RecyclerView 2 Columns with CardView [英] RecyclerView 2 Columns with CardView

问题描述

I have a problem with my layout. I'm trying to do something like this:

For now, i have a RecyclerView with a CardView inside it. in the CardView I have put an ImageView and a TextView but I don't know why but the CardView is more height than ImageView inside it.

Here is The code and a Sample Image.

And Here is the code: Activity

public class AddRoomActivity extends AppCompatActivity implements View.OnClickListener {

private View snackView;
private FloatingActionButton fabDoneAddRoom;
private EditText etRoomName;
private String roomName = null;
public final static String KEY_PI_IP = "MyPi_IP";
private final static String KEY_ROOM = "myRoom";
private final static String KEY_ROOM_TYPE = "myRoom_Type";

private RecyclerView typeRecyclerView;
private GridLayoutManager layoutManager;
private AddRoomActivity.TypeAdapter adapter;


private String myPi;

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

    fabDoneAddRoom = (FloatingActionButton) findViewById(R.id.doneAddRoom);
    fabDoneAddRoom.setOnClickListener(this);
    getSupportActionBar().setDisplayHomeAsUpEnabled(true);

    etRoomName = (EditText) findViewById(R.id.addRoomName);
    myPi = getIntent().getStringExtra(KEY_PI_IP);

    layoutManager = new GridLayoutManager(this, 2);


    typeRecyclerView = (RecyclerView) findViewById(R.id.recyclerTypeRoom);
    typeRecyclerView.setHasFixedSize(true);

    typeRecyclerView.setLayoutManager(layoutManager);

    // specify an adapter (see also next example)
    adapter = new TypeAdapter(getResources().getStringArray(R.array.roomTypeName));
    typeRecyclerView.setAdapter(adapter);


}


void showToastMessage(String message) {
    Snackbar.make(snackView, message, Snackbar.LENGTH_LONG).show();
}

@Override
public void onClick(View v) {
    if (v.getId() == R.id.doneAddRoom) {
        snackView = v;
        String myString = etRoomName.getText().toString();

        if (myString.length() > 0) {
            roomName = myString.substring(0, 1).toUpperCase() + myString.substring(1);
            addRoomToPi();
        } else {
            showToastMessage(getString(R.string.noNameRoom));

        }
    }
}

private void addRoomToPi() {
    Integer ret = -1;
    try {
        ret = (Integer) new RaspberryTCPClient(myPi, getResources(), RaspberryTCPClient.TYPE_ADD_ROOM, roomName, XMLRoom.TYPE_KITCHEN_ROOM).execute().get();
    } catch (InterruptedException e) {
        e.printStackTrace();
    } catch (ExecutionException e) {
        e.printStackTrace();
    }

    if (ret == RaspberryTCPClient.OPERATION_DONE) {

        showToastMessage(getString(R.string.roomAdded));

        Intent data = new Intent();
        data.putExtra(KEY_ROOM, roomName);
        setResult(Activity.RESULT_OK, data);

        final Handler handler = new Handler();
        handler.postDelayed(new Runnable() {
            @Override
            public void run() {
                finish();
            }
        }, 1500);
    } else {
        showToastMessage(getString(R.string.addRoomError));
    }

}


private class TypeAdapter extends RecyclerView.Adapter<AddRoomActivity.TypeAdapter.ViewHolder> {

    private String[] myData;


    public TypeAdapter(String[] roomList) {
        myData = roomList;
    }


    public void onItemClick(int position) {
    }

    public class ViewHolder extends RecyclerView.ViewHolder {
        // each data item is just a string in this case
        public TextView tvType;
        public CardView cvRoomCard;
        public ImageView imgRoomType;

        public ViewHolder(View vCard) {
            super(vCard);
            cvRoomCard = (CardView) vCard;
            tvType = (TextView) vCard.findViewById(R.id.tvTypeName);
            imgRoomType = (ImageView) vCard.findViewById(R.id.img_roomType);
        }
    }


    @Override
    public AddRoomActivity.TypeAdapter.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        View v = LayoutInflater.from(parent.getContext())
                .inflate(R.layout.type_room_recycler_view, parent, false);
        // set the view's size, margins, paddings and layout parameters
        //...
        AddRoomActivity.TypeAdapter.ViewHolder vh = new AddRoomActivity.TypeAdapter.ViewHolder(v);
        return vh;
    }

    @Override
    public void onBindViewHolder(AddRoomActivity.TypeAdapter.ViewHolder holder, int position) {
        // - get element from your dataset at this position
        // - replace the contents of the view with that element
        holder.tvType.setText(myData[position]);

        switch (position) {
            case XMLRoom.TYPE_ROOM:
                holder.imgRoomType.setImageResource(R.drawable.img_room_sqr);
                break;
            case XMLRoom.TYPE_BED_ROOM:
                holder.imgRoomType.setImageResource(R.drawable.img_bedroom_sqr);
                break;
            case XMLRoom.TYPE_GARDEN_ROOM:
                holder.imgRoomType.setImageResource(R.drawable.img_garden_sqr);
                break;
            case XMLRoom.TYPE_KITCHEN_ROOM:
                holder.imgRoomType.setImageResource(R.drawable.img_kitchen_sqr);
                break;
            case XMLRoom.TYPE_LIVING_ROOM:
                holder.imgRoomType.setImageResource(R.drawable.img_living_room_sqr);
                break;
            case XMLRoom.TYPE_SWIMMING_POOL_ROOM:
                holder.imgRoomType.setImageResource(R.drawable.img_swimming_pool_sqr);
                break;
        }

        holder.cvRoomCard.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                onItemClick(position);
            }
        });


    }

    @Override
    public int getItemCount() {
        return myData.length;
    }


}

The MainLayout

<android.support.design.widget.AppBarLayout
    android:id="@+id/appBar"
    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="@dimen/toolbar"
        android:background="?attr/colorPrimary"
        app:popupTheme="@style/AppTheme.PopupOverlay" />

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


<RelativeLayout
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:layout_marginBottom="90dp"
    android:layout_marginTop="@dimen/toolbar"
    android:descendantFocusability="beforeDescendants"
    android:focusableInTouchMode="true">


    <TextView
        android:id="@+id/tvAddRoom"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_alignParentTop="true"
        android:layout_margin="5dp"
        android:gravity="center"
        android:text="@string/textAddRoom"
        android:textColor="@color/primary_text"
        android:textSize="20dp"
        android:textStyle="bold" />

    <android.support.design.widget.TextInputLayout
        android:id="@+id/inputaddRoomName"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_below="@id/tvAddRoom"
        android:layout_gravity="center"
        android:layout_margin="5dp">

        <EditText
            android:id="@+id/addRoomName"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:hint="@string/prompt_RoomName"
            android:inputType="textEmailAddress"
            android:maxLines="1"
            android:singleLine="true" />

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

    <android.support.v7.widget.RecyclerView
        android:id="@+id/recyclerTypeRoom"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_below="@id/inputaddRoomName"
        android:scrollbars="vertical" />

</RelativeLayout>


<android.support.design.widget.FloatingActionButton
    android:id="@+id/doneAddRoom"
    android:layout_width="@dimen/fab_Dimension"
    android:layout_height="@dimen/fab_Dimension"
    android:layout_gravity="bottom|center"
    android:layout_margin="@dimen/fab_margin"
    app:srcCompat="@drawable/ic_done" />

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

and The View Layout:

<android.support.v7.widget.CardView xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:card_view="http://schemas.android.com/apk/res-auto"
android:id="@+id/card_view"

android:layout_width="match_parent"
android:layout_height="wrap_content"

card_view:cardCornerRadius="4dp">


<ImageView
    android:id="@+id/img_roomType"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_alignParentTop="true"
    android:src="@drawable/img_room" />

<TextView
    android:id="@+id/tvTypeName"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_gravity="bottom"
    android:gravity="center"
    android:textColor="@android:color/white"
    android:textSize="20sp" />


</android.support.v7.widget.CardView>

解决方案

Extracted required info from the accepted answer in case URL becomes invalid in future and to save time.

GridLayoutManager is used to display the RecyclerView in Grid manner instead of list.

RecyclerView.LayoutManager mLayoutManager = new GridLayoutManager(this, 2);
recyclerView.setLayoutManager(mLayoutManager);

Kotlin version:

recyclerView.apply {
   layoutManager = GridLayoutManager(this, 2)
}

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