通过jni实现图像处理的demo-AndroidStudio资源-CSDN下载

共619个文件

class：459个

xml：36个

txt：21个

Android

Studio,

jni,

图像处理

3星 · 超过75%的资源需积分: 31 157 浏览量 2017-02-19 18:38:51 上传评论 1 收藏 1.96MB RAR 举报

在Android开发中，JNI（Java Native Interface）是一个关键的技术，它允许Java代码和其他语言写的代码进行交互。这个“通过JNI实现图像处理的demo-Android Studio”项目，旨在演示如何利用JNI来增强Android应用的图像处理能力。下面我们将深入探讨相关的知识点。 Android Studio是Google推出的官方Android开发环境，它提供了集成开发环境（IDE）和一系列工具，便于开发者构建、调试和发布Android应用。相比Eclipse，Android Studio提供了更强大的功能，如Gradle构建系统、更好的代码编辑器、性能分析工具等。 JNI是Java平台的标准部分，它允许Java代码调用本地（非Java）代码，并且可以让本地代码调用Java方法。在图像处理领域，JNI常被用来调用C/C++库，因为这些语言在处理计算密集型任务如图像处理时，通常比Java更快。在这个项目中，我们可能会看到以下几个关键步骤： 1. **创建JNI接口**：在Java代码中，我们需要定义一些native方法，声明它们将在C/C++中实现。这些方法通常在Java类的`native`关键字前标注。 2. **生成头文件**：使用Android Studio的NDK（Native Development Kit）工具链，我们可以生成C/C++头文件（.h），其中包含了Java native方法的声明。这一步可以通过`javah`命令或Android Studio的“Generate C++ Header”功能完成。 3. **实现C/C++代码**：在生成的头文件中，我们将实现图像处理的逻辑。可能涉及到的库有OpenCV、Android Native API等，这些库提供了丰富的图像处理函数。 4. **链接库和应用**：使用Android.mk或CMakeLists.txt文件配置构建过程，将C/C++代码编译成一个动态链接库（.so）。这个库会被打包进APK，运行时由Android系统加载。 5. **调用JNI方法**：在Android应用中，通过Java的`System.loadLibrary`加载本地库，然后就可以调用之前声明的native方法了。 6. **图像数据传递**：JNI方法需要访问Java对象，例如Bitmap。Android提供了一种叫做`Bitmap`的Java对象，可以代表图像数据。在JNI中处理Bitmap，我们需要使用`JNIEnv`指针来获取Bitmap的原始字节数组，进行操作后，再将结果返回给Java层。 7. **性能优化**：由于JNI调用涉及到Java和本地代码之间的上下文切换，因此需要合理设计接口，减少不必要的数据拷贝，以提高效率。这个项目为开发者提供了一个实践JNI和图像处理的实例，有助于理解如何在Android应用中集成C/C++代码，提高性能，同时也能学习到Android Studio的相关使用技巧。对于有兴趣深入了解Android底层机制和优化的开发者来说，这是一个很好的学习资源。

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收起资源包目录

通过jni实现图像处理的demo-Android Studio （619个子文件）

7fICsdzQWDBkg14Ff9zC_Wq8iVo= 10KB

libstdc++.a 8B

resources-debug.ap_ 10KB

resources-debug-androidTest.ap_ 771B

app-debug.apk 360KB

gradlew.bat 2KB

fileSnapshots.bin 85KB

taskArtifacts.bin 58KB

fileHashes.bin 26KB

fileSnapshotsToTreeSnapshotsIndex.bin 21KB

localClassSetAnalysis.bin 20KB

localJarClasspathSnapshot.bin 18KB

ViewPager.class 48KB

FragmentManagerImpl.class 39KB

SlidingPaneLayout.class 25KB

Fragment.class 23KB

DrawerLayout.class 23KB

ViewDragHelper.class 20KB

FragmentActivity.class 19KB

AccessibilityNodeInfoCompat.class 15KB

BackStackRecord.class 15KB

PagerTitleStrip.class 12KB

ExploreByTouchHelper.class 11KB

LoaderManagerImpl.class 10KB

GestureDetectorCompat$GestureDetectorCompatImplBase.class 10KB

FileProvider.class 9KB

FragmentTabHost.class 9KB

LoaderManagerImpl$LoaderInfo.class 8KB

ModernAsyncTask.class 8KB

AccessibilityRecordCompat.class 8KB

LocalBroadcastManager.class 8KB

DialogFragment.class 8KB

AccessibilityNodeInfoCompat$AccessibilityNodeInfoStubImpl.class 7KB

NotificationCompat$Builder.class 7KB

ShareCompat$IntentBuilder.class 7KB

TransportMediator.class 7KB

TransportMediatorJellybeanMR2.class 7KB

CursorAdapter.class 7KB

ListFragment.class 7KB

PagerTabStrip.class 7KB

TaskStackBuilder.class 7KB

AccessibilityNodeInfoCompat$AccessibilityNodeInfoIcsImpl.class 6KB

NotificationCompatJellybean.class 6KB

ViewCompat.class 6KB

AccessibilityNodeInfoCompatIcs.class 6KB

FragmentStatePagerAdapter.class 6KB

ShareCompat$IntentReader.class 6KB

Loader.class 6KB

LruCache.class 6KB

AccessibilityRecordCompat$AccessibilityRecordIcsImpl.class 6KB

ActionBarDrawerToggle.class 6KB

SimpleCursorAdapter.class 6KB

AccessibilityRecordCompat$AccessibilityRecordStubImpl.class 6KB

LongSparseArray.class 6KB

DrawerLayout$ViewDragCallback.class 5KB

AccessibilityRecordCompatIcs.class 5KB

BidiFormatter.class 5KB

BackStackState.class 5KB

CursorLoader.class 5KB

SparseArrayCompat.class 5KB

ActionBarDrawerToggle$SlideDrawable.class 5KB

ViewCompat$BaseViewCompatImpl.class 5KB

AsyncTaskLoader.class 5KB

NavUtils.class 5KB

SearchViewCompat$SearchViewCompatHoneycombImpl.class 4KB

SearchViewCompatHoneycomb.class 4KB

MenuItemCompat.class 4KB

FileProvider$SimplePathStrategy.class 4KB

SlidingPaneLayout$AccessibilityDelegate.class 4KB

AccessibilityServiceInfoCompat.class 4KB

AccessibilityDelegateCompat.class 4KB

SearchViewCompat.class 4KB

ScrollerCompat.class 4KB

SlidingPaneLayout$DragHelperCallback.class 4KB

BidiFormatter$DirectionalityEstimator.class 4KB

TimeUtils.class 4KB

NotificationCompat$NotificationCompatImplJellybean.class 4KB

FragmentState.class 4KB

DrawerLayout$AccessibilityDelegate.class 4KB

FragmentPagerAdapter.class 4KB

AccessibilityDelegateCompat$AccessibilityDelegateJellyBeanImpl$1.class 4KB

NotificationCompatIceCreamSandwich.class 4KB

AtomicFile.class 4KB

AccessibilityDelegateCompat$AccessibilityDelegateIcsImpl.class 3KB

SearchViewCompat$SearchViewCompatStubImpl.class 3KB

NotificationCompatHoneycomb.class 3KB

AccessibilityManagerCompat$AccessibilityManagerIcsImpl.class 3KB

NavUtils$NavUtilsImplBase.class 3KB

ShareCompat.class 3KB

PagerAdapter.class 3KB

ScrollerCompat$ScrollerCompatImplBase.class 3KB

AccessibilityEventCompat.class 3KB

AccessibilityDelegateCompatJellyBean$1.class 3KB

ActionBarDrawerToggleHoneycomb.class 3KB

ScrollerCompat$ScrollerCompatImplGingerbread.class 3KB

AccessibilityNodeProviderCompat$AccessibilityNodeProviderJellyBeanImpl$1.class 3KB

AccessibilityDelegateCompatIcs.class 3KB

共 619 条

md "F:\android\workspase_AS\PictureProcess\app\build\intermediates\ndkBuild\release\obj\local\armeabi-v7a\objs\PictureProcess" >NUL 2>NUL || rem F:/android/sdk1/ndk-bundle/build//../prebuilt/windows-x86_64/bin/echo.exe [armeabi-v7a] "Compile++ thumb": "PictureProcess <= PictureProcess.cpp" F:/android/sdk1/ndk-bundle/build//../toolchains/llvm/prebuilt/windows-x86_64/bin/clang++.exe -MMD -MP -MF F:/android/workspase_AS/PictureProcess/app/build/intermediates/ndkBuild/release/obj/local/armeabi-v7a/objs/PictureProcess/PictureProcess.o.d -gcc-toolchain F:/android/sdk1/ndk-bundle/build//../toolchains/arm-linux-androideabi-4.9/prebuilt/windows-x86_64 -fpic -ffunction-sections -funwind-tables -fstack-protector-strong -Wno-invalid-command-line-argument -Wno-unused-command-line-argument -no-canonical-prefixes -fno-integrated-as -g -target armv7-none-linux-androideabi -march=armv7-a -mfloat-abi=softfp -mfpu=vfpv3-d16 -fno-exceptions -fno-rtti -mthumb -Os -DNDEBUG -IF:/android/workspase_AS/PictureProcess/app/src/main/jni/ -IF:/android/workspase_AS/PictureProcess/app/src/main/jni/include/ -IF:/android/workspase_AS/PictureProcess/app/src/main/jni/src/ -IF:/android/sdk1/ndk-bundle/build//../sources/cxx-stl/system/include -IF:/android/workspase_AS/PictureProcess/app/src/main/jni -DANDROID -Wa,--noexecstack -Wformat -Werror=format-security -isystem F:/android/sdk1/ndk-bundle/build//../platforms/android-14/arch-arm/usr/include -c F:/android/workspase_AS/PictureProcess/app/src/main/jni/PictureProcess.cpp -o F:/android/workspase_AS/PictureProcess/app/build/intermediates/ndkBuild/release/obj/local/armeabi-v7a/objs/PictureProcess/PictureProcess.o md "F:\android\workspase_AS\PictureProcess\app\build\intermediates\ndkBuild\release\obj\local\armeabi-v7a\objs\PictureProcess\src" >NUL 2>NUL || rem F:/android/sdk1/ndk-bundle/build//../prebuilt/windows-x86_64/bin/echo.exe [armeabi-v7a] "Compile++ thumb": "PictureProcess <= AlgFunc.cpp" F:/android/sdk1/ndk-bundle/build//../toolchains/llvm/prebuilt/windows-x86_64/bin/clang++.exe -MMD -MP -MF F:/android/workspase_AS/PictureProcess/app/build/intermediates/ndkBuild/release/obj/local/armeabi-v7a/objs/PictureProcess/src/AlgFunc.o.d -gcc-toolchain F:/android/sdk1/ndk-bundle/build//../toolchains/arm-linux-androideabi-4.9/prebuilt/windows-x86_64 -fpic -ffunction-sections -funwind-tables -fstack-protector-strong -Wno-invalid-command-line-argument -Wno-unused-command-line-argument -no-canonical-prefixes -fno-integrated-as -g -target armv7-none-linux-androideabi -march=armv7-a -mfloat-abi=softfp -mfpu=vfpv3-d16 -fno-exceptions -fno-rtti -mthumb -Os -DNDEBUG -IF:/android/workspase_AS/PictureProcess/app/src/main/jni/ -IF:/android/workspase_AS/PictureProcess/app/src/main/jni/include/ -IF:/android/workspase_AS/PictureProcess/app/src/main/jni/src/ -IF:/android/sdk1/ndk-bundle/build//../sources/cxx-stl/system/include -IF:/android/workspase_AS/PictureProcess/app/src/main/jni -DANDROID -Wa,--noexecstack -Wformat -Werror=format-security -isystem F:/android/sdk1/ndk-bundle/build//../platforms/android-14/arch-arm/usr/include -c F:/android/workspase_AS/PictureProcess/app/src/main/jni/src/AlgFunc.cpp -o F:/android/workspase_AS/PictureProcess/app/build/intermediates/ndkBuild/release/obj/local/armeabi-v7a/objs/PictureProcess/src/AlgFunc.o md "F:\android\workspase_AS\PictureProcess\app\build\intermediates\ndkBuild\release\obj\local\armeabi-v7a" >NUL 2>NUL || rem F:/android/sdk1/ndk-bundle/build//../prebuilt/windows-x86_64/bin/echo.exe [armeabi-v7a] "StaticLibrary ": "libstdc++.a" F:/android/sdk1/ndk-bundle/build//../toolchains/arm-linux-androideabi-4.9/prebuilt/windows-x86_64/bin/arm-linux-androideabi-ar crsD F:/android/workspase_AS/PictureProcess/app/build/intermediates/ndkBuild/release/obj/local/armeabi-v7a/libstdc++.a F:/android/sdk1/ndk-bundle/build//../prebuilt/windows-x86_64/bin/echo.exe [armeabi-v7a] "SharedLibrary ": "libPictureProcess.so" F:/android/sdk1/ndk-bundle/build//../toolchains/llvm/prebuilt/windows-x86_64/bin/clang++.exe -Wl,-soname,libPictureProcess.so -shared --sysroot=F:/android/sdk1/ndk-bundle/build//../platforms/android-14/arch-arm F:/android/workspase_AS/PictureProcess/app/build/intermediates/ndkBuild/release/obj/local/armeabi-v7a/objs/PictureProcess/PictureProcess.o F:/android/workspase_AS/PictureProcess/app/build/intermediates/ndkBuild/release/obj/local/armeabi-v7a/objs/PictureProcess/src/AlgFunc.o F:/android/workspase_AS/PictureProcess/app/build/intermediates/ndkBuild/release/obj/local/armeabi-v7a/libstdc++.a -lgcc -gcc-toolchain F:/android/sdk1/ndk-bundle/build//../toolchains/arm-linux-androideabi-4.9/prebuilt/windows-x86_64 -no-canonical-prefixes -target armv7-none-linux-androideabi -Wl,--fix-cortex-a8 -Wl,--build-id -Wl,--no-undefined -Wl,-z,noexecstack -Wl,-z,relro -Wl,-z,now -Wl,--warn-shared-textrel -Wl,--fatal-warnings -LF:/android/sdk1/ndk-bundle/build//../platforms/android-14/arch-arm/usr/lib -llog -lstdc++ -lc -lm -o F:/android/workspase_AS/PictureProcess/app/build/intermediates/ndkBuild/release/obj/local/armeabi-v7a/libPictureProcess.so md "F:\android\workspase_AS\PictureProcess\app\build\intermediates\ndkBuild\release\lib\armeabi-v7a" >NUL 2>NUL || rem F:/android/sdk1/ndk-bundle/build//../prebuilt/windows-x86_64/bin/echo.exe [armeabi-v7a] "Install ": "libPictureProcess.so => F:\android\workspase_AS\PictureProcess\app\build\intermediates\ndkBuild\release\lib/armeabi-v7a/libPictureProcess.so" copy /b/y "F:\android\workspase_AS\PictureProcess\app\build\intermediates\ndkBuild\release\obj\local\armeabi-v7a\libPictureProcess.so" "F:\android\workspase_AS\PictureProcess\app\build\intermediates\ndkBuild\release\lib\armeabi-v7a\libPictureProcess.so" > NUL F:/android/sdk1/ndk-bundle/build//../toolchains/arm-linux-androideabi-4.9/prebuilt/windows-x86_64/bin/arm-linux-androideabi-strip --strip-unneeded F:\android\workspase_AS\PictureProcess\app\build\intermediates\ndkBuild\release\lib/armeabi-v7a/libPictureProcess.so process_begin: CreateProcess(NULL, "", ...) failed.

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