62 lines
2.5 KiB
Java
62 lines
2.5 KiB
Java
/*
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* Copyright (C) 2010 Ryszard Wiśniewski <brut.alll@gmail.com>
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* Copyright (C) 2010 Connor Tumbleson <connor.tumbleson@gmail.com>
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* https://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package brut.androlib.res.decoder;
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import android.util.TypedValue;
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import java.util.regex.Pattern;
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/**
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* AXmlResourceParser specifically for parsing encoded AndroidManifest.xml.
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*/
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public class AndroidManifestResourceParser extends AXmlResourceParser {
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/**
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* Pattern for matching numeric string meta-data values. aapt automatically infers the
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* type for a manifest meta-data value based on the string in the unencoded XML. However,
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* some apps intentionally coerce integers to be strings by prepending an escaped space.
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* For details/discussion, see https://stackoverflow.com/questions/2154945/how-to-force-a-meta-data-value-to-type-string
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* With aapt1, the escaped space is dropped when encoded. For aapt2, the escaped space is preserved.
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*/
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private static final Pattern PATTERN_NUMERIC_STRING = Pattern.compile("\\s?\\d+");
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@Override
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public String getAttributeValue(int index) {
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String value = super.getAttributeValue(index);
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if (value == null) {
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return "";
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}
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if (!isNumericStringMetadataAttributeValue(index, value)) {
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return value;
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}
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// Patch the numeric string value by prefixing it with an escaped space.
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// Otherwise, when the decoded app is rebuilt, aapt will incorrectly encode
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// the value as an int or float (depending on aapt version), breaking the original
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// app functionality.
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return "\\ " + value.trim();
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}
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private boolean isNumericStringMetadataAttributeValue(int index, String value) {
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return "meta-data".equalsIgnoreCase(super.getName())
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&& "value".equalsIgnoreCase(super.getAttributeName(index))
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&& super.getAttributeValueType(index) == TypedValue.TYPE_STRING
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&& PATTERN_NUMERIC_STRING.matcher(value).matches();
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}
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}
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