Add content description to bar chart icons.

Allow setting a content description on the bar chart icons so screen
readers can speak information about them.

Bug: 127237805
Test: Use new API.
Test: atest the two modified tests
Change-Id: I97c3693459bd1d916a66d834434be6ef3ab405d7

packages/SettingsLib/BarChartPreference/src/com/android/settingslib/widget/BarView.java

@@ -74,6 +74,7 @@ public class BarView extends LinearLayout {
         // For now, we use the bar number as title.
         mBarTitle.setText(Integer.toString(barViewInfo.getHeight()));
         mBarSummary.setText(barViewInfo.getSummary());
+        mIcon.setContentDescription(barViewInfo.getContentDescription());
     }
 
     @VisibleForTesting

packages/SettingsLib/BarChartPreference/src/com/android/settingslib/widget/BarViewInfo.java

@@ -34,6 +34,7 @@ public class BarViewInfo implements Comparable<BarViewInfo> {
     private View.OnClickListener mClickListener;
     @StringRes
     private int mSummary;
+    private @Nullable CharSequence mContentDescription;
     // A number indicates this bar's height. The larger number shows a higher bar view.
     private int mHeight;
     // A real height of bar view.
@@ -45,11 +46,14 @@ public class BarViewInfo implements Comparable<BarViewInfo> {
      * @param icon      The icon of bar view.
      * @param barHeight The height of bar view. Larger number shows a higher bar view.
      * @param summary   The string resource id for summary.
+     * @param contentDescription Optional text that briefly describes the contents of the icon.
      */
-    public BarViewInfo(Drawable icon, @IntRange(from = 0) int barHeight, @StringRes int summary) {
+    public BarViewInfo(Drawable icon, @IntRange(from = 0) int barHeight, @StringRes int summary,
+            @Nullable CharSequence contentDescription) {
         mIcon = icon;
         mHeight = barHeight;
         mSummary = summary;
+        mContentDescription = contentDescription;
     }
 
     /**
@@ -91,6 +95,10 @@ public class BarViewInfo implements Comparable<BarViewInfo> {
         return mSummary;
     }
 
+    public @Nullable CharSequence getContentDescription() {
+        return mContentDescription;
+    }
+
     void setNormalizedHeight(@IntRange(from = 0) int barHeight) {
         mNormalizedHeight = barHeight;
     }

packages/SettingsLib/tests/robotests/src/com/android/settingslib/widget/BarChartInfoTest.java

@@ -72,7 +72,8 @@ public class BarChartInfoTest {
         final BarViewInfo barViewInfo = new BarViewInfo(
                 null /* icon */,
                 50,
-                mTitle);
+                mTitle,
+                null);
 
         final BarChartInfo mBarChartInfo = new BarChartInfo.Builder()
                 .setTitle(mTitle)
@@ -91,7 +92,8 @@ public class BarChartInfoTest {
         final BarViewInfo barViewInfo = new BarViewInfo(
                 null /* icon */,
                 50,
-                mTitle);
+                mTitle,
+                null);
         final BarChartInfo mBarChartInfo = new BarChartInfo.Builder()
                 .setTitle(mTitle)
                 .setDetails(mDetails)
@@ -113,7 +115,8 @@ public class BarChartInfoTest {
         final BarViewInfo barViewInfo = new BarViewInfo(
                 null /* icon */,
                 50,
-                mTitle);
+                mTitle,
+                null);
         new BarChartInfo.Builder()
                 .setTitle(mTitle)
                 .setDetails(mDetails)

packages/SettingsLib/tests/robotests/src/com/android/settingslib/widget/BarChartPreferenceTest.java

@@ -113,7 +113,8 @@ public class BarChartPreferenceTest {
         final BarChartInfo barChartInfo = new BarChartInfo.Builder()
                 .setTitle(R.string.debug_app)
                 .setDetails(R.string.debug_app)
-                .addBarViewInfo(new BarViewInfo(mIcon, 10 /* barNumber */, R.string.debug_app))
+                .addBarViewInfo(
+                        new BarViewInfo(mIcon, 10 /* barNumber */, R.string.debug_app, null))
                 .build();
 
         mPreference.initializeBarChart(barChartInfo);
@@ -128,7 +129,8 @@ public class BarChartPreferenceTest {
         // We don't call BarChartInfo.Builder#setDetails yet.
         final BarChartInfo barChartInfo = new BarChartInfo.Builder()
                 .setTitle(R.string.debug_app)
-                .addBarViewInfo(new BarViewInfo(mIcon, 10 /* barNumber */, R.string.debug_app))
+                .addBarViewInfo(
+                        new BarViewInfo(mIcon, 10 /* barNumber */, R.string.debug_app, null))
                 .build();
 
         mPreference.initializeBarChart(barChartInfo);
@@ -144,7 +146,8 @@ public class BarChartPreferenceTest {
                 .setDetails(R.string.debug_app)
                 .setDetailsOnClickListener(v -> {
                 })
-                .addBarViewInfo(new BarViewInfo(mIcon, 10 /* barNumber */, R.string.debug_app))
+                .addBarViewInfo(
+                        new BarViewInfo(mIcon, 10 /* barNumber */, R.string.debug_app, null))
                 .build();
 
         mPreference.initializeBarChart(barChartInfo);
@@ -157,7 +160,7 @@ public class BarChartPreferenceTest {
     @Test
     public void setBarViewInfos_oneBarViewInfoSet_shouldShowOneBarView() {
         final BarViewInfo[] barViewsInfo = new BarViewInfo[]{
-                new BarViewInfo(mIcon, 10 /* barNumber */, R.string.debug_app)
+                new BarViewInfo(mIcon, 10 /* barNumber */, R.string.debug_app, null)
         };
 
         mPreference.initializeBarChart(mBarChartInfo);
@@ -175,8 +178,8 @@ public class BarChartPreferenceTest {
     @Test
     public void setBarViewInfos_twoBarViewInfosSet_shouldShowTwoBarViews() {
         final BarViewInfo[] barViewsInfo = new BarViewInfo[]{
-                new BarViewInfo(mIcon, 20 /* barNumber */, R.string.debug_app),
-                new BarViewInfo(mIcon, 10 /* barNumber */, R.string.debug_app)
+                new BarViewInfo(mIcon, 20 /* barNumber */, R.string.debug_app, null),
+                new BarViewInfo(mIcon, 10 /* barNumber */, R.string.debug_app, null)
         };
 
         mPreference.initializeBarChart(mBarChartInfo);
@@ -195,9 +198,9 @@ public class BarChartPreferenceTest {
     @Test
     public void setBarViewInfos_threeBarViewInfosSet_shouldShowThreeBarViews() {
         final BarViewInfo[] barViewsInfo = new BarViewInfo[]{
-                new BarViewInfo(mIcon, 20 /* barNumber */, R.string.debug_app),
-                new BarViewInfo(mIcon, 10 /* barNumber */, R.string.debug_app),
-                new BarViewInfo(mIcon, 5 /* barNumber */, R.string.debug_app)
+                new BarViewInfo(mIcon, 20 /* barNumber */, R.string.debug_app, null),
+                new BarViewInfo(mIcon, 10 /* barNumber */, R.string.debug_app, null),
+                new BarViewInfo(mIcon, 5 /* barNumber */, R.string.debug_app, null)
         };
 
         mPreference.initializeBarChart(mBarChartInfo);
@@ -217,10 +220,10 @@ public class BarChartPreferenceTest {
     @Test
     public void setBarViewInfos_fourBarViewInfosSet_shouldShowFourBarViews() {
         final BarViewInfo[] barViewsInfo = new BarViewInfo[]{
-                new BarViewInfo(mIcon, 20 /* barNumber */, R.string.debug_app),
-                new BarViewInfo(mIcon, 10 /* barNumber */, R.string.debug_app),
-                new BarViewInfo(mIcon, 5 /* barNumber */, R.string.debug_app),
-                new BarViewInfo(mIcon, 2 /* barNumber */, R.string.debug_app),
+                new BarViewInfo(mIcon, 20 /* barNumber */, R.string.debug_app, null),
+                new BarViewInfo(mIcon, 10 /* barNumber */, R.string.debug_app, null),
+                new BarViewInfo(mIcon, 5 /* barNumber */, R.string.debug_app, null),
+                new BarViewInfo(mIcon, 2 /* barNumber */, R.string.debug_app, null),
         };
 
         mPreference.initializeBarChart(mBarChartInfo);
@@ -242,11 +245,11 @@ public class BarChartPreferenceTest {
         thrown.expect(IllegalStateException.class);
 
         final BarViewInfo[] barViewsInfo = new BarViewInfo[]{
-                new BarViewInfo(mIcon, 30 /* barNumber */, R.string.debug_app),
-                new BarViewInfo(mIcon, 50 /* barNumber */, R.string.debug_app),
-                new BarViewInfo(mIcon, 5 /* barNumber */, R.string.debug_app),
-                new BarViewInfo(mIcon, 10 /* barNumber */, R.string.debug_app),
-                new BarViewInfo(mIcon, 70 /* barNumber */, R.string.debug_app),
+                new BarViewInfo(mIcon, 30 /* barNumber */, R.string.debug_app, null),
+                new BarViewInfo(mIcon, 50 /* barNumber */, R.string.debug_app, null),
+                new BarViewInfo(mIcon, 5 /* barNumber */, R.string.debug_app, null),
+                new BarViewInfo(mIcon, 10 /* barNumber */, R.string.debug_app, null),
+                new BarViewInfo(mIcon, 70 /* barNumber */, R.string.debug_app, null),
         };
 
         mPreference.setBarViewInfos(barViewsInfo);
@@ -255,10 +258,10 @@ public class BarChartPreferenceTest {
     @Test
     public void setBarViewInfos_barViewInfosSet_shouldBeSortedInDescending() {
         final BarViewInfo[] barViewsInfo = new BarViewInfo[]{
-                new BarViewInfo(mIcon, 30 /* barNumber */, R.string.debug_app),
-                new BarViewInfo(mIcon, 50 /* barNumber */, R.string.debug_app),
-                new BarViewInfo(mIcon, 5 /* barNumber */, R.string.debug_app),
-                new BarViewInfo(mIcon, 10 /* barNumber */, R.string.debug_app),
+                new BarViewInfo(mIcon, 30 /* barNumber */, R.string.debug_app, null),
+                new BarViewInfo(mIcon, 50 /* barNumber */, R.string.debug_app, null),
+                new BarViewInfo(mIcon, 5 /* barNumber */, R.string.debug_app, null),
+                new BarViewInfo(mIcon, 10 /* barNumber */, R.string.debug_app, null),
         };
 
         mPreference.initializeBarChart(mBarChartInfo);
@@ -278,7 +281,7 @@ public class BarChartPreferenceTest {
     @Test
     public void setBarViewInfos_validBarViewSummarySet_barViewShouldShowSummary() {
         final BarViewInfo[] barViewsInfo = new BarViewInfo[]{
-                new BarViewInfo(mIcon, 10 /* barNumber */, R.string.debug_app),
+                new BarViewInfo(mIcon, 10 /* barNumber */, R.string.debug_app, null),
         };
 
         mPreference.initializeBarChart(mBarChartInfo);
@@ -291,7 +294,8 @@ public class BarChartPreferenceTest {
 
     @Test
     public void setBarViewInfos_clickListenerForBarViewSet_barViewShouldHaveClickListener() {
-        final BarViewInfo viewInfo = new BarViewInfo(mIcon, 30 /* barNumber */, R.string.debug_app);
+        final BarViewInfo viewInfo = new BarViewInfo(mIcon, 30 /* barNumber */, R.string.debug_app,
+                null);
         viewInfo.setClickListener(v -> {
         });
         final BarViewInfo[] barViewsInfo = new BarViewInfo[]{viewInfo};
@@ -306,7 +310,8 @@ public class BarChartPreferenceTest {
 
     @Test
     public void onBindViewHolder_loadingStateIsTrue_shouldHideAllViews() {
-        final BarViewInfo viewInfo = new BarViewInfo(mIcon, 30 /* barNumber */, R.string.debug_app);
+        final BarViewInfo viewInfo = new BarViewInfo(mIcon, 30 /* barNumber */, R.string.debug_app,
+                null);
         viewInfo.setClickListener(v -> {
         });
         final BarViewInfo[] barViewsInfo = new BarViewInfo[]{viewInfo};
@@ -322,7 +327,8 @@ public class BarChartPreferenceTest {
 
     @Test
     public void onBindViewHolder_loadingStateIsFalse_shouldInitAnyView() {
-        final BarViewInfo viewInfo = new BarViewInfo(mIcon, 30 /* barNumber */, R.string.debug_app);
+        final BarViewInfo viewInfo = new BarViewInfo(mIcon, 30 /* barNumber */, R.string.debug_app,
+                null);
         viewInfo.setClickListener(v -> {
         });
         final BarViewInfo[] barViewsInfo = new BarViewInfo[]{viewInfo};