android ContentProvider onCreate()在 Application onCreate()之前执行

分析源码5.1.1 r1
源码地址 http://grepcode.com/file/repository.grepcode.com/java/ext/com.google.android/android/5.1.1_r1/android/app/ActivityThread.java#ActivityThread.installProvider%28android.content.Context%2Candroid.app.IActivityManager.ContentProviderHolder%2Candroid.content.pm.ProviderInfo%2Cboolean%2Cboolean%2Cboolean%29

主要看ActivityThread类

bind Application的方法

handleBindApplication(AppBindData data)

内部代码块

try {4524            // If the app is being launched for full backup or restore, bring it up in4525            // a restricted environment with the base application class.4526            Application app = data.info.makeApplication(data.restrictedBackupMode, null);4527            mInitialApplication = app;45284529            // don't bring up providers in restricted mode; they may depend on the4530            // app's custom Application class4531            if (!data.restrictedBackupMode) {4532                List providers = data.providers;4533                if (providers != null) {4534                    installContentProviders(app, providers);   //继续跟踪这个做了哪些事情4535                    // For process that contains content providers, we want to4536                    // ensure that the JIT is enabled "at some point".4537                    mH.sendEmptyMessageDelayed(H.ENABLE_JIT, 10*1000);4538                }4539            }45404541            // Do this after providers, since instrumentation tests generally start their4542            // 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            }45514552            try {4553                mInstrumentation.callApplicationOnCreate(app);   // 执行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            }

跟踪 installContentProviders(app, providers)

private void More ...installContentProviders(4581            Context context, List providers) {4582        final ArrayList results =4583            new ArrayList();45844585        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,  //继续跟踪这里4595                    false /*noisy*/, true /*noReleaseNeeded*/, true /*stable*/);4596            if (cph != null) {4597                cph.noReleaseNeeded = true;4598                results.add(cph);4599            }4600        }46014602        try {4603            ActivityManagerNative.getDefault().publishContentProviders(4604                getApplicationThread(), results);4605        } catch (RemoteException ex) {4606        }4607    }

跟踪 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); //继续跟踪这里5000            } catch (java.lang.Exception e) {5001                if (!mInstrumentation.onException(null, e)) {5002                    throw new RuntimeException(5003                            "Unable to get provider " + info.name5004                            + ": " + e.toString(), e);5005                }5006                return null;5007            }

跟踪 localProvider.attachInfo(c, info)

1674    private void More ...attachInfo(Context context, ProviderInfo info, boolean testing) {1675        mNoPerms = testing;16761677        /*1678         * Only allow it to be set once, so after the content service gives1679         * 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();  // 调用ContentProvider onCreate()1697        }1698    }

通过查看源码的方式验证ContentProvider onCreate()优先执行与 Application onCreate()