Change OnTouch Methods to GestureHandler

app/src/main/java/com/finnmglas/launcher/MainActivity.kt

@@ -1,18 +1,15 @@
 package com.finnmglas.launcher
 
 import android.annotation.SuppressLint
+import android.content.Context
 import android.content.Intent
+import android.content.SharedPreferences.Editor
 import android.os.Bundle
 import android.util.DisplayMetrics
-import android.view.KeyEvent
-import android.view.MotionEvent
-import android.view.View
-import android.view.View.OnLongClickListener
-import android.view.View.OnTouchListener
-import android.view.WindowManager
+import android.view.*
 import android.widget.Toast
 import androidx.appcompat.app.AppCompatActivity
-import androidx.core.view.MotionEventCompat
+import androidx.core.view.GestureDetectorCompat
 import kotlinx.android.synthetic.main.activity_main.*
 import java.text.SimpleDateFormat
 import java.util.*
@@ -27,7 +24,13 @@ var leftApp = "com.google.android.calendar"
 var volumeUpApp = "com.whatsapp"
 var volumeDownApp = "com.sec.android.app.popupcalculator"
 
-class MainActivity : AppCompatActivity() {
+class MainActivity : AppCompatActivity(),
+GestureDetector.OnGestureListener,
+GestureDetector.OnDoubleTapListener {
+
+
+    private lateinit var mDetector: GestureDetectorCompat
+
     // get device dimensions
     val displayMetrics = DisplayMetrics()
 
@@ -51,91 +54,49 @@ class MainActivity : AppCompatActivity() {
                 applicationContext.startActivity(intent2)
                 overridePendingTransition(0, 0)
             } else {
-                Toast.makeText(this, "Package '$packageName' not found. Change your Settings.", Toast.LENGTH_SHORT).show()
+                Toast.makeText(
+                    this,
+                    "Package '$packageName' not found. Change your Settings.",
+                    Toast.LENGTH_SHORT
+                ).show()
             }
         }
     }
 
-    fun launchCalendar(v: View){ launchApp("com.google.android.calendar", "com.samsung.android.calendar") }
-    fun launchClock(v: View){ launchApp("com.sec.android.app.clockpackage") }
+    fun launchCalendar(v: View) {
+        launchApp("com.google.android.calendar", "com.samsung.android.calendar")
+    }
 
-    fun launchUpApp() { launchApp(upApp) }
-    fun launchDownApp() { launchApp(downApp) }
-    fun lauchLeftApp() { launchApp(leftApp) }
-    fun lauchRightApp() { launchApp(rightApp) }
+    fun launchClock(v: View) {
+        launchApp("com.sec.android.app.clockpackage")
+    }
 
-    fun lauchVolumeUpApp() { launchApp(volumeUpApp) }
-    fun lauchVolumeDownApp() { launchApp(volumeDownApp) }
+    fun launchUpApp() {
+        launchApp(upApp)
+    }
+
+    fun launchDownApp() {
+        launchApp(downApp)
+    }
+
+    fun lauchLeftApp() {
+        launchApp(leftApp)
+    }
+
+    fun lauchRightApp() {
+        launchApp(rightApp)
+    }
+
+    fun lauchVolumeUpApp() {
+        launchApp(volumeUpApp)
+    }
+
+    fun lauchVolumeDownApp() {
+        launchApp(volumeDownApp)
+    }
 
     /* Overrides */
 
-    var touchX : Float = 0F
-    var touchY : Float = 0F
-    var touchT : Long = 0L
-
-    override fun onTouchEvent(event: MotionEvent): Boolean {
-
-        return when (MotionEventCompat.getActionMasked(event)) {
-            MotionEvent.ACTION_DOWN -> {
-                touchX = event.x
-                touchY = event.y
-                touchT = System.currentTimeMillis()
-
-                true
-            }
-            MotionEvent.ACTION_MOVE -> {
-                true
-            }
-            MotionEvent.ACTION_UP -> {
-                windowManager.defaultDisplay.getMetrics(displayMetrics)
-
-                val width = displayMetrics.widthPixels
-                val height = displayMetrics.heightPixels
-
-                val diffX = touchX - event.x
-                val diffY = touchY - event.y
-                val diffT = System.currentTimeMillis() - touchT
-
-                val strictness = 4 // of direction
-
-                /* Decide for an action */
-
-                if (diffY > height/8
-                    && abs(diffY) > strictness * abs(diffX))
-                    launchUpApp()
-
-                // Only open if the swipe was not from the phone edge
-                else if (diffY < -height/8
-                    && abs(diffY) > strictness * abs(diffX)
-                    && touchY > 100)
-                    launchDownApp()
-
-                else if (diffX > width/4
-                    && abs(diffX) > strictness * abs(diffY))
-                    lauchLeftApp()
-
-                else if (diffX < -width/4
-                    && abs(diffX) > strictness * abs(diffY))
-                    lauchRightApp()
-
-                // Open Settings on LongPress
-                else if (abs(diffX) < 10
-                    && abs(diffX) < 10 && diffT > 750){
-                    startActivity(Intent(this, SettingsActivity::class.java))
-                }
-
-                true
-            }
-            MotionEvent.ACTION_CANCEL -> {
-                true
-            }
-            MotionEvent.ACTION_OUTSIDE -> {
-                true
-            }
-            else -> super.onTouchEvent(event)
-        }
-    }
-
     override fun onKeyDown(keyCode: Int, event: KeyEvent?): Boolean {
         if (keyCode == KeyEvent.KEYCODE_BACK) return true
         else if (keyCode == KeyEvent.KEYCODE_VOLUME_UP) lauchVolumeUpApp()
@@ -147,7 +108,10 @@ class MainActivity : AppCompatActivity() {
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
 
-        window.setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN)
+        window.setFlags(
+            WindowManager.LayoutParams.FLAG_FULLSCREEN,
+            WindowManager.LayoutParams.FLAG_FULLSCREEN
+        )
         window.addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON)
 
         val dateFormat = SimpleDateFormat("yyyy-MM-dd", Locale.getDefault())
@@ -161,5 +125,86 @@ class MainActivity : AppCompatActivity() {
         }
 
         setContentView(R.layout.activity_main)
+
+        mDetector = GestureDetectorCompat(this, this)
+        mDetector.setOnDoubleTapListener(this)
+    }
+
+    override fun onTouchEvent(event: MotionEvent): Boolean {
+        return if (mDetector.onTouchEvent(event)) {
+            true
+        } else {
+            super.onTouchEvent(event)
         }
     }
+
+    override fun onDown(event: MotionEvent): Boolean {
+        return true
+    }
+
+    override fun onFling(
+        e1: MotionEvent,
+        e2: MotionEvent,
+        differenceX: Float,
+        differenceY: Float
+    ): Boolean {
+
+        windowManager.defaultDisplay.getMetrics(displayMetrics)
+        val width = displayMetrics.widthPixels
+        val height = displayMetrics.heightPixels
+
+        val diffX = e1.x - e2.x
+        val diffY = e1.y - e2.y
+
+        val strictness = 4 // of direction
+
+        /* Decide for an action */
+
+        if (diffY > height / 8 && abs(diffY) > strictness * abs(diffX)) launchUpApp()
+        // Only open if the swipe was not from the phone edge
+        else if (diffY < -height / 8 && abs(diffY) > strictness * abs(diffX) && e1.y > 100) launchDownApp()
+        else if (diffX > width / 4 && abs(diffX) > strictness * abs(diffY)) lauchLeftApp()
+        else if (diffX < -width / 4 && abs(diffX) > strictness * abs(diffY)) lauchRightApp()
+
+        return true
+    }
+
+    // Open Settings
+    override fun onLongPress(event: MotionEvent) {
+        startActivity(Intent(this, SettingsActivity::class.java))
+    }
+
+    override fun onScroll(
+        e1: MotionEvent,
+        e2: MotionEvent,
+        diffX: Float,
+        diffY: Float
+    ): Boolean {
+        return true
+    }
+
+    override fun onShowPress(event: MotionEvent) {
+
+    }
+
+    override fun onSingleTapUp(event: MotionEvent): Boolean {
+
+        return true
+    }
+
+    override fun onDoubleTap(event: MotionEvent): Boolean {
+
+        return true
+    }
+
+    override fun onDoubleTapEvent(event: MotionEvent): Boolean {
+
+        return true
+    }
+
+    override fun onSingleTapConfirmed(event: MotionEvent): Boolean {
+
+        return true
+    }
+
+}