Add @react-native-community/[picker|slider]

android/expoview/src/main/java/versioned/host/exp/exponent/ExponentPackage.java

@@ -49,6 +49,8 @@
 import versioned.host.exp.exponent.modules.api.cognito.RNAWSCognitoModule;
 import versioned.host.exp.exponent.modules.api.components.datetimepicker.RNDateTimePickerPackage;
 import versioned.host.exp.exponent.modules.api.components.maskedview.RNCMaskedViewPackage;
+import versioned.host.exp.exponent.modules.api.components.picker.RNCPickerPackage;
+import versioned.host.exp.exponent.modules.api.components.slider.ReactSliderPackage;
 import versioned.host.exp.exponent.modules.api.components.gesturehandler.react.RNGestureHandlerModule;
 import versioned.host.exp.exponent.modules.api.components.gesturehandler.react.RNGestureHandlerPackage;
 import versioned.host.exp.exponent.modules.api.components.lottie.LottiePackage;
@@ -251,6 +253,8 @@ public List<ViewManager> createViewManagers(ReactApplicationContext reactContext
         new RNSharedElementPackage(),
         new RNDateTimePickerPackage(),
         new RNCMaskedViewPackage(),
+        new RNCPickerPackage(),
+        new ReactSliderPackage(),
         new RNCViewPagerPackage(),
         new ExpoAppearancePackage()
     ));

android/expoview/src/main/java/versioned/host/exp/exponent/modules/api/components/picker/PickerItemSelectEvent.java

@@ -0,0 +1,40 @@
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
+package versioned.host.exp.exponent.modules.api.components.picker;
+
+import com.facebook.react.bridge.Arguments;
+import com.facebook.react.bridge.WritableMap;
+import com.facebook.react.uimanager.events.Event;
+import com.facebook.react.uimanager.events.RCTEventEmitter;
+
+public class PickerItemSelectEvent extends Event<PickerItemSelectEvent> {
+  public static final String EVENT_NAME = "topSelect";
+
+  private final int mPosition;
+
+  public PickerItemSelectEvent(int id, int position) {
+    super(id);
+    mPosition = position;
+  }
+
+  @Override
+  public String getEventName() {
+    return EVENT_NAME;
+  }
+
+  @Override
+  public void dispatch(RCTEventEmitter rctEventEmitter) {
+    rctEventEmitter.receiveEvent(getViewTag(), getEventName(), serializeEventData());
+  }
+
+  private WritableMap serializeEventData() {
+    WritableMap eventData = Arguments.createMap();
+    eventData.putInt("position", mPosition);
+    return eventData;
+  }
+}

android/expoview/src/main/java/versioned/host/exp/exponent/modules/api/components/picker/RNCPickerPackage.java

@@ -0,0 +1,32 @@
+
+package versioned.host.exp.exponent.modules.api.components.picker;
+
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.Collections;
+import java.util.List;
+
+import com.facebook.react.ReactPackage;
+import com.facebook.react.bridge.NativeModule;
+import com.facebook.react.bridge.ReactApplicationContext;
+import com.facebook.react.uimanager.ViewManager;
+import com.facebook.react.bridge.JavaScriptModule;
+public class RNCPickerPackage implements ReactPackage {
+    @Override
+    public List<NativeModule> createNativeModules(ReactApplicationContext reactContext) {
+      return Collections.emptyList();
+    }
+
+    // Deprecated from RN 0.47
+    public List<Class<? extends JavaScriptModule>> createJSModules() {
+      return Collections.emptyList();
+    }
+
+    @Override
+    public List<ViewManager> createViewManagers(ReactApplicationContext reactContext) {
+        List<ViewManager> list = new ArrayList<>();
+        list.add(new ReactDialogPickerManager());
+        list.add(new ReactDropdownPickerManager());
+      return list;
+    }
+}

android/expoview/src/main/java/versioned/host/exp/exponent/modules/api/components/picker/ReactDialogPickerManager.java

@@ -0,0 +1,33 @@
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
+package versioned.host.exp.exponent.modules.api.components.picker;
+
+import android.widget.Spinner;
+
+import com.facebook.react.module.annotations.ReactModule;
+import com.facebook.react.uimanager.ThemedReactContext;
+
+
+/**
+ * {@link ReactPickerManager} for {@link ReactPicker} with {@link Spinner#MODE_DIALOG}.
+ */
+@ReactModule(name = ReactDialogPickerManager.REACT_CLASS)
+public class ReactDialogPickerManager extends ReactPickerManager {
+
+  public static final String REACT_CLASS = "AndroidDialogPicker";
+
+  @Override
+  public String getName() {
+    return REACT_CLASS;
+  }
+
+  @Override
+  protected ReactPicker createViewInstance(ThemedReactContext reactContext) {
+    return new ReactPicker(reactContext, Spinner.MODE_DIALOG);
+  }
+}

android/expoview/src/main/java/versioned/host/exp/exponent/modules/api/components/picker/ReactDropdownPickerManager.java

@@ -0,0 +1,32 @@
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
+package versioned.host.exp.exponent.modules.api.components.picker;
+
+import android.widget.Spinner;
+
+import com.facebook.react.module.annotations.ReactModule;
+import com.facebook.react.uimanager.ThemedReactContext;
+
+/**
+ * {@link ReactPickerManager} for {@link ReactPicker} with {@link Spinner#MODE_DROPDOWN}.
+ */
+@ReactModule(name = ReactDropdownPickerManager.REACT_CLASS)
+public class ReactDropdownPickerManager extends ReactPickerManager {
+
+  public static final String REACT_CLASS = "AndroidDropdownPicker";
+
+  @Override
+  public String getName() {
+    return REACT_CLASS;
+  }
+
+  @Override
+  protected ReactPicker createViewInstance(ThemedReactContext reactContext) {
+    return new ReactPicker(reactContext, Spinner.MODE_DROPDOWN);
+  }
+}

android/expoview/src/main/java/versioned/host/exp/exponent/modules/api/components/picker/ReactPicker.java

@@ -0,0 +1,155 @@
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
+package versioned.host.exp.exponent.modules.api.components.picker;
+
+import android.content.Context;
+import androidx.appcompat.widget.AppCompatSpinner;
+import android.util.AttributeSet;
+import android.view.View;
+import android.widget.AdapterView;
+import android.widget.Spinner;
+
+import com.facebook.react.common.annotations.VisibleForTesting;
+
+import javax.annotation.Nullable;
+
+public class ReactPicker extends AppCompatSpinner {
+
+  private int mMode = Spinner.MODE_DIALOG;
+  private @Nullable Integer mPrimaryColor;
+  private @Nullable OnSelectListener mOnSelectListener;
+  private @Nullable Integer mStagedSelection;
+
+  private final OnItemSelectedListener mItemSelectedListener = new OnItemSelectedListener() {
+    @Override
+    public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
+      if (mOnSelectListener != null) {
+        mOnSelectListener.onItemSelected(position);
+      }
+    }
+
+    @Override
+    public void onNothingSelected(AdapterView<?> parent) {
+      if (mOnSelectListener != null) {
+        mOnSelectListener.onItemSelected(-1);
+      }
+    }
+  };
+
+  /**
+   * Listener interface for ReactPicker events.
+   */
+  public interface OnSelectListener {
+    void onItemSelected(int position);
+  }
+
+  public ReactPicker(Context context) {
+    super(context);
+  }
+
+  public ReactPicker(Context context, int mode) {
+    super(context, mode);
+    mMode = mode;
+  }
+
+  public ReactPicker(Context context, AttributeSet attrs) {
+    super(context, attrs);
+  }
+
+  public ReactPicker(Context context, AttributeSet attrs, int defStyle) {
+    super(context, attrs, defStyle);
+  }
+
+  public ReactPicker(Context context, AttributeSet attrs, int defStyle, int mode) {
+    super(context, attrs, defStyle, mode);
+    mMode = mode;
+  }
+
+  private final Runnable measureAndLayout = new Runnable() {
+    @Override
+    public void run() {
+      measure(
+          MeasureSpec.makeMeasureSpec(getWidth(), MeasureSpec.EXACTLY),
+          MeasureSpec.makeMeasureSpec(getHeight(), MeasureSpec.EXACTLY));
+      layout(getLeft(), getTop(), getRight(), getBottom());
+    }
+  };
+
+  @Override
+  public void requestLayout() {
+    super.requestLayout();
+
+    // The spinner relies on a measure + layout pass happening after it calls requestLayout().
+    // Without this, the widget never actually changes the selection and doesn't call the
+    // appropriate listeners. Since we override onLayout in our ViewGroups, a layout pass never
+    // happens after a call to requestLayout, so we simulate one here.
+    post(measureAndLayout);
+  }
+
+  @Override
+  protected void onLayout(boolean changed, int left, int top, int right, int bottom) {
+    super.onLayout(changed, left, top, right, bottom);
+
+    // onItemSelected gets fired immediately after layout because checkSelectionChanged() in
+    // AdapterView updates the selection position from the default INVALID_POSITION.
+    // To match iOS behavior, which no onItemSelected during initial layout.
+    // We setup the listener after layout.
+    if (getOnItemSelectedListener() == null)
+      setOnItemSelectedListener(mItemSelectedListener);
+  }
+
+  public void setOnSelectListener(@Nullable OnSelectListener onSelectListener) {
+    mOnSelectListener = onSelectListener;
+  }
+
+  @Nullable public OnSelectListener getOnSelectListener() {
+    return mOnSelectListener;
+  }
+
+  /**
+   * Will cache "selection" value locally and set it only once {@link #updateStagedSelection} is
+   * called
+   */
+  public void setStagedSelection(int selection) {
+    mStagedSelection = selection;
+  }
+
+  public void updateStagedSelection() {
+    if (mStagedSelection != null) {
+      setSelectionWithSuppressEvent(mStagedSelection);
+      mStagedSelection = null;
+    }
+  }
+
+  /**
+   * Set the selection while suppressing the follow-up {@link OnSelectListener#onItemSelected(int)}
+   * event. This is used so we don't get an event when changing the selection ourselves.
+   *
+   * @param position the position of the selected item
+   */
+  private void setSelectionWithSuppressEvent(int position) {
+    if (position != getSelectedItemPosition()) {
+      setOnItemSelectedListener(null);
+      setSelection(position, false);
+      setOnItemSelectedListener(mItemSelectedListener);
+    }
+  }
+
+  public @Nullable Integer getPrimaryColor() {
+    return mPrimaryColor;
+  }
+
+  public void setPrimaryColor(@Nullable Integer primaryColor) {
+    mPrimaryColor = primaryColor;
+  }
+
+  @VisibleForTesting
+  public int getMode() {
+    return mMode;
+  }
+}