主要看ActivityThread類
bind Application的方法
handleBindApplication(AppBindData data)
內部代碼塊
try {
4524 // If the app is being launched for full backup or restore, bring it up in
4525 // a restricted environment with the base application class.
4526 Application app = data.info.makeApplication(data.restrictedBackupMode, null);
4527 mInitialApplication = app;
4528
4529 // don't bring up providers in restricted mode; they may depend on the
4530 // app's custom Application class
4531 if (!data.restrictedBackupMode) {
4532 List<ProviderInfo> providers = data.providers;
4533 if (providers != null) {
4534 installContentProviders(app, providers); //繼續(xù)跟蹤這個做了哪些事情
4535 // For process that contains content providers, we want to
4536 // ensure that the JIT is enabled "at some point".
4537 mH.sendEmptyMessageDelayed(H.ENABLE_JIT, 10*1000);
4538 }
4539 }
4540
4541 // Do this after providers, since instrumentation tests generally start their
4542 // test thread at this point, and we don't want that racing.
4543 try {
4544 mInstrumentation.onCreate(data.instrumentationArgs);
4545 }
4546 catch (Exception e) {
4547 throw new RuntimeException(
4548 "Exception thrown in onCreate() of "
4549 + data.instrumentationName + ": " + e.toString(), e);
4550 }
4551
4552 try {
4553 mInstrumentation.callApplicationOnCreate(app); // 執(zhí)行Application.onCreate()
4554 } catch (Exception e) {
4555 if (!mInstrumentation.onException(app, e)) {
4556 throw new RuntimeException(
4557 "Unable to create application " + app.getClass().getName()
4558 + ": " + e.toString(), e);
4559 }
4560 }
跟蹤 installContentProviders(app, providers)
private void More ...installContentProviders(
4581 Context context, List<ProviderInfo> providers) {
4582 final ArrayList<IActivityManager.ContentProviderHolder> results =
4583 new ArrayList<IActivityManager.ContentProviderHolder>();
4584
4585 for (ProviderInfo cpi : providers) {
4586 if (DEBUG_PROVIDER) {
4587 StringBuilder buf = new StringBuilder(128);
4588 buf.append("Pub ");
4589 buf.append(cpi.authority);
4590 buf.append(": ");
4591 buf.append(cpi.name);
4592 Log.i(TAG, buf.toString());
4593 }
4594 IActivityManager.ContentProviderHolder cph = installProvider(context, null, cpi, //繼續(xù)跟蹤這里
4595 false /*noisy*/, true /*noReleaseNeeded*/, true /*stable*/);
4596 if (cph != null) {
4597 cph.noReleaseNeeded = true;
4598 results.add(cph);
4599 }
4600 }
4601
4602 try {
4603 ActivityManagerNative.getDefault().publishContentProviders(
4604 getApplicationThread(), results);
4605 } catch (RemoteException ex) {
4606 }
4607 }
跟蹤 installProvider(context, null, cpi,...
try {
4986 final java.lang.ClassLoader cl = c.getClassLoader();
4987 localProvider = (ContentProvider)cl.
4988 loadClass(info.name).newInstance();
4989 provider = localProvider.getIContentProvider();
4990 if (provider == null) {
4991 Slog.e(TAG, "Failed to instantiate class " +
4992 info.name + " from sourceDir " +
4993 info.applicationInfo.sourceDir);
4994 return null;
4995 }
4996 if (DEBUG_PROVIDER) Slog.v(
4997 TAG, "Instantiating local provider " + info.name);
4998 // XXX Need to create the correct context for this provider.
4999 localProvider.attachInfo(c, info); //繼續(xù)跟蹤這里
5000 } catch (java.lang.Exception e) {
5001 if (!mInstrumentation.onException(null, e)) {
5002 throw new RuntimeException(
5003 "Unable to get provider " + info.name
5004 + ": " + e.toString(), e);
5005 }
5006 return null;
5007 }
跟蹤 localProvider.attachInfo(c, info)
1674 private void More ...attachInfo(Context context, ProviderInfo info, boolean testing) {
1675 mNoPerms = testing;
1676
1677 /*
1678 * Only allow it to be set once, so after the content service gives
1679 * this to us clients can't change it.
1680 */
1681 if (mContext == null) {
1682 mContext = context;
1683 if (context != null) {
1684 mTransport.mAppOpsManager = (AppOpsManager) context.getSystemService(
1685 Context.APP_OPS_SERVICE);
1686 }
1687 mMyUid = Process.myUid();
1688 if (info != null) {
1689 setReadPermission(info.readPermission);
1690 setWritePermission(info.writePermission);
1691 setPathPermissions(info.pathPermissions);
1692 mExported = info.exported;
1693 mSingleUser = (info.flags & ProviderInfo.FLAG_SINGLE_USER) != 0;
1694 setAuthorities(info.authority);
1695 }
1696 ContentProvider.this.onCreate(); // 調用ContentProvider onCreate()
1697 }
1698 }
通過查看源碼的方式驗證ContentProvider onCreate()優(yōu)先執(zhí)行與 Application onCreate()
