private boolean validatePackageName()

in CommitContentSampleIME/app/src/main/java/com/example/android/commitcontent/ime/ImageKeyboard.java [135:185]
37 lines of code
9 McCabe index (conditional complexity)

    private boolean validatePackageName(@Nullable EditorInfo editorInfo) {
        if (editorInfo == null) {
            return false;
        }
        final String packageName = editorInfo.packageName;
        if (packageName == null) {
            return false;
        }

        // In Android L MR-1 and prior devices, EditorInfo.packageName is not a reliable identifier
        // of the target application because:
        //   1. the system does not verify it [1]
        //   2. InputMethodManager.startInputInner() had filled EditorInfo.packageName with
        //      view.getContext().getPackageName() [2]
        // [1]: https://android.googlesource.com/platform/frameworks/base/+/a0f3ad1b5aabe04d9eb1df8bad34124b826ab641
        // [2]: https://android.googlesource.com/platform/frameworks/base/+/02df328f0cd12f2af87ca96ecf5819c8a3470dc8
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
            return true;
        }

        final InputBinding inputBinding = getCurrentInputBinding();
        if (inputBinding == null) {
            // Due to b.android.com/225029, it is possible that getCurrentInputBinding() returns
            // null even after onStartInputView() is called.
            // TODO: Come up with a way to work around this bug....
            Log.e(TAG, "inputBinding should not be null here. "
                    + "You are likely to be hitting b.android.com/225029");
            return false;
        }
        final int packageUid = inputBinding.getUid();

        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {
            final AppOpsManager appOpsManager =
                    (AppOpsManager) getSystemService(Context.APP_OPS_SERVICE);
            try {
                appOpsManager.checkPackage(packageUid, packageName);
            } catch (Exception e) {
                return false;
            }
            return true;
        }

        final PackageManager packageManager = getPackageManager();
        final String possiblePackageNames[] = packageManager.getPackagesForUid(packageUid);
        for (final String possiblePackageName : possiblePackageNames) {
            if (packageName.equals(possiblePackageName)) {
                return true;
            }
        }
        return false;
    }