我看了很多类似的问题,似乎没有任何工作.我有一个这样的功能的主类,编辑显示一个对话框,然后编辑一个按钮时的列表.
public class EditPlayers extends SherlockFragmentActivity {
listPlayerNames.setAdapter(new EditPlayerAdapter(ctx,R.layout.score_row_edit_player,listscoreEdit));
public void deletePlayer(final int position) {
AlertDialog.Builder alertDialog = new AlertDialog.Builder(
EditPlayers.this);
// Setting Dialog Title
alertDialog.setTitle("Delete Player");
// Setting Dialog Message
alertDialog.setMessage("Are you sure?");
// Setting Delete Button
alertDialog.setPositiveButton("Delete",new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog,int which) {
listscoreEdit.remove(position);
updateListView();
}
});
// Setting Cancel Button
alertDialog.setNeutralButton("Cancel",int which) {
dialog.cancel();
}
});
// Showing Alert Message
alertDialog.show();
}
}
如何从适配器中的getView()访问该函数？这是这行的XML
<TextView
android:id="@+id/nameEdit"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:paddingBottom="10dp"
android:paddingTop="10dp"
android:paddingLeft="10dp"
android:layout_weight="70"
android:text="Name"
android:textColor="#666666"
android:textSize="22sp"
android:textStyle="bold" >
</TextView>
<Button
android:id="@+id/deletePlayer"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="30"
android:text="Delete"
android:focusable="false" />
这是getView()
@Override
public View getView(final int position,View convertView,ViewGroup parent) {
convertView = (LinearLayout) inflater.inflate(resource,null);
score score = getItem(position);
TextView txtName = (TextView) convertView.findViewById(R.id.nameEdit);
txtName.setText(score.getName());
Button b = (Button)convertView.findViewById(R.id.deletePlayer);
b.setTag(position);
b.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
//call function here
}
});
return convertView;
}
我完全失去了这一点,所以任何帮助将不胜感激.谢谢！
解决方法
我建议您提供一个返回到您的活动的界面,让它知道按下该按钮.我不建议从ArrayAdapter调用活动的方法.它太紧耦合了.
尝试这样的东西：
你的活动
public class EditPlayers extends SherlockFragmentActivity implements EditPlayerAdapterCallback {
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
EditPlayerAdapter adapter = new EditPlayerAdapter(this,listscoreEdit);
adapter.setCallback(this);
listPlayerNames.setAdapter(adapter);
}
private void deletePlayer(final int position) {
AlertDialog.Builder alertDialog = new AlertDialog.Builder(
EditPlayers.this);
// Setting Dialog Title
alertDialog.setTitle("Delete Player");
// Setting Dialog Message
alertDialog.setMessage("Are you sure?");
// Setting Delete Button
alertDialog.setPositiveButton("Delete",new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog,int which) {
listscoreEdit.remove(position);
updateListView();
}
});
// Setting Cancel Button
alertDialog.setNeutralButton("Cancel",int which) {
dialog.cancel();
}
});
// Showing Alert Message
alertDialog.show();
}
@Override
public void deletePressed(int position) {
deletePlayer(position);
}
}
适配器：
public class EditPlayerAdapter extends ArrayAdapter {
private EditPlayerAdapterCallback callback;
@Override
public View getView(final int position,ViewGroup parent) {
convertView = (LinearLayout) inflater.inflate(resource,null);
score score = getItem(position);
TextView txtName = (TextView) convertView.findViewById(R.id.nameEdit);
txtName.setText(score.getName());
Button b = (Button)convertView.findViewById(R.id.deletePlayer);
b.setTag(position);
b.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
if(callback != null) {
callback.deletePressed(position);
}
}
});
return convertView;
}
public void setCallback(EditPlayerAdapterCallback callback){
this.callback = callback;
}
public interface EditPlayerAdapterCallback {
public void deletePressed(int position);
}
}
