动态创建的TableRow，然后RelativeLayout的不显示 [英] Dynamically created TableRow and then RelativeLayout not showing

问题描述

我通过查询生成 RelativeLayouts 的结果 TableRows 迭代。如果我尝试设置了的LayoutParams 为 RelativeLayout的则没有出现，并得到没有错误。如果我不这么做，一切都显得但与布局被设置为 WRAP_CONTENT 。我曾尝试几个例子并不能得到它的工作。下面是我的code：

  TableLayout tblItems =（TableLayout）findViewById（R.id.tblItems）;            //字段从数据库（凸起）
            的String [] =投影新的String [] {ItemsTable.ITEM_ID，
                                                ItemsTable.ITEM_NAME，
                                                ItemsTable.ITEM_PRICE，
                                                ItemsTable.ITEM_PICTURE};
            光标光标= getContentResolver（）查询（ItemsTable.CONTENT_URI，投影，NULL，NULL，NULL）;
            startManagingCursor（光标）;            //建立项目映射
//的String [] =列新的String [] {姓名，价格};
// INT []为= INT新[] {R.id.tv_description，R.id.tv_price};//适配器=新SimpleCursorAdapter（这一点，R.layout.item_list_select，光标，列，至，0）;
// lvSelectItems.setAdapter（适配器）;/ *
            adapter.setViewBinder（新SimpleCursorAdapter.ViewBinder（）{                公共布尔setViewValue（查看视图，光标光标，诠释参数：columnIndex）{
                    如果（参数：columnIndex == cursor.getColumnIndexOrThrow（OrderDetailTable.ORDERDETAIL_PRICE））{                  //字符串CREATEDATE = aCursor.getString（aColumnIndex）;
                  // TextView中的TextView =（TextView中）aView;
                  // textView.setText（创建日期：+ MyFormatterHelper.formatDate（getApplicationContext（），CREATEDATE））;                            双总= cursor.getDouble（参数：columnIndex）;
                            TextView中的TextView =（TextView的）视图。
                            textView.setText（$+的String.format（。％2F，dRound（总的，2）））;                            返回true;
                    }
                    返回false;
                }            }）;
* /
            // tblItems            INT totalRows = 0;
            INT tcolumn = 1;            INT numItems的= cursor.getCount（）;
            双tempRow = numItems的/ 2;            如果（numItems的大于0）{
                itemsFound =真;
            }其他{
                itemsFound = FALSE;
            }            长的iPart; //整数部分
            双fPart; //小数部分
            布尔ifFirst =真;            //获取用户输入
            的iPart =（长）tempRow;
            fPart = tempRow  - 的iPart;            如果（fPart大于0）{
                totalRows =（int）的（的iPart + 1）;
            }其他{
                totalRows =（INT）的iPart;
            }            连续的TableRow = NULL;            cursor.moveToFirst（）;
            而（cursor.isAfterLast（）== FALSE）
            {
                // // tblItems TableLayout
                //的TableRow
                //的RelativeLayout
                // ImageView的
                //的TextView
                //的TextView                如果（ifFirst）{
                    //创建一个新的TableRow
                    行=新的TableRow（本）;
                    ifFirst = FALSE;
                }                //创建一个新的RelativeLayout
                的RelativeLayout的RelativeLayout =新的RelativeLayout（本）;
                //定义RelativeLayout的布局参数。
                //在这种情况下，我想，以填补其母公司
                RelativeLayout.LayoutParams RLP =新RelativeLayout.LayoutParams（
                        RelativeLayout.LayoutParams.WRAP_CONTENT，
                        RelativeLayout.LayoutParams.WRAP_CONTENT）;                rlp.setMargins（5,5，5,5）;                relativeLayout.setPadding（5,5，5,5）;
                relativeLayout.setBackgroundResource（R.drawable.grpbx_item）;                row.addView（RelativeLayout的，RLP）;                //添加文本视图
                ImageView的imgPic =新ImageView的（本）;
                imgPic.setBackgroundResource（R.drawable.takepic）;
                imgPic.setPadding（0，0，0，0）;
                relativeLayout.addView（imgPic）;                //添加文本视图
                TextView的tvName =新的TextView（本）;
                字符串名称= cursor.getString（cursor.getColumnIndexOrThrow（ItemsTable.ITEM_NAME））;
                tvName.setText（+名称）;             //定义的TextView的布局参数
                RelativeLayout.LayoutParams LP =新RelativeLayout.LayoutParams（
                        RelativeLayout.LayoutParams.WRAP_CONTENT，
                        RelativeLayout.LayoutParams.WRAP_CONTENT）;
                lp.addRule（RelativeLayout.CENTER_IN_PARENT）;           // RelativeLayout的。                //在TextView的设置参数
                tvName.setLayoutParams（LP）;
                relativeLayout.addView（tvName）;                //添加文本视图
                双iPrice = cursor.getDouble（cursor.getColumnIndexOrThrow（ItemsTable.ITEM_PRICE））;                TextView的tvPrice =新的TextView（本）;
                tvPrice.setText（$+的String.format（％2f上。，dRound（iPrice，2）））;
                relativeLayout.addView（tvPrice）;
                tcolumn ++;                numItems--;                如果（tcolumn == 3）{
                    //将的TableRow添加到TableLayout
                    tblItems.addView（行，新TableLayout.LayoutParams（LayoutParams.WRAP_CONTENT，LayoutParams.WRAP_CONTENT））;                    //创建一个新的TableRow
                    行=新的TableRow（本）;
                    tcolumn = 1;
                }其他{
                    如果（numItems的== 0）{
                        //将的TableRow添加到TableLayout
                        tblItems.addView（行，新TableLayout.LayoutParams（LayoutParams.WRAP_CONTENT，LayoutParams.WRAP_CONTENT））;
                    }
                }                //移动到下一个记录
                cursor.moveToNext（）;
            }        }
 

解决方案

  

如果我尝试设置为RelativeLayout的布局PARAMS然后什么
  出现并没有错误。如果我不这么做，一切都显得但
  布局被设置为wrapcontent

您使用了错误的的LayoutParams 为 RelativeLayout的。您可以使用：

  RelativeLayout.LayoutParams RLP =新RelativeLayout.LayoutParams（
                        RelativeLayout.LayoutParams.WRAP_CONTENT，
                        RelativeLayout.LayoutParams.WRAP_CONTENT）;
row.addView（RelativeLayout的，RLP）;
 

但作为父 RelativeLayout的是的TableRow 您必须使用的TableRow。的LayoutParams ：

  TableRow.LayoutParams RLP =新TableRow.LayoutParams（
                        TableRow.LayoutParams.FILL_PARENT，
                        TableRow.LayoutParams.WRAP_CONTENT）;
row.addView（RelativeLayout的，RLP）;
 

I am iterating through the results of a query creating RelativeLayouts in TableRows. If I try to set the LayoutParams for the RelativeLayout then nothing appears and get no errors. If I don't then everything appears but with the layout being set to WRAP_CONTENT. I have tried several example and can not get it to work. Below is my code:

            TableLayout tblItems = (TableLayout) findViewById(R.id.tblItems);

            // Fields from the database (projection)
            String[] projection = new String[] { ItemsTable.ITEM_ID,
                                                ItemsTable.ITEM_NAME,
                                                ItemsTable.ITEM_PRICE,
                                                ItemsTable.ITEM_PICTURE };          
            Cursor cursor = getContentResolver().query(ItemsTable.CONTENT_URI, projection, null, null, null);                   
            startManagingCursor(cursor);        

            // Establish the item mapping
//          String[] columns = new String[] {"name", "price"};
//          int[] to = new int[] {R.id.tv_description, R.id.tv_price};

//          adapter = new SimpleCursorAdapter(this, R.layout.item_list_select, cursor, columns, to, 0);
//          lvSelectItems.setAdapter(adapter);

/*          
            adapter.setViewBinder(new SimpleCursorAdapter.ViewBinder() { 

                public boolean setViewValue(View view, Cursor cursor, int columnIndex) { 
                    if(columnIndex == cursor.getColumnIndexOrThrow(OrderDetailTable.ORDERDETAIL_PRICE)) { 

                  //          String createDate = aCursor.getString(aColumnIndex); 
                  //          TextView textView = (TextView) aView; 
                  //          textView.setText("Create date: " + MyFormatterHelper.formatDate(getApplicationContext(), createDate)); 

                            double total = cursor.getDouble(columnIndex);
                            TextView textView = (TextView) view;
                            textView.setText("$" + String.format("%.2f",dRound(total, 2)));

                            return true; 
                    } 
                    return false; 
                } 

            });
*/          
            // tblItems

            int totalRows = 0;
            int tcolumn = 1;

            int numItems = cursor.getCount();
            double tempRow = numItems / 2;

            if (numItems > 0) {
                itemsFound = true;
            } else {
                itemsFound = false;
            }

            long iPart;  // Integer part
            double fPart;  // Fractional part
            boolean ifFirst = true;

            // Get user input
            iPart = (long) tempRow;
            fPart = tempRow - iPart;

            if (fPart > 0) {
                totalRows = (int) (iPart + 1);
            } else {
                totalRows = (int) iPart;
            }

            TableRow row = null;

            cursor.moveToFirst(); 
            while (cursor.isAfterLast() == false)  
            { 
                // tblItems    // TableLayout
                // TableRow
                // RelativeLayout
                // ImageView
                // TextView
                // TextView

                if (ifFirst) {
                    // create a new TableRow
                    row = new TableRow(this);
                    ifFirst = false;
                }

                // Creating a new RelativeLayout
                RelativeLayout relativeLayout = new RelativeLayout(this);


                // Defining the RelativeLayout layout parameters.
                // In this case I want to fill its parent
                RelativeLayout.LayoutParams rlp = new RelativeLayout.LayoutParams(
                        RelativeLayout.LayoutParams.WRAP_CONTENT,
                        RelativeLayout.LayoutParams.WRAP_CONTENT);   

                rlp.setMargins(5, 5, 5, 5);

                relativeLayout.setPadding(5, 5, 5, 5);
                relativeLayout.setBackgroundResource(R.drawable.grpbx_item);

                row.addView(relativeLayout, rlp);

                // add text view
                ImageView imgPic = new ImageView(this);
                imgPic.setBackgroundResource(R.drawable.takepic);
                imgPic.setPadding(0, 0, 0, 0);
                relativeLayout.addView(imgPic);

                // add text view
                TextView tvName = new TextView(this);
                String name = cursor.getString(cursor.getColumnIndexOrThrow(ItemsTable.ITEM_NAME));
                tvName.setText("" + name);

             // Defining the layout parameters of the TextView
                RelativeLayout.LayoutParams lp = new RelativeLayout.LayoutParams(
                        RelativeLayout.LayoutParams.WRAP_CONTENT,
                        RelativeLayout.LayoutParams.WRAP_CONTENT);
                lp.addRule(RelativeLayout.CENTER_IN_PARENT);

           //     RelativeLayout.

                // Setting the parameters on the TextView
                tvName.setLayoutParams(lp);
                relativeLayout.addView(tvName);

                // add text view
                double iPrice = cursor.getDouble(cursor.getColumnIndexOrThrow(ItemsTable.ITEM_PRICE));

                TextView tvPrice = new TextView(this);
                tvPrice.setText("$" + String.format("%.2f",dRound(iPrice, 2)));
                relativeLayout.addView(tvPrice);


                tcolumn++;

                numItems--;

                if (tcolumn == 3) {
                    // add the TableRow to the TableLayout
                    tblItems.addView(row,new TableLayout.LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT));

                    // create a new TableRow
                    row = new TableRow(this);
                    tcolumn = 1;
                } else {
                    if (numItems == 0) {
                        // add the TableRow to the TableLayout
                        tblItems.addView(row,new TableLayout.LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT));
                    }
                }

                // Move to the next record
                cursor.moveToNext(); 
            } 

        }

解决方案

If I try to set the layout params for the relativeLayout then nothing appears and get no errors. If I don't then everything appears but with the layout being set to wrapcontent.

You use the wrong LayoutParams for the RelativeLayout. You use:

RelativeLayout.LayoutParams rlp = new RelativeLayout.LayoutParams(
                        RelativeLayout.LayoutParams.WRAP_CONTENT,
                        RelativeLayout.LayoutParams.WRAP_CONTENT);   
row.addView(relativeLayout, rlp);

but as the parent of that RelativeLayout is a TableRow you must use TableRow.LayoutParams:

TableRow.LayoutParams rlp = new TableRow.LayoutParams(
                        TableRow.LayoutParams.FILL_PARENT,
                        TableRow.LayoutParams.WRAP_CONTENT);   
row.addView(relativeLayout, rlp);

这篇关于动态创建的TableRow，然后RelativeLayout的不显示的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！