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上一篇文章 android系统中data下的xml乱码无法查看问题剖析及解决方法 发布后#xff0c;想要寻找一个可以直接把二进制xml和普通xml进行相互转换的#xff0c;当时还写了相关的方案#xff0c;但是当时没有找到现成的开源工具#xff0c;后来经过相关粉…背景
上一篇文章 android系统中data下的xml乱码无法查看问题剖析及解决方法 发布后想要寻找一个可以直接把二进制xml和普通xml进行相互转换的当时还写了相关的方案但是当时没有找到现成的开源工具后来经过相关粉丝提醒找到了和方法2一模一样思路的开源工具那就是abx2xml和xml2abx。
转化命令使用介绍abx2xml和xml2abx
转换前 属于二进制乱码 使用命令转换命令
abx2xml ./system/users/0/appwidgets.xml ./system/users/0/appwidgets-read.xml转化后的./system/users/0/appwidgets-read.xml变成我们常见的普通xml 同样普通xml也可以转成二进制xml转化命令
xml2abx ./system/users/0/appwidgets-read.xml ./system/users/0/appwidgets-binary.xml然后看看./system/users/0/appwidgets-binary.xml是不是变得二进制不可读了
abx2xml和xml2abx命令解析
abx2xml和xml2abx其实代码都是一样的本质就是个sh脚本而已运行的
#!/system/bin/sh
export CLASSPATH/system/framework/abx.jar
exec app_process /system/bin com.android.commands.abx.Abx $0 $
可以看出本质上都是调用到了Abx这个java类参数就是一个$0这个代表命令本身比如使用使用是 abx2xml input.xml output.xml 那么这里的 0 就是 a b x 2 x m l 后面 i n p u t . x m l o u t p u t . x m l 就是 0就是abx2xml后面input.xml output.xml就是 0就是abx2xml后面input.xmloutput.xml就是
源码剖析Abx类
public class Abx {private static final String USAGE usage: abx2xml [-i] input [output]\n usage: xml2abx [-i] input [output]\n\n Converts between human-readable XML and Android Binary XML.\n\n When invoked with the -i argument, the output of a successful conversion\n will overwrite the original input file. Input can be - to use stdin, and\n output can be - to use stdout.\n;private static InputStream openInput(String arg) throws IOException {if (-.equals(arg)) {return System.in;} else {return new FileInputStream(arg);}}private static OutputStream openOutput(String arg) throws IOException {if (-.equals(arg)) {return System.out;} else {return new FileOutputStream(arg);}}private static void mainInternal(String[] args) {if (args.length 2) {throw new IllegalArgumentException(Missing arguments);}final XmlPullParser in;final XmlSerializer out;if (args[0].endsWith(abx2xml)) {//这里根据传递近来参数看看是否要二进制xml转普通还是逆过来转in Xml.newBinaryPullParser(); //二进制转普通那么输入就是BinaryPullParser输出就是普通的out Xml.newSerializer();} else if (args[0].endsWith(xml2abx)) {in Xml.newPullParser();//普通转二进制那么输入就是普通的输出就是newBinarySerializerout Xml.newBinarySerializer();} else {throw new IllegalArgumentException(Unsupported conversion);}final boolean inPlace -i.equals(args[1]);final String inputArg inPlace ? args[2] : args[1];final String outputArg inPlace ? args[2] .tmp : args[2];try (InputStream is openInput(inputArg);OutputStream os openOutput(outputArg)) {in.setInput(is, StandardCharsets.UTF_8.name());//输入设置对应的流InputStreamout.setOutput(os, StandardCharsets.UTF_8.name());//输出设置对应的流OutputStreamout.setFeature(http://xmlpull.org/v1/doc/features.html#indent-output, true);Xml.copy(in, out);//再调用 Xml.copy重点就是在这out.flush();} catch (Exception e) {// Clean up failed output before throwingif (inPlace) {new File(outputArg).delete();}throw new IllegalStateException(e);}// Successful in-place conversion of a file requires a renameif (inPlace) {if (!new File(outputArg).renameTo(new File(inputArg))) {throw new IllegalStateException(Failed rename);}}}public static void main(String[] args) {try {mainInternal(args);System.exit(0);} catch (Exception e) {System.err.println(e.toString());System.err.println();System.err.println(USAGE);System.exit(1);}}
}
上面代码核心部分有注释其实整体算比较简单核心方法就剩下一个Xml.copy方法 XML的相关copy方法如下 /*** Copy the first XML document into the second document.* p* Implemented by reading all events from the given {link XmlPullParser}* and writing them directly to the given {link XmlSerializer}. This can be* useful for transparently converting between underlying wire protocols.** hide*/public static void copy(NonNull XmlPullParser in, NonNull XmlSerializer out)throws XmlPullParserException, IOException {// Some parsers may have already consumed the event that starts the// document, so we manually emit that event here for consistencyif (in.getEventType() XmlPullParser.START_DOCUMENT) {out.startDocument(in.getInputEncoding(), true);}while (true) {final int token in.nextToken();//不断循环xml的内容节点等简单说就是in读出什么就往out中写什么switch (token) {case XmlPullParser.START_DOCUMENT:out.startDocument(in.getInputEncoding(), true);break;case XmlPullParser.END_DOCUMENT:out.endDocument();return;case XmlPullParser.START_TAG:out.startTag(normalizeNamespace(in.getNamespace()), in.getName());for (int i 0; i in.getAttributeCount(); i) {out.attribute(normalizeNamespace(in.getAttributeNamespace(i)),in.getAttributeName(i), in.getAttributeValue(i));}break;case XmlPullParser.END_TAG:out.endTag(normalizeNamespace(in.getNamespace()), in.getName());break;case XmlPullParser.TEXT:out.text(in.getText());break;case XmlPullParser.CDSECT:out.cdsect(in.getText());break;case XmlPullParser.ENTITY_REF:out.entityRef(in.getName());break;case XmlPullParser.IGNORABLE_WHITESPACE:out.ignorableWhitespace(in.getText());break;case XmlPullParser.PROCESSING_INSTRUCTION:out.processingInstruction(in.getText());break;case XmlPullParser.COMMENT:out.comment(in.getText());break;case XmlPullParser.DOCDECL:out.docdecl(in.getText());break;default:throw new IllegalStateException(Unknown token token);}}}更多framework详细代码和资料参考如下链接
halperfettosurfaceflinger https://mp.weixin.qq.com/s/LbVLnu1udqExHVKxd74ILg
其他课程七件套专题 点击这里 https://mp.weixin.qq.com/s/Qv8zjgQ0CkalKmvi8tMGaw
视频试看 https://www.bilibili.com/video/BV1wc41117L4/
更多framework假威风耗androidframework007
