finish project

Author: stefanJi

.gitignore

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+*.iml
+.gradle
+/local.properties
+/.idea
+.DS_Store
+/build
+/captures
+.externalNativeBuild
+.cxx
+local.properties

build.gradle

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+// Top-level build file where you can add configuration options common to all sub-projects/modules.
+buildscript {
+    ext.kotlin_version = "1.3.72"
+    repositories {
+        google()
+        jcenter()
+    }
+    dependencies {
+        classpath "com.android.tools.build:gradle:4.1.2"
+        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
+
+        // NOTE: Do not place your application dependencies here; they belong
+        // in the individual module build.gradle files
+    }
+}
+
+allprojects {
+    repositories {
+        google()
+        jcenter()
+        maven { url "https://www.jitpack.io" }
+    }
+}
+
+task clean(type: Delete) {
+    delete rootProject.buildDir
+}

demo/.gitignore

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

demo/build.gradle

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+plugins {
+    id 'com.android.application'
+    id 'kotlin-android'
+}
+
+android {
+    compileSdkVersion 30
+    buildToolsVersion "30.0.3"
+
+    defaultConfig {
+        applicationId "x.y.audiovisulizer"
+        minSdkVersion 21
+        targetSdkVersion 30
+        versionCode 1
+        versionName "1.0"
+
+        testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
+    }
+
+    buildTypes {
+        release {
+            minifyEnabled false
+            proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
+        }
+    }
+    compileOptions {
+        sourceCompatibility JavaVersion.VERSION_1_8
+        targetCompatibility JavaVersion.VERSION_1_8
+    }
+    kotlinOptions {
+        jvmTarget = '1.8'
+    }
+}
+
+dependencies {
+
+    def lifecycle_version = "2.3.0"
+    implementation "androidx.lifecycle:lifecycle-runtime-ktx:$lifecycle_version"
+
+    implementation "org.jetbrains.kotlin:kotlin-stdlib:$kotlin_version"
+    implementation 'androidx.core:core-ktx:1.3.2'
+    implementation 'androidx.appcompat:appcompat:1.2.0'
+    implementation 'com.google.android.material:material:1.3.0'
+    implementation 'org.jetbrains.kotlinx:kotlinx-coroutines-android:1.4.2'
+    implementation 'androidx.constraintlayout:constraintlayout:2.0.4'
+
+    implementation project(":library")
+}

demo/proguard-rules.pro

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+# 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

demo/src/androidTest/java/x/stefanji/audiovisulizer/ExampleInstrumentedTest.kt

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+package x.stefanji.audiovisulizer
+
+import androidx.test.platform.app.InstrumentationRegistry
+import androidx.test.ext.junit.runners.AndroidJUnit4
+
+import org.junit.Test
+import org.junit.runner.RunWith
+
+import org.junit.Assert.*
+
+/**
+ * Instrumented test, which will execute on an Android device.
+ *
+ * See [testing documentation](http://d.android.com/tools/testing).
+ */
+@RunWith(AndroidJUnit4::class)
+class ExampleInstrumentedTest {
+    @Test
+    fun useAppContext() {
+        // Context of the app under test.
+        val appContext = InstrumentationRegistry.getInstrumentation().targetContext
+        assertEquals("x.y.audiovisulizer", appContext.packageName)
+    }
+}

demo/src/main/AndroidManifest.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    package="x.stefanji.audiovisulizer">
+
+    <application
+        android:allowBackup="true"
+        android:icon="@mipmap/ic_launcher"
+        android:label="@string/app_name"
+        android:roundIcon="@mipmap/ic_launcher_round"
+        android:supportsRtl="true"
+        android:theme="@style/Theme.AudioVisulizer">
+        <activity
+            android:name="x.stefanji.audiovisulizer.MainActivity"
+            android:label="@string/app_name"
+            android:theme="@style/Theme.AudioVisulizer.NoActionBar">
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />
+
+                <category android:name="android.intent.category.LAUNCHER" />
+            </intent-filter>
+        </activity>
+    </application>
+
+</manifest>

demo/src/main/assets/output.mp3

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+package x.stefanji.audiovisulizer
+
+import android.os.Bundle
+import android.util.Log
+import android.widget.Button
+import androidx.appcompat.app.AppCompatActivity
+import androidx.lifecycle.lifecycleScope
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.launch
+import kotlinx.coroutines.withContext
+import x.stefanji.library.AudioWaveformGenerator
+import java.io.File
+
+private const val TAG = "Main"
+private const val MP3 = "output.mp3"
+private const val M4a = "test.m4a"
+private const val INPUT_FILE = M4a
+
+class MainActivity : AppCompatActivity() {
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        setContentView(R.layout.activity_main)
+
+        findViewById<Button>(R.id.btnStart).setOnClickListener {
+            lifecycleScope.launch {
+                withContext(Dispatchers.IO) {
+                    try {
+                        val file = File(cacheDir, INPUT_FILE)
+                        val ins = assets.open(INPUT_FILE)
+                        val ous = file.outputStream()
+                        val buffer = ByteArray(4096)
+                        var len: Int
+                        while (ins.read(buffer).also { read -> len = read } != -1) {
+                            ous.write(buffer, 0, len)
+                        }
+                        ins.close()
+                        ous.close()
+
+                        val decoder = AudioWaveformGenerator(
+                            file.absolutePath,
+                            100
+                        )
+                        decoder.startDecode()
+                        val samples = decoder.getSampleData()
+                        Log.d(TAG, "onFinish ${samples.size}")
+                        lifecycleScope.launch {
+                            val values = samples.toList()
+                            withContext(Dispatchers.Main) {
+                                findViewById<Wave>(R.id.wave).setValues(values)
+                            }
+                        }
+                    } catch (e: Exception) {
+                        Log.e(TAG, "copy", e)
+                    }
+                }
+            }
+        }
+    }
+}