Show error message when inputting invalid audio sharing password.

Test: atest
Bug: b/356071394
Flag: com.android.settingslib.flags.enable_le_audio_sharing
Change-Id: I6e1ff6d32175ad6e4286db922645d608a2708c45

res/layout/audio_sharing_password_dialog.xml

@@ -35,6 +35,17 @@
             android:layout_marginEnd="20dp"
             android:minHeight="48dp" />
 
+        <TextView
+            android:id="@+id/edit_alert_message"
+            style="?android:attr/textAppearanceSmall"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:layout_marginStart="24dp"
+            android:layout_marginEnd="24dp"
+            android:visibility="gone"
+            android:text="@string/audio_streams_main_page_password_dialog_format_alert"
+            android:textColor="?android:attr/colorError" />
+
         <LinearLayout
             android:layout_width="match_parent"
             android:layout_height="wrap_content"

res/values/strings.xml

@@ -13725,8 +13725,10 @@
     <string name="audio_streams_main_page_password_dialog_join_button">Listen to stream</string>
     <!-- Le audio streams main page qr code scanner summary [CHAR LIMIT=NONE] -->
     <string name="audio_streams_main_page_qr_code_scanner_summary">Scan an audio stream QR code to listen with <xliff:g example="LE headset" id="device_name">%1$s</xliff:g></string>
-    <!-- Le audio streams password dialog  [CHAR LIMIT=NONE] -->
+    <!-- Le audio streams password dialog not editable message [CHAR LIMIT=NONE] -->
     <string name="audio_streams_main_page_password_dialog_cannot_edit">Can\u0027t edit password while sharing. To change the password, first turn off audio sharing.</string>
+    <!-- Le audio streams password dialog password format alert [CHAR LIMIT=NONE] -->
+    <string name="audio_streams_main_page_password_dialog_format_alert">Your password must contain 4-16 characters and use only letters, numbers and symbols</string>
     <!-- Text for audio sharing qrcode scanner [CHAR LIMIT=none]-->
     <string name="audio_streams_qr_code_scanner_label">QR code scanner</string>
     <!-- Learn more link for audio sharing qrcode [CHAR LIMIT=none]-->

src/com/android/settings/connecteddevice/audiosharing/AudioSharingPasswordPreference.java

@@ -41,6 +41,7 @@ public class AudioSharingPasswordPreference extends ValidatedEditTextPreference
     @Nullable private EditText mEditText;
     @Nullable private CheckBox mCheckBox;
     @Nullable private View mDialogMessage;
+    @Nullable private View mEditTextFormatAlert;
     private boolean mEditable = true;
 
     interface OnDialogEventListener {
@@ -77,6 +78,7 @@ public class AudioSharingPasswordPreference extends ValidatedEditTextPreference
         mEditText = view.findViewById(android.R.id.edit);
         mCheckBox = view.findViewById(R.id.audio_sharing_stream_password_checkbox);
         mDialogMessage = view.findViewById(android.R.id.message);
+        mEditTextFormatAlert = view.findViewById(R.id.edit_alert_message);
 
         if (mEditText == null || mCheckBox == null || mDialogMessage == null) {
             Log.w(TAG, "onBindDialogView() : Invalid layout");
@@ -123,6 +125,14 @@ public class AudioSharingPasswordPreference extends ValidatedEditTextPreference
         mDialogMessage.setVisibility(editable ? GONE : VISIBLE);
     }
 
+    void showEditTextFormatAlert(boolean show) {
+        if (mEditTextFormatAlert == null) {
+            Log.w(TAG, "showEditTextFormatAlert() : Invalid layout");
+            return;
+        }
+        mEditTextFormatAlert.setVisibility(show ? VISIBLE : GONE);
+    }
+
     void setChecked(boolean checked) {
         if (mCheckBox == null) {
             Log.w(TAG, "setChecked() : Invalid layout");

src/com/android/settings/connecteddevice/audiosharing/AudioSharingPasswordPreferenceController.java

@@ -136,7 +136,11 @@ public class AudioSharingPasswordPreferenceController extends BasePreferenceCont
 
     @Override
     public boolean isTextValid(String value) {
-        return mAudioSharingPasswordValidator.isTextValid(value);
+        boolean isValid = mAudioSharingPasswordValidator.isTextValid(value);
+        if (mPreference != null) {
+            mPreference.showEditTextFormatAlert(!isValid);
+        }
+        return isValid;
     }
 
     @Override

tests/robotests/src/com/android/settings/connecteddevice/audiosharing/AudioSharingPasswordPreferenceControllerTest.java

@@ -320,16 +320,37 @@ public class AudioSharingPasswordPreferenceControllerTest {
     }
 
     @Test
-    public void idTextValid_emptyString() {
+    public void isTextValid_emptyString() {
         boolean valid = mController.isTextValid("");
 
         assertThat(valid).isFalse();
     }
 
+
     @Test
-    public void idTextValid_validPassword() {
+    public void isTextValid_emptyString_showEditTextFormatAlert() {
+        mController.displayPreference(mScreen);
+        ShadowLooper.idleMainLooper();
+        boolean valid = mController.isTextValid("");
+
+        assertThat(valid).isFalse();
+        verify(mPreference).showEditTextFormatAlert(true);
+    }
+
+    @Test
+    public void isTextValid_validPassword() {
         boolean valid = mController.isTextValid(BROADCAST_PASSWORD);
 
         assertThat(valid).isTrue();
     }
+
+    @Test
+    public void isTextValid_validPassword_hideEditTextFormatAlert() {
+        mController.displayPreference(mScreen);
+        ShadowLooper.idleMainLooper();
+        boolean valid = mController.isTextValid(BROADCAST_PASSWORD);
+
+        assertThat(valid).isTrue();
+        verify(mPreference).showEditTextFormatAlert(false);
+    }
 }

tests/robotests/src/com/android/settings/connecteddevice/audiosharing/AudioSharingPasswordPreferenceTest.java

@@ -71,10 +71,12 @@ public class AudioSharingPasswordPreferenceTest {
         var editText = view.findViewById(android.R.id.edit);
         var checkBox = view.findViewById(R.id.audio_sharing_stream_password_checkbox);
         var dialogMessage = view.findViewById(android.R.id.message);
+        var editTextAlertMessage = view.findViewById(R.id.edit_alert_message);
 
         assertThat(editText).isNotNull();
         assertThat(checkBox).isNotNull();
         assertThat(dialogMessage).isNotNull();
+        assertThat(editTextAlertMessage).isNotNull();
     }
 
     @Test
@@ -147,6 +149,34 @@ public class AudioSharingPasswordPreferenceTest {
         assertThat(checkBox.isChecked()).isFalse();
     }
 
+    @Test
+    public void showEditTextFormatAlert_show() {
+        View view =
+                LayoutInflater.from(mContext).inflate(R.layout.audio_sharing_password_dialog, null);
+        mPreference.onBindDialogView(view);
+
+        var editTextAlertMessage = view.findViewById(R.id.edit_alert_message);
+
+        mPreference.showEditTextFormatAlert(true);
+
+        assertThat(editTextAlertMessage).isNotNull();
+        assertThat(editTextAlertMessage.getVisibility()).isEqualTo(VISIBLE);
+    }
+
+    @Test
+    public void showEditTextFormatAlert_hide() {
+        View view =
+                LayoutInflater.from(mContext).inflate(R.layout.audio_sharing_password_dialog, null);
+        mPreference.onBindDialogView(view);
+
+        var editTextAlertMessage = view.findViewById(R.id.edit_alert_message);
+
+        mPreference.showEditTextFormatAlert(false);
+
+        assertThat(editTextAlertMessage).isNotNull();
+        assertThat(editTextAlertMessage.getVisibility()).isEqualTo(GONE);
+    }
+
     @Test
     public void onDialogEventListener_onClick_positiveButton() {
         AudioSharingPasswordPreference.OnDialogEventListener listener =