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我使用.xml视图的onClick方法来捕获我的.java类上的点击事件。android:onClick =“”导致IllegalStateException
通常运行良好。但是,当我的活动是在后台运行了很长时间,后来来到主线程和有人点击返回以下异常的看法:
java.lang.NullPointerException
java.lang.IllegalStateException: Could not execute method of the activity
at android.view.View$1.onClick(View.java:3608)
at android.view.View.performClick(View.java:4101)
at android.view.View$PerformClick.run(View.java:17087)
at android.os.Handler.handleCallback(Handler.java:615)
at android.os.Handler.dispatchMessage(Handler.java:92)
这里我view.xml用:
<ToggleButton
android:id="@+id/fragment_main_colonies_tbFollow"
android:layout_width="match_parent"
android:layout_height="40dp"
android:checked="false"
android:onClick="onClickToggleColonyFollow"
android:textOff="@string/main_colony_follow"
android:textOn="@string/main_colony_follow" />
而且这里是我的fragment.java:
public void onClickToggleColonyFollow(View view) {
ToggleButton near = (ToggleButton)getView().findViewById(R.id.fragment_main_colonies_tbNear);
ToggleButton follow = (ToggleButton) view;
if(follow == null || near == null) return;
if(!near.isChecked() && !follow.isChecked()) {
follow.setChecked(true);
return;
}
near.setChecked(false);
showColoniesNear = false;
}
我做错了什么?
'ToggleButton near =(ToggleButton)getView()。findViewById(R.id.fragment_main_colonies_tbNear);'为什么getView? – Raghunandan
@Raghunandan因为它是一个片段。 – Karakuri
然后'公共无效onClickToggleColonyFollow(视图视图)'必须在活动不片段 – Raghunandan