When the PIN is typed 4 wrong times, it has to block 15 seconds before make new tries

app/src/main/java/cy/agorise/crystalwallet/activities/PinRequestActivity.java

@@ -12,6 +12,7 @@ import android.text.Editable;
 import android.view.View;
 import android.widget.Button;
 import android.widget.EditText;
+import android.widget.TextView;
 import android.widget.Toast;
 
 import org.jetbrains.annotations.NotNull;
@@ -41,6 +42,19 @@ public class PinRequestActivity extends AppCompatActivity {
     @BindView(R.id.btnOK)
     Button btnOK;
 
+    @BindView(R.id.txtBadtry)
+    TextView txtBadtry;
+
+    /*
+    * Contains the bad tries
+    * */
+    private int tries = 0;
+
+    /*
+    * Seconds counter
+    * */
+    private int seconds = 15;
+
 
 
 
@@ -97,11 +111,74 @@ public class PinRequestActivity extends AppCompatActivity {
         }
         else{
 
+            /*
+            * One more bad try
+            * */
+            ++tries;
+
+            final Activity activity = this;
+
+            etPassword.setTextColor(Color.RED);
+
+            /*
+            * User can not go more up to 5 bad tries
+            * */
+            if(tries==4){
+                tries = 0;
+
+                btnOK.setEnabled(false);
+                etPassword.setEnabled(false);
+                txtBadtry.setVisibility(View.VISIBLE);
+
+                txtBadtry.setText(txtBadtry.getText().toString().replace("%%",String.valueOf(seconds)));
+
+                final Timer t = new Timer();
+                //Set the schedule function and rate
+                t.scheduleAtFixedRate(new TimerTask() {
+
+                                          @Override
+                                          public void run() {
+
+                                              --seconds;
+
+                                              if(seconds==0){
+                                                  t.cancel();
+
+                                                  seconds = 15;
+
+                                                  activity.runOnUiThread(new Runnable() {
+                                                      @Override
+                                                      public void run() {
+                                                          btnOK.setEnabled(true);
+                                                          etPassword.setEnabled(true);
+                                                          txtBadtry.setVisibility(View.INVISIBLE);
+                                                          etPassword.setText("");
+                                                          etPassword.setTextColor(Color.WHITE);
+                                                      }
+                                                  });
+                                              }
+                                              else{
+                                                  activity.runOnUiThread(new Runnable() {
+                                                      @Override
+                                                      public void run() {
+                                                          txtBadtry.setText(activity.getResources().getString(R.string.wrong_pin_wait).replace("%%",String.valueOf(seconds)));
+                                                      }
+                                                  });
+                                              }
+                                          }
+
+                                      },
+                        //Set how long before to start calling the TimerTask (in milliseconds)
+                        1000,
+                        //Set the amount of time between each execution (in milliseconds)
+                        1000);
+
+                return;
+            }
+
             /*
             *   Set in red the rext and reset the password after a period of time
             * */
-            final Activity activity = this;
-            etPassword.setTextColor(Color.RED);
             final Timer t = new Timer();
             //Set the schedule function and rate
             t.scheduleAtFixedRate(new TimerTask() {

app/src/main/res/layout/activity_pin_request.xml

@@ -45,4 +45,16 @@
         android:textSize="18dp"
         android:layout_alignParentRight="true"/>
 
+    <TextView
+        android:id="@+id/txtBadtry"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_below="@+id/btnOK"
+        android:text="@string/wrong_pin_wait"
+        android:layout_marginTop="5dp"
+        android:layout_alignParentRight="true"
+        android:textColor="@color/red"
+        android:layout_marginRight="10dp"
+        android:visibility="invisible"/>
+
 </RelativeLayout>

app/src/main/res/values/strings.xml

@@ -206,6 +206,8 @@
     <string name="fee_capital">Fee</string>
     <string name="ok">OK</string>
 
+    <string name="wrong_pin_wait">Wrong PIN you have to wait %% seconds ...</string>
+
     <string name="loading">Loading...</string>
     <string name="pay_to">Pay to</string>