ButtonTask替换为kotlin

app/src/main/java/com/bgycc/smartcanteen/task/ButtonTask.java

-package com.bgycc.smartcanteen.task;
-
-import android.content.Context;
-import android.media.AudioManager;
-import android.util.Log;
-import com.bgycc.smartcanteen.App;
-import com.szxb.jni.libszxb;
-
-import java.util.Timer;
-import java.util.TimerTask;
-import java.util.concurrent.Executors;
-import java.util.concurrent.ScheduledExecutorService;
-import java.util.concurrent.TimeUnit;
-
-public class ButtonTask {
-
-    private static final String TAG = ButtonTask.class.getSimpleName();
-
-    private static ButtonTask sInstance;
-
-    public static synchronized ButtonTask getInstance() {
-        if (sInstance == null) {
-            sInstance = new ButtonTask();
-        }
-        return sInstance;
-    }
-
-    private ScheduledExecutorService mScanExec;
-    private AudioManager mAudioManager;
-
-    private ButtonTask() {}
-
-    public void start() {
-        if (mScanExec == null) {
-            mAudioManager = (AudioManager) App.Companion.getDefault().getSystemService(Context.AUDIO_SERVICE);
-            mScanExec = Executors.newSingleThreadScheduledExecutor();
-            mScanExec.scheduleAtFixedRate(new LoopTimerTask(), 0, 200, TimeUnit.MILLISECONDS);
-        }
-    }
-
-    public void stop() {
-        mAudioManager = null;
-        if (mScanExec != null) {
-            mScanExec.shutdown();
-            mScanExec = null;
-        }
-    }
-
-    private class LoopTimerTask extends TimerTask {
-
-        @Override
-        public void run() {
-            try {
-                byte[] buf = new byte[5];
-                libszxb.devicekey(buf);
-//                Log.i(TAG, String.format("%02x %02x %02x %02x", buf[0], buf[1], buf[2], buf[3]));
-                if (buf[1] == 1) {
-                    mAudioManager.adjustStreamVolume(AudioManager.STREAM_SYSTEM, AudioManager.ADJUST_RAISE, AudioManager.FLAG_SHOW_UI);
-                }
-                if (buf[2] == 1) {
-                    mAudioManager.adjustStreamVolume(AudioManager.STREAM_SYSTEM, AudioManager.ADJUST_LOWER, AudioManager.FLAG_SHOW_UI);
-                }
-            } catch (Exception e) {
-                e.printStackTrace();
-            }
-        }
-    }
-}

app/src/main/java/com/bgycc/smartcanteen/task/ButtonTask.kt

+package com.bgycc.smartcanteen.task
+
+import android.content.Context
+import android.media.AudioManager
+import android.util.Log
+import com.bgycc.smartcanteen.App
+import com.bgycc.smartcanteen.helper.TimerHelper
+import com.szxb.jni.libszxb
+
+object ButtonTask {
+
+    private val TAG = ButtonTask::class.java.simpleName
+
+    private var mTimerId: Long = -1
+    private var mAudioManager: AudioManager? = null
+
+    fun start() {
+        if (mTimerId < 0) {
+            mAudioManager = App.getDefault().getSystemService(Context.AUDIO_SERVICE) as AudioManager
+            mTimerId = TimerHelper.loop({
+                val buf = ByteArray(5)
+                libszxb.devicekey(buf)
+                Log.i(TAG, String.format("%02x %02x %02x %02x", buf[0], buf[1], buf[2], buf[3]));
+                if (buf[1].toInt() == 1) {
+                    mAudioManager!!.adjustStreamVolume(
+                        AudioManager.STREAM_SYSTEM,
+                        AudioManager.ADJUST_RAISE,
+                        AudioManager.FLAG_SHOW_UI
+                    )
+                }
+                if (buf[2].toInt() == 1) {
+                    mAudioManager!!.adjustStreamVolume(
+                        AudioManager.STREAM_SYSTEM,
+                        AudioManager.ADJUST_LOWER,
+                        AudioManager.FLAG_SHOW_UI
+                    )
+                }
+                true
+            }, 200)
+        }
+    }
+
+    fun stop() {
+        mAudioManager = null
+        TimerHelper.cancel(mTimerId)
+        mTimerId = -1
+    }
+}
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