Events基本上是Activity实现的一个接口，通过点击Spinner的DropDown View的LinearLayout来接收回调。
public class MyArrayAdapter extends BaseAdapter {
String[] values;
int CustomResource;
Context context;
Events events;
public MyArrayAdapter(Context baseContext, int customspinnerview,
String[] stringArray, Events events) {
values = stringArray;
context = baseContext;
this.events = events;
CustomResource = customspinnerview;
}
@Override
public int getCount() {
// TODO Auto-generated method stub
return values.length;
}
@Override
public Object getItem(int position) {
if (position < values.length)
return values[position];
else {
return null;
}
}
@Override
public View getView(final int position, final View convertView,
ViewGroup parent) {
View rowView = convertView;
LayoutInflater inflater = (LayoutInflater) context
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
if (rowView == null) {
rowView = inflater.inflate(CustomResource, parent, false);
}
TextView textView = (TextView) rowView.findViewById(R.id.dropdown_text);
textView.setText(values[position]);
Button button = (Button) rowView.findViewById(R.id.Button_text);
return rowView;
}
@Override
public View getDropDownView(final int position, View convertView,
ViewGroup parent) {
LayoutInflater inflater = (LayoutInflater) context
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
View rowView = convertView;`enter code here`
if (rowView == null) {
rowView = inflater.inflate(CustomResource, parent, false);
}
final LinearLayout parentRelative = (LinearLayout) rowView
.findViewById(R.id.parent);
final TextView textView = (TextView) rowView
.findViewById(R.id.dropdown_text);
textView.setText(values[position]);
Button button = (Button) rowView.findViewById(R.id.Button_text);
rowView.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
events.onItemSelectedLister(
(AdapterView<?>) parentRelative.getParent(),
parentRelative, position, (long) 0);
}
});
// Button buttonView = (Button)
// rowView.findViewById(R.id.dropdown_button);
return rowView;
}
Events 接口 它是 Activity 实现的接口，用于接收来自 Adapter 的回调。
import android.view.View;
import android.widget.AdapterView;
public interface Events {
public void onItemSelectedLister(AdapterView<?> parent, View view,
int position, long id);
}
活动实施。
onItemSelected Implementation 是您可以完成任务的地方.....
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import android.annotation.TargetApi;
import android.app.Activity;
import android.os.Build;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.AdapterView;
import android.widget.Spinner;
import com.example.adapter.MyArrayAdapter;
public class MainActivity extends Activity implements Events {
Spinner spinner;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
spinner = (Spinner) findViewById(R.id.spinner);
spinner.setAdapter(new MyArrayAdapter(getBaseContext(),
R.layout.customspinnerview, getResources().getStringArray(
R.array.values), this));
}
@Override
public void onItemSelectedLister(AdapterView<?> parent, View view,
final int position, long id) {
//perform your Task.......
Method method;
try {
method = Spinner.class.getDeclaredMethod("onDetachedFromWindow");
method.setAccessible(true);
try {
method.invoke(spinner);
} catch (IllegalAccessException | IllegalArgumentException
| InvocationTargetException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
} catch (NoSuchMethodException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
spinner.post(new Runnable() {
@Override
public void run() {
spinner.setSelection(position);
spinner.setSelected(true);
((MyArrayAdapter) spinner.getAdapter()).notifyDataSetChanged();
}
});
}
}
setContentView 的活动 xml 文件
<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.customspinner.MainActivity" >
<Spinner
android:id="@+id/spinner"
android:layout_width="match_parent"
android:layout_height="wrap_content" >
</Spinner>
</RelativeLayout>
作为布局文件传递给适配器的 Spinner View。
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#99000000"
android:id="@+id/parent"
android:orientation="horizontal">
<TextView
android:id="@+id/dropdown_text"
android:layout_width="wrap_content"
android:layout_height="wrap_content"/>
<Button
android:id="@+id/Button_text"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="remove"/>
</LinearLayout>
代码运行良好 :)。我的代码运行良好。