加載so有兩種方法

System.load() 和System.loadLibrary(); 前者需傳入庫文件的絕對路徑，后者只需傳入庫文件名。

首先我的jar包目錄如下：

Loader是加載類：

static {

try {

InputStream is = null;

if(isCPUInfo64()) {

is = Loader.class.getResource("arm64/libhellojni.so").openStream();

}else {

is = Loader.class.getResource("arm32/libhellojni.so").openStream();

}

File tempFile = File.createTempFile("hellojni", ".so");

FileOutputStream fos = new FileOutputStream(tempFile);

int i;

byte[] buf = new byte[1024];

while ((i = is.read(buf)) != -1) {

fos.write(buf, 0, i);

}

is.close();

fos.close();

System.load(tempFile.getAbsolutePath());

tempFile.deleteOnExit();

} catch (IOException e) {

e.printStackTrace();

}

}

private static boolean isCPUInfo64() {

File cpuInfo = new File("/proc/cpuinfo");

if (cpuInfo != null && cpuInfo.exists()) {

InputStream inputStream = null;

BufferedReader bufferedReader = null;

try {

inputStream = new FileInputStream(cpuInfo);

bufferedReader = new BufferedReader(new InputStreamReader(inputStream), 512);

String line = bufferedReader.readLine();

if (line != null && line.length() > 0 && line.toLowerCase(Locale.US).contains("arch64")) {

return true;

} else {

return false;

}

} catch (Throwable t) {

Log.d("isCPUInfo64", " error = " + t.toString());

} finally {

try {

if (bufferedReader != null) {

bufferedReader.close();

}

if (inputStream != null) {

inputStream.close();

}

} catch (Exception e) {

e.printStackTrace();

}

}

}

return false;

}

總結

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