Android开机启动流程5_第三方code

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本文详细解析了Android系统的启动流程，从SystemServer.java到ActivityManagerService.java，再到ActivityStack.java等核心文件，阐述了如何启动第三方代码及初始Activity的过程。

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这部分的代码都@frameworks\base\services\java\com\android\server\

SystemServer.java

// We now tell the activity manager it is okay to run third party

// code. It will call back into us once it has gotten to the state

// where third party code can really run (but before it has actually

// started launching the initial applications), for us to complete our

// initialization.

ActivityManagerService.self().systemReady(new Runnable() {

...

}

注：从这里开始启动第三方代码。

ActivityManagerService.java

public void systemReady(final Runnable goingCallback) {

...

mMainStack.resumeTopActivityLocked(null);

...

}

注：//恢复 top activity

ActivityStack.java

final boolean resumeTopActivityLocked(ActivityRecord prev) {

...

if (next == null) {

// There are no more activities! Let's just start up the

// Launcher...

if (mMainStack) {

return mService.startHomeActivityLocked();

}

...

}

注：因为现在没有任何启动的 activity，将会启动 startHomeActivityLocked　

ActivityManagerService.java

boolean startHomeActivityLocked(int userId) {

if (mHeadless) {

// Added because none of the other calls to ensureBootCompleted seem to fire

// when running headless.

ensureBootCompleted();

return false;

}

if (mFactoryTest == SystemServer.FACTORY_TEST_LOW_LEVEL

&& mTopAction == null) {

// We are running in factory test mode, but unable to find

// the factory test app, so just sit around displaying the

// error message and don't try to start anything.

return false;

}

Intent intent = new Intent(

mTopAction,

mTopData != null ? Uri.parse(mTopData) : null);

intent.setComponent(mTopComponent);

intent.setComponent(new ComponentName("com.amlogic.launcher", "com.amlogic.launcher.Launcher_new"));

if (mFactoryTest != SystemServer.FACTORY_TEST_LOW_LEVEL) {

intent.addCategory(Intent.CATEGORY_HOME);

}

ActivityInfo aInfo =

resolveActivityInfo(intent, STOCK_PM_FLAGS, userId);

if (aInfo != null) {

intent.setComponent(new ComponentName(

aInfo.applicationInfo.packageName, aInfo.name));

// Don't do this if the home app is currently being

// instrumented.

aInfo = new ActivityInfo(aInfo);

aInfo.applicationInfo = getAppInfoForUser(aInfo.applicationInfo, userId);

ProcessRecord app = getProcessRecordLocked(aInfo.processName,

aInfo.applicationInfo.uid);

if (app == null || app.instrumentationClass == null) {

if(SystemProperties.getBoolean("ro.tv.source_rember", false))

{

if(SystemProperties.getBoolean("persist.tv.first_start", true))

{

intent.setFlags(intent.getFlags() | Intent.FLAG_ACTIVITY_NEW_TASK);

mMainStack.startActivityLocked(null, intent, null, aInfo,

null, null, 0, 0, 0, 0, null, false, null);

}

else

{

Intent intent_start_tvsetup = new Intent("com.tv.TvSetup.TvSetupService") ;

startService( null , intent_start_tvsetup , null ,0);

Log.d(TAG, "don't start Luncher for persist.tv.source_android=false");

}

else

{

intent.setFlags(intent.getFlags() | Intent.FLAG_ACTIVITY_NEW_TASK);

mMainStack.startActivityLocked(null, intent, null, aInfo,

null, null, 0, 0, 0, 0, null, false, null);

Log.d(TAG, " {" + intent.toShortString(true, true, true, false) + "} " );

Log.d(TAG, "startActivityLocked Luncher start");

}

return true;

}

boolean startHomeActivityLocked() {

...

intent.addCategory(Intent.CATEGORY_HOME);

...

}

注：启动CATEGORY_HOME的activity

final void finishBooting() {

...

new Intent(Intent.ACTION_BOOT_COMPLETED, null),

...

}

注：发出ACTION_BOOT_COMPLETED的广播