Add a developer option to increase nfc stack log level

Easier to increase nfc stack log level.

Bug: 187083201
Test: enable/disable from developer option and check nfc log
Change-Id: I0675cbd535a2faf3b77b2842b03b7fb3b1b782fa

res/values/strings.xml

@@ -1720,6 +1720,11 @@
     <!-- Bluetooth developer settings: Maximum number of connected audio devices -->
     <string name="bluetooth_max_connected_audio_devices_dialog_title">Select maximum number of connected Bluetooth audio devices</string>
 
+    <!-- Nfc developer settings: Maximum number of connected audio devices -->
+    <string name="nfc_stack_debuglog_title">Enable Nfc stack debuglog</string>
+    <!-- Nfc developer settings: Maximum number of connected audio devices -->
+    <string name="nfc_stack_debuglog_summary">Increase Nfc stack logging level</string>
+
     <!-- Wifi Display settings. The title of the screen. [CHAR LIMIT=40] -->
     <string name="wifi_display_settings_title">Cast</string>
     <!-- Wifi Display settings. The keywords of the setting. [CHAR LIMIT=NONE] -->

res/xml/development_settings.xml

@@ -392,6 +392,11 @@
             android:entries="@array/bluetooth_max_connected_audio_devices"
             android:entryValues="@array/bluetooth_max_connected_audio_devices_values" />
 
+        <SwitchPreference
+            android:key="nfc_stack_debuglog_enabled"
+            android:title="@string/nfc_stack_debuglog_title"
+            android:summary="@string/nfc_stack_debuglog_summary" />
+
     </PreferenceCategory>
 
     <PreferenceCategory

src/com/android/settings/development/DevelopmentSettingsDashboardFragment.java

@@ -516,6 +516,7 @@ public class DevelopmentSettingsDashboardFragment extends RestrictedDashboardFra
         controllers.add(new BluetoothMapVersionPreferenceController(context));
         controllers.add(new BluetoothA2dpHwOffloadPreferenceController(context, fragment));
         controllers.add(new BluetoothMaxConnectedAudioDevicesPreferenceController(context));
+        controllers.add(new NfcStackDebugLogPreferenceController(context));
         controllers.add(new ShowTapsPreferenceController(context));
         controllers.add(new PointerLocationPreferenceController(context));
         controllers.add(new ShowSurfaceUpdatesPreferenceController(context));

src/com/android/settings/development/NfcStackDebugLogPreferenceController.java

@@ -0,0 +1,82 @@
+/*
+ * Copyright (C) 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.settings.development;
+
+import android.content.Context;
+import android.os.SystemProperties;
+import android.util.Log;
+
+import androidx.annotation.VisibleForTesting;
+import androidx.preference.Preference;
+import androidx.preference.SwitchPreference;
+
+import com.android.settings.core.PreferenceControllerMixin;
+import com.android.settingslib.development.DeveloperOptionsPreferenceController;
+
+public class NfcStackDebugLogPreferenceController extends
+        DeveloperOptionsPreferenceController implements Preference.OnPreferenceChangeListener,
+        PreferenceControllerMixin {
+
+    private static final String NFC_STACK_DEBUGLOG_ENABLED_KEY =
+            "nfc_stack_debuglog_enabled";
+    @VisibleForTesting
+    static final String NFC_STACK_DEBUGLOG_ENABLED_PROPERTY =
+            "persist.nfc.debug_enabled";
+
+    public NfcStackDebugLogPreferenceController(Context context) {
+        super(context);
+    }
+
+    @Override
+    public String getPreferenceKey() {
+        return NFC_STACK_DEBUGLOG_ENABLED_KEY;
+    }
+
+    @Override
+    public boolean onPreferenceChange(Preference preference, Object newValue) {
+        final boolean isEnabled = (Boolean) newValue;
+        try {
+            SystemProperties.set(NFC_STACK_DEBUGLOG_ENABLED_PROPERTY,
+                    isEnabled ? "true" : "false");
+        } catch (RuntimeException e) {
+            Log.e(TAG, "Fail to set nfc system property: " + e.getMessage());
+        }
+        return true;
+    }
+
+    @Override
+    public void updateState(Preference preference) {
+        try {
+            final boolean isEnabled = SystemProperties.getBoolean(
+                    NFC_STACK_DEBUGLOG_ENABLED_PROPERTY, false /* default */);
+            ((SwitchPreference) mPreference).setChecked(isEnabled);
+        } catch (RuntimeException e) {
+            Log.e(TAG, "Fail to get nfc system property: " + e.getMessage());
+        }
+    }
+
+    @Override
+    protected void onDeveloperOptionsSwitchDisabled() {
+        super.onDeveloperOptionsSwitchDisabled();
+        try {
+            SystemProperties.set(NFC_STACK_DEBUGLOG_ENABLED_PROPERTY, "false");
+            ((SwitchPreference) mPreference).setChecked(false);
+        } catch (RuntimeException e) {
+            Log.e(TAG, "Fail to set nfc system property: " + e.getMessage());
+        }
+    }
+}

tests/unit/src/com/android/settings/development/NfcStackDebugLogPreferenceControllerTest.java

@@ -0,0 +1,112 @@
+/*
+ * Copyright (C) 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.settings.development;
+
+import static com.android.settings.development.NfcStackDebugLogPreferenceController
+        .NFC_STACK_DEBUGLOG_ENABLED_PROPERTY;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import android.content.Context;
+import android.os.Looper;
+import android.os.SystemProperties;
+
+import androidx.preference.SwitchPreference;
+import androidx.preference.PreferenceManager;
+import androidx.preference.PreferenceScreen;
+import androidx.test.core.app.ApplicationProvider;
+import androidx.test.ext.junit.runners.AndroidJUnit4;
+
+import org.junit.Before;
+import org.junit.Rule;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+@RunWith(AndroidJUnit4.class)
+public class NfcStackDebugLogPreferenceControllerTest {
+
+    private Context mContext;
+    private NfcStackDebugLogPreferenceController mController;
+    private SwitchPreference mPreference;
+
+    @Before
+    public void setUp() {
+        mContext = ApplicationProvider.getApplicationContext();
+        mController = new NfcStackDebugLogPreferenceController(mContext);
+        if (Looper.myLooper() == null) {
+            Looper.prepare();
+        }
+
+        final PreferenceManager preferenceManager = new PreferenceManager(mContext);
+        final PreferenceScreen screen = preferenceManager.createPreferenceScreen(mContext);
+        mPreference = new SwitchPreference(mContext);
+        mPreference.setKey(mController.getPreferenceKey());
+        screen.addPreference(mPreference);
+        mController.displayPreference(screen);
+    }
+
+    @Test
+    public void onPreferenceChanged_settingDisabled_shouldTurnOffNfcStackDebugLog() {
+        mController.onPreferenceChange(mPreference, false /* new value */);
+
+        final boolean mode = SystemProperties.getBoolean(
+                NFC_STACK_DEBUGLOG_ENABLED_PROPERTY, false /* default */);
+
+        assertThat(mode).isFalse();
+    }
+
+    @Test
+    public void onPreferenceChanged_settingEnabled_shouldTurnOnNfcStackDebugLog() {
+        mController.onPreferenceChange(mPreference, true /* new value */);
+
+        final boolean mode = SystemProperties.getBoolean(
+                NFC_STACK_DEBUGLOG_ENABLED_PROPERTY, false /* default */);
+
+        assertThat(mode).isTrue();
+    }
+
+    @Test
+    public void updateState_settingEnabled_preferenceShouldBeChecked() {
+        SystemProperties.set(NFC_STACK_DEBUGLOG_ENABLED_PROPERTY,
+                Boolean.toString(true));
+
+        mController.updateState(mPreference);
+        assertThat(mPreference.isChecked()).isTrue();
+    }
+
+    @Test
+    public void updateState_settingDisabled_preferenceShouldNotBeChecked() {
+        SystemProperties.set(NFC_STACK_DEBUGLOG_ENABLED_PROPERTY,
+                Boolean.toString(false));
+
+        mController.updateState(mPreference);
+        assertThat(mPreference.isChecked()).isFalse();
+    }
+
+    @Test
+    public void onDeveloperOptionsDisabled_shouldDisablePreference() {
+        mController.onDeveloperOptionsSwitchDisabled();
+        final boolean mode = SystemProperties.getBoolean(
+                NFC_STACK_DEBUGLOG_ENABLED_PROPERTY,
+                false /* default */);
+
+        mController.updateState(mPreference);
+
+        assertThat(mode).isFalse();
+        assertThat(mPreference.isChecked()).isFalse();
+    }
+}