我正在使用 AlertDialog.Builder 构建我的对话框,它有一个需要填充的 EditText,我想防止在对话框未关闭时关闭它。在肯定按钮的 onClickListener 中,我可以检查 editText 是否已填充,但我不知道如何防止关闭...
builder.setPositiveButton("title", new DialogInterface.OnClickListener(){
@Override
public void onClick(DialogInterface dialog, int which) {
if(...){
//can close
}else{
//prevent closing
}
}
})
最佳答案
您可以在调用对话框的 show()
后立即更改按钮的行为,如下所示。
AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());
builder.setMessage("Test for preventing dialog close");
builder.setPositiveButton("Test",
new DialogInterface.OnClickListener()
{
@Override
public void onClick(DialogInterface dialog, int which)
{
//Do nothing here because we override this button later to change the close behaviour.
//However, we still need this because on older versions of Android unless we
//pass a handler the button doesn't get instantiated
}
});
AlertDialog dialog = builder.create();
dialog.show();
//Overriding the handler immediately after show is probably a better approach than OnShowListener as described below
dialog.getButton(AlertDialog.BUTTON_POSITIVE).setOnClickListener(new View.OnClickListener()
{
@Override
public void onClick(View v)
{
Boolean wantToCloseDialog = false;
//Do stuff, possibly set wantToCloseDialog to true then...
if(wantToCloseDialog)
dialog.dismiss();
//else dialog stays open. Make sure you have an obvious way to close the dialog especially if you set cancellable to false.
}
});
关于android - 如何防止 AlertDialog 关闭?,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/27345584/