AudioEffect - Fixed a typo; Kotlin风格代码优化

AndroidMedia/src/main/java/com/frank/androidmedia/controller/AudioEffectController.kt

@@ -91,7 +91,7 @@ open class AudioEffectController(audioEffectCallback: AudioEffectCallback) {
             override fun onItemSelected(arg0: AdapterView<*>, arg1: View, arg2: Int, arg3: Long) {
                 try {
                     mEqualizer!!.usePreset(arg2.toShort())
-                    val seekBarList: List<SeekBar>? = mAudioEffectCallback?.getSeeBarList()
+                    val seekBarList: List<SeekBar>? = mAudioEffectCallback?.getSeekBarList()
                     if (mBands > 0 && seekBarList != null && mEqualizer != null) {
                         for (band in 0 until mBands) {
                             seekBarList[band].progress = mEqualizer!!.getBandLevel(band.toShort()) - minEQLevel

AndroidMedia/src/main/java/com/frank/androidmedia/listener/AudioEffectCallback.kt

@@ -12,7 +12,7 @@ import java.util.ArrayList
  */
 interface AudioEffectCallback {
 
-    fun getSeeBarList(): List<SeekBar>?
+    fun getSeekBarList(): List<SeekBar>?
 
     fun setEqualizerList(maxProgress: Int, equalizerList: ArrayList<Pair<*, *>>)
 

app/src/main/java/com/frank/ffmpeg/activity/AudioEffectActivity.kt

@@ -15,7 +15,7 @@ import com.frank.androidmedia.controller.AudioEffectController
 import com.frank.androidmedia.listener.AudioEffectCallback
 import com.frank.ffmpeg.R
 import com.frank.ffmpeg.adapter.EqualizerAdapter
-import com.frank.ffmpeg.listener.OnSeeBarListener
+import com.frank.ffmpeg.listener.OnSeekBarListener
 import com.frank.ffmpeg.util.FileUtil
 import com.frank.ffmpeg.view.VisualizerView
 import java.io.IOException
@@ -25,11 +25,11 @@ import java.util.ArrayList
  * Audio effect: equalizer, enhancer, visualizer, bassBoost
  * Created by frank on 2020/10/20.
  */
-class AudioEffectActivity : BaseActivity(), OnSeeBarListener, AudioEffectCallback {
+class AudioEffectActivity : BaseActivity(), OnSeekBarListener, AudioEffectCallback {
 
     companion object {
 
-        private val audioPath = Environment.getExternalStorageDirectory().path + "/tiger.mp3"
+        private var audioPath = Environment.getExternalStorageDirectory().path + "/tiger.mp3"
     }
 
     private var mPlayer: MediaPlayer? = null
@@ -48,12 +48,13 @@ class AudioEffectActivity : BaseActivity(), OnSeeBarListener, AudioEffectCallbac
             Manifest.permission.MODIFY_AUDIO_SETTINGS)
 
     private val onPreparedListener = MediaPlayer.OnPreparedListener {
-        mAudioEffectController = AudioEffectController(this)
-        mAudioEffectController?.setupEqualizer(mPlayer!!.audioSessionId)
-        mAudioEffectController?.setupPresetStyle(this@AudioEffectActivity, spinnerStyle!!)
-        mAudioEffectController?.setupBassBoost(mPlayer!!.audioSessionId, barBassBoost!!)
-        mAudioEffectController?.setLoudnessEnhancer(mPlayer!!.audioSessionId, barEnhancer!!)
-        mAudioEffectController?.setupVisualizer(mPlayer!!.audioSessionId)
+        mAudioEffectController = AudioEffectController(this).apply {
+            setupEqualizer(mPlayer!!.audioSessionId)
+            setupPresetStyle(this@AudioEffectActivity, spinnerStyle!!)
+            setupBassBoost(mPlayer!!.audioSessionId, barBassBoost!!)
+            setLoudnessEnhancer(mPlayer!!.audioSessionId, barEnhancer!!)
+            setupVisualizer(mPlayer!!.audioSessionId)
+        }
 
         mPlayer!!.start()
     }
@@ -95,10 +96,11 @@ class AudioEffectActivity : BaseActivity(), OnSeeBarListener, AudioEffectCallbac
             return
         }
         try {
-            mPlayer = MediaPlayer()
-            mPlayer!!.setDataSource(audioPath)
-            mPlayer!!.setOnPreparedListener(onPreparedListener)
-            mPlayer!!.prepareAsync()
+            mPlayer = MediaPlayer().apply {
+                setDataSource(audioPath)
+                setOnPreparedListener(onPreparedListener)
+                prepareAsync()
+            }
         } catch (e: IOException) {
             Log.e("AudioEffect", "play error=$e")
         }
@@ -113,17 +115,18 @@ class AudioEffectActivity : BaseActivity(), OnSeeBarListener, AudioEffectCallbac
     }
 
     override fun onSelectedFile(filePath: String) {
-
+        audioPath = filePath
+        initPlayer()
     }
 
     override fun setEqualizerList(maxProgress: Int, equalizerList: ArrayList<Pair<*, *>>) {
-        if (equalizerAdapter != null) {
-            equalizerAdapter!!.setMaxProgress(maxProgress)
-            equalizerAdapter!!.setEqualizerList(equalizerList)
+        equalizerAdapter?.let {
+            it.setMaxProgress(maxProgress)
+            it.setEqualizerList(equalizerList)
         }
     }
 
-    override fun getSeeBarList(): List<SeekBar>? {
+    override fun getSeekBarList(): List<SeekBar>? {
         return equalizerAdapter?.getSeekBarList()
     }
 

app/src/main/java/com/frank/ffmpeg/activity/EqualizerActivity.kt

@@ -12,12 +12,12 @@ import androidx.recyclerview.widget.RecyclerView
 import com.frank.ffmpeg.AudioPlayer
 import com.frank.ffmpeg.R
 import com.frank.ffmpeg.adapter.EqualizerAdapter
-import com.frank.ffmpeg.listener.OnSeeBarListener
+import com.frank.ffmpeg.listener.OnSeekBarListener
 import com.frank.ffmpeg.view.VisualizerView
 import java.lang.StringBuilder
 import java.util.ArrayList
 
-class EqualizerActivity : BaseActivity(), OnSeeBarListener {
+class EqualizerActivity : BaseActivity(), OnSeekBarListener {
 
     // unit: Hz  gain:0-20
     /*- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

app/src/main/java/com/frank/ffmpeg/adapter/EqualizerAdapter.kt

@@ -10,7 +10,7 @@ import android.widget.TextView
 import androidx.recyclerview.widget.RecyclerView
 
 import com.frank.ffmpeg.R
-import com.frank.ffmpeg.listener.OnSeeBarListener
+import com.frank.ffmpeg.listener.OnSeekBarListener
 
 import java.util.ArrayList
 
@@ -20,7 +20,7 @@ import java.util.ArrayList
  * @desc Adapter of equalizer
  */
 
-class EqualizerAdapter(private val context: Context, private val onSeeBarListener: OnSeeBarListener?) : RecyclerView.Adapter<RecyclerView.ViewHolder>() {
+class EqualizerAdapter(private val context: Context, private val onSeekBarListener: OnSeekBarListener?) : RecyclerView.Adapter<RecyclerView.ViewHolder>() {
 
     private var equalizerList: List<Pair<*, *>>? = ArrayList()
     private val seekBarList = ArrayList<SeekBar>()
@@ -51,7 +51,7 @@ class EqualizerAdapter(private val context: Context, private val onSeeBarListene
             }
 
             override fun onStopTrackingTouch(seekBar: SeekBar) {
-                onSeeBarListener?.onProgress(i, seekBar.progress)
+                onSeekBarListener?.onProgress(i, seekBar.progress)
             }
         })
     }

app/src/main/java/com/frank/ffmpeg/listener/OnSeekBarListener.kt

@@ -1,5 +1,5 @@
 package com.frank.ffmpeg.listener
 
-interface OnSeeBarListener {
+interface OnSeekBarListener {
     fun onProgress(index: Int, progress: Int)
 }