我在应用程序中创建了一个自定义对话框,我想添加按钮单击可观察对象,如下所示:
public class BasicDialog extends android.app.Dialog {
@BindView(R.id.button1)
TextView button1;
@BindView(R.id.button2)
TextView button2;
public BasicDialog(Context context) {
super(context);
}
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.dialog_basic);
...
ButterKnife.bind(this);
}
public Observable<Object> button1Clicks() {
return RxView.clicks(button1);
}
public Observable<Object> button2Clicks() {
return RxView.clicks(button2);
}
}
然后,我创建我的对话框并订阅按钮1,单击我的 Activity ,如下所示:
@Override
protected void onCreate(Bundle savedInstanceState) {
...
BasicDialog basicDialog = new BasicDialog(this);
basicDialog.button1Clicks()
.subscribe(__ -> doStuff());
}
这将导致空指针异常,因为
button1
在预订时为空。我知道可能的解决方法是在对话框中使用
PublishSubject
,而不是尝试直接订阅可观察到的按钮单击,但这似乎是一个非常微妙的解决方案。在此先感谢您的任何建议!
最佳答案
问题是,您订购按钮单击的时间过早。 @Override protected void onCreate(Bundle savedInstanceState) { ... BasicDialog basicDialog = new BasicDialog(this); // `basicDialog` hasn't yet been created, it has no view hierarchy inflated yet // Force create the dialog basicDialog.create(); // Now you have your dialog created basicDialog.button1Clicks() .subscribe(__ -> doStuff()); }