Question

我有一个应用程序，我使用带有片段的幻灯片选项卡，在每个片段中我都有自定义适配器的recyclerview，我有5个选项卡现在应用程序工作正常，当我滑动时，显示正确的数据，前4个选项卡共享相同对于第五个没有的recyclerview适配器的布局，现在如果我点击第四个选项卡，应用程序崩溃它说它在调试一段时间后无法获得textview我发现布局传递到适配器和文本视图的ID不匹配，因此在这种情况下，第4个选项卡的布局将传递给适配器，但是文本视图的ID来自第5个选项卡，其中布局不同，为什么会这样？这就是片段中适配器的外观：

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
                         Bundle savedInstanceState) {
    // Inflate the layout for this fragment
    View v = inflater.inflate(R.layout.fragment_two, container, false);

    Display display = getActivity().getWindowManager().getDefaultDisplay();
    Point size = new Point();
    display.getSize(size);
    int width = size.x;
    int height = size.y;

    DisplayMetrics metrics = getResources().getDisplayMetrics();

    List<Info> mDataset = new ArrayList<Info>();

    mDataset.add(new Info("Display", Build.DISPLAY,""));
    mDataset.add(new Info("Width", width+" px",""));
    mDataset.add(new Info("Height", height+" px",""));
    mDataset.add(new Info("Density", ""+metrics.density,""));

    if ( v != null ) {

        mRecyclerView = (RecyclerView) v.findViewById(R.id.my_recycler_view2);
        final LinearLayoutManager linearLayoutManager = new LinearLayoutManager(getContext());
        mRecyclerView.setLayoutManager(linearLayoutManager);
        mRecyclerView.setItemAnimator(new DefaultItemAnimator());

        mAdapter = new MyAdapter(mDataset, getContext(), "Display");
        mRecyclerView.setAdapter(mAdapter);

    }

    return v;
}

这是适配器，我在每个片段中使用相同的适配器：

public class MyAdapter extends RecyclerView.Adapter<MyAdapter.ViewHolder> {
private List<Info> mDataset;
private int mLayout;
private Context mContext;
private static int mTextInfoA;
private static int mTextInfoB;
private static int mTextInfoC;
private static String mFragment;

// Provide a suitable constructor (depends on the kind of dataset)
public MyAdapter(List<Info> mDataset, Context mContext, String mFragment) {
    this.mDataset = mDataset;
    this.mContext = mContext;
    this.mFragment = mFragment;

    if( mFragment.equals("Device") || mFragment.equals("Battery") || mFragment.equals("Display") || mFragment.equals("Ram") ) {
        this.mLayout = R.layout.cardview_layout;
        this.mTextInfoA = R.id.info_name;
        this.mTextInfoB = R.id.info_value;
    } else if( mFragment.equals("Storage") ){
        this.mLayout = R.layout.cardview_storage_layout;
        this.mTextInfoA = R.id.storage_total_value;
        this.mTextInfoB = R.id.storage_free_value;
        this.mTextInfoC = R.id.storage_textview;
    }
}

// Create new views (invoked by the layout manager)
@Override
public ViewHolder onCreateViewHolder(ViewGroup parent,
                                               int viewType) {
    // create a new view
    View v = LayoutInflater.from(parent.getContext())
            .inflate(mLayout, parent, false);

    ViewHolder vHolder = new ViewHolder(v);

    return vHolder;
}

@Override
public void onBindViewHolder(ViewHolder viewHolder, int i) {
    Info info = mDataset.get(i);
    viewHolder.mTextInfoa.setText(info.a);
    viewHolder.mTextInfob.setText(info.b);

    if (!info.c.isEmpty()) {
    if (info.c.equals("Internal Storage")) {
        viewHolder.mTextInfoc.setBackgroundColor(Color.parseColor("#2196F3"));
    } else if (info.c.equals("External Storage")) {
        viewHolder.mTextInfoc.setBackgroundColor(Color.parseColor("#F44336"));
    }
        viewHolder.mTextInfoc.setText(info.c);
}
}

@Override
public int getItemCount() {
    return mDataset.size();
}

public static class ViewHolder extends RecyclerView.ViewHolder {
    public TextView mTextInfoa;
    public TextView mTextInfob;
    public TextView mTextInfoc;

    public ViewHolder(View itemView) {
        super(itemView);

        mTextInfoa = (TextView) itemView.findViewById(mTextInfoA);
        mTextInfob = (TextView) itemView.findViewById(mTextInfoB);
        mTextInfoc = (TextView) itemView.findViewById(mTextInfoC);
    }

}

点击前三个标签即可，但是如果我在第1个标签页上，我直接点击第4个或第5个标签就会出现错误。

我的活动OnCreate方法：

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
    setSupportActionBar(toolbar);

    ViewPager viewPager = (ViewPager) findViewById(R.id.viewpager);
    setupViewPager(viewPager);

    TabLayout tabLayout = (TabLayout) findViewById(R.id.tabs);
    tabLayout.setupWithViewPager(viewPager);



    FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);
    fab.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            Snackbar.make(view, "Replace with your own action", Snackbar.LENGTH_LONG)
                    .setAction("Action", null).show();
        }
    });
}

我的主要布局：

<?xml version="1.0" encoding="utf-8"?>

<android.support.design.widget.AppBarLayout
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:theme="@style/AppTheme.AppBarOverlay">

    <android.support.v7.widget.Toolbar
        android:id="@+id/toolbar"
        android:layout_width="match_parent"
        android:layout_height="?attr/actionBarSize"
        android:background="?attr/colorPrimary"
        app:layout_scrollFlags="scroll|enterAlways"
        app:popupTheme="@style/AppTheme.PopupOverlay" />

    <android.support.design.widget.TabLayout
        android:id="@+id/tabs"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        app:tabGravity="fill"
        app:tabMode="scrollable" />

</android.support.design.widget.AppBarLayout>

<android.support.v4.view.ViewPager
    android:id="@+id/viewpager"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    app:layout_behavior="@string/appbar_scrolling_view_behavior" />

<android.support.design.widget.FloatingActionButton
    android:id="@+id/fab"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_gravity="bottom|end"
    android:layout_margin="@dimen/fab_margin"
    android:src="@android:drawable/ic_dialog_email" />

Answer 1

我自己修复过，问题是适配器中的变量是静态的。

片段中的RecyclerView与幻灯片选项卡

1 个答案: