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Question

我做了什么 ::我有来自服务器＆amp ;;的项目列表在listview中显示每行列表中都有一个复选框，列表视图顶部还有一个按钮，如下图所示

enter image description here

我需要做什么 ::

按钮next如图所示我必须能够显示吐司所选元素的消息
我不知道如何填写onclick函数的部分代码中的checkButtonClick()

ListViewAdapterForAtomicListItemtype.java

public class ListViewAdapterForAtomicListItemtype extends BaseAdapter {

    // Declare Variables
    Context context;
    LayoutInflater inflater;
    ArrayList<HashMap<String, String>> data;
    HashMap<String, String> resultp = new HashMap<String, String>();

    public ListViewAdapterForAtomicListItemtype(Context context,
            ArrayList<HashMap<String, String>> arraylist) {
        this.context = context;
        data = arraylist;
    }

    @Override
    public int getCount() {
        return data.size();
    }

    @Override
    public Object getItem(int position) {
        return null;
    }

    @Override
    public long getItemId(int position) {
        return 0;
    }

    public View getView(final int position, View convertView, ViewGroup parent) {
        // Declare Variables
        TextView name;

        inflater = (LayoutInflater) context
                .getSystemService(Context.LAYOUT_INFLATER_SERVICE);

        View itemView = inflater.inflate(R.layout.listview_item_for_atomic_list_item_type, parent, false);
        // Get the position
        resultp = data.get(position);

        // Locate the TextViews in listview_item.xml
        name = (TextView) itemView.findViewById(R.id.textView_id_atomic_list_item_type);

        // Capture position and set results to the TextViews
        name.setText(resultp.get(MainActivity.NAME));


        return itemView;
    }
}

listview_main_atomic_list_itemtype.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" >

    <ListView
        android:id="@+id/listview"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:layout_below="@+id/button1" />

    <Button
        android:id="@+id/button_of_listview_main_atomic_list_itemtype_id"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_alignParentRight="true"
        android:layout_alignParentTop="true"
        android:text="DisplayItems" />

</RelativeLayout>

listview_item_for_atomic_list_item_type.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/textView_id_atomic_list_item_type"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentTop="true"
        android:layout_centerHorizontal="true"
        android:layout_marginTop="17dp"
        android:text="Large Text"
        android:textAppearance="?android:attr/textAppearanceLarge" />

    <CheckBox
        android:id="@+id/checkBox_atomic_list_item_type_id"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true" />

</RelativeLayout>

BLD_IndividualListOfItems_Starters.java

public class BLD_IndividualListOfItems_Starters extends Activity{
    // Declare Variables
    JSONObject jsonobject;
    JSONArray jsonarray;
    ListView listview;
    ListViewAdapterForAtomicListItemtype adapter;
    ProgressDialog mProgressDialog;
    ArrayList<HashMap<String, String>> arraylist;
    static String NAME = "rank";


    String TYPE_FILTER;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        // Get the view from listview_main.xml
        setContentView(R.layout.listview_main_atomic_list_itemtype);

        TYPE_FILTER = getIntent().getExtras().getString("key_title");
        Log.v("---- Value-Start---", TYPE_FILTER);
        // Locate the listview in listview_main.xml
        listview = (ListView) findViewById(R.id.listview);

        // Execute DownloadJSON AsyncTask
        new DownloadJSON().execute();
    }

    // DownloadJSON AsyncTask
    private class DownloadJSON extends AsyncTask<Void, Void, Void> {

        @Override
        protected void onPreExecute() {
            super.onPreExecute();
            // Create a progressdialog
            mProgressDialog = new ProgressDialog(BLD_IndividualListOfItems_Starters.this);
            // Set progressdialog title
            //mProgressDialog.setTitle("Fetching the information");
            // Set progressdialog message
            mProgressDialog.setMessage("Loading...");
            mProgressDialog.setIndeterminate(false);
            // Show progressdialog
            mProgressDialog.show();
        }

        @Override
        protected Void doInBackground(Void... params) {
            // Create an array
            arraylist = new ArrayList<HashMap<String, String>>();

            String newurl = "?" + "Key=" + TYPE_FILTER;


            // Retrieve JSON Objects from the given URL address
            jsonobject = JSONfunctions.getJSONfromURL("http://54.218.73.244:7005/RestaurantAtomicListItemType/"+newurl);

            try {
                // Locate the array name in JSON
                jsonarray = jsonobject.getJSONArray("restaurants");

                for (int i = 0; i < jsonarray.length(); i++) {
                    HashMap<String, String> map = new HashMap<String, String>();
                    jsonobject = jsonarray.getJSONObject(i);
                    // Retrive JSON Objects
                    map.put(MainActivity.NAME, jsonobject.getString("MasterListMenuName"));

                    // Set the JSON Objects into the array
                    arraylist.add(map);
                }
            } catch (JSONException e) {
                Log.e("Error", e.getMessage());
                e.printStackTrace();
            }
            return null;
        }

        @Override
        protected void onPostExecute(Void args) {
            // Pass the results into ListViewAdapter.java
            adapter = new ListViewAdapterForAtomicListItemtype(BLD_IndividualListOfItems_Starters.this, arraylist);
            // Set the adapter to the ListView
            listview.setAdapter(adapter);
            // Close the progressdialog
            mProgressDialog.dismiss();
        }
    }



    private void checkButtonClick() {


        Button myButton = (Button) findViewById(R.id.button_of_listview_main_atomic_list_itemtype_id);
        myButton.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View v) {





            }
        });

    }
}

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BLD_IndividualListOfItems_Starters.java

public class BLD_IndividualListOfItems_Starters extends Activity{
    // Declare Variables
    JSONObject jsonobject;
    JSONArray jsonarray;
    ListView listview;
    ListViewAdapterForAtomicListItemtype adapter;
    ProgressDialog mProgressDialog;
    ArrayList<HashMap<String, String>> arraylist;
    static String NAME = "rank";


    String TYPE_FILTER;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        // Get the view from listview_main.xml
        setContentView(R.layout.listview_main_atomic_list_itemtype);

        TYPE_FILTER = getIntent().getExtras().getString("key_title");
        Log.v("---- Value-Start---", TYPE_FILTER);
        // Locate the listview in listview_main.xml
        listview = (ListView) findViewById(R.id.listview);

        // Execute DownloadJSON AsyncTask
        new DownloadJSON().execute();
    }

    // DownloadJSON AsyncTask
    private class DownloadJSON extends AsyncTask<Void, Void, Void> {

        @Override
        protected void onPreExecute() {
            super.onPreExecute();
            // Create a progressdialog
            mProgressDialog = new ProgressDialog(BLD_IndividualListOfItems_Starters.this);
            // Set progressdialog title
            //mProgressDialog.setTitle("Fetching the information");
            // Set progressdialog message
            mProgressDialog.setMessage("Loading...");
            mProgressDialog.setIndeterminate(false);
            // Show progressdialog
            mProgressDialog.show();
        }

        @Override
        protected Void doInBackground(Void... params) {
            // Create an array
            arraylist = new ArrayList<HashMap<String, String>>();

            String newurl = "?" + "Key=" + TYPE_FILTER;


            // Retrieve JSON Objects from the given URL address
            jsonobject = JSONfunctions.getJSONfromURL("http://54.218.73.244:7005/RestaurantAtomicListItemType/"+newurl);

            try {
                // Locate the array name in JSON
                jsonarray = jsonobject.getJSONArray("restaurants");

                for (int i = 0; i < jsonarray.length(); i++) {
                    HashMap<String, String> map = new HashMap<String, String>();
                    jsonobject = jsonarray.getJSONObject(i);
                    // Retrive JSON Objects
                    map.put(MainActivity.NAME, jsonobject.getString("MasterListMenuName"));

                    // Set the JSON Objects into the array
                    arraylist.add(map);
                }
            } catch (JSONException e) {
                Log.e("Error", e.getMessage());
                e.printStackTrace();
            }
            return null;
        }

        @Override
        protected void onPostExecute(Void args) {
            // Pass the results into ListViewAdapter.java
            adapter = new ListViewAdapterForAtomicListItemtype(BLD_IndividualListOfItems_Starters.this, arraylist);
            // Set the adapter to the ListView
            listview.setAdapter(adapter);
            // Close the progressdialog
            mProgressDialog.dismiss();
        }
    }



    private void checkButtonClick() {


        Button myButton = (Button) findViewById(R.id.button_of_listview_main_atomic_list_itemtype_id);
        myButton.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View v) {


                StringBuilder result = new StringBuilder();
                   for(int i=0;i<arraylist.size();i++)
                   {
                          if(adapter.mCheckStates.get(i)==true)
                          {

                              result.append(arraylist.get(i).get(MainActivity.NAME));
                              result.append("\n");
                          }

                    }
                    Toast.makeText(BLD_IndividualListOfItems_Starters.this, result, 1000).show();


            }
        });

    }
}

ListViewAdapterForAtomicListItemtype.java

public class ListViewAdapterForAtomicListItemtype extends BaseAdapter implements android.widget.CompoundButton.OnCheckedChangeListener{

    // Declare Variables
    Context context;
    LayoutInflater inflater;
    ArrayList<HashMap<String, String>> data;
    HashMap<String, String> resultp = new HashMap<String, String>();

    SparseBooleanArray mCheckStates; 

    public ListViewAdapterForAtomicListItemtype(Context context,
            ArrayList<HashMap<String, String>> arraylist) {
        this.context = context;
        data = arraylist;
        mCheckStates = new SparseBooleanArray(data.size()); 
    }

    @Override
    public int getCount() {
        return data.size();
    }

    @Override
    public Object getItem(int position) {
        return null;
    }

    @Override
    public long getItemId(int position) {
        return 0;
    }

    public View getView(final int position, View convertView, ViewGroup parent) {
        // Declare Variables
        TextView name;



        inflater = (LayoutInflater) context
                .getSystemService(Context.LAYOUT_INFLATER_SERVICE);

        View itemView = inflater.inflate(R.layout.listview_item_for_atomic_list_item_type, parent, false);
        // Get the position

        CheckBox chkSelect =(CheckBox) itemView.findViewById(R.id.checkBox_atomic_list_item_type_id);

        chkSelect.setTag(position);
        chkSelect.setChecked(mCheckStates.get(position, false));
        chkSelect.setOnCheckedChangeListener(this);


        resultp = data.get(position);

        // Locate the TextViews in listview_item.xml
        name = (TextView) itemView.findViewById(R.id.textView_id_atomic_list_item_type);

        // Capture position and set results to the TextViews
        name.setText(resultp.get(MainActivity.NAME));


        return itemView;
    }

    public boolean isChecked(int position) {
        return mCheckStates.get(position, false);
    }

    public void setChecked(int position, boolean isChecked) {
        mCheckStates.put(position, isChecked);

    }

    public void toggle(int position) {
        setChecked(position, !isChecked(position));

    }
    @Override
    public void onCheckedChanged(CompoundButton buttonView,
            boolean isChecked) {

        mCheckStates.put((Integer) buttonView.getTag(), isChecked);    

    }
}

Answer 1

您还可以使用 多个LISTVIEW选择 。

StringBuilder result;

单击按钮后，您可以执行以下操作：

btn.setOnClickListener(new OnClickListener() {

        @Override
        public void onClick(View v) {
            // TODO Auto-generated method stub

            result = new StringBuilder();
            for (int i = 0; i < arraylist.size(); i++) {
                if (adapter.mysparse.get(i) == true) {

                    result.append(arraylist.get(i).get(MainActivity.NAME));
                    result.append("\n");
                }

            }
            Intent n = new Intent(MainActivity.this, DisplayActivity.class);
            n.putExtra("buffer", result.toString());
            startActivity(n);
        }
    });

在您的 DisplayActivity 中，您可以这样做：

package com.example.singleitemlistview;

import java.util.ArrayList;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.widget.ArrayAdapter;
import android.widget.ListView;

public class DisplayActivity extends Activity {

ListView lv;
ArrayList<String> myList;
String myName;

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

    Intent n = getIntent();
    myName = n.getStringExtra("buffer");

    myList = new ArrayList<String>();

    lv = (ListView) findViewById(R.id.listViewData);

    myList.add(myName);

    lv.setAdapter(new ArrayAdapter<String>(DisplayActivity.this,
            android.R.layout.simple_list_item_1, myList));

}

}

Answer 2

使用SparseBooleanArray。

更多信息@

https://groups.google.com/forum/?fromgroups#!topic/android-developers/No0LrgJ6q2M

在您的适配器工具CompoundButton.OnCheckedChangeListener

中

public class ListViewAdapterForAtomicListItemtype extends BaseAdapter implements CompoundButton.OnCheckedChangeListener
{
SparseBooleanArray mCheckStates; 

 public ListViewAdapterForAtomicListItemtype(Context context,
            ArrayList<HashMap<String, String>> arraylist) {
        this.context = context;
        data = arraylist;
         mCheckStates = new SparseBooleanArray(data.size()); 
    }

然后在getView

   CheckBox chkSelect =(CheckBox) item.findViewById(R.id.CheckBox
    android:id="@+id/checkBox_atomic_list_item_type_id");

   chkSelect.setTag(position);
   chkSelect.setChecked(mCheckStates.get(position, false));
   chkSelect.setOnCheckedChangeListener(this);

覆盖以下方法

    public boolean isChecked(int position) {
        return mCheckStates.get(position, false);
    }

    public void setChecked(int position, boolean isChecked) {
        mCheckStates.put(position, isChecked);

    }

    public void toggle(int position) {
        setChecked(position, !isChecked(position));

    }
@Override
public void onCheckedChanged(CompoundButton buttonView,
        boolean isChecked) {

     mCheckStates.put((Integer) buttonView.getTag(), isChecked);    

}

onClick of Button

   StringBuilder result = new StringBuilder();
   for(int i=0;i<arraylist.size();i++)
   {
          if(adapter.mCheckStates.get(i)==true)
          {

              result.append(arrayList.get(i).get(MainActivtiy.Name));
              result.append("\n");
          }

    }
    Toast.makeText(ActivityName.this, result, 1000).show();

注意：

最好使用ViewHolder模式。

http://developer.android.com/training/improving-layouts/smooth-scrolling.html

Answer 3

StringBuffer result = new StringBuffer();
        result.append("TEXTVIEW 1  : ").append(chkbox1.isChecked());
        result.append("\nTEXTVIEW 2 : ").append(chkbox2.isChecked());
        result.append("\nTEXTVIEW 3 :").append(chkbox3.isChecked());

                //and so on.........

        Toast.makeText(MyAndroidAppActivity.this, result.toString(),
                Toast.LENGTH_LONG).show();

我认为你需要这个。只是更新你有解决方案。此代码必须位于onLlickListener的下一个按钮中。尝试一下投票和ping如果有效。在更新之前发生的事情。

增加：

mainListView.setOnItemClickListener(new OnItemClickListener() {
            public void onItemClick(AdapterView<?> parent, View view,
                    int position, long id) {

                String ss;
                ss=(String) ((TextView) view).getText();

此代码用于检查单击了哪个项目。通过列表的长度，检查循环以检查是否单击了其复选框。

您可以轻松附加已检查项目列表。

Answer 4

从未尝试但应该工作..您可以在onClick()中使用以下代码来获取每行的CheckBox状态。

    if (adapter!=null&&adapter.getCount()>0) {
        for(int i=0;i<adapter.getCount();i++){
            View view=(View)adapter.getItem(i);
            CheckBox chk=(CheckBox)view.findViewById(R.id.checkbox);
            TextView txt=(TextView)view.findViewById(R.id.textview);
            if (chk.isChecked()) {
                //do something here
            }
        }
    }

使用android中的复选框在listview中显示toast信息

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4 个答案: