准备工作：

1.编译好的ffmpeg动态库.so文件，以及ffmpeg的头文件；

2.android studio开发环境，包括NDK等可用环境；

步骤一：

新建一个android studio工程，命名netplayer，勾选“Include C++ support”；其他选择默认，直到完成；

步骤二：

将ffmpeg的动态库和include头文件，拷贝到netplayer工程的libs目录下：

android studio会自动更新工程列表，后续主要修改以下几个文件：

//C++接口的实现，内部封装ffmpeg功能

E:\MyAndroidWorkSpace\netplayer\app\src\main\cpp\native-lib.cpp

//java界面，调用C++接口

E:\MyAndroidWorkSpace\netplayer\app\src\main\java\player\cn\com\netplayer\MainActivity.java

//编译参数，指定库

E:\MyAndroidWorkSpace\netplayer\app\CMakeLists.txt

//jni相关

E:\MyAndroidWorkSpace\netplayer\app\build.gradle

步骤三(CMakeList.txt)

cmake_minimum_required(VERSION 3.4.1)

find_library( log-lib

log )

set(distribution_DIR ../../../../libs)

add_library( native-lib

SHARED

src/main/cpp/native-lib.cpp )

add_library( avcodec-57

SHARED

IMPORTED)

set_target_properties( avcodec-57

PROPERTIES IMPORTED_LOCATION

${distribution_DIR}/armeabi/libavcodec-57.so)

add_library( avfilter-6

SHARED

IMPORTED)

set_target_properties( avfilter-6

PROPERTIES IMPORTED_LOCATION

${distribution_DIR}/armeabi/libavfilter-6.so)

add_library( avformat-57

SHARED

IMPORTED)

set_target_properties( avformat-57

PROPERTIES IMPORTED_LOCATION

${distribution_DIR}/armeabi/libavformat-57.so)

add_library( avutil-55

SHARED

IMPORTED)

set_target_properties( avutil-55

PROPERTIES IMPORTED_LOCATION

${distribution_DIR}/armeabi/libavutil-55.so)

add_library( swresample-2

SHARED

IMPORTED)

set_target_properties( swresample-2

PROPERTIES IMPORTED_LOCATION

${distribution_DIR}/armeabi/libswresample-2.so)

add_library( swscale-4

SHARED

IMPORTED)

set_target_properties( swscale-4

PROPERTIES IMPORTED_LOCATION

${distribution_DIR}/armeabi/libswscale-4.so)

include_directories(libs/include)

target_link_libraries( native-lib

avcodec-57

avfilter-6

avformat-57

avutil-55

swresample-2

swscale-4

${log-lib} )

步骤四(build.gradle)：

在系统生成的原来基础上，加入：

defaultConfig下加入：

sourceSets{

main{

jniLibs.srcDirs = ['libs']

}

}

externalNativeBuild下加入：

ndk{

abiFilters "armeabi"}

完整内容：

apply plugin: 'com.android.application'

android {

compileSdkVersion 25

buildToolsVersion "26.0.0"

defaultConfig {

applicationId "player.cn.com.netplayer"

minSdkVersion 15

targetSdkVersion 25

versionCode 1

versionName "1.0"

testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"

sourceSets {

main {

jniLibs.srcDirs = ['libs']

}

}

externalNativeBuild {

cmake {

cppFlags ""

}

ndk{

abiFilters "armeabi"

}

}

}

buildTypes {

release {

minifyEnabled false

proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'

}

}

externalNativeBuild {

cmake {

path "CMakeLists.txt"

}

}

}

dependencies {

compile fileTree(dir: 'libs', include: ['*.jar'])

androidTestCompile('com.android.support.test.espresso:espresso-core:2.2.2', {

exclude group: 'com.android.support', module: 'support-annotations'

})

compile 'com.android.support:appcompat-v7:25.3.1'

compile 'com.android.support.constraint:constraint-layout:1.0.2'

testCompile 'junit:junit:4.12'

}

经过以上4个步骤，已经可以build成功了。

步骤5(native-lib.cpp)

#include #include #include extern "C" {

//编码

#include "libavcodec/avcodec.h"

//封装格式处理

#include "libavformat/avformat.h"

//像素处理

#include "libswscale/swscale.h"

}

#define FFLOGI(FORMAT,...) __android_log_print(ANDROID_LOG_INFO,"ffmpeg",FORMAT,##__VA_ARGS__);

#define FFLOGE(FORMAT,...) __android_log_print(ANDROID_LOG_ERROR,"ffmpeg",FORMAT,##__VA_ARGS__);

extern "C"

JNIEXPORT jstring JNICALL

Java_player_cn_com_netplayer_MainActivity_stringFromJNI(

JNIEnv *env,

jobject /* this */) {

std::string hello = "Hello from C++";

return env->NewStringUTF(hello.c_str());

}

extern "C"

JNIEXPORT jstring JNICALL

Java_player_cn_com_netplayer_MainActivity_InitFFMPEG(

JNIEnv* env,

jobject /* this */) {

//1.注册所有组件

av_register_all();

std::string hello = "av_register_all OK";

return env->NewStringUTF(hello.c_str());

}

步骤六(MainActivity.java)：

package player.cn.com.netplayer;

import android.support.v7.app.AppCompatActivity;

import android.os.Bundle;

import android.widget.TextView;

public class MainActivity extends AppCompatActivity {

// Used to load the 'native-lib' library on application startup.

static {

System.loadLibrary("native-lib");

System.loadLibrary("avcodec-57");

System.loadLibrary("avfilter-6");

System.loadLibrary("avformat-57");

System.loadLibrary("avutil-55");

System.loadLibrary("swresample-2");

System.loadLibrary("swscale-4");

}

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

// Example of a call to a native method

TextView tv = (TextView) findViewById(R.id.sample_text);

tv.setText(stringFromJNI());

tv.setText(InitFFMPEG());

}

/**

* A native method that is implemented by the 'native-lib' native library,

* which is packaged with this application.

*/

public native String stringFromJNI();

//初始化ffmpeg库

public native String InitFFMPEG();

}

演示结果：

Demo程序下载地址：https://github.com/zhuxian2009/netplayer