本文介绍了如何实现OnClickListener的ListView控件的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!

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<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:

 <资源>
<字符串数组名=country_names>
    <项目>哥伦比亚< /项目>
    <项目>秘鲁< /项目>
    <项目>阿根廷< /项目>
 < /字符串数组>
<数组名=country_icons>
    <项目> @绘制/哥伦比亚< /项目>
    <项目> @绘制/秘鲁< /项目>
    <项目> @绘制/阿根廷< /项目>
< /阵列>
< /资源>


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<>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

    }
});

这篇关于如何实现OnClickListener的ListView控件的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持!

09-16 04:42