由于创建ContextImpl的基本原理类似，所以这里只会分析几个比较有代表性的地方：
1、 Application对应的Context
在应用程序启动时，都会创建一个Application对象，所以辗转调用到handleBindApplication（）方法。
private final void handleBindApplication(AppBindData data) {
mBoundApplication = data;
mConfiguration = new Configuration(data.config);
....
data.info = getPackageInfoNoCheck(data.appInfo);
...
Application app = data.info.makeApplication(data.restrictedBackupMode, null);
mInitialApplication = app;
....
}
其中data.info是LoadedApk类型的，到getPackageInfoNoCheck中看看源码
public final LoadedApk getPackageInfoNoCheck(ApplicationInfo ai) {
return getPackageInfo(ai, null, false, true);
}
里面其实调用的是getPackageInfo，继续跟进：
if (includeCode) {
ref = mPackages.get(aInfo.packageName);
} else {
ref = mResourcePackages.get(aInfo.packageName);
}
LoadedApk packageInfo = ref != null ? ref.get() : null;
if (packageInfo == null || (packageInfo.mResources != null
&& !packageInfo.mResources.getAssets().isUpToDate())) {
if (localLOGV) Slog.v(TAG, (includeCode ? "Loading code package "
: "Loading resource-only package ") + aInfo.packageName
+ " (in " + (mBoundApplication != null
? mBoundApplication.processName : null)
+ ")");
packageInfo =
new LoadedApk(this, aInfo, this, baseLoader,
securityViolation, includeCode &&
(aInfo.flags&ApplicationInfo.FLAG_HAS_CODE) != 0);
if (includeCode) {
mPackages.put(aInfo.packageName,
new WeakReference<LoadedApk>(packageInfo));
} else {
mResourcePackages.put(aInfo.packageName,
new WeakReference<LoadedApk>(packageInfo));
}
