Thanks Mike. I'll post it to the correct Android-developer. On 5月25日, 上午5时06分, Mike Wolfson <[email protected]> wrote: > Ask this question elsewhere (like Android Developers, or Stack > Overflow). > > This forum is for discussing Android topics, not answering specific > code questions. > > On May 24, 2:03 am, "sharon.hou" <[email protected]> wrote: > > > Hi, > > > My application includes ActivityA / ActivityB / Activity C. Activity > > C is singleTask mode, not exported, no MAIN/LAUNCHER set, Activity C > > will be started by ActivityB. > > > Question: > > Why un-exported ActivityC can be launched by Launcher > > com.android.launcher which has a common UID=app_25 ? > > > My understanding it should be denied in startActivityLocked() when > > checking the permission since ActivityC is not exported and the > > aInfo.application.uid will be required to start ActivityC. What's > > wrong in my thought? > > > 1960 final int perm = > > mService.checkComponentPermission(aInfo.permission, callingPid, > > 1961 callingUid, aInfo.exported ? -1 : > > aInfo.applicationInfo.uid); > > > Test steps: > > S1. Launch my app in AppTray. > > S2. Press HomeKey to return to home screen. > > S3. Hold HomeKey to display all Recent launched app, my app can be > > launched successfully ( intent > > cmp=com.example.android.recents/.ActivityB) > > S4. Press Back key to return to home screen. > > S5. Hold HomeKey to display all Recent launched app, my app can be > > launched successfully (intent > > cmp=com.example.android.recents/.ActivityC) > > > Code: > > The AndroidManifest.xml is as below: > > <?xml version="1.0" encoding="utf-8"?> > > <manifest xmlns:android="http://schemas.android.com/apk/res/android"; > > package="com.example.android.recents" > > android:versionCode="1" > > android:versionName="1.0"> > > <application android:icon="@drawable/icon" android:label="@string/ > > app_name"> > > <activity android:name=".ActivityA" /> > > > <activity android:name="ActivityC" > > android:launchMode="singleTask" / > > > <activity-alias android:name=".ActivityB" > > android:targetActivity=".ActivityA"> > > <intent-filter> > > <action > > android:name="android.intent.action.MAIN" /> > > <category > > android:name="android.intent.category.LAUNCHER" /> > > </intent-filter> > > </activity-alias> > > </application> > > <uses-sdk android:minSdkVersion="6" /> > > </manifest> > > > ActivityA.java is: > > public class ActivityA extends Activity { > > > @Override > > public void onCreate(Bundle savedInstanceState) { > > super.onCreate(savedInstanceState); > > startActivity(new Intent(this, ActivityC.class)); > > finish(); > > } > > > } > > > Log: > > app_25 128 32 146840 19264 ffffffff afd0eb08 S > > com.android.launcher > > > D:\test>adb logcat -v threadtime > > 05-24 16:34:27.065 58 191 I ActivityManager: Starting activity: > > Intent { act=android.intent.action.MAIN > > cat=[android.intent.category.LAUNCHER] flg=0x10200000 > > cmp=com.example.android.recents/.ActivityB } > > 05-24 16:34:27.234 58 62 I ActivityManager: Start proc > > com.example.android.recents for activity > > com.example.android.recents/.ActivityB: pid=271 uid=10038 gids={} > > 05-24 16:34:28.753 58 191 I ActivityManager: Starting activity: > > Intent { cmp=com.example.android.recents/.ActivityC } > > 05-24 16:34:29.174 58 88 I ActivityManager: Displayed activity > > com.example.android.recents/.ActivityC: 399 ms (total 2025 ms) > > 05-24 16:34:48.244 58 91 I ActivityManager: Starting activity: > > Intent { act=android.intent.action.MAIN > > cat=[android.intent.category.HOME] flg=0x10200000 > > cmp=com.android.launcher/com.android.launcher2.Launcher } > > 05-24 16:34:54.963 58 91 I ActivityManager: Starting activity: > > Intent { act=android.intent.action.MAIN > > cat=[android.intent.category.HOME] flg=0x10200000 > > cmp=com.android.launcher/com.android.launcher2.Launcher } > > 05-24 16:35:08.734 58 90 I ActivityManager: Starting activity: > > Intent { act=android.intent.action.MAIN > > cat=[android.intent.category.LAUNCHER] flg=0x10100000 > > cmp=com.example.android.recents/.ActivityB } > > 05-24 16:35:09.055 58 62 I ActivityManager: Starting activity: > > Intent { cmp=com.example.android.recents/.ActivityC } > > 05-24 16:35:09.064 58 116 W ActivityManager: Duplicate finish > > request for HistoryRecord{450a6ed8 > > com.example.android.recents/.ActivityB} > > 05-24 16:35:32.916 58 90 I ActivityManager: Starting activity: > > Intent { flg=0x10100000 > > cmp=com.example.android.recents/.ActivityC } <<<<???? why is this > > successfull ? > > 05-24 16:35:33.774 58 88 I ActivityManager: Displayed activity > > com.example.android.recents/.ActivityC: 828 ms (total 24876 ms)
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