Toast类型中的方法makeText（Context，CharSequence，int）不适用于参数（Class <readcontactsactivity>，String，int）</readcontactsactivity>

Question

我在onPostExecute(Boolean result)方法中使用toast.Here是它的代码

@Override
protected void onPostExecute(Boolean result) {
    //objAdapter = new listAdapter(ReadContactsActivity.this, items);
    //listView.setAdapter(objAdapter);
    dialog.dismiss();
    if(result)
        Toast.makeText(this, "Email was sent successfully.", Toast.LENGTH_LONG).show();
    else
        Toast.makeText(this, "Email was not sent.", Toast.LENGTH_LONG).show();
    }   

}

我收到错误“Toast类型中的方法makeText(Context, CharSequence, int)不适用于参数(Class<ReadContactsActivity>, String, int)”

Answer 1

用于显示Toast使用以下代码。

   @Override
protected void onPostExecute(Boolean result) {
    //objAdapter = new listAdapter(ReadContactsActivity.this, items);
    //listView.setAdapter(objAdapter);
    dialog.dismiss();
    if(result)
        Toast.makeText(Yourclassname.this, "Email was sent successfully.", Toast.LENGTH_LONG).show();
    else
        Toast.makeText(Yourclassname.this, "Email was not sent.", Toast.LENGTH_LONG).show();
    }   

}