android - 如何在单击按钮时从 ListView 自定义适配器获取所有 TextView 数据

Question

所以，这是我的代码，我想做的是通过单击“保存”按钮从 ListView 自定义适配器获取所有数据。我在这里所拥有的是我可以从 ListView 中删除单个数据，或者我可以通过单击删除按钮将其全部删除。我的问题是，我无法通过单击保存按钮并存储在字符串中来从 ListView 中获取所有数据。 Here is the image.

ReviewYourOrder.java

package com.example.orderingsystem;
import java.util.ArrayList;
.....

public class ReviewYourOrder extends Activity implements View.OnClickListener {

private static final String TAG = RegisterActivity.class.getSimpleName();

DatabaseAdapter ourDatabase;
Typeface customFont;
TextView review_you_order_txt,review_your_order_quantity,review_your_order_description,review_your_order_price;
Button save,cancel;
ListView myList;

@SuppressLint("NewApi") @Override
protected void onCreate(Bundle savedInstanceState) {
    // TODO Auto-generated method stub
    super.onCreate(savedInstanceState);
    setContentView(R.layout.reviewyourorder);

    customFont = Typeface.createFromAsset(getAssets(), "fonts/EraserRegular.ttf");

    review_you_order_txt = (TextView)findViewById(R.id.review_your_order_tv);
    review_you_order_txt.setTypeface(customFont);

    review_your_order_quantity = (TextView)findViewById(R.id.review_your_order_quantity_tv);
    review_your_order_quantity.setTypeface(customFont);

    review_your_order_description = (TextView)findViewById(R.id.review_your_order_description_tv);
    review_your_order_description.setTypeface(customFont);

    review_your_order_price = (TextView)findViewById(R.id.review_your_order_price_tv);
    review_your_order_price.setTypeface(customFont);

    save = (Button)findViewById(R.id.save_button);
    save.setOnClickListener(this);
    save.setTypeface(customFont);

    cancel = (Button)findViewById(R.id.cancel_button);
    cancel.setOnClickListener(this);
    cancel.setTypeface(customFont);

    openDB();
    ourDatabase.open();
    final Cursor c = ourDatabase.getAllDataReviewYourOrder();
    String[] ReviewYourOrderNames = new String[] {DatabaseAdapter.KEY_REVIEWYOURORDER_TABLENUMBER,DatabaseAdapter.KEY_REVIEWYOURORDER_DESC,DatabaseAdapter.KEY_REVIEWYOURORDER_PRICE,DatabaseAdapter.KEY_REVIEWYOURORDER_QUANTITY};
    int[] ReviewYourOrderID = new int[] {R.id.tablenumber,R.id.itemdesc,R.id.itemprice,R.id.itemquantity};
    final SimpleCursorAdapter myCursorAdapter;
    myCursorAdapter = new SimpleCursorAdapter(getBaseContext(),R.layout.reviewyourorder_items, c, ReviewYourOrderNames, ReviewYourOrderID,0);
    myList = (ListView)findViewById(R.id.review_your_order_listview);
    myList.setAdapter(myCursorAdapter);

    myList.setOnItemClickListener(new OnItemClickListener() {
        @Override
        public void onItemClick(AdapterView<?> parent, View view, final int position, final long id_o) {
            // TODO Auto-generated method stub
            AlertDialog.Builder adb = new AlertDialog.Builder(ReviewYourOrder.this);
            adb.setTitle("Delete?");
            adb.setMessage("Are you sure you want to remove this Order?");
            adb.setNegativeButton("Cancel", null);
            adb.setPositiveButton("Ok", new AlertDialog.OnClickListener() {
                public void onClick(DialogInterface dialog, int id) {
                    // TODO Auto-generated method stub
                    ourDatabase.open();
                    ourDatabase.deleteReviewYourOrder(id_o);
                    myCursorAdapter.notifyDataSetChanged();
                    Intent intent = getIntent();
                    finish();
                    startActivity(intent);
                }});
            adb.show();
          }
    });
}

private void openDB() {
    ourDatabase = new DatabaseAdapter(this);
    ourDatabase.open();
}

@Override
public void onClick(View v) {
    // TODO Auto-generated method stub
    switch(v.getId())
    {
    case R.id.save_button:
        String sample;
        sample = "asd";
            addOrder(sample.toString(),sample.toString(),sample.toString());
        break;
    case R.id.cancel_button:
        AlertDialog.Builder dialog = new AlertDialog.Builder(ReviewYourOrder.this);
        dialog.setTitle("CANCEL ORDER?");
        dialog.setMessage("Are you sure you want to Cancel your Order?");
        dialog.setNegativeButton("Cancel", null);
        dialog.setPositiveButton("OK", new AlertDialog.OnClickListener() {
            @Override
            public void onClick(DialogInterface dialog, int which) {
                // TODO Auto-generated method stub
                ourDatabase.open();
                ourDatabase.deleteAllDataReviewYourOrder();
                Toast.makeText(getBaseContext(), "Order Canceled",Toast.LENGTH_SHORT).show();
            }
        });
        dialog.show();
    }
}

private void addOrder(final String desc, final String price, final String quantity) {
    // Tag used to cancel the request
    String tag_string_req = "req_registerpatient";

    StringRequest strReq = new StringRequest(Method.POST,
            AppConfig.URL_REGISTER, new Response.Listener<String>() {

                @Override
                public void onResponse(String response) {
                    Log.d(TAG, "Register Response: " + response.toString());


                    try {
                        JSONObject jObj = new JSONObject(response);
                        boolean error = jObj.getBoolean("error");
                        if (!error) {
                            Toast.makeText(getApplicationContext(),
                                    "Order Added.", Toast.LENGTH_LONG)
                                    .show();                            

                        } else {

                            // Error occurred in registration. Get the error
                            // message
                            String errorMsg = jObj.getString("error_msg");
                            Toast.makeText(getApplicationContext(),
                                    errorMsg, Toast.LENGTH_LONG).show();
                        }
                    } catch (JSONException e) {
                        e.printStackTrace();
                    }

                }
            }, new Response.ErrorListener() {

                @Override
                public void onErrorResponse(VolleyError error) {
                    Log.e(TAG, "Registration Error: " + error.getMessage());
                    Toast.makeText(getBaseContext(),
                            error.getMessage(), Toast.LENGTH_LONG).show();

                }
            }) {

        @Override
        protected Map<String, String> getParams() {
            // Posting params to register url
            Map<String, String> params = new HashMap<String, String>();
            params.put("tag", "add_order");
            params.put("desc", desc);
            params.put("price", price);
            params.put("quantity", quantity);



            return params;
        }

    };

    // Adding request to request queue
    AppController.getInstance().addToRequestQueue(strReq, tag_string_req);

}

我的 xml 文件中有两个按钮保存和取消按钮。

查看您的订单.xml

<?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:background="@drawable/greenboard_background" >

<TextView
    android:id="@+id/review_your_order_tv"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_alignParentTop="true"
    android:layout_centerHorizontal="true"
    android:layout_marginTop="45dp"
    android:text="@string/review_your_order"
    android:textAppearance="?android:attr/textAppearanceLarge"
    android:textSize="35sp"  />

<TextView
    android:id="@+id/review_your_order_quantity_tv"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_alignLeft="@+id/review_your_order_listview"
    android:layout_below="@+id/review_your_order_tv"
    android:text="@string/quantity"
    android:textAppearance="?android:attr/textAppearanceLarge"
    android:textSize="25sp" />

<TextView
    android:id="@+id/review_your_order_description_tv"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_alignBaseline="@+id/review_your_order_quantity_tv"
    android:layout_alignBottom="@+id/review_your_order_quantity_tv"
    android:layout_centerHorizontal="true"
    android:text="@string/ryo_description"
    android:textAppearance="?android:attr/textAppearanceLarge"
    android:textSize="25sp" />

<TextView
    android:id="@+id/review_your_order_price_tv"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_above="@+id/review_your_order_listview"
    android:layout_alignRight="@+id/review_your_order_listview"
    android:layout_marginRight="30dp"
    android:text="@string/item_price"
    android:textAppearance="?android:attr/textAppearanceLarge" />

<ListView
    android:id="@+id/review_your_order_listview"
    android:layout_width="543dp"
    android:layout_height="695dp"
    android:layout_below="@+id/review_your_order_quantity_tv"
    android:layout_marginTop="5dp"
    android:layout_centerHorizontal="true">
</ListView>

<Button
    android:id="@+id/save_button"
    android:layout_width="260dp"
    android:layout_height="70dp"
    android:layout_alignRight="@+id/review_your_order_listview"
    android:layout_below="@+id/review_your_order_listview"
    android:layout_marginTop="10dp"
    android:text="@string/save"
    android:textSize="40sp" />

<Button
    android:id="@+id/cancel_button"
    android:layout_width="260dp"
    android:layout_height="70dp"
    android:layout_alignLeft="@+id/review_your_order_listview"
    android:layout_alignTop="@+id/save_button"
    android:text="@string/cancel"
    android:textSize="40sp" />

这里是我的 TextView ，它们在我的自定义 ListView 中用作我的项目。

查看您的订单项目.xml。

<?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" >

<TextView
    android:id="@+id/tablenumber"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_centerHorizontal="true"
    android:layout_alignParentTop="true"
    android:text="@string/table_no"
    android:textAppearance="?android:attr/textAppearanceLarge" 
    android:textSize="30sp" />

<TextView
    android:id="@+id/itemquantity"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_alignParentLeft="true"
    android:layout_below="@+id/tablenumber"
    android:layout_marginLeft="41dp"
    android:text="@string/item_quantity"
    android:textAppearance="?android:attr/textAppearanceLarge"
    android:textSize="30sp" />

<TextView
    android:id="@+id/itemdesc"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_alignBaseline="@+id/itemprice"
    android:layout_alignBottom="@+id/itemprice"
    android:layout_centerHorizontal="true"
    android:text="@string/item_desc"
    android:textAppearance="?android:attr/textAppearanceLarge"
    android:textSize="30sp" />

<TextView
    android:id="@+id/itemprice"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_alignBaseline="@+id/itemquantity"
    android:layout_alignBottom="@+id/itemquantity"
    android:layout_alignParentRight="true"
    android:layout_marginRight="56dp"
    android:text="@string/item_price"
    android:textAppearance="?android:attr/textAppearanceLarge"
    android:textSize="30sp" />

Answer 1

希望对你有所帮助

int itemsCount = myList.getChildCount();
for (int i = 0; i < itemsCount; i++) {
     View view = myList.getChildAt(i);
     String itemquantity = ((TextView) view.findViewById(R.id.itemquantity)).getText().toString();
     String itemdesc = ((TextView) view.findViewById(R.id.itemdesc)).getText().toString();
     String itemprice = ((TextView) view.findViewById(R.id.itemprice)).getText().toString();
     addOrder(itemdesc,itemprice,itemquantity);
}