Disabled state UI of Flash Notifications preview button
When both the camera flash and screen flash toggles are turned off, tapping on the preview button will have no effect and may confuse users. To avoid this, the appearance of the preview button should be updated to clearly indicated that its current state is disabled. This wil help users better understand the situation and prevent confusion. Bug: 276494146 Test: checks the UI manually Test: make RunSettingsRoboTests ROBOTEST_FILTER=FlashNotificationsPreviewPreferenceTest Change-Id: I55b11188fde6e551921a9b0f7c89daa20a8b766b
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@@ -17,16 +17,26 @@
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package com.android.settings.accessibility;
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import android.content.Context;
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import android.graphics.drawable.Drawable;
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import android.util.AttributeSet;
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import android.view.View;
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import android.widget.TextView;
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import androidx.annotation.ColorInt;
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import androidx.preference.Preference;
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import androidx.preference.PreferenceViewHolder;
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import com.android.settings.R;
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import com.android.settingslib.Utils;
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/**
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* Preference for Flash notifications preview.
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*/
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public class FlashNotificationsPreviewPreference extends Preference {
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private Drawable mBackgroundEnabled;
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private Drawable mBackgroundDisabled;
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@ColorInt
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private int mTextColorDisabled;
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public FlashNotificationsPreviewPreference(Context context) {
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super(context);
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@@ -52,5 +62,32 @@ public class FlashNotificationsPreviewPreference extends Preference {
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private void init() {
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setLayoutResource(R.layout.flash_notification_preview_preference);
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mBackgroundEnabled = getContext().getDrawable(R.drawable.settingslib_switch_bar_bg_on);
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mBackgroundDisabled = getContext().getDrawable(R.drawable.switch_bar_bg_disabled);
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mTextColorDisabled = Utils.getColorAttrDefaultColor(getContext(),
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android.R.attr.textColorPrimary);
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}
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@Override
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public void onBindViewHolder(PreferenceViewHolder holder) {
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super.onBindViewHolder(holder);
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final boolean enabled = isEnabled();
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final View frame = holder.findViewById(R.id.frame);
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if (frame != null) {
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frame.setBackground(enabled ? mBackgroundEnabled : mBackgroundDisabled);
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}
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final TextView title = (TextView) holder.findViewById(android.R.id.title);
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if (title != null) {
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@ColorInt final int textColorEnabled = title.getCurrentTextColor();
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title.setAlpha(enabled ? 1f : 0.38f);
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title.setTextColor(enabled ? textColorEnabled : mTextColorDisabled);
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}
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}
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@Override
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public void setEnabled(boolean enabled) {
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super.setEnabled(enabled);
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notifyChanged();
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}
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}
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