Android 在BaseAdapter扩展类中创建警报对话框
我有一个MyListAdapter Java类,如下所示:Android 在BaseAdapter扩展类中创建警报对话框,android,android-alertdialog,baseadapter,appcompatactivity,Android,Android Alertdialog,Baseadapter,Appcompatactivity,我有一个MyListAdapter Java类,如下所示: class MyListAdapter extends BaseAdapter implements TextToSpeech.OnInitListener{ btnDelete.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View view) { AlertD
class MyListAdapter extends BaseAdapter implements TextToSpeech.OnInitListener{
btnDelete.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
AlertDialog.Builder alert = new AlertDialog.Builder(this);
alert.setTitle("Delete");
alert.setMessage("Are you sure?");
alert.setPositiveButton(android.R.string.yes,
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
// continue with delete
new DatabaseHelper(context).deleteEmployee(employees.get(position));
employees.remove(position);
notifyDataSetChanged();
}
});
现在,我想对每个列表项进行确认对话,如下所示:
class MyListAdapter extends BaseAdapter implements TextToSpeech.OnInitListener{
btnDelete.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
AlertDialog.Builder alert = new AlertDialog.Builder(this);
alert.setTitle("Delete");
alert.setMessage("Are you sure?");
alert.setPositiveButton(android.R.string.yes,
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
// continue with delete
new DatabaseHelper(context).deleteEmployee(employees.get(position));
employees.remove(position);
notifyDataSetChanged();
}
});
但是
AlertDialog.Builder alert = new AlertDialog.Builder(this);
我有一个错误,它说:
builder (android.content.Context) in Builder cannot be applied to (anonymous android.view.View.OnClickListner)
当我的类从AppCompatActivity扩展时,我没有任何问题。问题是您试图将此作为上下文传递,但它指向您的
视图。OnClickListener
替换:
AlertDialog.Builder alert = new AlertDialog.Builder(this);
与:
你展示对话的活动名称是什么?有谁能解释一下为什么要投反对票吗???!!!