如何实现OnClickListener的ListView控件 [英] How to implement onclicklistener for listView

问题描述

我有一个第二活动它调用（ImageAndTextAdapter）来显示一个ListView活动（MainActivity）。
我希望能够点击每个列表项，打开一个新的活动。不过，我不知道如何正确地贯彻setOnItemClickListener功能。我已经尝试了许多不同的方式。任何帮助将AP preciated。

MainActivity：

 公共类MainActivity扩展ListActivity {@覆盖
公共无效的onCreate（捆绑savedInstanceState）{
    super.onCreate（savedInstanceState）;
    的setContentView（R.layout.main）;    上下文CTX = getApplicationContext（）;
资源解析度= ctx.getResources（）;的String []选项= res.getStringArray（R.array.country_names）;
TypedArray图标= res.obtainTypedArray（R.array.country_icons）;setListAdapter（新ImageAndTextAdapter（CTX，R.layout.main_list_item，选项图标））;
}@覆盖
公共布尔onCreateOptionsMenu（菜单菜单）{
    //充气菜单;如果是present这增加了项目操作栏。
    。getMenuInflater（）膨胀（R.menu.main，菜单）;
    返回true;}
    }
 

ImageAndTextAdapter.java：

 公共类ImageAndTextAdapter扩展ArrayAdapter＆LT;串GT; {私人LayoutInflater mInflater;私有String [] mStrings;
私人TypedArray mIcons;私人诠释mViewResourceId;公共ImageAndTextAdapter（上下文CTX，诠释viewResourceId，
    的String []字符串，TypedArray图标）{
超（CTX，viewResourceId，字符串）;mInflater =（LayoutInflater）ctx.getSystemService（
        Context.LAYOUT_INFLATER_SERVICE）;mStrings =串;
mIcons =图标;mViewResourceId = viewResourceId;
}@覆盖
公众诠释的getCount（）{
返回mStrings.length;
}@覆盖
公共字符串的getItem（INT位置）{
返回mStrings [位置]
}@覆盖
众长getItemId（INT位置）{
返回的位置;
}@覆盖
公共查看getView（INT位置，查看convertView，父母的ViewGroup）{
convertView = mInflater.inflate（mViewResourceId，NULL）;ImageView的IV =（ImageView的）convertView.findViewById（R.id.option_icon）;
iv.setImageDrawable（mIcons.getDrawable（位置））;TextView的电视=（TextView中）convertView.findViewById（R.id.option_text）;
tv.setText（mStrings [位置]）;返回convertView;
}
}
 

XML文件：

 ＆LT;资源＆GT;
＆LT;字符串数组名=country_names＆GT;
    ＆LT;项目＆GT;哥伦比亚＆LT; /项目＆GT;
    ＆LT;项目＆GT;秘鲁＆LT; /项目＆GT;
    ＆LT;项目＆GT;阿根廷＆LT; /项目＆GT;
 ＆LT; /字符串数组＆GT;
＆LT;数组名=country_icons＆GT;
    ＆LT;项目＆GT; @绘制/哥伦比亚＆LT; /项目＆GT;
    ＆LT;项目＆GT; @绘制/秘鲁＆LT; /项目＆GT;
    ＆LT;项目＆GT; @绘制/阿根廷＆LT; /项目＆GT;
＆LT; /阵列＆GT;
＆LT; /资源＆GT;
 

解决方案

在你onCreate（）方法，在 setListAdapter（新ImageAndTextAdapter（CTX，R.layout.main_list_item，选项图标））; ，使用：

  getListView（）。setOnItemClickListener（新OnItemClickListener（）{    @覆盖
    公共无效onItemClick（适配器视图＆LT;＆GT;母公司，观景，INT位置，
            长ID）{
        //处理您的请点击这里，只要你想    }
}）;
 

I have an activity (MainActivity) which calls on a 2nd Activity (ImageAndTextAdapter) to display a listview. I want to be able to click on each list item to open a new activity. However I do not know how to implement the setOnItemClickListener function correctly. I have tried many different ways. Any help will be appreciated.

MainActivity:

public class MainActivity extends ListActivity {

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);

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

String[] options = res.getStringArray(R.array.country_names);
TypedArray icons = res.obtainTypedArray(R.array.country_icons);

setListAdapter(new ImageAndTextAdapter(ctx, R.layout.main_list_item, options, icons));
}

@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;}


    }

ImageAndTextAdapter.java:

public class ImageAndTextAdapter extends ArrayAdapter<String> {

private LayoutInflater mInflater;

private String[] mStrings;
private TypedArray mIcons;

private int mViewResourceId;

public ImageAndTextAdapter(Context ctx, int viewResourceId,
    String[] strings, TypedArray icons) {
super(ctx, viewResourceId, strings);

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

mStrings = strings;
mIcons = icons;

mViewResourceId = viewResourceId;
}

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

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

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

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

ImageView iv = (ImageView)convertView.findViewById(R.id.option_icon);
iv.setImageDrawable(mIcons.getDrawable(position));

TextView tv = (TextView)convertView.findViewById(R.id.option_text);
tv.setText(mStrings[position]);

return convertView;
}
}

XML File:

<resources>
<string-array name="country_names">
    <item>Columbia</item>
    <item>Peru</item>
    <item>Argentina</item>
 </string-array>
<array name="country_icons">
    <item>@drawable/Columbia</item>
    <item>@drawable/Peru</item>
    <item>@drawable/Argentina</item>
</array>
</resources>

解决方案

In your onCreate() method, after setListAdapter(new ImageAndTextAdapter(ctx, R.layout.main_list_item, options, icons));, use:

getListView().setOnItemClickListener(new OnItemClickListener() {

    @Override
    public void onItemClick(AdapterView<?> parent, View view, int position,
            long id) {
        // Handle your click here as you want

    }
});

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