for any > secondary activity > (i.e other than the root activity) that is launched by root activity. > > thanks for your inputs and time > AndUzer > > On Sat, Apr 30, 2011 at 12:32 PM, Dianne Hackborn <[email protected] >wrote: > >> Why do you care? You are looking at log statements. The log from the >> activity manager happens to be the Intent printed at some point in its >> processing. There is nothing defined in the API that some log print in the >> system is going to have the same Intent flags values as what is handed to >> the application. >> >> The activity manager is printing the intent that is handed to it when the >> request to start the activity happens. It will add in flags that should be >> set for the launch at that point as defined by the API. >> >> Did you even look at what these flags are? >> >> 0x10000000: >> http://developer.android.com/reference/android/content/Intent.html#FLAG_ACTIVITY_NEW_TASK >> >> 0x00100000: >> >> http://developer.android.com/reference/android/content/Intent.html#FLAG_ACTIVITY_LAUNCHED_FROM_HISTORY >> >> 0x00200000: >> >> http://developer.android.com/reference/android/content/Intent.html#FLAG_ACTIVITY_RESET_TASK_IF_NEEDED >> >> And for the one where you say there are no flags, yes, there are no flag >> bits set so to save space nothing is printed about the flag. >> >> This all seems to be working perfectly fine to me, >> >> On Sat, Apr 30, 2011 at 12:10 AM, Manohar Mahapatra < [email protected] >> > wrote: >> >>> Hi, >>> >>> >>> >>> I am seeing some issues in the way the following API( *getFlags()*) of >>> the Intent class works . I see that the Activity Manager starts a Activity >>> with some value of flag set in the Intent but when I print the Intent object >>> in the root Activity , >>> >>> the flag value in the Intent object is not same as what Activity Manager >>> launched the intent with for some scenarios. Second issue Any other Activity >>> launched by the root activity has no info of the flag in the intent >>> >>> >>> >>> "int getFlags< http://developer.android.com/reference/android/content/Intent.html#getFlags%28%29 >() >>> >>> >>> Retrieve any special flags associated with this intent." >>> >>> >>> >>> >>> >>> In my use case , I have an Application which has two activities, the >>> Android Manifest file looks something like this >>> >>> >>> >>> <?xml version=*"1.0"* encoding=*"utf-8"*?> >>> >>> <manifest xmlns:android=*"http://schemas.android.com/apk/res/android"* >>> >>> package=*"com.example.flag"* >>> >>> android:versionCode=*"1"* >>> >>> android:versionName=*"1.0"*> >>> >>> <application android:icon=*"@drawable/icon"* android:label=* >>> "@string/app_name"*> >>> >>> <activity android:name=*".MainActivity"* >>> >>> android:label=*"@string/app_name"*> >>> >>> <intent-filter> >>> >>> <action android:name=*"android.intent.action.MAIN"* /> >>> >>> <category android:name=* >>> "android.intent.category.LAUNCHER"* /> >>> >>> </intent-filter> >>> >>> </activity> >>> >>> >>> >>> <activity android:name=*".SecondActivity"* >>> >>> android:label=*"@string/app_name1"*> >>> >>> </activity> >>> >>> </application> >>> >>> </manifest> >>> >>> >>> >>> The code for the “MainActivity” is as follows >>> >>> >>> >>> *package* com.example.flag; >>> >>> *import* android.app.Activity; >>> >>> *import* android.content.Intent; >>> >>> *import* android.os.Bundle; >>> >>> *import* android.util.Log; >>> >>> *import* android.view.View; >>> >>> *import* android.view.View.OnClickListener; >>> >>> *import* android.widget.Button; >>> >>> >>> >>> *public* *class* MainActivity *extends* Activity { >>> >>> /** Called when the activity is first created. */ >>> >>> @Override >>> >>> *public* *void* onCreate(Bundle savedInstanceState) { >>> >>> *super*.onCreate(savedInstanceState); >>> >>> setContentView(R.layout.*main*); >>> >>> >>> >>> Button b = (Button) findViewById(R.id.*button1*); >>> >>> b.setOnClickListener(*new* OnClickListener() { >>> >>> *public* *void* onClick(View v) { >>> >>> startActivity(*new* Intent(MainActivity.*this* >>> ,SecondActivity.*class*)); >>> >>> } >>> >>> }); >>> >>> } >>> >>> >>> >>> /* (non-*Javadoc*) >>> >>> * @see android.app.Activity#onResume() >>> >>> */ >>> >>> @Override >>> >>> *protected* *void* onResume() { >>> >>> *super*.onResume(); >>> >>> Log.*d*("MainActivity", "MainActivity >>> getIntent().toString()::" +getIntent().toString()); >>> >>> } >>> >>> } >>> >>> >>> >>> The code for the “SecondActivity” is as follows >>> >>> >>> >>> *package* com.example.flag; >>> >>> >>> >>> *import* android.app.Activity; >>> >>> *import* android.graphics.Color; >>> >>> *import* android.os.Bundle; >>> >>> *import* android.util.Log; >>> >>> *import* android.widget.TextView; >>> >>> >>> >>> *public* *class* SecondActivity *extends* Activity { >>> >>> /** Called when the activity is first created. */ >>> >>> @Override >>> >>> *public* *void* onCreate(Bundle savedInstanceState) { >>> >>> *super*.onCreate(savedInstanceState); >>> >>> >>> >>> TextView tv= *new* TextView(*this*); >>> >>> tv.setText("Second Activity"); >>> >>> tv.setBackgroundColor(Color.*WHITE*); >>> >>> setContentView(tv); >>> >>> } >>> >>> >>> >>> /* (non-*Javadoc*) >>> >>> * @see android.app.Activity#onResume() >>> >>> */ >>> >>> @Override >>> >>> *protected* *void* onResume() { >>> >>> *super*.onResume(); >>> >>> Log.*d*("SecondActivity", "MainActivity SecondActivity "+getIntent().toString()); >>> >>> } >>> >>> >>> >>> } >>> >>> >>> >>> >>> >>> First time launch , both the flags in ActivityManager and my >>> app(MainActivity) are same >>> >>> 04-30 03:14:05.132: INFO/ActivityManager(71): Starting activity: Intent { >>> act=android.intent.action.MAIN cat=[android.intent.category.LAUNCHER] * >>> flg=0x10000000* cmp=com.example.flag/.MainActivity } >>> >>> 04-30 03:14:05.372: INFO/ActivityManager(71): Start proc com.example.flag >>> for activity com.example.flag/.MainActivity: pid=235 uid=10032 gids={1015} >>> >>> 04-30 03:14:10.722: DEBUG/MainActivity(235): MainActivity getIntent().toString()::Intent >>> { act=android.intent.action.MAIN cat=[android.intent.category.LAUNCHER] * >>> flg=0x10000000* cmp=com.example.flag/.MainActivity } >>> >>> 04-30 03:14:11.132: INFO/ActivityManager(71): Displayed activity >>> com.example.flag/.MainActivity: 5970 ms (total 5970 ms) >>> >>> >>> >>> >>> >>> Then I press Home button , then I do a Long press Home to launch >>> MainActivity from the Recent Apps, I get this log and I see now *they are >>> not same.* >>> >>> 04-30 03:15:03.353: INFO/ActivityManager(71): Starting activity: Intent { >>> act=android.intent.action.MAIN cat=[android.intent.category.HOME] >>> flg=0x10200000 cmp=com.android.launcher/com.android.launcher2.Launcher } >>> >>> 04-30 03:15:15.562: INFO/ActivityManager(71): Starting activity: Intent { >>> act=android.intent.action.MAIN cat=[android.intent.category.LAUNCHER] * >>> flg=0x10100000* cmp=com.example.flag/.MainActivity } >>> >>> 04-30 03:15:15.652: DEBUG/MainActivity(235): MainActivity getIntent().toString()::Intent >>> { act=android.intent.action.MAIN cat=[android.intent.category.LAUNCHER] * >>> flg=0x10000000* cmp=com.example.flag/.MainActivity } >>> >>> >>> >>> Then I Press back on the MainActivity , bringing me to Android Home and >>> from the Home Page Icon List, again I launch the Main Activity, this time >>> the flags are same again >>> >>> 04-30 03:16:10.412: INFO/ActivityManager(71): Starting activity: Intent { >>> act=android.intent.action.MAIN cat=[android.intent.category.LAUNCHER] * >>> flg=0x10200000* cmp=com.example.flag/.MainActivity } >>> >>> 04-30 03:16:10.722: DEBUG/MainActivity(235): MainActivity getIntent().toString()::Intent >>> { act=android.intent.action.MAIN cat=[android.intent.category.LAUNCHER] * >>> flg=0x10200000* cmp=com.example.flag/.MainActivity } >>> >>> 04-30 03:16:10.982: INFO/ActivityManager(71): Displayed activity >>> com.example.flag/.MainActivity: 465 ms (total 465 ms) >>> >>> >>> >>> Then I press Home button , then I do a Long press Home to launch >>> MainActivity from the Recent Apps, I get this log and I see now *they are >>> not same.* >>> >>> 04-30 03:16:21.883: INFO/ActivityManager(71): Starting activity: Intent { >>> act=android.intent.action.MAIN cat=[android.intent.category.HOME] >>> flg=0x10200000 cmp=com.android.launcher/com.android.launcher2.Launcher } >>> >>> 04-30 03:16:30.293: INFO/ActivityManager(71): Starting activity: Intent { >>> act=android.intent.action.MAIN cat=[android.intent.category.LAUNCHER] * >>> flg=0x10100000* cmp=com.example.flag/.MainActivity } >>> >>> 04-30 03:16:30.382: DEBUG/MainActivity(235): MainActivity getIntent().toString()::Intent >>> { act=android.intent.action.MAIN cat=[android.intent.category.LAUNCHER] * >>> flg=0x10200000* cmp=com.example.flag/.MainActivity } >>> >>> >>> >>> Then I launch SecondActivity from the Main Activity >>> >>> 04-30 03:16:49.132: INFO/ActivityManager(71): Starting activity: Intent { >>> cmp=com.example.flag/.SecondActivity } >>> >>> 04-30 03:16:49.233: DEBUG/SecondActivity(235): MainActivity SecondActivity >>> Intent { cmp=com.example.flag/.SecondActivity } >>> >>> 04-30 03:16:49.542: INFO/ActivityManager(71): Displayed activity >>> com.example.flag/.SecondActivity: 338 ms (total 338 ms) >>> >>> >>> >>> I press Home button, I do a Long press Home to launch >>> MainActivity(MainActivity is first activity of this app task,Second Activity >>> being on top of MainActivity) from the Recent Apps, I get this log and I >>> don’t get any Flags from the Second Activity >>> >>> 04-30 03:16:56.833: INFO/ActivityManager(71): Starting activity: Intent { >>> act=android.intent.action.MAIN cat=[android.intent.category.HOME] >>> flg=0x10200000 cmp=com.android.launcher/com.android.launcher2.Launcher } >>> >>> 04-30 03:17:05.962: INFO/ActivityManager(71): Starting activity: Intent { >>> act=android.intent.action.MAIN cat=[android.intent.category.LAUNCHER] >>> flg=0x10100000 cmp=com.example.flag/.MainActivity } >>> >>> 04-30 03:17:06.022: DEBUG/SecondActivity(235): MainActivity SecondActivity >>> Intent { cmp=com.example.flag/.SecondActivity } *// No flag info here* >>> >>> * >>> * >>> >>> * >>> * >>> >>> I request anyone to tell me if there is some gap in my understanding or if >>> I did not use the components in proper way >>> >>> >>> thanks in advance >>> >>> AndUzer >>> >>> -- >>> You received this message because you are subscribed to the Google Groups >>> "android-platform" group. >>> To post to this group, send email to [email protected]. >>> To unsubscribe from this group, send email to >>> [email protected]. >>> For more options, visit this group at >>> http://groups.google.com/group/android-platform?hl=en. >>> >> >> >> >> -- >> Dianne Hackborn >> Android framework engineer >> [email protected] >> >> Note: please don't send private questions to me, as I don't have time to >> provide private support, and so won't reply to such e-mails. All such >> questions should be posted on public forums, where I and others can see and >> answer them. >> >> -- >> You received this message because you are subscribed to the Google Groups >> "android-platform" group. >> To post to this group, send email to [email protected]. >> To unsubscribe from this group, send email to >> [email protected]. >> For more options, visit this group at >> http://groups.google.com/group/android-platform?hl=en. >> > > -- > You received this message because you are subscribed to the Google > Groups "Android Developers" group. > To post to this group, send email to [email protected] > To unsubscribe from this group, send email to > [email protected] > For more options, visit this group at > http://groups.google.com/group/android-developers?hl=en
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