Remove unnecessary notify in BT preference

notifyHierarchyChanged() is used before when we have
connected/disconnect deivce in same list. So only use it in
DevicePickerFragment.java, not other normal fragments.

Also that call will rebuild whole preference list, which is heavy.

Bug: 119479725
Test: Manual
Change-Id: I06cf221588001b38634fec9f02dee8bc1e561ea8

src/com/android/settings/bluetooth/BluetoothDevicePreference.java

@@ -31,6 +31,7 @@ import android.util.Pair;
 import android.util.TypedValue;
 import android.widget.ImageView;
 
+import androidx.annotation.VisibleForTesting;
 import androidx.appcompat.app.AlertDialog;
 import androidx.preference.Preference;
 import androidx.preference.PreferenceViewHolder;
@@ -58,6 +59,8 @@ public final class BluetoothDevicePreference extends GearPreference implements
     private AlertDialog mDisconnectDialog;
     private String contentDescription = null;
     private boolean mHideSecondTarget = false;
+    @VisibleForTesting
+    boolean mNeedNotifyHierarchyChanged = false;
     /* Talk-back descriptions for various BT icons */
     Resources mResources;
 
@@ -80,8 +83,8 @@ public final class BluetoothDevicePreference extends GearPreference implements
         onDeviceAttributesChanged();
     }
 
-    void rebind() {
-        notifyChanged();
+    public void setNeedNotifyHierarchyChanged(boolean needNotifyHierarchyChanged) {
+        mNeedNotifyHierarchyChanged = needNotifyHierarchyChanged;
     }
 
     @Override
@@ -144,7 +147,9 @@ public final class BluetoothDevicePreference extends GearPreference implements
         setVisible(mShowDevicesWithoutNames || mCachedDevice.hasHumanReadableName());
 
         // This could affect ordering, so notify that
-        notifyHierarchyChanged();
+        if (mNeedNotifyHierarchyChanged) {
+            notifyHierarchyChanged();
+        }
     }
 
     @Override

src/com/android/settings/bluetooth/DeviceListPreferenceFragment.java

@@ -36,6 +36,7 @@ import com.android.settingslib.bluetooth.CachedBluetoothDevice;
 import com.android.settingslib.bluetooth.LocalBluetoothManager;
 
 import java.util.Collection;
+import java.util.HashMap;
 import java.util.WeakHashMap;
 
 /**
@@ -69,8 +70,8 @@ public abstract class DeviceListPreferenceFragment extends
     @VisibleForTesting
     PreferenceGroup mDeviceListGroup;
 
-    final WeakHashMap<CachedBluetoothDevice, BluetoothDevicePreference> mDevicePreferenceMap =
-            new WeakHashMap<CachedBluetoothDevice, BluetoothDevicePreference>();
+    final HashMap<CachedBluetoothDevice, BluetoothDevicePreference> mDevicePreferenceMap =
+            new HashMap<>();
 
     boolean mShowDevicesWithoutNames;
 
@@ -195,17 +196,13 @@ public abstract class DeviceListPreferenceFragment extends
             //Set hideSecondTarget is true if it's bonded device.
             preference.hideSecondTarget(true);
             mDeviceListGroup.addPreference(preference);
-        } else {
-            // Tell the preference it is being re-used in case there is new info in the
-            // cached device.
-            preference.rebind();
         }
 
         initDevicePreference(preference);
         mDevicePreferenceMap.put(cachedDevice, preference);
     }
 
-    void initDevicePreference(BluetoothDevicePreference preference) {
+    protected void initDevicePreference(BluetoothDevicePreference preference) {
         // Does nothing by default
     }
 

src/com/android/settings/bluetooth/DevicePickerFragment.java

@@ -151,6 +151,12 @@ public final class DevicePickerFragment extends DeviceListPreferenceFragment {
         }
     }
 
+    @Override
+    protected void initDevicePreference(BluetoothDevicePreference preference) {
+        super.initDevicePreference(preference);
+        preference.setNeedNotifyHierarchyChanged(true);
+    }
+
     @Override
     public void onBluetoothStateChanged(int bluetoothState) {
         super.onBluetoothStateChanged(bluetoothState);

tests/robotests/src/com/android/settings/bluetooth/BluetoothDevicePreferenceTest.java

@@ -166,7 +166,7 @@ public class BluetoothDevicePreferenceTest {
     }
 
     @Test
-    public void testVisible_showDeviceWithoutNames_visible() {
+    public void isVisible_showDeviceWithoutNames_visible() {
         doReturn(false).when(mCachedBluetoothDevice).hasHumanReadableName();
         BluetoothDevicePreference preference =
                 new BluetoothDevicePreference(mContext, mCachedBluetoothDevice,
@@ -176,11 +176,18 @@ public class BluetoothDevicePreferenceTest {
     }
 
     @Test
-    public void testVisible_hideDeviceWithoutNames_invisible() {
+    public void isVisible_hideDeviceWithoutNames_invisible() {
         doReturn(false).when(mCachedBluetoothDevice).hasHumanReadableName();
         BluetoothDevicePreference preference =
                 new BluetoothDevicePreference(mContext, mCachedBluetoothDevice, false);
 
         assertThat(preference.isVisible()).isFalse();
     }
+
+    @Test
+    public void setNeedNotifyHierarchyChanged_updateValue() {
+        mPreference.setNeedNotifyHierarchyChanged(true);
+
+        assertThat(mPreference.mNeedNotifyHierarchyChanged).isTrue();
+    }
 }