Add information about last wrong PIN/last shutdown to main screen

app/src/main/java/org/nuntius35/wrongpinshutdown/MainActivity.java

@@ -11,6 +11,7 @@ import android.preference.EditTextPreference;
 import android.preference.PreferenceManager;
 import android.preference.PreferenceFragment;
 import android.support.v7.app.AppCompatActivity;
+import android.widget.TextView;
 
 public class MainActivity extends AppCompatActivity {
     static final int ACTIVATION_REQUEST = 1;
@@ -41,6 +42,26 @@ public class MainActivity extends AppCompatActivity {
         }
 
         sm.testRoot();
+
+        updateStats(sm);
+    }
+
+    @Override
+    public void onResume() {
+        super.onResume();
+        sm = new ShutdownManager(context);
+        updateStats(sm);
+    }
+
+    public void updateStats(ShutdownManager sm) {
+        String lastWrong = sm.getLastWrong();
+        String lastShutdown = sm.getLastShutdown();
+        TextView textWrong = (TextView) findViewById(R.id.lastWrong);
+        textWrong.setText(getString(R.string.lastWrong));
+        textWrong.append(lastWrong);
+        TextView textShutdown = (TextView) findViewById(R.id.lastShutdown);
+        textShutdown.setText(getString(R.string.lastShutdown));
+        textShutdown.append(lastShutdown);
     }
 
     public static class MyPreferenceFragment extends PreferenceFragment

app/src/main/java/org/nuntius35/wrongpinshutdown/ShutdownManager.java

@@ -3,11 +3,15 @@ package org.nuntius35.wrongpinshutdown;
 import android.content.Context;
 import android.content.SharedPreferences;
 import android.preference.PreferenceManager;
+import java.util.Calendar;
+import java.util.Date;
 
 class ShutdownManager {
     private static final String TRIES_KEY = "tries";
     private static final String MAX_TRIES_KEY = "max_tries";
     private static final String SHUTDOWN_KEY = "shutdown_cmd";
+    private static final String LAST_WRONG_KEY = "last_wrong";
+    private static final String LAST_SHUTDOWN_KEY = "last_shutdown";
 
     private int tries;
     private int max_tries;
@@ -29,29 +33,41 @@ class ShutdownManager {
     void incTries() {
         tries++;
         sharedPref.edit().putInt(TRIES_KEY, tries).apply();
+        Date currentTime = Calendar.getInstance().getTime();
+        sharedPref.edit().putString(LAST_WRONG_KEY,currentTime.toString()).apply();
         max_tries = Integer.parseInt(sharedPref.getString(MAX_TRIES_KEY, "2"));
         if (tries > max_tries) {
-			resetTries();
-			shutdownDevice();
-		}
+            resetTries();
+            sharedPref.edit().putString(LAST_SHUTDOWN_KEY,currentTime.toString()).apply();
+            shutdownDevice();
+        }
     }
 
     private void shutdownDevice() {
         try {
             Process process = Runtime.getRuntime().exec(
-			new String[] { "su", "-c", shutdown_cmd});
-			process.waitFor();
+            new String[] { "su", "-c", shutdown_cmd});
+            process.waitFor();
         } catch (Exception ex) {
             ex.printStackTrace();
         }
     }
+
     void testRoot() {
         try {
             Process process = Runtime.getRuntime().exec(
-			new String[] {"su", "-c", "ls"});
-			process.waitFor();
+            new String[] {"su", "-c", "ls"});
+            process.waitFor();
         } catch (Exception ex) {
             ex.printStackTrace();
         }
     }
+
+    String getLastWrong() {
+        return sharedPref.getString(LAST_WRONG_KEY, "–");
+    }
+
+    String getLastShutdown() {
+        return sharedPref.getString(LAST_SHUTDOWN_KEY, "–");
+    }
 }

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

@@ -8,7 +8,7 @@
         android:orientation="vertical" >
 
         <TextView
-            android:id="@+id/textView"
+            android:id="@+id/textDescription"
             style="?android:attr/listSeparatorTextViewStyle"
             android:layout_width="fill_parent"
             android:layout_height="wrap_content"
@@ -20,5 +20,22 @@
             class="org.nuntius35.wrongpinshutdown.MainActivity$MyPreferenceFragment"
             android:layout_width="fill_parent"
             android:layout_height="250dp" />
+
+        <TextView
+            android:id="@+id/lastWrong"
+            style="?android:attr/listSeparatorTextViewStyle"
+            android:layout_width="fill_parent"
+            android:layout_height="wrap_content"
+            android:padding="10dp"
+            android:text="@string/lastWrong" />
+
+        <TextView
+            android:id="@+id/lastShutdown"
+            style="?android:attr/listSeparatorTextViewStyle"
+            android:layout_width="fill_parent"
+            android:layout_height="wrap_content"
+            android:padding="10dp"
+            android:text="@string/lastShutdown" />
     </LinearLayout>
+
 </ScrollView>

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

@@ -9,4 +9,6 @@
     <string name="settingAdvancedDialog">Den Befehl zum Abschalten verändern</string>
     <string name="settingShutdownCMD">Befehl zum Abschalten</string>
     <string name="shutdownHOWTO">Hier kann der Abschaltbefehl festegelegt werden.\nDie Standardeinstellung lautet \'reboot -p\'.\nEine andere Möglichkeit ist eventuell \'svc power shutdown\'.</string>
+    <string name="lastWrong" >Letzter falscher PIN: \n</string>
+    <string name="lastShutdown" >Letztes Abschalten aufgrund einer falschen PIN: \n</string>
 </resources>

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

@@ -9,4 +9,6 @@
     <string name="settingAdvancedDialog">Changez la commande pour arrêter le portable.</string>
     <string name="settingShutdownCMD">Commande pour arrêter le portable</string>
     <string name="shutdownHOWTO">Ici on peut changer la commande d\'arrêter.\nLa commande standarde: \'reboot -p\'.\nUne autre suggestion: \'svc power shutdown\'.</string>
+    <string name="lastWrong" >Dernier NIP faux: \n</string>
+    <string name="lastShutdown" >Dernier arrête dû aux NIP faux: \n</string>
 </resources>

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

@@ -10,4 +10,6 @@
     <string name="settingShutdownCMD">Shutdown command</string>
     <string name="shutdownHOWTO">Here you can specify which command is executed as root to shutdown the device.\nThe default value is \'reboot -p\'.\nAnother option might be \'svc power shutdown\'.</string>
     <string name="shutdownCMD" translatable="false">reboot -p</string>
+    <string name="lastWrong"> Last wrong PIN: \n</string>
+    <string name="lastShutdown"> Last shutdown due to wrong PIN: \n</string>
 </resources>