Remove on-screen diagnostics from the Logs tab

They served their purpose: vehicle values show on the car. This reverts
commit b2a5b32.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

SPECS.md

@@ -42,8 +42,6 @@ what has been changed, and what is still to do.
 - 2026-10-17 — Renamed to "Nils' MG4": package ID `com.stinnesbeck.nilsmg4` (`.unstable` for the car
   build), APK names `NilsMG4-*.apk`. It installs next to the old FatihsMG4 app instead of replacing
   it, and starts with empty settings and history.
-- 2026-10-17 — Diagnostics section on the Logs tab: UID, signer, car permissions, last vehicle
-  read and its error, and the vehicle library's in-app log. For debugging without adb.
 
 ## Installing on the car
 

app/src/main/java/com/evsuite/abrp/MainActivity.java

@@ -102,16 +102,6 @@ public class MainActivity extends AppCompatActivity {
     private ChargeSessionTracker chargeSessionTracker;
     private ChargingGraphView chargeGraph;
 
-    /**
-     * What the vehicle reads last did, for the diagnostics section of the Logs page. A failed
-     * read leaves the cells showing a dash, which looks the same as a signal the car does not
-     * publish; this is the only on-screen trace of why.
-     */
-    private TextView diagnosticsText;
-    private volatile EnergySnapshot lastVehicleSnapshot;
-    private volatile long lastVehicleReadOkMs;
-    private volatile String lastVehicleReadError;
-
     /**
      * Inflates a page with no parent, then gives it the MATCH_PARENT/MATCH_PARENT layout
      * params ViewPager2 requires of its items — inflating detached leaves them null, and
@@ -178,7 +168,6 @@ public class MainActivity extends AppCompatActivity {
         }
         ((TextView) findViewById(R.id.header_title)).setText(PAGE_TITLES[position]);
         ((TextView) findViewById(R.id.header_subtitle)).setText(PAGE_SUBTITLES[position]);
-        if (panes[position] == logPane) refreshDiagnostics();
     }
 
     /** Refreshes state + call log while the screen is visible. */
@@ -227,9 +216,6 @@ public class MainActivity extends AppCompatActivity {
         statusText          = servicePane.findViewById(R.id.status_text);
         callLogText = logPane.findViewById(R.id.call_log_text);
         logPane.findViewById(R.id.flush_now_button).setOnClickListener(v -> manualFlush());
-        diagnosticsText = logPane.findViewById(R.id.diagnostics_text);
-        logPane.findViewById(R.id.diagnostics_refresh_button)
-                .setOnClickListener(v -> refreshDiagnostics());
 
         setUpPager();
         findViewById(R.id.about_button).setOnClickListener(v -> showAbout());
@@ -421,8 +407,6 @@ public class MainActivity extends AppCompatActivity {
             }
             // The timestamp is passed explicitly: its Kotlin default is not visible from Java.
             EnergySnapshot s = vehicleReader.read(System.currentTimeMillis());
-            lastVehicleSnapshot = s;
-            lastVehicleReadOkMs = System.currentTimeMillis();
             ConsumptionTracker.get(this).sample(s);
             refreshCharging(s);
 
@@ -439,12 +423,8 @@ public class MainActivity extends AppCompatActivity {
             vehTireFr.setText(fmt(s.getTirePressures().getFrontRightKpa(), "%.0f kPa"));
             vehTireRl.setText(fmt(s.getTirePressures().getRearLeftKpa(), "%.0f kPa"));
             vehTireRr.setText(fmt(s.getTirePressures().getRearRightKpa(), "%.0f kPa"));
-        } catch (Throwable t) {
+        } catch (Throwable ignored) {
-            // Leave the last good reading on screen, but keep the reason for the diagnostics.
+            // Leave the last good reading on screen.
-            String trace = android.util.Log.getStackTraceString(t);
-            lastVehicleReadError = new java.text.SimpleDateFormat("HH:mm:ss", java.util.Locale.US)
-                    .format(new java.util.Date()) + "  "
-                    + (trace.length() > 2000 ? trace.substring(0, 2000) + "…" : trace);
         }
     }
 
@@ -769,84 +749,6 @@ public class MainActivity extends AppCompatActivity {
         callLogText.setText(sb.toString());
     }
 
-    // ---------- Diagnostics ----------
-
-    /**
-     * Fills the diagnostics section: who the app runs as, how it is signed, which car
-     * permissions it holds, what the last vehicle read returned, and the in-app log of the
-     * vehicle library. On the head unit there is no adb, so this is what can be photographed.
-     */
-    private void refreshDiagnostics() {
-        if (diagnosticsText == null) return;
-        java.text.SimpleDateFormat time = new java.text.SimpleDateFormat("HH:mm:ss", java.util.Locale.US);
-        StringBuilder sb = new StringBuilder();
-        int uid = android.os.Process.myUid();
-        sb.append("Package      ").append(getPackageName()).append('\n');
-        sb.append("Version      ").append(BuildConfig.VERSION_NAME).append('\n');
-        sb.append("UID          ").append(uid)
-          .append(uid == android.os.Process.SYSTEM_UID ? "  (system — OK)" : "  (NOT system)").append('\n');
-        sb.append("Firmware     ").append(safe(() -> com.evsuite.hardware.FirmwareInfo.INSTANCE.getDetectedString()))
-          .append('\n');
-        PackageManager pm = getPackageManager();
-        try {
-            @SuppressWarnings("deprecation")
-            android.content.pm.PackageInfo info = pm.getPackageInfo(getPackageName(),
-                    PackageManager.GET_SIGNATURES | PackageManager.GET_PERMISSIONS);
-            if (info.signatures != null && info.signatures.length > 0) {
-                byte[] digest = java.security.MessageDigest.getInstance("SHA-256")
-                        .digest(info.signatures[0].toByteArray());
-                StringBuilder hex = new StringBuilder();
-                for (byte b : digest) hex.append(String.format(java.util.Locale.US, "%02x", b));
-                sb.append("Signer       ").append(hex).append('\n');
-            }
-            if (info.requestedPermissions != null) {
-                sb.append("Permissions\n");
-                for (String p : info.requestedPermissions) {
-                    if (!p.startsWith("android.car.")) continue;
-                    boolean granted = checkSelfPermission(p) == PackageManager.PERMISSION_GRANTED;
-                    sb.append("  ").append(granted ? "granted  " : "DENIED   ")
-                      .append(p.substring(p.lastIndexOf('.') + 1)).append('\n');
-                }
-            }
-        } catch (Exception e) {
-            sb.append("Package info unavailable: ").append(e).append('\n');
-        }
-
-        sb.append('\n').append("Last vehicle read  ")
-          .append(lastVehicleReadOkMs > 0 ? time.format(new java.util.Date(lastVehicleReadOkMs)) : "never")
-          .append('\n');
-        EnergySnapshot s = lastVehicleSnapshot;
-        if (s != null) {
-            sb.append("  SOC ").append(s.getSocPercent())
-              .append("  range ").append(s.getRangeKm())
-              .append("  speed ").append(s.getSpeedKmh())
-              .append("  power ").append(s.getBatteryPowerKw()).append('\n')
-              .append("  odometer ").append(s.getOdometerKm())
-              .append("  charge status ").append(s.getChargingStatus())
-              .append("  port ").append(s.getChargePortConnected()).append('\n');
-        }
-        String error = lastVehicleReadError;
-        if (error != null) sb.append("Last read error  ").append(error).append('\n');
-
-        java.util.List<com.evsuite.hardware.AppLogger.Entry> entries =
-                com.evsuite.hardware.AppLogger.INSTANCE.getEntries();
-        int shown = Math.min(entries.size(), 200);
-        sb.append('\n').append("Vehicle library log (newest first, ").append(shown)
-          .append(" of ").append(entries.size()).append(")\n");
-        for (int i = entries.size() - 1; i >= entries.size() - shown; i--) {
-            com.evsuite.hardware.AppLogger.Entry e = entries.get(i);
-            sb.append(e.getTime()).append(' ').append(e.getLevel().name().charAt(0)).append('/')
-              .append(e.getTag()).append(": ").append(e.getMsg()).append('\n');
-        }
-        diagnosticsText.setText(sb.toString());
-    }
-
-    private interface StringSupplier { String get() throws Exception; }
-
-    private static String safe(StringSupplier supplier) {
-        try { return supplier.get(); } catch (Throwable t) { return "unavailable (" + t + ")"; }
-    }
-
     // ---------- Service status ----------
 
     private void refreshStatus() {

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

@@ -4,8 +4,5 @@
         <TextView android:layout_width="match_parent" android:layout_height="wrap_content" android:text="@string/label_call_log" android:textAppearance="@style/Text.EV.Eyebrow" />
         <com.google.android.material.button.MaterialButton android:id="@+id/flush_now_button" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_marginTop="16dp" android:text="@string/btn_flush_now" app:icon="@drawable/ic_refresh" app:iconGravity="textStart" style="@style/Widget.EV.Button.Outlined" xmlns:app="http://schemas.android.com/apk/res-auto" />
         <TextView android:id="@+id/call_log_text" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_marginTop="20dp" android:minHeight="180dp" android:text="@string/call_log_empty" android:textAppearance="@style/Text.EV.Body" android:fontFamily="monospace" android:textSize="17sp" android:lineSpacingExtra="12dp" android:textIsSelectable="true" />
-        <TextView android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_marginTop="32dp" android:text="@string/label_diagnostics" android:textAppearance="@style/Text.EV.Eyebrow" />
-        <com.google.android.material.button.MaterialButton android:id="@+id/diagnostics_refresh_button" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_marginTop="16dp" android:text="@string/btn_refresh_diagnostics" app:icon="@drawable/ic_refresh" app:iconGravity="textStart" style="@style/Widget.EV.Button.Outlined" xmlns:app="http://schemas.android.com/apk/res-auto" />
-        <TextView android:id="@+id/diagnostics_text" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_marginTop="20dp" android:textAppearance="@style/Text.EV.Body" android:fontFamily="monospace" android:textSize="14sp" android:lineSpacingExtra="4dp" android:textIsSelectable="true" />
     </LinearLayout>
 </ScrollView>

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

@@ -107,8 +107,6 @@
     <!-- Call log -->
     <string name="label_call_log">Recent uploads</string>
     <string name="call_log_empty">No upload attempted yet.</string>
-    <string name="label_diagnostics">Diagnostics</string>
-    <string name="btn_refresh_diagnostics">Refresh diagnostics</string>
     <string name="btn_flush_now">Upload now</string>
     <string name="status_starting">Starting…</string>
     <string name="status_running_no_upload">Running — waiting for first upload</string>