我可以点击我的按钮。我想获得特定视图按钮的位置或ID并传递意图。请帮忙吗？我的列表视图数据是从网址解析的。
BaseAdapter类 //我如何获得按钮位置和火力意图
public class ListAdapter extends BaseAdapter{
LayoutInflater inflater;
Context context;
ArrayList<HashMap<String, String>> contactList= new ArrayList<HashMap<String, String>>();
public ListAdapter(Context context) {
this.context=context;
inflater = (LayoutInflater) context.getSystemService(context.LAYOUT_INFLATER_SERVICE);
}
@Override
public int getCount() {
return 0;
}
@Override
public Object getItem(int i) {
return null;
}
@Override
public long getItemId(int i) {
return 0;
}
@Override
public View getView(final int i, View view, final ViewGroup viewGroup) {
ViewHolder holder;
if(view == null) {
// Inflate and initialize your layout
view = inflater.inflate(R.layout.list, viewGroup, false);
holder = new ViewHolder();
holder.addsql = (Button) view.findViewById(R.id.addsql);
holder.addsql.setTag(new Integer(i));
// etc, etc...
view.setTag(holder);
}
else {
holder = (ViewHolder) view.getTag();
}
holder.addsql.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Log.d("position is" , ""+view.getTag());
//Integer i = (Integer)view.getTag();
Toast.makeText(view.getContext(), "helllllo", Toast.LENGTH_SHORT).show();
}
});
return view;
}
}
class ViewHolder {
TextView date;
TextView title;
TextView price;
Button addsql;
Button button;
int position;
}
//这是两个按钮，我设置意图移动另一个活动。 xml文件
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="match_parent"
android:layout_height="match_parent">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceLarge"
android:text=""
android:id="@+id/date"
android:layout_gravity="center_horizontal" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceLarge"
android:id="@+id/title"
android:layout_gravity="center_horizontal" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceLarge"
android:text=""
android:id="@+id/price"
android:layout_gravity="center_horizontal" />
<Button
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="ADD SQL"
android:id="@+id/addsql"
android:focusable="false"
android:layout_gravity="center_horizontal" />
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="New Button"
android:id="@+id/button"
android:layout_gravity="center_horizontal" />
</LinearLayout>
//在此活动中，我通过JSON解析来自网址的数据。
_MainActivity.java_
public class MainActivity extends Activity {
private ProgressDialog pDialog;
// URL to get contacts JSON
private static String url = "http://www.goteso.com/projects/dinvinguide/api/get_magazines.php";
// JSON Node names
private static final String ID = "id";
private static final String MID = "magazine_id";
private static final String Date="date";
private static final String Title= "title";
private static final String CoverPic = "cover_pic";
private static final String Price= "price";
private static final String Description = "description";
private static final String Halfpdf = "light_pdf";
private static final String Fullpdf = "full_pdf";
private static final String Ios = "ios_app_purchase_id";
private static final String Aos = "android_purchase_id";
// contacts JSONArray
JSONArray contact ;
ListView lv;
Button addsql;
ListAdapter list;
//Context con;
// Hashmap for ListView
ArrayList<HashMap<String, String>> contactList;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
contactList=new ArrayList<HashMap<String,String>>();
lv=(ListView)findViewById(R.id.listView);
list = new com.example.gurcharan.jsondemoo.ListAdapter(this);
// Calling async task to get json
new GetContacts().execute();
}
/**
* Async task class to get json by making HTTP call
* */
private class GetContacts extends AsyncTask<Void, Void, Void> {
@Override
protected void onPreExecute() {
super.onPreExecute();
// Showing progress dialog
pDialog = new ProgressDialog(MainActivity.this);
pDialog.setMessage("Please wait...");
pDialog.setCancelable(false);
pDialog.show();
}
@Override
protected Void doInBackground(Void... arg0) {
// Creating service handler class instance
ServiceHandler sh = new ServiceHandler();
// Making a request to url and getting response
String jsonStr = sh.makeServiceCall(url, ServiceHandler.GET);
Log.d("Response: ", "> " + jsonStr);
if (jsonStr != null) {
try {
contact=new JSONArray(jsonStr);
//JSONObject jsonObj = new JSONObject(jsonStr);
// Getting JSON Array node
// String contacts = jsonObj.getJSONArray(TAG_CONTACTS);
String str=contact.getString(0);
// looping through All Contacts
for (int i = 0; i < contact.length(); i++) {
JSONObject c = contact.getJSONObject(i);
String id = c.getString(ID);
String date = c.getString(Date);
String title = c.getString(Title);
String cover_pic = c.getString(CoverPic);
String price = c.getString(Price);
String description = c.getString(Description);
String light_pdf = c.getString(Halfpdf);
String full_pdf = c.getString(Fullpdf);
String ios_app_purchase_id = c.getString(Ios);
String android_purchase_id = c.getString(Aos);
// tmp hashmap for single contact
HashMap<String, String> contact = new HashMap<String, String>();
// adding each child node to HashMap key => value
contact.put(Date, date);
contact.put(Title, title);
contact.put(Price, price);
//contact.put(CoverPic, cover_pic);
// adding contact to contact list
contactList.add(contact);
}
} catch (JSONException e) {
e.printStackTrace();
}
} else {
Log.e("ServiceHandler", "Couldn't get any data from the url");
}
return null;
}
@Override
protected void onPostExecute(Void result) {
super.onPostExecute(result);
// Dismiss the progress dialog
if (pDialog.isShowing())
pDialog.dismiss();
/**
* Updating parsed JSON data into ListView
*
* */
ListAdapter adapter = new SimpleAdapter(
MainActivity.this, contactList,
R.layout.list, new String[] { Date, Title,
Price }, new int[] { R.id.date,
R.id.title, R.id.price });
lv.setAdapter(adapter);
}
}
}
//此处列表视图已设置 _main_activity.xml _
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context="com.example.gurcharan.jsondemoo.MainActivity">
<ListView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/listView"
android:layout_centerVertical="true"
android:layout_centerHorizontal="true" />
</RelativeLayout>
答案 0 :(得分：0)
在适配器中添加此类：
private class OnButtonClick implements View.OnClickListener {
/**
* @param pos it is your current position
*/
int pos;
public OnButtonClick(int pos) {
this.pos = pos;
}
@Override
public void onClick(View view) {
// intent from here
}
}
然后定义按钮点击事件，如下所示：
holder.yourbutton.setOnClickListener(new OnButtonClick());
答案 1 :(得分：0)
我们可以在BaseAdapter中使用ViewHolder类而不使用SimpleAdapter。我们必须使用我们定义的适配器来扩展类