Android 获取 listView 中所有选中复选框的文本 [英] Android get text of all checked checkboxes in listView

问题描述

你好，我创建了一个带有复选框的列表视图...但我不知道如何获取选中的复选框文本.. 这是activity_main.xml 的代码

hello i have created a listview with checkboxes in it... but i dont know how to get the check box text which are selected.. here is the code of activity_main.xml

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/LinearLayout1"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:gravity="top"
    android:orientation="vertical"
    tools:context=".MygamesActivity" >

    <ListView
        android:id="@android:id/list"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:layout_marginTop="20dp" />

</LinearLayout>

在列表视图 main.list_item.xml 中显示复选框的另一种布局

another layout which has checkboxes to show in the listview main.list_item.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android">
    <CheckBox
        android:id="@+id/checkBox1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="CheckBox"
         />
</LinearLayout>

这是扩展arrayadapter的类

and this is the class that extends arrayadapter

package com.wasiff.listview;

import android.content.Context;
import android.content.res.TypedArray;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.CheckBox;
import android.widget.ImageView;
import android.widget.TextView;


public class CheckboxAdapter extends ArrayAdapter<String> {
    private LayoutInflater mInflater;

    private String[] mStrings;
    private TypedArray mIcons;
    private int mViewResourceId;

    public CheckboxAdapter(Context ctx,int viewResourceId,String[] strings){
        super(ctx,viewResourceId,strings);

        mInflater = (LayoutInflater)ctx.getSystemService(Context.LAYOUT_INFLATER_SERVICE);

        mStrings = strings;

        mViewResourceId = viewResourceId;
    }

    public int getCount(){
        return mStrings.length;
    }

    public String getItem(int position){
        return mStrings[position];
    }

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

    public View getView(int position,View convertView,ViewGroup parent){
        convertView = mInflater.inflate(mViewResourceId, null);

        CheckBox tv = (CheckBox)convertView.findViewById(R.id.checkBox1);
        tv.setText(mStrings[position]);

        return convertView;
    }
}

这是我的 mainActivity 类

and this is my mainActivity class

package com.wasiff.listview;

import android.app.ListActivity;
import android.content.Context;
import android.content.res.Resources;
import android.content.res.TypedArray;
import android.os.Bundle;
import android.view.Menu;
import android.view.View;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.Button;
import android.widget.ListAdapter;
import android.widget.ListView;

public class MainActivity extends ListActivity {
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        Context ctx = getApplicationContext();
        Resources res = ctx.getResources();

        String[] options = res.getStringArray(R.array.countrynames);

        setListAdapter((ListAdapter) new CheckboxAdapter(ctx,R.layout.main_list_item,options));

    }



    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.main, menu);
        return true;
    }

}

最后我将所有国家/地区保存在 values 文件夹中的 countries.xml 文件中

and finally i have all the countries saved in a countries.xml file on values folder

<?xml version="1.0" encoding="utf-8"?>
<resources>
    <string-array name="countrynames" translatable="false">
        <item>Bhutan</item>
        <item>Colombia</item>
        <item>India</item>
        <item>Pakistan</item>
        <item>Australia</item>
        <item>Srilanka</item>
        <item>England</item>
    </string-array>
</resources>

它显示了 listView 中的复选框，现在我想要的是获取复选框的文本，这些文本被选中并在单击按钮时显示在吐司中(测试)我按照 oreilly 的 android 食谱教程进行操作，但仍然我不知道如何设置监听器

it shows the check boxes in the listView now what i want is to get the text of the checkboxes which are checked and show in a toast on a button click(to test) i followed the tutorial on android cookbook by oreilly but still i dont know how to set the listener

推荐答案

在CheckboxAdapter.java里面添加

Add inside CheckboxAdapter.java

ArrayList<String> selectedStrings = new ArrayList<String>();

然后在 getView 方法中

Then inside getView method

tv.setOnCheckedChangeListener(new OnCheckedChangeListener() {

            @Override
            public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
                if (isChecked) {
                    selectedStrings.add(tv.getText().toString());
                }else{
                    selectedStrings.remove(tv.getText().toString());
                }

            }
        });

编写一个返回 selectedStrings 的 getter

Write a getter which will return selectedStrings

ArrayList<String> getSelectedString(){
  return selectedStrings;
}

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