[android-developers] Re: how to load a .so library in a apk?
I'm not sure about this, since I haven't done it myself, but I've heard that some people place the libraries under res/raw, and then they copy it to /data/data/your-package-name when it's first started. On 4 Aug, 04:53, "xuxiake2...@gmail.com" wrote: > I have a .so library ,which I had put in directory "assets" . But > how can i load it ? > > I can't use System.loadLibrary or System.load because i can't get the > path. thanks > > in advance for your answers. --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups "Android Developers" group. To post to this group, send email to android-developers@googlegroups.com To unsubscribe from this group, send email to android-developers-unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/android-developers?hl=en -~--~~~~--~~--~--~---
[android-developers] Re: how to load a .so library in a apk?
yes，I have already did this .
private void loadLibraryFromAssets() {
AssetManager am = getAssets();
String path = null;
try {
InputStream in;
in = am.open("lib/libjni_xxx.so");
BufferedInputStream bis = new BufferedInputStream(in);
path = Enviroment.getAppPath(this) + "libjni_xxx.so";
File file = new File(path);
if (!file.exists()) {
file.createNewFile();
}
FileOutputStream out = new FileOutputStream(path);
byte[] temp = new byte[2048];
while (bis.read(temp) > 0) {
out.write(temp);
}
bis.close();
out.close();
//am.close(); can't be closed
} catch (IOException e) {
e.printStackTrace();
Log.e(TAG,"load Library From Assets error: " +
e.getMessage());
}
try {
System.load(path);
} catch (UnsatisfiedLinkError e) {
String errorMsg = e.getMessage();
Log.e(TAG,"System.load error: " + errorMsg);
} catch (SecurityException e) {
String errorMsg = e.getMessage();
Log.e(TAG,"System.load error: " + errorMsg);
}
}
On 8月4日, 下午3时03分, Kaj Bjurman wrote:
> I'm not sure about this, since I haven't done it myself, but I've
> heard that some people place the libraries under res/raw, and then
> they copy it to /data/data/your-package-name when it's first started.
>
> On 4 Aug, 04:53, "xuxiake2...@gmail.com"
> wrote:
>
>
>
> > I have a .so library ,which I had put in directory "assets" . But
> > how can i load it ?
>
> > I can't use System.loadLibrary or System.load because i can't get the
> > path. thanks
>
> > in advance for your answers.- 隐藏被引用文字 -
>
> - 显示引用的文字 -
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[android-developers] Re: how to load a .so library in a apk?
That code contains at least one bug.
This loop isn't correct:
> while (bis.read(temp) > 0) {
>out.write(temp);
> }
bis.read returns the number of bytes that was read, that number can be
larger than 0 but still less than temp.length. You should do something
like this instead:
int len = 0;
while (( len = bis.read(temp)) > 0) {
out.write(temp, 0, len);
}
Your file wile otherwise be corrupt.
On 4 Aug, 13:14, spark wrote:
> yes，I have already did this .
>
> private void loadLibraryFromAssets() {
> AssetManager am = getAssets();
> String path = null;
> try {
> InputStream in;
> in = am.open("lib/libjni_xxx.so");
>
> BufferedInputStream bis = new BufferedInputStream(in);
>
> path = Enviroment.getAppPath(this) + "libjni_xxx.so";
>
> File file = new File(path);
>
> if (!file.exists()) {
> file.createNewFile();
> }
>
> FileOutputStream out = new FileOutputStream(path);
> byte[] temp = new byte[2048];
> while (bis.read(temp) > 0) {
> out.write(temp);
> }
> bis.close();
> out.close();
>
> //am.close(); can't be closed
> } catch (IOException e) {
> e.printStackTrace();
> Log.e(TAG,"load Library From Assets error: " +
> e.getMessage());
> }
>
> try {
> System.load(path);
> } catch (UnsatisfiedLinkError e) {
> String errorMsg = e.getMessage();
> Log.e(TAG,"System.load error: " + errorMsg);
> } catch (SecurityException e) {
> String errorMsg = e.getMessage();
> Log.e(TAG,"System.load error: " + errorMsg);
> }
>
> }
>
> On 8月4日, 下午3时03分, Kaj Bjurman wrote:
>
>
>
> > I'm not sure about this, since I haven't done it myself, but I've
> > heard that some people place the libraries under res/raw, and then
> > they copy it to /data/data/your-package-name when it's first started.
>
> > On 4 Aug, 04:53, "xuxiake2...@gmail.com"
> > wrote:
>
> > > I have a .so library ,which I had put in directory "assets" . But
> > > how can i load it ?
>
> > > I can't use System.loadLibrary or System.load because i can't get the
> > > path. thanks
>
> > > in advance for your answers.- 隐藏被引用文字 -
>
> > - 显示引用的文字 -
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[android-developers] Re: how to load a .so library in a apk?
I putted my created .so file into libs/armeabi/ I reccomend you download Android NDK . http://developer.android.com/sdk/ndk/1.5_r1/index.html and ask Android NDK Group is better. http://groups.google.com/group/android-ndk thanks On 8月4日, 午後4:03, Kaj Bjurman wrote: > I'm not sure about this, since I haven't done it myself, but I've > heard that some people place the libraries under res/raw, and then > they copy it to /data/data/your-package-name when it's first started. > > On 4 Aug, 04:53, "xuxiake2...@gmail.com" > wrote: > > > > > I have a .so library ,which I had put in directory "assets" . But > > how can i load it ? > > > I can't use System.loadLibrary or System.load because i can't get the > > path. thanks > > > in advance for your answers. --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups "Android Developers" group. To post to this group, send email to android-developers@googlegroups.com To unsubscribe from this group, send email to android-developers-unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/android-developers?hl=en -~--~~~~--~~--~--~---
