Add library module

app/build.gradle

@@ -12,12 +12,6 @@ android {
         versionName "1.0"
 
         testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
-
-        externalNativeBuild {
-            cmake {
-                cppFlags ""
-            }
-        }
     }
 
     buildTypes {
@@ -26,13 +20,6 @@ android {
             proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
         }
     }
-
-    externalNativeBuild {
-        cmake {
-            path "src/main/cpp/CMakeLists.txt"
-            version "3.10.2"
-        }
-    }
 }
 
 dependencies {
@@ -43,4 +30,7 @@ dependencies {
     testImplementation 'junit:junit:4.12'
     androidTestImplementation 'androidx.test.ext:junit:1.1.1'
     androidTestImplementation 'androidx.test.espresso:espresso-core:3.2.0'
+
+    implementation project(path: ':library')
+
 }

app/src/androidTest/java/com/github/xch168/ffmpeg/invoker/demo/ExampleInstrumentedTest.java

@@ -1,4 +1,4 @@
-package com.github.xch168.ffmpeg.invoker;
+package com.github.xch168.ffmpeg.invoker.demo;
 
 import android.content.Context;
 

app/src/main/AndroidManifest.xml

@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
-    package="com.github.xch168.ffmpeg.invoker">
+    package="com.github.xch168.ffmpeg.invoker.demo">
 
     <application
         android:allowBackup="true"

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

@@ -1,10 +0,0 @@
-#include <jni.h>
-#include <string>
-
-extern "C" JNIEXPORT jstring JNICALL
-Java_com_github_xch168_ffmpeg_invoker_MainActivity_stringFromJNI(
-        JNIEnv* env,
-        jobject /* this */) {
-    std::string hello = "Hello from C++";
-    return env->NewStringUTF(hello.c_str());
-}

app/src/main/java/com/github/xch168/ffmpeg/invoker/demo/MainActivity.java

@@ -1,16 +1,14 @@
-package com.github.xch168.ffmpeg.invoker;
-
-import androidx.appcompat.app.AppCompatActivity;
+package com.github.xch168.ffmpeg.invoker.demo;
 
 import android.os.Bundle;
 import android.widget.TextView;
 
+import androidx.appcompat.app.AppCompatActivity;
+
+import com.github.xch168.ffmpeg.invoker.FFmpegInvoker;
+
 public class MainActivity extends AppCompatActivity {
 
-    // Used to load the 'native-lib' library on application startup.
-    static {
-        System.loadLibrary("native-lib");
-    }
 
     @Override
     protected void onCreate(Bundle savedInstanceState) {
@@ -19,12 +17,7 @@ public class MainActivity extends AppCompatActivity {
 
         // Example of a call to a native method
         TextView tv = findViewById(R.id.sample_text);
-        tv.setText(stringFromJNI());
+        tv.setText(FFmpegInvoker.stringFromJNI());
     }
 
-    /**
-     * A native method that is implemented by the 'native-lib' native library,
-     * which is packaged with this application.
-     */
-    public native String stringFromJNI();
 }

app/src/main/res/layout/activity_main.xml

@@ -4,7 +4,7 @@
     xmlns:tools="http://schemas.android.com/tools"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
-    tools:context=".MainActivity">
+    tools:context="com.github.xch168.ffmpeg.invoker.demo.MainActivity">
 
     <TextView
         android:id="@+id/sample_text"

app/src/test/java/com/github/xch168/ffmpeg/invoker/demo/ExampleUnitTest.java

@@ -0,0 +1,17 @@
+package com.github.xch168.ffmpeg.invoker.demo;
+
+import org.junit.Test;
+
+import static org.junit.Assert.*;
+
+/**
+ * Example local unit test, which will execute on the development machine (host).
+ *
+ * @see <a href="http://d.android.com/tools/testing">Testing documentation</a>
+ */
+public class ExampleUnitTest {
+    @Test
+    public void addition_isCorrect() {
+        assertEquals(4, 2 + 2);
+    }
+}

library/.gitignore

@@ -0,0 +1 @@
+/build

library/build.gradle

@@ -0,0 +1,50 @@
+apply plugin: 'com.android.library'
+
+android {
+    compileSdkVersion 29
+    buildToolsVersion "29.0.3"
+
+    defaultConfig {
+        minSdkVersion 16
+        targetSdkVersion 29
+        versionCode 1
+        versionName "1.0"
+
+        testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
+        consumerProguardFiles 'consumer-rules.pro'
+
+        externalNativeBuild {
+            cmake {
+                cppFlags ""
+                abiFilters "armeabi-v7a", "arm64-v8a", "x86"
+            }
+        }
+    }
+
+    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"
+        }
+    }
+
+    sourceSets.main {
+        jniLibs.srcDir 'libs'
+    }
+}
+
+dependencies {
+    implementation fileTree(dir: 'libs', include: ['*.jar'])
+
+    implementation 'androidx.appcompat:appcompat:1.1.0'
+    testImplementation 'junit:junit:4.12'
+    androidTestImplementation 'androidx.test.ext:junit:1.1.1'
+    androidTestImplementation 'androidx.test.espresso:espresso-core:3.2.0'
+}

library/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

library/src/androidTest/java/com/github/xch168/ffmpeg/invoker/ExampleInstrumentedTest.java

@@ -0,0 +1,27 @@
+package com.github.xch168.ffmpeg.invoker;
+
+import android.content.Context;
+
+import androidx.test.platform.app.InstrumentationRegistry;
+import androidx.test.ext.junit.runners.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 <a href="http://d.android.com/tools/testing">Testing documentation</a>
+ */
+@RunWith(AndroidJUnit4.class)
+public class ExampleInstrumentedTest {
+    @Test
+    public void useAppContext() {
+        // Context of the app under test.
+        Context appContext = InstrumentationRegistry.getInstrumentation().getTargetContext();
+
+        assertEquals("com.github.xch168.ffmpeg.invoker.test", appContext.getPackageName());
+    }
+}

library/src/main/AndroidManifest.xml

@@ -0,0 +1,2 @@
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    package="com.github.xch168.ffmpeg.invoker" />

library/src/main/cpp/CMakeLists.txt

@@ -11,13 +11,13 @@ cmake_minimum_required(VERSION 3.4.1)
 # Gradle automatically packages shared libraries with your APK.
 
 add_library( # Sets the name of the library.
-             native-lib
+             ffmpeg-invoker
 
              # Sets the library as a shared library.
              SHARED
 
              # Provides a relative path to your source file(s).
-             native-lib.cpp )
+        ffmpeg-invoker.cpp)
 
 # Searches for a specified prebuilt library and stores the path as a
 # variable. Because CMake includes system libraries in the search path by
@@ -37,7 +37,7 @@ find_library( # Sets the name of the path variable.
 # build script, prebuilt third-party libraries, or system libraries.
 
 target_link_libraries( # Specifies the target library.
-                       native-lib
+                       ffmpeg-invoker
 
                        # Links the target library to the log library
                        # included in the NDK.

library/src/main/cpp/ffmpeg-invoker.cpp

@@ -0,0 +1,9 @@
+#include <jni.h>
+#include <string>
+
+extern "C"
+JNIEXPORT jstring JNICALL
+Java_com_github_xch168_ffmpeg_invoker_FFmpegInvoker_stringFromJNI(JNIEnv *env, jclass clazz) {
+    std::string hello = "Hello from C++";
+    return env->NewStringUTF(hello.c_str());
+}

library/src/main/java/com/github/xch168/ffmpeg/invoker/FFmpegInvoker.java

@@ -0,0 +1,24 @@
+package com.github.xch168.ffmpeg.invoker;
+
+/**
+ * Created by XuCanHui on 2020/3/14.
+ */
+public class FFmpegInvoker {
+
+    static {
+        System.loadLibrary("ffmpeg-invoker");
+    }
+
+    public static native String stringFromJNI();
+
+    public static void exec(Callback callback)
+    {
+
+    }
+
+    public interface Callback {
+        void onSuccess();
+        void onFailure();
+        void onProgress();
+    }
+}

settings.gradle

@@ -1,2 +1,3 @@
 rootProject.name='FFmpeg-Invoker'
 include ':app'
+include ':library'