Android target SDK > 28 can no longer execute binaries in the data directory.

[myisduy]

Describe the issue

From android 10 version, we cannot execute binary file without root permission. If they set targetSDK = 28, they cannot be released on the play store.

Expected behavior

Any method that integrates the engine

Steps to reproduce

public class Engine { public Engine(File engineFile) { String command = engineFile.getAbsolutePath(); try { Process process = Runtime.getRuntime().exec(command);

        InputStream inputStream = process.getInputStream();
        BufferedReader reader = new BufferedReader(new InputStreamReader(inputStream));

        String line;
        while ((line = reader.readLine()) != null) {

            Log.i("enginechess", line);
        }

        int exitCode = process.waitFor();
        Log.i("enginechess", "Exit code: " + exitCode);
    } catch (IOException | InterruptedException e) {
        e.printStackTrace();
    }

}

Anything else?

No response

Operating system

Android

Pikafish version

Pikafish 2023-03-05

[PikaCat-OuO]

Ask about this issue in the upstream repo(https://github.com/official-stockfish/Stockfish) and see if there are any actions that need to be done. The NDK version Pikafish uses is fully synced with Stockfish.

[Liberations]

1.change name to libpikafish.so . move to project app/src/main/jniLibs/arm64-v8a 2.pikafish.nnue to assets/pikafish.nnue

        String apkFilePath = getPackageCodePath();
        // 推断lib目录路径
        LIB_PATH = apkFilePath.substring(0, apkFilePath.lastIndexOf("/")) + "/lib/arm64";
        File cacheDir = getCacheDir();
        String outputFilePath = cacheDir.getAbsolutePath() + File.separator + "pikafish.nnue";
        ENGIN_PATH = outputFilePath;
        Log.d(TAG, "lib目录路径: " + LIB_PATH);
        Log.d(TAG, "引擎路径: " + ENGIN_PATH);
        // 解压NNUE;
        AssetUtils.extractAssetFile(this, "pikafish.nnue");

3. Runtime.getRuntime().exec(LIB_PATH + "/libpikafish.so")

[PikaCat-OuO]

I'll mark this as resolved now.