android - 新的 Google 地方信息自动填充功能在点击时崩溃

Question

我使用了谷歌地方的新依赖。单击自动完成 View 时应用程序崩溃。错误如下。,

java.lang.NullPointerException: Place Fields must be set.
    at com.google.common.base.Preconditions.checkNotNull(Preconditions.java:889)
    at com.google.android.libraries.places.internal.dt.onClick(Unknown Source)
    at android.view.View.performClick(View.java:6207)
    at android.widget.TextView.performClick(TextView.java:11094)
    at android.view.View$PerformClick.run(View.java:23639)
    at android.os.Handler.handleCallback(Handler.java:751)
    at android.os.Handler.dispatchMessage(Handler.java:95)
    at android.os.Looper.loop(Looper.java:154)
    at android.app.ActivityThread.main(ActivityThread.java:6688)
    at java.lang.reflect.Method.invoke(Native Method)
    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1468)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1358)

启动方法。我在 Fragment 中使用了它，所以我用 getFragmentManager() 来初始化 Fragment。

private void setUpLocationPicker(){

    if (!Places.isInitialized()) {
        Places.initialize(this.getActivity(), getString(R.string.google_maps_key));
    }

    // Initialize the AutocompleteSupportFragment.
    AutocompleteSupportFragment autocompleteFragment = (AutocompleteSupportFragment)
            getFragmentManager().findFragmentById(R.id.autocomplete_fragment);

    autocompleteFragment.setPlaceFields(Arrays.asList(Place.Field.ID, Place.Field.NAME));

    autocompleteFragment.setOnPlaceSelectedListener(new PlaceSelectionListener() {
        @Override
        public void onPlaceSelected(Place place) {
            // TODO: Get info about the selected place.
            Log.i(TAG, "Place: " + place.getName() + ", " + place.getId());
        }

        @Override
        public void onError(Status status) {
            // TODO: Handle the error.
            Log.i(TAG, "An error occurred: " + status);
        }
    });
}

和 XML 布局。

<android.support.constraint.ConstraintLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent">
        <fragment
            android:id="@+id/autocomplete_fragment"
            android:name="com.google.android.libraries.places.widget.AutocompleteSupportFragment"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_marginStart="8dp"
            android:layout_marginEnd="8dp"
            android:layout_marginBottom="8dp"
            app:layout_constraintBottom_toBottomOf="parent"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toBottomOf="@+id/pickup_address" />

    </android.support.constraint.ConstraintLayout>

为什么自动完成 View 在 Onclick 事件中返回 null。如何解决这个问题？

Answer 1

我找到了这样做的方法并在此处发布答案。

   // Initialize place API
    if (!Places.isInitialized()) {
        Places.initialize(mContext, mContext.getString(R.string.google_maps_key));
    }
    PlacesClient placesClient = Places.createClient(mContext);

    // Create a new token for the autocomplete session. Pass this to FindAutocompletePredictionsRequest,
    // and once again when the user makes a selection (for example when calling fetchPlace()).
    AutocompleteSessionToken token = AutocompleteSessionToken.newInstance();

    // Specify the fields to return.
    List<Place.Field> placeFields = Arrays.asList(Place.Field.ID, Place.Field.NAME, Place.Field.LAT_LNG);

另外我从 Place Migration Guide 得到了答案.希望这会有所帮助。