Activity的启动流程
Android11 展讯平台的Activity 启动流程
---Activity oncreate------ java.lang.Exception at android.app.Activity.onCreate(Activity.java:1594) at androidx.core.app.ComponentActivity.onCreate(ComponentActivity.java:85) at androidx.activity.ComponentActivity.onCreate(ComponentActivity.java:282) at androidx.fragment.app.FragmentActivity.onCreate(FragmentActivity.java:240) at com.android.settings.core.SettingsBaseActivity.onCreate(SettingsBaseActivity.java:65) at com.android.settings.SettingsActivity.onCreate(SettingsActivity.java:254) at android.app.Activity.performCreate(Activity.java:8072) at android.app.Activity.performCreate(Activity.java:8055) at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1309) at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3470) at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3678) at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:85) at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:135) at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:95) at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2106) at android.os.Handler.dispatchMessage(Handler.java:106) at android.os.Looper.loop(Looper.java:223) at android.app.ActivityThread.main(ActivityThread.java:7942) at java.lang.reflect.Method.invoke(Native Method) at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:608) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:948) 以上是执行Activity oncreate方法的步骤 而在执行onStart方法或是Restart方法时稍微有一点区别 tId:-1573709730 Transitioning activity: .uioverrides.QuickstepLauncher to state: ON_RESTART ----performLifecycleSequence----- java.lang.Exception at android.app.servertransaction.TransactionExecutor.performLifecycleSequence(TransactionExecutor.java:218) at android.app.servertransaction.TransactionExecutor.cycleToPath(TransactionExecutor.java:201) at android.app.servertransaction.TransactionExecutor.cycleToPath(TransactionExecutor.java:183) at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:132) at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:95) at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2107) at android.os.Handler.dispatchMessage(Handler.java:106) at android.os.Looper.loop(Looper.java:223) at android.app.ActivityThread.main(ActivityThread.java:7944) at java.lang.reflect.Method.invoke(Native Method) at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:603) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:947) tId:-1573709730 Transitioning activity: .uioverrides.QuickstepLauncher to state: ON_START ----performLifecycleSequence----- java.lang.Exception at android.app.servertransaction.TransactionExecutor.performLifecycleSequence(TransactionExecutor.java:218) at android.app.servertransaction.TransactionExecutor.cycleToPath(TransactionExecutor.java:201) at android.app.servertransaction.TransactionExecutor.cycleToPath(TransactionExecutor.java:183) at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:132) at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:95) at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2107) at android.os.Handler.dispatchMessage(Handler.java:106) at android.os.Looper.loop(Looper.java:223) at android.app.ActivityThread.main(ActivityThread.java:7944) at java.lang.reflect.Method.invoke(Native Method) at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:603) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:947) 而执行oncreate onpause onstop resume方法都差不多，只是具体实现策略不同， PauseActivityItem，LaunchActivityItem，ResumeActivityItem，StopActivityItem ----ActivityThread::handlePauseActivity----- java.lang.Exception at android.app.ActivityThread.handlePauseActivity(ActivityThread.java:4754) at android.app.servertransaction.PauseActivityItem.execute(PauseActivityItem.java:46) at android.app.servertransaction.TransactionExecutor.executeLifecycleState(TransactionExecutor.java:176) at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:97) at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2106) at android.os.Handler.dispatchMessage(Handler.java:106) at android.os.Looper.loop(Looper.java:223) at android.app.ActivityThread.main(ActivityThread.java:7951) at java.lang.reflect.Method.invoke(Native Method) at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:603) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:947) ----ActivityThread::handleLaunchActivity----- java.lang.Exception at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3648) at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:85) at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:135) at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:95) at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2106) at android.os.Handler.dispatchMessage(Handler.java:106) at android.os.Looper.loop(Looper.java:223) at android.app.ActivityThread.main(ActivityThread.java:7951) at java.lang.reflect.Method.invoke(Native Method) at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:603) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:947) ----ActivityThread::handleResumeActivity----- java.lang.Exception at android.app.ActivityThread.handleResumeActivity(ActivityThread.java:4570) at android.app.servertransaction.ResumeActivityItem.execute(ResumeActivityItem.java:52) at android.app.servertransaction.TransactionExecutor.executeLifecycleState(TransactionExecutor.java:176) at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:97) at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2106) at android.os.Handler.dispatchMessage(Handler.java:106) at android.os.Looper.loop(Looper.java:223) at android.app.ActivityThread.main(ActivityThread.java:7951) at java.lang.reflect.Method.invoke(Native Method) at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:603) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:947) ----ActivityThread::handleStopActivity----- java.lang.Exception at android.app.ActivityThread.handleStopActivity(ActivityThread.java:5020) at android.app.servertransaction.StopActivityItem.execute(StopActivityItem.java:40) at android.app.servertransaction.TransactionExecutor.executeLifecycleState(TransactionExecutor.java:176) at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:97) at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2106) at android.os.Handler.dispatchMessage(Handler.java:106) at android.os.Looper.loop(Looper.java:223) at android.app.ActivityThread.main(ActivityThread.java:7951) at java.lang.reflect.Method.invoke(Native Method) at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:603) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:947) AOSP/frameworks/base/core/java/android/app/ClientTransactionHandler.java 09-28 10:54:27.237 6707 7391 I zcailiu : ClientTransactionHandler:: scheduleTransaction 09-28 10:54:27.237 6707 7391 I zcailiu : java.lang.Exception 09-28 10:54:27.237 6707 7391 I zcailiu : at android.app.ClientTransactionHandler.scheduleTransaction(ClientTransactionHandler.java:48) 09-28 10:54:27.237 6707 7391 I zcailiu : at android.app.ActivityThread$ApplicationThread.scheduleTransaction(ActivityThread.java:1750) 09-28 10:54:27.237 6707 7391 I zcailiu : at android.app.IApplicationThread$Stub.onTransact(IApplicationThread.java:1275) 09-28 10:54:27.237 6707 7391 I zcailiu : at android.os.Binder.execTransactInternal(Binder.java:1159) 09-28 10:54:27.237 6707 7391 I zcailiu : at android.os.Binder.execTransact(Binder.java:1123) ActivityStackSuperVesion.java中
Android
1 Activity.java :: startActivity(Intent intent) ---> startActivity(intent, null) -----> startActivityForResult(intent, -1) ----> startActivityForResult(intent, requestCode, null)
Instrumentation.java :: execStartActivity()
ActivityTaskManagerService.java ::startActivity ---> startActivityAsUser ---> startActivityAsUser
ActivityStarter.java :: execute()---- >executeRequest---> startActivityUnchecked ------> startActivityInner
RootWindowContainer.java :: resumeFocusedStacksTopActivities()
ActivityStack.java :: resumeTopActivityUncheckedLocked --------> resumeTopActivityInnerLocked
Activity.startActivity => startActivityForResult
Instrumentation.execStartActivity
ActivityTaskManager.startActivity
ActivityTaskManagerService.startActivity => startActivityAsUser
ActivityStarter.execute => executeRequest => startActivityUnchecked => startActivityInner
RootWindowContainer.resumeFocusedStacksTopActivities
ActivityStack.resumeTopActivityUncheckedLocked => resumeTopActivityInnerLocked
ClientLifecycleManager.scheduleTransaction
ClientTransaction.schedule
ActivityThread.ApplicationThread.scheduleTransaction
ActivityThread.scheduleTransaction(ActivityThread父类ClientTransactionHandler的方法)
ActivityThread.H.EXECUTE_TRANSACTION
//这一部分应该有误的，该 博主写的这此流程是onstart 与restart方法的执行流程 且又不全对，并非oncreate的流程
TransactionExecutor.execute => executeCallbacks => cycleToPath => performLifecycleSequence
//oncreate的执行流程应该是:
TransactionExecutor.execute => executeCallbacks =>LaunchActivityItem.execute()
ActivityThread.handleLaunchActivity => performLaunchActivity
Instrumentation.newActivity => callActivityOnCreate
Activity.performCreate => onCreate
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原文链接：https://blog.csdn.net/guangdeshishe/article/details/114794116
activity的生命周期状态的切换位置 rameworks/base/core/java/android/app/servertransaction/TransactionExecutor.java
private void performLifecycleSequence(ActivityClientRecord r, IntArray path,
ClientTransaction transaction) {
final int size = path.size();
for (int i = 0, state; i < size; i++) {
state = path.get(i);
if (DEBUG_RESOLVER) {
Slog.d(TAG, tId(transaction) + "Transitioning activity: "
+ getShortActivityName(r.token, mTransactionHandler)
+ " to state: " + getStateName(state));
}
switch (state) {
case ON_CREATE:
mTransactionHandler.handleLaunchActivity(r, mPendingActions,
null /* customIntent */);
break;
case ON_START:
mTransactionHandler.handleStartActivity(r.token, mPendingActions);
break;
case ON_RESUME:
mTransactionHandler.handleResumeActivity(r.token, false /* finalStateRequest */,
r.isForward, "LIFECYCLER_RESUME_ACTIVITY");
break;
case ON_PAUSE:
mTransactionHandler.handlePauseActivity(r.token, false /* finished */,
false /* userLeaving */, 0 /* configChanges */, mPendingActions,
"LIFECYCLER_PAUSE_ACTIVITY");
break;
case ON_STOP:
mTransactionHandler.handleStopActivity(r.token, 0 /* configChanges */,
mPendingActions, false /* finalStateRequest */,
"LIFECYCLER_STOP_ACTIVITY");
break;
case ON_DESTROY:
mTransactionHandler.handleDestroyActivity(r.token, false /* finishing */,
0 /* configChanges */, false /* getNonConfigInstance */,
"performLifecycleSequence. cycling to:" + path.get(size - 1));
break;
case ON_RESTART:
mTransactionHandler.performRestartActivity(r.token, false /* start */);
break;
default:
throw new IllegalArgumentException("Unexpected lifecycle state: " + state);
}
}
}hjk@hjk-optiplex:~x/frameworks/base$ grep --include="*.java" "extends ClientTransactionItem" -srn .
grep: warning: GREP_OPTIONS is deprecated; please use an alias or script
./core/java/android/app/servertransaction/LaunchActivityItem.java:48:public class LaunchActivityItem extends ClientTransactionItem {
./core/java/android/app/servertransaction/ConfigurationChangeItem.java:30:public class ConfigurationChangeItem extends ClientTransactionItem {
./core/java/android/app/servertransaction/NewIntentItem.java:38:public class NewIntentItem extends ClientTransactionItem {
./core/java/android/app/servertransaction/EnterPipRequestedItem.java:27:public final class EnterPipRequestedItem extends ClientTransactionItem {
./core/java/android/app/servertransaction/ActivityRelaunchItem.java:39:public class ActivityRelaunchItem extends ClientTransactionItem {
./core/java/android/app/servertransaction/ActivityResultItem.java:36:public class ActivityResultItem extends ClientTransactionItem {
./core/java/android/app/servertransaction/FixedRotationAdjustmentsItem.java:30:public class FixedRotationAdjustmentsItem extends ClientTransactionItem {
./core/java/android/app/servertransaction/TopResumedActivityChangeItem.java:31:public class TopResumedActivityChangeItem extends ClientTransactionItem {
./core/java/android/app/servertransaction/ActivityLifecycleItem.java:28:public abstract class ActivityLifecycleItem extends ClientTransactionItem {
./core/java/android/app/servertransaction/ActivityConfigurationChangeItem.java:35:public class ActivityConfigurationChangeItem extends ClientTransactionItem {
hjk@hjk-optiplex:~/x/frameworks/base$ grep --include="*.java" "extends ActivityLifecycleItem" -srn .
/core/java/android/app/servertransaction/ResumeActivityItem.java:33:public class ResumeActivityItem extends ActivityLifecycleItem {
./core/java/android/app/servertransaction/StopActivityItem.java:30:public class StopActivityItem extends ActivityLifecycleItem {
./core/java/android/app/servertransaction/PauseActivityItem.java:33:public class PauseActivityItem extends ActivityLifecycleItem {
./core/java/android/app/servertransaction/StartActivityItem.java:30:public class StartActivityItem extends ActivityLifecycleItem {
./core/java/android/app/servertransaction/DestroyActivityItem.java:30:public class DestroyActivityItem extends ActivityLifecycleItem {https://www.jianshu.com/p/e17b9851973f?tdsourcetag=s_pcqq_aiomsg
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