android-ndk

问题 I have a .so file provided by a third-party vendor that is to be included in my Android application. I do not have access to the source code nor can I (easily) contact the vendor. Is there a way for me to figure out by examining the .so file whether or not it was compiled targeting the armeabi or armeabi-v7a ABI? I'm asking for two reasons. First, I prefer for it to have been compiled targeting the armeabi-v7a ABI to get the improved performance compared to armeabi; knowing this will give me

问题 I have a .so file provided by a third-party vendor that is to be included in my Android application. I do not have access to the source code nor can I (easily) contact the vendor. Is there a way for me to figure out by examining the .so file whether or not it was compiled targeting the armeabi or armeabi-v7a ABI? I'm asking for two reasons. First, I prefer for it to have been compiled targeting the armeabi-v7a ABI to get the improved performance compared to armeabi; knowing this will give me

问题 I am getting the above error My gradle looks like this apply plugin: 'com.android.application' apply plugin: 'kotlin-android' apply plugin: 'kotlin-android-extensions' android { compileSdkVersion 29 buildToolsVersion "29.0.3" defaultConfig { applicationId "com.example.hypersignwalletcorekotlin" minSdkVersion 23 targetSdkVersion 29 versionCode 1 versionName "1.0" testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner" } buildTypes { release { minifyEnabled false proguardFiles

问题 When i follow instructions here, i get this error when running latest instruction that is "make": make[1]: Entering directory '/home/fasegiar/Downloads/openconnect-8.08' CC libopenconnect_la-ssl.lo In file included from ssl.c:41: In file included from ./openconnect-internal.h:102: In file included from /usr/include/libxml2/libxml/tree.h:1307: In file included from /usr/include/libxml2/libxml/xmlmemory.h:218: In file included from /usr/include/libxml2/libxml/threads.h:35: In file included from

问题 I am using NDK and I need to read resource media file. So, as far as I understand in order to access to resources I need to use AAssetManager , and eventually I need to get std::basic_istream to work with it. So, question is, how to get std::basic_istream from AAssetManager ? 回答1: The answer is actually very different whether you have a compressed asset (e.g. text) or uncompressed (by default, Jpeg images and mp3 are stored by the packer). For these uncompressed assets, you can get the file

问题 I have a Kotlin class which just declare some methods for interaction of Kotlin and C/C++ : class JNILib { companion object { external fun getAppId(): String init { System.loadLibrary("native-code") } } } But I have a problem when declaring the native method. I tried extern "C" JNIEXPORT jstring JNICALL Java_com_package_JNILib_getAppId( JNIEnv *env, jobject /* this */){ // wrong } extern "C" JNIEXPORT jstring JNICALL Java_com_package_JNILib_Companion_getAppId( JNIEnv *env, jobject /* this */)

问题 I have a Kotlin class which just declare some methods for interaction of Kotlin and C/C++ : class JNILib { companion object { external fun getAppId(): String init { System.loadLibrary("native-code") } } } But I have a problem when declaring the native method. I tried extern "C" JNIEXPORT jstring JNICALL Java_com_package_JNILib_getAppId( JNIEnv *env, jobject /* this */){ // wrong } extern "C" JNIEXPORT jstring JNICALL Java_com_package_JNILib_Companion_getAppId( JNIEnv *env, jobject /* this */)

问题 I have a Kotlin class which just declare some methods for interaction of Kotlin and C/C++ : class JNILib { companion object { external fun getAppId(): String init { System.loadLibrary("native-code") } } } But I have a problem when declaring the native method. I tried extern "C" JNIEXPORT jstring JNICALL Java_com_package_JNILib_getAppId( JNIEnv *env, jobject /* this */){ // wrong } extern "C" JNIEXPORT jstring JNICALL Java_com_package_JNILib_Companion_getAppId( JNIEnv *env, jobject /* this */)

问题 After upgrading to macOS Catalina, my project won't build anymore. This is due to Catalina believing the binaries in 'android-ndk-r17c' to not be from a trusted developer. You get messages such as: "“ld” cannot be opened because the developer cannot be verified." "macOS cannot verify that this app is free from malware" I have to use the old NDK due to problems with native openCV library SDK and newer NDKs. They are working on it, but the newer SDK is not stable enough for me yet. I was able

问题 When I link the C++ project with gradle it comes an error. Project Structure SDK Tools How can I solve this error? 来源： https://stackoverflow.com/questions/60716381/when-i-link-the-c-project-with-gradle-it-comes-an-error