1. Local compilation
Set the environment variable, ndk to use version r10e
ANDROID_SDK
ANDROID_NDK
System Preferences - > Security and privacy - > General - > app s that can be downloaded from the following location are set to any source
Setting method: after the Terminal terminal is opened, enter at the command prompt
sudo spctl --master-disable
Then follow the official prompts
2. Local commissioning
The ijkplayer-armv7a project is associated with Android MK compile script
Modify the file: ijkplayer / ijkplayer-armv7a / build gradle
Modification: do not specify the location of jni's lib Library folder
android {
//Delete the following
//sourceSets.main {
// jniLibs.srcDirs 'src/main/libs'
// jni.srcDirs = [] // This prevents the auto generation of Android.mk
//}
}
Modified content: add native code editor translation script Android File path of MK
android {
//Add the following
externalNativeBuild {
ndkBuild {
path "src/main/jni/Android.mk"
}
}
}
Modified content: set the parameters of the compiled script
android {
defaultConfig {
//Add the following
externalNativeBuild {
ndkBuild {
arguments "NDK_APPLICATION:=src/main/jni/Application.mk"
abiFilters "armeabi-v7a"
}
}
}
}
Modification: open the debug mode of the project
android {
buildTypes {
//Add the following
debug {
debuggable true
jniDebuggable true
ndk {
debuggable true
}
}
}
}
Modify the compilation script of ffmpeg
Modified file: ijkplayer / ijkplayer-armv7a / SRC / main / JNI / ffmpeg / Android mk
Modification: change the link mode of ffmpeg from dynamic library mode to static library mode
LOCAL_PATH := $(call my-dir) #Delete ffmpeg dynamic library #include $(CLEAR_VARS) #LOCAL_MODULE := ijkffmpeg #LOCAL_SRC_FILES := #$(MY_APP_FFMPEG_OUTPUT_PATH)/libijkffmpeg.so #Include $(PREBUILT_SHARED_LIBRARY) #Add ffmpeg static library as follows include $(CLEAR_VARS) LOCAL_MODULE := avcodec LOCAL_SRC_FILES := $(MY_APP_FFMPEG_OUTPUT_PATH)/lib/libavcodec.a LOCAL_EXPORT_C_INCLUDES := $(MY_APP_FFMPEG_INCLUDE_PATH) LOCAL_C_INCLUDES += $(MY_APP_FFMPEG_INCLUDE_PATH) include $(PREBUILT_STATIC_LIBRARY) include $(CLEAR_VARS) LOCAL_MODULE := avformat LOCAL_SRC_FILES := $(MY_APP_FFMPEG_OUTPUT_PATH)/lib/libavformat.a LOCAL_EXPORT_C_INCLUDES := $(MY_APP_FFMPEG_INCLUDE_PATH) LOCAL_C_INCLUDES += $(MY_APP_FFMPEG_INCLUDE_PATH) include $(PREBUILT_STATIC_LIBRARY) include $(CLEAR_VARS) LOCAL_MODULE := swscale LOCAL_SRC_FILES := $(MY_APP_FFMPEG_OUTPUT_PATH)/lib/libswscale.a LOCAL_EXPORT_C_INCLUDES := $(MY_APP_FFMPEG_OUTPUT_PATH)/include LOCAL_C_INCLUDES += $(MY_APP_FFMPEG_INCLUDE_PATH) include $(PREBUILT_STATIC_LIBRARY) include $(CLEAR_VARS) LOCAL_MODULE := avutil LOCAL_SRC_FILES := $(MY_APP_FFMPEG_OUTPUT_PATH)/lib/libavutil.a LOCAL_EXPORT_C_INCLUDES := $(MY_APP_FFMPEG_INCLUDE_PATH) LOCAL_C_INCLUDES += $(MY_APP_FFMPEG_INCLUDE_PATH) include $(PREBUILT_STATIC_LIBRARY) include $(CLEAR_VARS) LOCAL_MODULE := avfilter LOCAL_SRC_FILES := $(MY_APP_FFMPEG_OUTPUT_PATH)/lib/libavfilter.a LOCAL_EXPORT_C_INCLUDES := $(MY_APP_FFMPEG_INCLUDE_PATH) LOCAL_C_INCLUDES += $(MY_APP_FFMPEG_INCLUDE_PATH) include $(PREBUILT_STATIC_LIBRARY) LOCAL_MODULE := swresample LOCAL_SRC_FILES := $(MY_APP_FFMPEG_OUTPUT_PATH)/lib/libswresample.a LOCAL_EXPORT_C_INCLUDES := $(MY_APP_FFMPEG_INCLUDE_PATH) LOCAL_C_INCLUDES += $(MY_APP_FFMPEG_INCLUDE_PATH) include $(PREBUILT_STATIC_LIBRARY)
Modify the compilation script of ijkplayer
Modified file: ijkplayer / ijkmedia / ijkplayer / Android mk
Modification: add two local libraries -lm-lz
LOCAL_CFLAGS += -std=c99 #LOCAL_LDLIBS += -llog -landroid LOCAL_LDLIBS += -llog -landroid -lm -lz
Modification: change ffmpeg from dynamic link mode to static link mode
#LOCAL_SHARED_LIBRARIES := ijkffmpeg ijksdl #LOCAL_STATIC_LIBRARIES := android-ndk-profiler ijksoundtouch LOCAL_SHARED_LIBRARIES := ijksdl LOCAL_STATIC_LIBRARIES := android-ndk-profiler ijksoundtouch avformat avcodec swscale swresample avfilter avutil
Modify ijksdl compilation script
Modified file: ijkplayer / ijkmedia / ijksdl / Android mk
Modification: change ffmpeg from dynamic link mode to static link mode
#LOCAL_SHARED_LIBRARIES := ijkffmpeg #LOCAL_STATIC_LIBRARIES := cpufeatures yuv_static ijkj4a LOCAL_STATIC_LIBRARIES := cpufeatures yuv_static ijkj4a avformat avcodec swscale swresample avfilter avutil
Shield the loading of ffmpeg dynamic library in java layer
Modify the file: ijkplayer / ijkplayer Java / SRC / main / Java / TV / danmaku / ijk / media / player / ijkmediaplayer java
Modified content: because ffmpeg adopts static library import, there is no need to load the dynamic library of ffmpeg.
public static void loadLibrariesOnce(IjkLibLoader libLoader) {
synchronized (IjkMediaPlayer.class) {
if (!mIsLibLoaded) {
if (libLoader == null)
libLoader = sLocalLibLoader;
//The loading of ijkffmeg library is masked here
//libLoader.loadLibrary("ijkffmpeg");
libLoader.loadLibrary("ijksdl");
libLoader.loadLibrary("ijkplayer");
mIsLibLoaded = true;
}
}
}
example project synchronous modification
Modify the file: ijkplayer / ijkplayer example / build gradle
Modification: specify the cpu type as armv7a and enable the debug mode
android {
//Specify armeabi-v7a
defaultConfig {
externalNativeBuild {
ndkBuild {
abiFilters "armeabi-v7a"
}
}
}
buildTypes {
//Add the specification of debug mode
debug {
jniDebuggable true
}
}
}
Modified content: delete the dependencies of non armeabi-v7a projects
dependencies {
//all32Compile project(':ijkplayer-armv5')
all32Compile project(':ijkplayer-armv7a')
//all32Compile project(':ijkplayer-x86')
//all64Compile project(':ijkplayer-armv5')
all64Compile project(':ijkplayer-armv7a')
//all64Compile project(':ijkplayer-arm64')
//all64Compile project(':ijkplayer-x86')
//all64Compile project(':ijkplayer-x86_64')
}
ndk Library Association
Modify the file: ijkplayer / local properties
Modification: ijkplayer needs to rely on ndk for compilation, so we need to specify the local ndk directory address, and ensure that the ndk version must be between r12 and r14. Never use the ndk in the sdk.
ndk.dir=<Yours ndk route>
Turn off compilation optimization for debugging
Modified file: ijkplayer / ijkplayer-armv7a / SRC / main / JNI / application mk
Modification: c code may be over optimized during compilation, resulting in no variable value during debugging. We can change the optimization level of - O3 to - O0
APP_CFLAGS :=
#Reduce the optimization level of O3 to O0
#-O3 -Wall -pipe \
-O0 -Wall -pipe \
-ffast-math \
-fstrict-aliasing -Werror=strict-aliasing \
-Wno-psabi -Wa,--noexecstack \
-DANDROID -DNDEBUG
Possible errors
If this error is found
All flavors must now belong to a named flavor dimension. Learn more at https://d.android.com/r/tools/flavorDimensions-missing-error-message.html
In ijkplayer / ijkplayer example / build Add in gradle
android {
defaultConfig {
#This value needs to be the same as ijkplayer / build The versionCode in gradle is the same
flavorDimensions "800800"
}
}
The above configuration is completed, but breakpoint debugging is not available yet
Run -> Edit Configurations -> Debugger -> Symbol Directories # Add "ijkplayer-armv7a/" to Symbol Directories
Problems I encountered:
Using a higher version of gradle, c + + code can click trace, but debug can't hang up
With gradle version 4.6, c + + code can't click trace, but it can be debug ged
I tried many times and solved the problem with the 5.4.1-bin version
If there is no lib directory in apk when packaging