Vibration added.

TODO: Write / Fetch Database Values & Calculate Time Difference

app/src/main/AndroidManifest.xml

@@ -10,7 +10,7 @@
     <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
     <uses-permission android:name="android.permission.INTERNET" />
     <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
-
+    <uses-permission android:name="android.permission.VIBRATE" />
     <application
         android:allowBackup="true"
         android:icon="@mipmap/schockicon"

app/src/main/java/de/edotzlaff/schockwelle/SensorMapsActivity.java

@@ -1,14 +1,20 @@
 package de.edotzlaff.schockwelle;
 
 import android.Manifest;
+import android.content.Context;
 import android.content.pm.PackageManager;
 import android.location.Location;
+import android.os.Build;
 import android.os.Bundle;
+import android.os.CountDownTimer;
+import android.os.VibrationEffect;
+import android.os.Vibrator;
 import android.util.Log;
 import android.widget.TextView;
 import android.widget.Toast;
 
 import androidx.annotation.NonNull;
+import androidx.annotation.RequiresApi;
 import androidx.core.app.ActivityCompat;
 import androidx.core.content.ContextCompat;
 import androidx.fragment.app.FragmentActivity;
@@ -52,6 +58,9 @@ public class SensorMapsActivity extends FragmentActivity implements OnMapReadyCa
 
     private DatabaseReference mDatenbank;
 
+    //Vibration
+    private Boolean mDeviceCanVibrate = false;
+
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
@@ -63,9 +72,10 @@ public class SensorMapsActivity extends FragmentActivity implements OnMapReadyCa
 
         getDataBaseValues();     // Hier werden die Daten von der DB abgefragt //TODO Edward: Geht wieder :D
 
+        getVibrationAbility();
         //distance(currentLocation.getLatitude(), currentLocation.getLongitude(),breitengrad,laengengrad); //Übergabe zur Berechnung der Distanz zwischen Auslöser und aktuellem Standort
-
         //TODO Patrick: die Funktion distance gibt Meter zurück, könntest Du das mit dem Zeitstempel und der Berechnung bis zur Vibration machen?
+        setVibrationTimer(10000,1000,255);
     }
 
     private void getLocationPermission() {
@@ -78,6 +88,80 @@ public class SensorMapsActivity extends FragmentActivity implements OnMapReadyCa
         }
     }
 
+
+    private void getVibrationAbility()
+    {
+        // Get instance of Vibrator from current Context
+        Vibrator v = (Vibrator) getSystemService(Context.VIBRATOR_SERVICE);
+
+        // Output yes if can vibrate, no otherwise
+        if (v.hasVibrator()) {
+            Log.v("Can Vibrate", "YES");
+        //     Log.v("Can Control Amplitude", v.hasAmplitudeControl() ? "YES" : "NO");
+            mDeviceCanVibrate = true;
+        }
+        else
+        {
+
+            Log.v("Can Vibrate", "NO");
+            mDeviceCanVibrate = false;
+        }
+    }
+
+    private long getTimeStampDifference(Date vibrationTime)
+    {
+        long diff= 0;
+        //TODO Zeitdifferenz in Millisekunden zwischen aktuellen Uhrzeit und Vibratonszeitstempel berechnen
+        return diff;
+    }
+    private void setVibrationTimer(long msDelay, int duration, int amplitude)
+    {
+
+        new CountDownTimer(msDelay, 1000) {
+            public void onTick(long millisUntilFinished) {
+                ((TextView)   findViewById(R.id.txtSensor)).setText("Earthquake hits in " + millisUntilFinished / 1000 + " s");
+            }
+
+            public void onFinish() {
+
+                Toast.makeText(getApplicationContext(), "The Ground is shaking!", Toast.LENGTH_SHORT).show();
+                performVibration(duration, amplitude);
+                ( (TextView)   findViewById(R.id.txtSensor)).setText("No Earthquake upcoming");
+            }
+        }.start();
+    }
+
+    public void performVibration(int duration, int amplitude) {
+        if(!mDeviceCanVibrate)
+            return;
+
+        Vibrator v = (Vibrator) getSystemService(Context.VIBRATOR_SERVICE);
+        if (Build.VERSION.SDK_INT >= 26) {
+            if(duration == 0)
+            {
+                v.cancel(); //stop vibration if still running
+                Toast.makeText(this,  "Vibration has been stopped", Toast.LENGTH_SHORT).show();
+                return;
+            }
+
+           Toast.makeText(this,  "Ampl: " + amplitude + ", Dur: " + duration, Toast.LENGTH_SHORT).show();
+
+            v.vibrate(VibrationEffect.createOneShot(duration,amplitude));
+
+
+        } else {
+
+            if(duration == 0)
+            {
+                v.cancel(); //stop vibration if still running
+
+                return;
+            }
+
+            v.vibrate(duration);
+        }
+    }
+
     @Override
     public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
         super.onRequestPermissionsResult(requestCode, permissions, grantResults);