1.新建c++项目
2.配置NDK路径 这里建议配置NDK版本为:android-ndk-r15c
3.在SNKtool下安装CMake
4.新建Module 并且添加Module (这个module主要用来加载库与写jni) new ->Module FIle ->ProjectStructure
5.在新建的module中写Demo 也就是jni的java通信类
package com.example.myplayer;
public class Demo {
static {
System.loadLibrary("native-lib");
System.loadLibrary("avutil");
System.loadLibrary("swresample");
System.loadLibrary("avcodec");
System.loadLibrary("avformat");
System.loadLibrary("swscale");
System.loadLibrary("postproc");
System.loadLibrary("avfilter");
System.loadLibrary("avdevice");
}
public native String stringFromJNI();
public native String showDetial();
}
6.新建的module中 cpp文件夹下 将FFmpeg的头文件添加进去
7.新建的module中 在main路劲下新建jniLibs目录用来存放FFmpeg .so文件库
这里如果没有苦可以参考这篇https://blog.csdn.net/we1less/article/details/109039079
8.新建的module中 编写build.gradle文件
在 android { defaultConfig { 下添加
externalNativeBuild {
cmake {
cppFlags "-frtti -fexceptions"
abiFilters "x86"
}
}
在 android { 下添加
externalNativeBuild {
cmake {
path "CMakeLists.txt"
version "3.10.2"
}
}
sourceSets {
main {
jniLibs.srcDirs = ['src/main/jniLibs']
}
}
9.新建的module中 编写CMakeLists.txt
cmake_minimum_required(VERSION 3.4.1)
include_directories(src/main/cpp/include)
add_library(
native-lib
SHARED
${CMAKE_SOURCE_DIR}/src/main/cpp/native-lib.cpp)
add_library( avcodec
SHARED
IMPORTED)
set_target_properties( avcodec
PROPERTIES IMPORTED_LOCATION
${CMAKE_SOURCE_DIR}/src/main/jniLibs/${ANDROID_ABI}/libavcodec.so)
add_library( avdevice
SHARED
IMPORTED)
set_target_properties( avdevice
PROPERTIES IMPORTED_LOCATION
${CMAKE_SOURCE_DIR}/src/main/jniLibs/${ANDROID_ABI}/libavdevice.so)
add_library( avfilter
SHARED
IMPORTED)
set_target_properties( avfilter
PROPERTIES IMPORTED_LOCATION
${CMAKE_SOURCE_DIR}/src/main/jniLibs/${ANDROID_ABI}/libavfilter.so)
add_library( avformat
SHARED
IMPORTED)
set_target_properties( avformat
PROPERTIES IMPORTED_LOCATION
${CMAKE_SOURCE_DIR}/src/main/jniLibs/${ANDROID_ABI}/libavformat.so)
add_library( avutil
SHARED
IMPORTED)
set_target_properties( avutil
PROPERTIES IMPORTED_LOCATION
${CMAKE_SOURCE_DIR}/src/main/jniLibs/${ANDROID_ABI}/libavutil.so)
add_library( swresample
SHARED
IMPORTED)
set_target_properties( swresample
PROPERTIES IMPORTED_LOCATION
${CMAKE_SOURCE_DIR}/src/main/jniLibs/${ANDROID_ABI}/libswresample.so)
add_library( swscale
SHARED
IMPORTED)
set_target_properties( swscale
PROPERTIES IMPORTED_LOCATION
${CMAKE_SOURCE_DIR}/src/main/jniLibs/${ANDROID_ABI}/libswscale.so)
add_library( postproc
SHARED
IMPORTED)
set_target_properties( postproc
PROPERTIES IMPORTED_LOCATION
${CMAKE_SOURCE_DIR}/src/main/jniLibs/${ANDROID_ABI}/libpostproc.so)
target_link_libraries(
native-lib
avcodec
avdevice
avfilter
avformat
avutil
swresample
swscale
postproc
log )
10.编写cpp文件
#include <jni.h>
#include <string>
#include <android/log.h>
extern "C"{
#include <libavcodec/avcodec.h>
#include <libavformat/avformat.h>
}
#define LOG_TAG "godv"
#define LOGD(...) __android_log_print(ANDROID_LOG_DEBUG, LOG_TAG, __VA_ARGS__)
extern "C"
JNIEXPORT jstring JNICALL
Java_com_example_myplayer_Demo_stringFromJNI(JNIEnv *env, jobject thiz) {
std::string hello = "Hello godv";
return env->NewStringUTF(hello.c_str());
}
extern "C"
JNIEXPORT jstring JNICALL
Java_com_example_myplayer_Demo_showDetial(JNIEnv *env, jobject thiz) {
av_register_all();
AVCodec *c_temp = av_codec_next(NULL);
while (c_temp != NULL)
{
switch (c_temp->type)
{
case AVMEDIA_TYPE_VIDEO:
LOGD("[Video]:%s", c_temp->name);
break;
case AVMEDIA_TYPE_AUDIO:
LOGD("[Audio]:%s", c_temp->name);
break;
default:
LOGD("[Other]:%s", c_temp->name);
break;
}
c_temp = c_temp->next;
}
std::string hello = "Hello godv";
return env->NewStringUTF(hello.c_str());
}
11.在mainactivity中调用
package com.example.godvmusic;
import androidx.appcompat.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.TextView;
import com.example.myplayer.Demo;
public class MainActivity extends AppCompatActivity {
private Demo mDemo;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mDemo = new Demo();
}
public void run(View view){
mDemo.showDetial();
}
}
12.最后附上整个项目的结构图
来源:oschina
链接:https://my.oschina.net/u/4295105/blog/4677372