change ThreadPootlUtil to kotlin

app/src/main/java/com/frank/ffmpeg/FFmpegCmd.java

@@ -49,7 +49,7 @@ public class FFmpegCmd {
      */
     public static void execute(final String[] commands, final OnHandleListener onHandleListener) {
         mProgressListener = onHandleListener;
-        ThreadPoolUtil.executeSingleThreadPool(new Runnable() {
+        ThreadPoolUtil.INSTANCE.executeSingleThreadPool(new Runnable() {
             @Override
             public void run() {
                 if (onHandleListener != null) {
@@ -76,7 +76,7 @@ public class FFmpegCmd {
      */
     public static void execute(final List<String[]> commands, final OnHandleListener onHandleListener) {
         mProgressListener = onHandleListener;
-        ThreadPoolUtil.executeSingleThreadPool(new Runnable() {
+        ThreadPoolUtil.INSTANCE.executeSingleThreadPool(new Runnable() {
             @Override
             public void run() {
                 if (onHandleListener != null) {
@@ -124,7 +124,7 @@ public class FFmpegCmd {
      * @param onHandleListener onHandleListener
      */
     public static void executeProbe(final String[] commands, final OnHandleListener onHandleListener) {
-        ThreadPoolUtil.executeSingleThreadPool(new Runnable() {
+        ThreadPoolUtil.INSTANCE.executeSingleThreadPool(new Runnable() {
             @Override
             public void run() {
                 if (onHandleListener != null) {

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

@@ -115,7 +115,7 @@ class MediaHandleActivity : BaseActivity() {
         when (viewId) {
             R.id.btn_mux//mux:pure video and pure audio
             -> {
-                ThreadPoolUtil.executeSingleThreadPool { mediaMux(srcFile) }
+                ThreadPoolUtil.executeSingleThreadPool (Runnable { mediaMux(srcFile) })
                 return
             }
             R.id.btn_extract_audio//extract audio
@@ -130,7 +130,7 @@ class MediaHandleActivity : BaseActivity() {
             }
             R.id.btn_dubbing//dubbing
             -> {
-                ThreadPoolUtil.executeSingleThreadPool { mediaDubbing(srcFile) }
+                ThreadPoolUtil.executeSingleThreadPool (Runnable{ mediaDubbing(srcFile) })
                 return
             }
             else -> {

app/src/main/java/com/frank/ffmpeg/util/FFmpegUtil.java

@@ -252,7 +252,7 @@ public class FFmpegUtil {
     public static String[] addWaterMarkImg(String inputPath, String imgPath, int location, int bitRate,
                                            int offsetXY, String outputPath) {
         String mBitRate = bitRate + "k";
-        int offset = ScreenUtil.dp2px(FFmpegApplication.getInstance(), offsetXY);
+        int offset = ScreenUtil.INSTANCE.dp2px(FFmpegApplication.getInstance(), offsetXY);
         String overlay = obtainOverlay(offset, offset, location);
         String waterMarkCmd = "ffmpeg -i %s -i %s -b:v %s -filter_complex %s -preset:v superfast %s";
         waterMarkCmd = String.format(waterMarkCmd, inputPath, imgPath, mBitRate, overlay, outputPath);
@@ -273,7 +273,7 @@ public class FFmpegUtil {
     public static String[] addWaterMarkGif(String inputPath, String imgPath, int location, int bitRate,
                                            int offsetXY, String outputPath) {
         String mBitRate = bitRate + "k";
-        int offset = ScreenUtil.dp2px(FFmpegApplication.getInstance(), offsetXY);
+        int offset = ScreenUtil.INSTANCE.dp2px(FFmpegApplication.getInstance(), offsetXY);
         String overlay = obtainOverlay(offset, offset, location) + ":shortest=1";
         String waterMarkCmd = "ffmpeg -i %s -ignore_loop 0 -i %s -b:v %s -filter_complex %s -preset:v superfast %s";
         waterMarkCmd = String.format(waterMarkCmd, inputPath, imgPath, mBitRate, overlay, outputPath);

app/src/main/java/com/frank/ffmpeg/util/ScreenUtil.java

@@ -1,53 +0,0 @@
-package com.frank.ffmpeg.util;
-
-import android.content.Context;
-import android.util.DisplayMetrics;
-import android.view.WindowManager;
-
-public class ScreenUtil {
-
-    private static DisplayMetrics getDisplayMetrics(Context context) {
-        WindowManager windowManager = (WindowManager) context.getApplicationContext().getSystemService(Context.WINDOW_SERVICE);
-        if (windowManager == null) {
-            return null;
-        }
-        DisplayMetrics displayMetrics = new DisplayMetrics();
-        windowManager.getDefaultDisplay().getMetrics(displayMetrics);
-        return displayMetrics;
-    }
-
-    public static int getScreenWidth(Context context) {
-        if (context == null) {
-            return 0;
-        }
-        DisplayMetrics displayMetrics = getDisplayMetrics(context);
-        return displayMetrics != null ? displayMetrics.widthPixels : 0;
-    }
-
-    public static int getScreenHeight(Context context) {
-        if (context == null) {
-            return 0;
-        }
-        DisplayMetrics displayMetrics = getDisplayMetrics(context);
-        return displayMetrics != null ? displayMetrics.heightPixels : 0;
-    }
-
-    public static int dp2px(Context context, int dpValue) {
-        if (context == null) {
-            return 0;
-        }
-        DisplayMetrics displayMetrics = getDisplayMetrics(context);
-        float density = displayMetrics != null ? displayMetrics.density : 0;
-        return (int) (dpValue * density + 0.5f);
-    }
-
-    public static int px2dp(Context context, int pxValue) {
-        if (context == null) {
-            return 0;
-        }
-        DisplayMetrics displayMetrics = getDisplayMetrics(context);
-        float density = displayMetrics != null ? displayMetrics.density : 0;
-        return (int) (pxValue / density + 0.5f);
-    }
-
-}

app/src/main/java/com/frank/ffmpeg/util/ScreenUtil.kt

@@ -0,0 +1,50 @@
+package com.frank.ffmpeg.util
+
+import android.content.Context
+import android.util.DisplayMetrics
+import android.view.WindowManager
+
+object ScreenUtil {
+
+    private fun getDisplayMetrics(context: Context): DisplayMetrics? {
+        val windowManager = context.applicationContext.getSystemService(Context.WINDOW_SERVICE) as WindowManager
+        val displayMetrics = DisplayMetrics()
+        windowManager.defaultDisplay.getMetrics(displayMetrics)
+        return displayMetrics
+    }
+
+    fun getScreenWidth(context: Context?): Int {
+        if (context == null) {
+            return 0
+        }
+        val displayMetrics = getDisplayMetrics(context)
+        return displayMetrics?.widthPixels ?: 0
+    }
+
+    fun getScreenHeight(context: Context?): Int {
+        if (context == null) {
+            return 0
+        }
+        val displayMetrics = getDisplayMetrics(context)
+        return displayMetrics?.heightPixels ?: 0
+    }
+
+    fun dp2px(context: Context?, dpValue: Int): Int {
+        if (context == null) {
+            return 0
+        }
+        val displayMetrics = getDisplayMetrics(context)
+        val density: Float = displayMetrics?.density ?: 0F
+        return (dpValue * density + 0.5f).toInt()
+    }
+
+    fun px2dp(context: Context?, pxValue: Int): Int {
+        if (context == null) {
+            return 0
+        }
+        val displayMetrics = getDisplayMetrics(context)
+        val density: Float = displayMetrics?.density ?: 0F
+        return (pxValue / density + 0.5f).toInt()
+    }
+
+}

app/src/main/java/com/frank/ffmpeg/util/ThreadPoolUtil.java

@@ -1,14 +0,0 @@
-package com.frank.ffmpeg.util;
-
-import java.util.concurrent.ExecutorService;
-import java.util.concurrent.Executors;
-
-public class ThreadPoolUtil {
-
-    public static ExecutorService executeSingleThreadPool(Runnable runnable) {
-        ExecutorService executor = Executors.newSingleThreadExecutor();
-        executor.submit(runnable);
-        return executor;
-    }
-
-}

app/src/main/java/com/frank/ffmpeg/util/ThreadPoolUtil.kt

@@ -0,0 +1,14 @@
+package com.frank.ffmpeg.util
+
+import java.util.concurrent.ExecutorService
+import java.util.concurrent.Executors
+
+object ThreadPoolUtil {
+
+    fun executeSingleThreadPool(runnable: Runnable): ExecutorService {
+        val executor = Executors.newSingleThreadExecutor()
+        executor.submit(runnable)
+        return executor
+    }
+
+}

app/src/main/java/com/frank/ffmpeg/view/VideoPreviewBar.java

@@ -64,7 +64,7 @@ public class VideoPreviewBar extends RelativeLayout implements HardwareDecode.On
         txtVideoProgress = view.findViewById(R.id.txt_video_progress);
         txtVideoDuration = view.findViewById(R.id.txt_video_duration);
         setListener();
-        screenWidth = ScreenUtil.getScreenWidth(context);
+        screenWidth = ScreenUtil.INSTANCE.getScreenWidth(context);
     }
 
     @Override