在 GridLayout 中动态添加相同大小的视图

Question

我需要显示一个 4x10 的随机颜色网格。网格应水平和垂直填充屏幕，所有单元格应具有相同的尺寸。由于网格 (4x10) 的尺寸将来可能会发生变化，所以 GridLayout 对我来说比 TableLayout 更有意义。 GridView 和 RecyclerView 退出了，因为我不需要任何滚动行为。

因为我需要在运行时添加这些子视图，所以我开始计算单元格宽度和高度作为屏幕宽度和高度的比率。然后我偶然发现了this SO post，它说 GridLayout 有更好的方法来实现这种行为。有一个基于静态 (XML) 的视图的代码示例，但我找不到 Java/Kotlin 示例。我正在尝试使用 GridLayout.Spec 在子视图的 LayoutParams 中使用，但无法弄清楚它是如何工作的。

更新了所需布局的屏幕截图。此图像为 12x10，但我希望能够灵活地更改尺寸（编译时间）。

Answer 1

与 LinearLayout 类似，GridLayout 规范中有一个 weight 属性 - 您可以将所有视图设置为 1。与 LinearLayout 类似，使用权重使宽度和高度为 0。如果要按顺序绘制视图，请使用 Undefined 作为位置，否则为每个单元格传递相应的位置。

    gridLayout.rowCount = rowCount
    gridLayout.columnCount = colCount

    for (i in 1..rowCount*colCount){
        val layoutParams: GridLayout.LayoutParams = GridLayout.LayoutParams(
                GridLayout.spec(GridLayout.UNDEFINED, 1f),
                GridLayout.spec(GridLayout.UNDEFINED, 1f)).apply {
            width = 0
            height = 0
        }

        val blueView = View(this).apply {
            setBackgroundColor(Color.BLUE)
        }
        gridLayout.addView(blueView, layoutParams)
    }

Answer 2

        If you want to generate grid layout col and row dynamically you can use grid layout with recycler view. 

        1. xml code 

        <android.support.v7.widget.RecyclerView
                android:id="@+id/my_recycler_view"
                android:layout_marginTop="10dp"
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                android:scrollbars="vertical"
                />
                </android.support.v4.widget.SwipeRefreshLayout>


     2 create a model classs as per your requriement

    public class AllAssignedTableModel {

        @SerializedName("table_id")
        private int table_id;

        @SerializedName("table_name")
        private String table_name;

        @SerializedName("restaurant_id")
        private int restaurant_id;

        @SerializedName("waiter_id")
        private int waiter_id;

        @SerializedName("image")
        private String image;

        @SerializedName("table_status")
        private int table_status;

        @SerializedName("table_bill")
        private double table_bill;

        public String getImage() {
            return image;
        }

        public void setImage(String image) {
            this.image = image;
        }

        public int getTable_id() {
            return table_id;
        }

        public void setTable_id(int table_id) {
            this.table_id = table_id;
        }

        public String getTable_name() {
            return table_name;
        }

        public void setTable_name(String table_name) {
            this.table_name = table_name;
        }

        public int getRestaurant_id() {
            return restaurant_id;
        }

        public void setRestaurant_id(int restaurant_id) {
            this.restaurant_id = restaurant_id;
        }

        public int getWaiter_id() {
            return waiter_id;
        }

        public void setWaiter_id(int waiter_id) {
            this.waiter_id = waiter_id;
        }

        public int getTable_status() {
            return table_status;
        }

        public void setTable_status(int table_status) {
            this.table_status = table_status;
        }

        public double getTable_bill() {
            return table_bill;
        }

        public void setTable_bill(double table_bill) {
            this.table_bill = table_bill;
        }
    }


        3. create adapter of recycler view as per your requirement.

        package talent4assure.com.manageyourrestaurant.adapter;

        import android.content.Context;
        import android.content.SharedPreferences;
        import android.graphics.Color;
        import android.graphics.drawable.Drawable;
        import android.support.v7.widget.RecyclerView;
        import android.text.TextUtils;
        import android.view.LayoutInflater;
        import android.view.View;
        import android.view.ViewGroup;
        import android.widget.ImageView;
        import android.widget.LinearLayout;
        import android.widget.TextView;

        import com.bumptech.glide.Glide;
        import com.bumptech.glide.load.engine.DiskCacheStrategy;
        import com.google.gson.Gson;


        import java.util.HashMap;
        import java.util.List;

        import talent4assure.com.manageyourrestaurant.R;
        import talent4assure.com.manageyourrestaurant.model.AllAssignedTableModel;

        import static android.content.Context.MODE_PRIVATE;


        public class WaAssignedTableListAdapter extends RecyclerView.Adapter<WaAssignedTableListAdapter.EmployeeViewHolder> {
        private Context context;
            private List<AllAssignedTableModel> dataList;

           // public ImageView img;


            public static final String MY_BILL_PREFS = "MyBillPrefsFile";
            String tableId,billAmount;
            HashMap<String, String> billMap=new HashMap<String, String>();

            public WaAssignedTableListAdapter(List<AllAssignedTableModel> dataList, Context context) {

                this.dataList = dataList;
                this.context=context;
            }



            @Override
            public EmployeeViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
                LayoutInflater layoutInflater = LayoutInflater.from(parent.getContext());
                View view = layoutInflater.inflate(R.layout.waiter_cards_layout, parent, false);
                return new EmployeeViewHolder(view);
            }

            @Override
            public void onBindViewHolder(EmployeeViewHolder holder, int position) {
                holder.tvAssignTableName.setText(dataList.get(position).getTable_name());
                holder.tvCustomerBill.setText(String.valueOf(dataList.get(position).getTable_bill()));

                int status = dataList.get(position).getTable_status();

                if(status == 1){
                    holder.llBackground.setBackgroundResource(R.drawable.llred_background);

                }else {
                    holder.llBackground.setBackgroundResource(R.drawable.llblue_background);
                }
            }



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

            class EmployeeViewHolder extends RecyclerView.ViewHolder {

                TextView tvAssignTableName,tvCustomerBill;

                LinearLayout llBackground;


                EmployeeViewHolder(View itemView) {
                    super(itemView);
                    tvAssignTableName = (TextView) itemView.findViewById(R.id.tvAssignTableName);
                    tvCustomerBill = (TextView)itemView.findViewById(R.id.tvCustomerBill);
                    llBackground = (LinearLayout)itemView.findViewById(R.id.llBackground);

                }
            }

        }



        4. java class activity code 

         no of column u can pass statically or you can pass val dynamically as per your requirement(in this example i am taking it as 4). and no of row will get created as per your data dynamically. hope it will help you.

        private WaAssignedTableListAdapter adapter;
        private RecyclerView recyclerView;




recyclerView = (RecyclerView) findViewById(R.id.my_recycler_view);
        recyclerView.setHasFixedSize(true);
        recyclerView.setItemAnimator(new DefaultItemAnimator());        

        adapter = new WaAssignedTableListAdapter(allAssignedTableModels, WaiterActivity.this);

                                    GridLayoutManager gridLayoutManager = new GridLayoutManager(getApplicationContext(), 4, LinearLayoutManager.VERTICAL, false);
                                    recyclerView.setLayoutManager(gridLayoutManager);
                                    recyclerView.setAdapter(adapter);