diff --git a/Android/AndroidJNIBasics/.gitignore b/Android/AndroidJNIBasics/.gitignore new file mode 100644 index 000000000..2b75303ac --- /dev/null +++ b/Android/AndroidJNIBasics/.gitignore @@ -0,0 +1,13 @@ +*.iml +.gradle +/local.properties +/.idea/caches +/.idea/libraries +/.idea/modules.xml +/.idea/workspace.xml +/.idea/navEditor.xml +/.idea/assetWizardSettings.xml +.DS_Store +/build +/captures +.externalNativeBuild diff --git a/Android/AndroidJNIBasics/app/.gitignore b/Android/AndroidJNIBasics/app/.gitignore new file mode 100644 index 000000000..796b96d1c --- /dev/null +++ b/Android/AndroidJNIBasics/app/.gitignore @@ -0,0 +1 @@ +/build diff --git a/Android/AndroidJNIBasics/app/build.gradle b/Android/AndroidJNIBasics/app/build.gradle new file mode 100644 index 000000000..b3dad1277 --- /dev/null +++ b/Android/AndroidJNIBasics/app/build.gradle @@ -0,0 +1,39 @@ +apply plugin: 'com.android.application' + +android { + compileSdkVersion 28 + defaultConfig { + applicationId "com.journaldev.androidjnibasics" + minSdkVersion 25 + targetSdkVersion 28 + versionCode 1 + versionName "1.0" + testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner" + externalNativeBuild { + cmake { + cppFlags "" + } + } + } + buildTypes { + release { + minifyEnabled false + proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro' + } + } + externalNativeBuild { + cmake { + path "src/main/cpp/CMakeLists.txt" + version "3.10.2" + } + } +} + +dependencies { + implementation fileTree(dir: 'libs', include: ['*.jar']) + implementation 'com.android.support:appcompat-v7:28.0.0' + implementation 'com.android.support.constraint:constraint-layout:1.1.3' + testImplementation 'junit:junit:4.12' + androidTestImplementation 'com.android.support.test:runner:1.0.2' + androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.2' +} diff --git a/Android/AndroidJNIBasics/app/proguard-rules.pro b/Android/AndroidJNIBasics/app/proguard-rules.pro new file mode 100644 index 000000000..f1b424510 --- /dev/null +++ b/Android/AndroidJNIBasics/app/proguard-rules.pro @@ -0,0 +1,21 @@ +# Add project specific ProGuard rules here. +# You can control the set of applied configuration files using the +# proguardFiles setting in build.gradle. +# +# For more details, see +# http://developer.android.com/guide/developing/tools/proguard.html + +# If your project uses WebView with JS, uncomment the following +# and specify the fully qualified class name to the JavaScript interface +# class: +#-keepclassmembers class fqcn.of.javascript.interface.for.webview { +# public *; +#} + +# Uncomment this to preserve the line number information for +# debugging stack traces. +#-keepattributes SourceFile,LineNumberTable + +# If you keep the line number information, uncomment this to +# hide the original source file name. +#-renamesourcefileattribute SourceFile diff --git a/Android/AndroidJNIBasics/app/src/androidTest/java/com/journaldev/androidjnibasics/ExampleInstrumentedTest.java b/Android/AndroidJNIBasics/app/src/androidTest/java/com/journaldev/androidjnibasics/ExampleInstrumentedTest.java new file mode 100644 index 000000000..5fb05ed4f --- /dev/null +++ b/Android/AndroidJNIBasics/app/src/androidTest/java/com/journaldev/androidjnibasics/ExampleInstrumentedTest.java @@ -0,0 +1,26 @@ +package com.journaldev.androidjnibasics; + +import android.content.Context; +import android.support.test.InstrumentationRegistry; +import android.support.test.runner.AndroidJUnit4; + +import org.junit.Test; +import org.junit.runner.RunWith; + +import static org.junit.Assert.*; + +/** + * Instrumented test, which will execute on an Android device. + * + * @see Testing documentation + */ +@RunWith(AndroidJUnit4.class) +public class ExampleInstrumentedTest { + @Test + public void useAppContext() { + // Context of the app under test. + Context appContext = InstrumentationRegistry.getTargetContext(); + + assertEquals("com.journaldev.androidjnibasics", appContext.getPackageName()); + } +} diff --git a/Android/AndroidJNIBasics/app/src/main/AndroidManifest.xml b/Android/AndroidJNIBasics/app/src/main/AndroidManifest.xml new file mode 100644 index 000000000..f70363aa9 --- /dev/null +++ b/Android/AndroidJNIBasics/app/src/main/AndroidManifest.xml @@ -0,0 +1,21 @@ + + + + + + + + + + + + + + \ No newline at end of file diff --git a/Android/AndroidJNIBasics/app/src/main/cpp/CMakeLists.txt b/Android/AndroidJNIBasics/app/src/main/cpp/CMakeLists.txt new file mode 100644 index 000000000..0e7206b8b --- /dev/null +++ b/Android/AndroidJNIBasics/app/src/main/cpp/CMakeLists.txt @@ -0,0 +1,44 @@ +# For more information about using CMake with Android Studio, read the +# documentation: https://d.android.com/studio/projects/add-native-code.html + +# Sets the minimum version of CMake required to build the native library. + +cmake_minimum_required(VERSION 3.4.1) + +# Creates and names a library, sets it as either STATIC +# or SHARED, and provides the relative paths to its source code. +# You can define multiple libraries, and CMake builds them for you. +# Gradle automatically packages shared libraries with your APK. + +add_library( # Sets the name of the library. + native-lib + + # Sets the library as a shared library. + SHARED + + # Provides a relative path to your source file(s). + native-lib.cpp ) + +# Searches for a specified prebuilt library and stores the path as a +# variable. Because CMake includes system libraries in the search path by +# default, you only need to specify the name of the public NDK library +# you want to add. CMake verifies that the library exists before +# completing its build. + +find_library( # Sets the name of the path variable. + log-lib + + # Specifies the name of the NDK library that + # you want CMake to locate. + log ) + +# Specifies libraries CMake should link to your target library. You +# can link multiple libraries, such as libraries you define in this +# build script, prebuilt third-party libraries, or system libraries. + +target_link_libraries( # Specifies the target library. + native-lib + + # Links the target library to the log library + # included in the NDK. + ${log-lib} ) diff --git a/Android/AndroidJNIBasics/app/src/main/cpp/native-lib.cpp b/Android/AndroidJNIBasics/app/src/main/cpp/native-lib.cpp new file mode 100644 index 000000000..af4589d0b --- /dev/null +++ b/Android/AndroidJNIBasics/app/src/main/cpp/native-lib.cpp @@ -0,0 +1,68 @@ +#include +#include +#include +#include + +extern "C" JNIEXPORT jstring JNICALL +Java_com_journaldev_androidjnibasics_MainActivity_stringFromJNI( + JNIEnv* env, + jobject /* this */) { + std::string hello = "Hello from C++"; + + __android_log_write(ANDROID_LOG_DEBUG, "API123", "Debug Log"); + + return env->NewStringUTF(hello.c_str()); +} + + +extern "C" JNIEXPORT jstring JNICALL +Java_com_journaldev_androidjnibasics_MainActivity_sendYourName( + JNIEnv* env, + jobject, jstring firstName, jstring lastName) { + char returnString[20]; + const char *fN = env->GetStringUTFChars(firstName, NULL); + const char *lN = env->GetStringUTFChars(lastName, NULL); + + + + + + strcpy(returnString,fN); // copy string one into the result. + strcat(returnString,lN); // append string two to the result. + + env->ReleaseStringUTFChars(firstName, fN); + env->ReleaseStringUTFChars(lastName, lN); + + __android_log_write(ANDROID_LOG_DEBUG, "API123", returnString); + + return env->NewStringUTF(returnString); +} + +extern "C" +JNIEXPORT jobjectArray JNICALL Java_com_journaldev_androidjnibasics_MainActivity_stringArrayFromJNI(JNIEnv *env, jobject jobj) +{ + + char *days[]={"Java", + "Android", + "Django", + "SQL", + "Swift", + "Kotlin", + "Springs"}; + + jstring str; + jobjectArray day = 0; + jsize len = 7; + int i; + + day = env->NewObjectArray(len,env->FindClass("java/lang/String"),0); + + for(i=0;i<7;i++) + { + str = env->NewStringUTF(days[i]); + env->SetObjectArrayElement(day,i,str); + } + + return day; +} + diff --git a/Android/AndroidJNIBasics/app/src/main/java/com/journaldev/androidjnibasics/MainActivity.java b/Android/AndroidJNIBasics/app/src/main/java/com/journaldev/androidjnibasics/MainActivity.java new file mode 100644 index 000000000..f87a5d1bb --- /dev/null +++ b/Android/AndroidJNIBasics/app/src/main/java/com/journaldev/androidjnibasics/MainActivity.java @@ -0,0 +1,59 @@ +package com.journaldev.androidjnibasics; + +import android.support.v7.app.AppCompatActivity; +import android.os.Bundle; +import android.view.View; +import android.widget.Button; +import android.widget.TextView; +import android.widget.Toast; + +public class MainActivity extends AppCompatActivity { + + // Used to load the 'native-lib' library on application startup. + static { + System.loadLibrary("native-lib"); + } + + Button btnJNI, btnJNIStringArray; + + @Override + protected void onCreate(Bundle savedInstanceState) { + super.onCreate(savedInstanceState); + setContentView(R.layout.activity_main); + + // Example of a call to a native method + TextView tv = findViewById(R.id.sample_text); + tv.setText(stringFromJNI()); + + btnJNI = findViewById(R.id.btnJni); + btnJNIStringArray = findViewById(R.id.btnJniStringArray); + btnJNI.setOnClickListener(new View.OnClickListener() { + @Override + public void onClick(View v) { + String result = sendYourName("Anupam", "Chugh"); + Toast.makeText(getApplicationContext(), "Result from JNI is " + result, Toast.LENGTH_LONG).show(); + } + }); + + btnJNIStringArray.setOnClickListener(new View.OnClickListener() { + @Override + public void onClick(View v) { + String[] strings = stringArrayFromJNI(); + + Toast.makeText(getApplicationContext(), "First element is "+strings[0], Toast.LENGTH_LONG).show(); + + } + }); + + } + + /** + * A native method that is implemented by the 'native-lib' native library, + * which is packaged with this application. + */ + public native String stringFromJNI(); + public native String sendYourName(String firstName, String lastName); + public native String[] stringArrayFromJNI(); + + +} diff --git a/Android/AndroidJNIBasics/app/src/main/res/drawable-v24/ic_launcher_foreground.xml b/Android/AndroidJNIBasics/app/src/main/res/drawable-v24/ic_launcher_foreground.xml new file mode 100644 index 000000000..1f6bb2906 --- /dev/null +++ b/Android/AndroidJNIBasics/app/src/main/res/drawable-v24/ic_launcher_foreground.xml @@ -0,0 +1,34 @@ + + + + + + + + + + + diff --git a/Android/AndroidJNIBasics/app/src/main/res/drawable/ic_launcher_background.xml b/Android/AndroidJNIBasics/app/src/main/res/drawable/ic_launcher_background.xml new file mode 100644 index 000000000..0d025f9bf --- /dev/null +++ b/Android/AndroidJNIBasics/app/src/main/res/drawable/ic_launcher_background.xml @@ -0,0 +1,170 @@ + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + diff --git a/Android/AndroidJNIBasics/app/src/main/res/layout/activity_main.xml b/Android/AndroidJNIBasics/app/src/main/res/layout/activity_main.xml new file mode 100644 index 000000000..23fbf9a7b --- /dev/null +++ b/Android/AndroidJNIBasics/app/src/main/res/layout/activity_main.xml @@ -0,0 +1,44 @@ + + + + + +