【发布时间】：2016-01-09 10:01:35
【问题描述】：
我是 android dev 的新手，我正在尝试为大屏幕创建多窗格。它有 3 个片段。如果我保留 2 个片段，一切都很好。第三次审查片段有 Http 调用。问题 我面临的问题我无法在详细信息片段下方显示评论片段吗？
1.由于我是直接调用updateView方法，所有成员变量虽然在onCreateView方法中赋值，但并未初始化
2.so 我正在使用 getview() 重新分配，但是尽管适配器计数大于 0，但我没有得到屏幕。 代码在移动设备中按需要工作 activity_main.xml
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:baselineAligned="false"
android:divider="?android:attr/dividerHorizontal"
android:orientation="horizontal"
>
<!--
This layout is a two-pane layout for the Items master/detail flow.
-->
<fragment
android:id="@+id/fragment_forecast"
android:name="com.example.android.app.popularmovies.fragmetns.MovieGridFragment"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:layout_weight="2"
tools:layout="@layout/movie_grid_fragment" />
<LinearLayout
android:layout_width="wrap_content"
android:layout_weight="1"
android:layout_height="match_parent"
android:orientation="vertical"
>
<FrameLayout
android:id="@+id/movie_detail_activity"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:visibility="invisible"
/>
<FrameLayout
android:id="@+id/movie_review"
android:layout_width="match_parent"
android:layout_height="wrap_content"
/>
</LinearLayout>
</LinearLayout>
ReviewFragmenent 类
public class MovieReviewFragment extends Fragment {
private ProgressBar progressBar;
private RecyclerView mRecyclerView;
private RecyclerView.Adapter mAdapter;
private RecyclerView.LayoutManager mLayoutManager;
private List<MovieReview> movieReviewList;
private static final String LOG_TAG = MovieReviewFragment.class.getSimpleName();
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
if (savedInstanceState != null && savedInstanceState.containsKey("REVIEW_DATA")) {
movieReviewList = savedInstanceState.getParcelableArrayList("REVIEW_DATA");
} else {
movieReviewList = new ArrayList<>();
}
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.movie_review, container, false);
Intent intent = getActivity().getIntent();
if (intent != null && intent.hasExtra(PopularMovieConstants.MOVIE_DATA)) {
MovieDetails movieDetails = intent.getParcelableExtra(PopularMovieConstants.MOVIE_DATA);
// initUI(rootView);
progressBar = ((ProgressBar) rootView.findViewById(R.id.reviewProgessBar));
mRecyclerView = (RecyclerView) rootView.findViewById(R.id.MovieReviewView);
mRecyclerView.setHasFixedSize(true);
mLayoutManager = new LinearLayoutManager(getContext());
mRecyclerView.setLayoutManager(mLayoutManager);
mAdapter = new MovieReviewListAdapter(movieReviewList);
mRecyclerView.setAdapter(mAdapter);
if (mAdapter.getItemCount() == 0) {
getReview(movieDetails);
} else {
progressBar.setVisibility(View.GONE);
}
}
return rootView;
}
public void initUI(View view) {
Log.d(LOG_TAG,"start initView");
progressBar = ((ProgressBar) view.findViewById(R.id.reviewProgessBar));
mRecyclerView = (RecyclerView) view.findViewById(R.id.MovieReviewView);
mRecyclerView.setHasFixedSize(true);
mLayoutManager = new LinearLayoutManager(getContext());
mRecyclerView.setLayoutManager(mLayoutManager);
mAdapter = new MovieReviewListAdapter(movieReviewList);
mRecyclerView.setAdapter(mAdapter);
}
public void updateView(MovieDetails MovieDetails) {
//initUI(getView());
progressBar=(ProgressBar)getView().findViewById(R.id.reviewProgessBar);
mRecyclerView=(RecyclerView) getView().findViewById(R.id.MovieReviewView);
mRecyclerView.setHasFixedSize(true);
mLayoutManager = new LinearLayoutManager(getContext());
mRecyclerView.setLayoutManager(mLayoutManager);
mAdapter = new MovieReviewListAdapter(new ArrayList<MovieReview>());
mRecyclerView.setAdapter(mAdapter);
getReview(MovieDetails);
Log.d(LOG_TAG,"update View Completed");
}
public void getReview(MovieDetails MovieDetails) {
Log.d(LOG_TAG, "updateView MovieReviewFragment");
Uri builtUri = Uri.parse(PopularMovieConstants.BASE_URL)
.buildUpon()
.appendPath(PopularMovieConstants.MOVIE_APPENDER)
.appendPath(PopularMovieConstants.MOVIE_PATH)
.appendPath(Integer.toString(MovieDetails.getId()))
.appendPath(PopularMovieConstants.REVIEWS)
.appendQueryParameter(PopularMovieConstants.API_KEY_PARAM, BuildConfig.THE_MOVIE_DB_API_KEY)
.build();
Log.d(LOG_TAG, builtUri.toString());
Request request = new Request.Builder()
.url(builtUri.toString())
.build();
OkHttpClient client = new OkHttpClient();
client.newCall(request).enqueue(new Callback() {
@Override
public void onFailure(Request request, IOException throwable) {
throwable.printStackTrace();
}
@Override
public void onResponse(Response response) throws IOException {
if (!response.isSuccessful())
throw new IOException("Unexpected code " + response);
Gson gson = new Gson();
final MovieReviewsDTO reviews = gson.fromJson(response.body().charStream(), MovieReviewsDTO.class);
Log.d(LOG_TAG, "success");
getActivity().runOnUiThread(new Runnable() {
@Override
public void run() {
((MovieReviewListAdapter) mAdapter).setGridData(reviews.getResults());
Log.d(LOG_TAG, "ui" + ((MovieReviewListAdapter) mAdapter).getItemCount());
progressBar.setVisibility(View.GONE);
}
});
}
});
}
@Override
public void onSaveInstanceState(Bundle outState) {
outState.putParcelableArrayList("REVIEW_DATA"
, (ArrayList<? extends Parcelable>) ((MovieReviewListAdapter) mAdapter).getGridData());
super.onSaveInstanceState(outState);
}
}
【问题讨论】：
标签： android android-fragments tablet okhttp