OnClick 动态地将新行添加到 TableLayout 并从数据库中获取值将其显示在添加的行中并给出总数

Question

This is the link to the screen

  private void sendBarcode(final String barcodeNum)throws JSONException
{
    final Context context = getApplicationContext();

    StringRequest stringReq = new StringRequest(Request.Method.POST, ITEM_URL,
            new Response.Listener<String>() {
                @Override
                public void onResponse(String response) {

                    showItem(response);

                }
            },
            new Response.ErrorListener() {
                @Override
                public void onErrorResponse(VolleyError error) {
                    Toast.makeText(context, error.toString(), Toast.LENGTH_SHORT).show();
                }
            }){
        @Override
        protected Map<String, String> getParams() throws AuthFailureError
        {
            Map<String,String> params = new HashMap<>();
            params.put(KEY_BARCODE,barcodeNum);
            return params;

        }
    };
    RequestQueue reqQueue = Volley.newRequestQueue(context);
    reqQueue.add(stringReq);

}

这是我用来将数据发送到数据库的 Volley 代码，即我将条形码发送到数据库并获取相应的项目。

目前我只是以列表格式显示获取的数据。我想以表格格式显示它，并显示获取的项目的总和。要以列表格式显示，我使用以下代码

private void showItem(String json)
{
    ParseBarcode pb = new ParseBarcode(json);
    pb.parseBarcode();
    BarcodeList bl = new BarcodeList(this,ParseBarcode.itembarcode,ParseBarcode.itemdesc,ParseBarcode.weight,ParseBarcode.rate,ParseBarcode.making,ParseBarcode.netrate,ParseBarcode.total);
    invest_listview.setAdapter(bl);
}

json parser class   
public class ParseBarcode {
    public static String[] itembarcode;
    public static String[] itemdesc;
    public static String[] weight;
    public static String[] rate;
    public static String[] making;
    public static String[] netrate;
    public static String[] total;

    public static final String JSON_ARRAY ="result";
    public static final String KEY_BARCODE ="itembarcode";
    public static final String KEY_DESC="itemdesc";
    public static final String KEY_WEIGHT="weight";
    public static final String KEY_RATE="rate";
    public static final String KEY_MAKING="making";
    public static final String KEY_NETRATE="netrate";
    public static final String KEY_TOTAL ="total";


    private JSONArray items =null;

    private String json;

    public ParseBarcode(String json){
        this.json = json;
    }

    protected void parseBarcode(){
        JSONObject jsonObject =null;
        try {
            jsonObject = new JSONObject(json);
            items = jsonObject.getJSONArray(JSON_ARRAY);

            itembarcode = new String[items.length()];
            itemdesc = new String[items.length()];
            weight = new String[items.length()];
            rate = new String[items.length()];
            making = new String[items.length()];
            netrate = new String[items.length()];
            total = new String[items.length()];

            for (int i=0; i<items.length();i++)
            {
                JSONObject jo = items.getJSONObject(i);
                itembarcode[i] = jo.getString(KEY_BARCODE);
                itemdesc[i] = jo.getString(KEY_DESC);
                weight[i] = jo.getString(KEY_WEIGHT);
                rate[i] = jo.getString(KEY_RATE);
                making[i] = jo.getString(KEY_MAKING);
                netrate[i] = jo.getString(KEY_NETRATE);
                total[i] = jo.getString(KEY_TOTAL);
            }
        } catch (JSONException e) {
            e.printStackTrace();
        }
    }


}

This is my xml layout

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <android.support.v7.widget.Toolbar
        android:id="@+id/inv_est_toolbar"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_alignParentTop="true"
        android:background="@color/colorPrimary"
        android:elevation="6dp"
        android:minHeight="?attr/actionBarSize"
        android:popupTheme="@style/ThemeOverlay.AppCompat.Dark.ActionBar"
        android:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar" />


    <RelativeLayout
        android:id="@+id/rl_inv_est"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_below="@+id/inv_est_toolbar"
        android:orientation="vertical">

        <TextView
            android:id="@+id/tv_invoice"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_toLeftOf="@+id/switch_bt"
            android:layout_alignParentTop="true"
            android:text="Invoice"
            android:textSize="40dp" />

        <Switch
            android:id="@+id/switch_bt"
            android:layout_centerHorizontal="true"
            android:layout_alignTop="@+id/tv_invoice"
            android:layout_alignBottom="@+id/tv_invoice"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_alignParentTop="true"
            />

        <TextView
            android:id="@+id/tv_estimate"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_toRightOf="@+id/switch_bt"
            android:text="Estimate"
            android:textSize="40dp" />

    </RelativeLayout>

    <LinearLayout
        android:id="@+id/ll_inv_est"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_below="@+id/rl_inv_est"
        android:orientation="horizontal">

        <ImageView
            android:id="@+id/iv_logo"
            android:layout_weight="1"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:src="@drawable/users" />

        <LinearLayout
            android:id="@+id/ll_inv_est1"
            android:layout_weight="1"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:orientation="vertical">

            <TextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="Company Name"
                android:textColor="@android:color/black"
                android:textSize="40dp" />

            <TextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="Company Address"
                android:textSize="24dp" />

            <TextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="Phone:83842382383"
                android:textSize="24dp" />

        </LinearLayout>

        <LinearLayout
            android:id="@+id/ll_inv_est2"
            android:layout_weight="1"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:orientation="vertical">

            <LinearLayout
                android:id="@+id/ll_inv_est_inner"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:orientation="horizontal">

                <TextView
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:text="Invoice No:"
                    android:textSize="24dp" />

                <TextView
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:text="1842"
                    android:textColor="@android:color/black"
                    android:textSize="32dp" />
            </LinearLayout>

            <LinearLayout
                android:id="@+id/ll_inv_est_inner1"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:orientation="horizontal">

                <TextView
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:text="Date :"
                    android:textSize="24dp" />
                <TextView
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:text="25/10/2015"
                    android:textColor="@android:color/black"
                    android:textSize="24dp" />


            </LinearLayout>

        </LinearLayout>
        <LinearLayout
            android:id="@+id/ll_inv_est3"
            android:layout_weight="1"
            android:orientation="vertical"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content">

            <LinearLayout
                android:id="@+id/ll_inv_est_inner2"
                android:orientation="horizontal"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content">

                <TextView
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:text="Customer :"
                    android:textSize="24dp"/>

                <TextView
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:text="Test Cust1"
                    android:textSize="24dp"/>

            </LinearLayout>

            <LinearLayout
                android:id="@+id/ll_inv_est_inner3"
                android:orientation="horizontal"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content">

                <TextView
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:text="Contact:"
                    android:textSize="24dp"/>


                <TextView
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:text="+91-8600931386"
                    android:textSize="24dp"/>
            </LinearLayout>


        </LinearLayout>

    </LinearLayout>

<TableLayout
    android:id="@+id/tl_invest"
    android:layout_marginTop="16dp"
    android:layout_below="@+id/ll_inv_est"
    android:layout_width="match_parent"
    android:layout_height="wrap_content">
    <TableRow
        android:id="@+id/tr_invest"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:layout_marginLeft="16dp"
        android:layout_marginRight="16dp"
        >
        <TextView
            android:layout_weight="1"
            android:gravity="center"
            android:text="Barcode"
            android:textAllCaps="true"
            android:textSize="16sp" />

        <TextView
            android:layout_weight="1"
            android:gravity="center"
            android:text="item desc"
            android:textAllCaps="true"
            android:textSize="16sp" />
        <TextView
            android:layout_weight=".75"
            android:gravity="center"
            android:text="Weight"
            android:textAllCaps="true"
            android:textSize="16sp" />
        <TextView
            android:layout_weight=".5"
            android:gravity="center"
            android:text="Rate\n(per 10gm)"
            android:textAllCaps="true"
            android:textSize="16sp" />
        <TextView
            android:layout_weight=".5"
            android:gravity="center"
            android:text="Making\n(per 10gm)"
            android:textAllCaps="true"
            android:textSize="16sp" />
        <TextView
            android:layout_weight=".5"
            android:gravity="center"
            android:text="net rate\n(per 10gm)"
            android:textAllCaps="true"
            android:textSize="16sp" />
        <TextView
            android:layout_weight="1"
            android:gravity="center"
            android:text="total"
            android:textAllCaps="true"
            android:textSize="16sp" />
    </TableRow>


</TableLayout>

    <ListView
        android:id="@+id/lv_invest"
        android:layout_below="@+id/tl_invest"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        />

    <ImageButton
        android:id="@+id/ib_plus"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:src="@drawable/plus"
        android:layout_alignTop="@+id/ib_save"
        android:layout_toLeftOf="@+id/ib_save"
        android:layout_toStartOf="@+id/ib_save" />
    <ImageButton
        android:id="@+id/ib_save"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:src="@drawable/save"
        android:layout_alignParentBottom="true"
        android:layout_toLeftOf="@+id/ib_printer"
        android:layout_toStartOf="@+id/ib_printer" />
    <ImageButton
        android:id="@+id/ib_printer"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:src="@drawable/printer"
        android:layout_alignParentBottom="true"
        android:layout_toLeftOf="@+id/imageButton2"
        android:layout_toStartOf="@+id/imageButton2" />

    <ImageButton
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:src="@drawable/window_close"
        android:layout_marginRight="34dp"
        android:layout_marginEnd="34dp"
        android:id="@+id/imageButton2"
        android:layout_alignTop="@+id/ib_save"
        android:layout_alignParentRight="true"
        android:layout_alignParentEnd="true" />


    <LinearLayout
        android:id="@+id/ll_inv_est4"
        android:orientation="vertical"
        android:layout_toLeftOf="@+id/ib_plus"
        android:layout_alignParentBottom="true"
        android:layout_marginBottom="16dp"
        android:layout_marginRight="16dp"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content">
        <LinearLayout
            android:id="@+id/ll_inv_est_inner4"
            android:orientation="horizontal"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content">
            <TextView
                android:id="@+id/tv_vattitle"
                android:textSize="16sp"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="VAT TIN NO ."/>
            <TextView
                android:id="@+id/tv_vatno"
                android:textSize="16sp"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="13284715/V/1.4.06 w.e.f.1.4.06"
                android:layout_alignParentBottom="true"
                />
        </LinearLayout>
        <LinearLayout
            android:id="@+id/ll_inv_est_inner5"
            android:orientation="horizontal"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content">
            <TextView
                android:id="@+id/tv_csttitle"
                android:textSize="16sp"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="CST TIN NO."/>
            <TextView
                android:id="@+id/tv_cstno"
                android:textSize="16sp"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="13284715/V/1.4.06 w.e.f.1.4.06"
                android:layout_alignParentBottom="true"
                />

        </LinearLayout>

    </LinearLayout>


</RelativeLayout>

This is the on options item selected code for the plus icon in the toolbar and its xml as follows:

@Override
public boolean onOptionsItemSelected(MenuItem item) {
    switch (item.getItemId())
    {
        case android.R.id.home:
            super.onBackPressed();
            return true;
        case R.id.action_add:
            final Dialog dialog = new Dialog(this);
            dialog.setContentView(R.layout.barcodenum);

            TextView title = (TextView) dialog.findViewById(R.id.tv_bctitle);
            title.setText("Enter Barcode Number");
            final String bcNumber;

            EditText barcode = (EditText) dialog.findViewById(R.id.et_bcNum);
            bcNumber = barcode.getText().toString();

            Button bt_save = (Button) dialog.findViewById(R.id.bt_bcenter);
            bt_save.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v)
                {
                    try {
                        sendBarcode(bcNumber);
                    } catch (JSONException e) {
                        e.printStackTrace();
                    }

                }
            });


            dialog.show();
            return true;
    }
    return super.onOptionsItemSelected(item);
}

对话框的xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:layout_margin="10dp"
    >

    <TextView
        android:id="@+id/tv_bctitle"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:textSize="40sp"
        />

        <TextView
            android:id="@+id/tv_bcName"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="Barcode No."
            android:layout_alignBottom="@+id/ti_barcode"
            android:layout_alignParentLeft="true"
            android:layout_alignParentStart="true" />
        <android.support.design.widget.TextInputLayout
            android:id="@+id/ti_barcode"
            android:layout_below="@+id/tv_bctitle"
            android:layout_toRightOf="@id/tv_bcName"
            android:layout_width="500dp"
            android:layout_height="wrap_content">
        <EditText
            android:id="@+id/et_bcNum"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:hint="Enter barcode number"
            />
        </android.support.design.widget.TextInputLayout>



    <Button
        android:id="@+id/bt_bcenter"
        android:layout_below="@+id/ti_barcode"
        android:layout_marginTop="16dp"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_centerHorizontal="true"
        android:text="SAVE"
        />
    </RelativeLayout>

Answer 1

好吧，我不会指导你，但是我会为你提供一个非常基本的例子来创建一个表并向它添加数据。现在在这个例子中，你会看到我实际上是在使用一个按钮来添加数据，但是在添加从服务器接收到的解析数据方面，原则将保持不变。如何解析这些数据我将留给你。 本质上，我们在这里拥有的是一个“空白”的 TableLayout，我已将标题添加到其中。如您所见，我没有在标题之后添加任何 TableRows，因为这将通过您对数据的解析（或者在我的示例中按下按钮）来添加。

这是表格屏幕布局

    <RelativeLayout
        android:layout_width="match_parent"
        android:layout_height="72dp">

        <Button
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="Add Row"
            android:id="@+id/button"
            android:layout_centerVertical="true"
            android:layout_alignParentRight="true"
            android:layout_alignParentEnd="true" />
    </RelativeLayout>

    <TableRow android:layout_height="wrap_content">
        <TextView
            android:id="@+id/barcode"
            android:text="Barcode"
            android:layout_height="wrap_content"
            />
        <TextView
            android:id="@+id/itemDesc"
            android:text="Item Desc."
            android:layout_height="wrap_content"
            />
        <TextView
            android:id="@+id/weight"
            android:text="Weight"
            android:layout_height="wrap_content"
            />
        <TextView
            android:id="@+id/rate"
            android:text="      Rate \n (Per 10GM)"
            android:layout_height="wrap_content"
            />
        <TextView
            android:id="@+id/making"
            android:text="      Making \n (Per 10GM)"
            android:layout_height="wrap_content"
            />
        <TextView
            android:id="@+id/net"
            android:text="Net Rate"
            android:layout_height="wrap_content"
            />
        <TextView
            android:id="@+id/total"
            android:text="Total"
            android:layout_height="wrap_content"
            />
    </TableRow>
  </TableLayout>
</LinearLayout>

现在，正如我所说，我不会过度解析您的 JSON 数据，因为您似乎已经掌握了它，我将留给您。但是，对于添加行的示例，我已在按钮中添加了该按钮，该按钮仅在按下按钮时添加带有虚拟数据的行。当您添加数据时，该操作将非常相似，只是您需要循环或其他东西来获取所有数据。

public class MainActivity extends AppCompatActivity {
Button btn;
TableLayout table;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    btn = (Button) findViewById(R.id.button);
    table = (TableLayout) findViewById(R.id.ourTableLayout);

    btn.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            TableRow newRow = new TableRow(MainActivity.this);
            TextView barCode = new TextView(MainActivity.this);
            TextView itemDesc = new TextView(MainActivity.this);
            TextView weightLine = new TextView(MainActivity.this);
            TextView rateAmount = new TextView(MainActivity.this);
            TextView makingAmount = new TextView(MainActivity.this);
            TextView netRate = new TextView(MainActivity.this);
            TextView total = new TextView(MainActivity.this);

            barCode.setText("Barcodes");
            itemDesc.setText("Descriptions");
            weightLine.setText("Weights");
            rateAmount.setText("Rates");
            makingAmount.setText("Makings");
            netRate.setText("Nets");
            total.setText("Totals");

            newRow.addView(barCode);
            newRow.addView(itemDesc);
            newRow.addView(weightLine);
            newRow.addView(rateAmount);
            newRow.addView(makingAmount);
            newRow.addView(netRate);
            newRow.addView(total);
            table.addView(newRow);

        }
    });
  }
}

点击几下按钮后，我们有：

现在如上所述，您肯定需要做一些跑腿工作才能正确解析数据，但这应该足以让您启动并运行。