说明
因为一些原因，我们提供给客户的sdk，只能是jar包形式的，一些情况下，sdk里面有native库的时候，就不太方便操作了，此篇文章主要解决如何把so库放入jar包里面，如何打包成jar，以及如何加载。
1.如何把so库放入jar包
so库放入jar参考此文章ANDROID将SO库封装到JAR包中并加载其中的SO库
将so库改成.jet后缀，放置和加载so库的SoLoader类同一个目录下面。
2.如何使用groovy打包jar
先把需要打包的class放置到同一个文件夹下面，然后打包即可，利用groovy的copy task完成这项工作非常简单。
3.如何加载jar包里面的so
3.1.首先判断当前jar里面是否存在so
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| InputStream inputStream = SoLoader.class.getResourceAsStream("/com/dianping/logan/arm64-v8a/liblogan.jet");
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如果inputStream不为空就表示存在。
3.2.拷贝
判断是否已经把so库拷贝到手机里面了，如果没有拷贝过就进行拷贝，这个代码逻辑很简单。
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| public class SoLoader {
private static final String TAG = "SoLoader";
public static String getPath() {
String path = GlobalCtx.getApp().getFilesDir().getAbsolutePath();
return path;
}
public static String get64SoFilePath() {
String path = SoLoader.getPath();
String v8a = path + File.separator + "jniLibs" + File.separator +
"arm64-v8a" + File.separator + "liblogan.so";
return v8a;
}
public static String get32SoFilePath() {
String path = SoLoader.getPath();
String v7a = path + File.separator + "jniLibs" + File.separator +
"armeabi-v7a" + File.separator + "liblogan.so";
return v7a;
}
public static boolean jarMode() {
boolean jarMode = false;
InputStream inputStream = SoLoader.class.getResourceAsStream("/com/dianping/logan/arm64-v8a/liblogan.jet");
if (inputStream != null) {
jarMode = true;
try {
inputStream.close();
} catch (IOException e) {
e.printStackTrace();
}
}
return jarMode;
}
public static boolean alreadyCopySo() {
String v8a = SoLoader.get64SoFilePath();
File file = new File(v8a);
if (file.exists()) {
String v7a = SoLoader.get32SoFilePath();
file = new File(v7a);
return file.exists();
}
return false;
}
public static boolean copyLoganJni() {
boolean load;
File dir = new File(getPath(), "jniLibs");
if (!dir.exists()) {
load = dir.mkdirs();
if (!load) {
return false;
}
}
File subdir = new File(dir, "arm64-v8a");
if (!subdir.exists()) {
load = subdir.mkdirs();
if (!load) {
return false;
}
}
File dest = new File(subdir, "liblogan.so");
load = copySo("/com/dianping/logan/arm64-v8a/liblogan.jet", dest);
if (load) {
subdir = new File(dir, "armeabi-v7a");
if (!subdir.exists()) {
load = subdir.mkdirs();
if (!load) {
return false;
}
}
dest = new File(subdir, "liblogan.so");
load = copySo("/com/dianping/logan/armeabi-v7a/liblogan.jet", dest);
}
return load;
}
public static boolean copySo(String name, File dest) {
InputStream inputStream = SoLoader.class.getResourceAsStream(name);
if (inputStream == null) {
Log.e(TAG, "inputStream == null");
return false;
}
boolean result = false;
FileOutputStream outputStream = null;
try {
outputStream = new FileOutputStream(dest);
int i;
byte[] buf = new byte[1024 * 4];
while ((i = inputStream.read(buf)) != -1) {
outputStream.write(buf, 0, i);
}
result = true;
} catch (IOException e) {
e.printStackTrace();
} finally {
try {
inputStream.close();
} catch (IOException e) {
e.printStackTrace();
}
if (outputStream != null) {
try {
outputStream.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
return result;
}
}
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3.3.加载
首先判断当前应用是32位还是64位Process.is64Bit();。然后加载对应的32或者64位的so。
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| static {
try {
if (SoLoader.jarMode()) {
if (SoLoader.alreadyCopySo()) {
sIsCloganOk = loadLocalSo();
} else {
boolean copyLoganJni = SoLoader.copyLoganJni();
if (copyLoganJni) {
sIsCloganOk = loadLocalSo();
}
}
} else {
System.loadLibrary(LIBRARY_NAME);
sIsCloganOk = true;
}
} catch (Throwable e) {
e.printStackTrace();
sIsCloganOk = false;
}
}
static boolean loadLocalSo() {
boolean bit = Process.is64Bit();
if (bit) {
String v8a = SoLoader.get64SoFilePath();
try {
System.load(v8a);
return true;
} catch (Throwable e) {
e.printStackTrace();
return false;
}
} else {
String v7a = SoLoader.get32SoFilePath();
try {
System.load(v7a);
return true;
} catch (Throwable e) {
e.printStackTrace();
return false;
}
}
}
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