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我使用.xml視圖的onClick方法來捕獲我的.java類上的點擊事件。android:onClick =「」導致IllegalStateException
通常運行良好。但是,當我的活動是在後臺運行了很長時間,後來來到主線程和有人點擊返回以下異常的看法:
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)
這裏我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" />
而且這裏是我的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;
}
我做錯了什麼?
'ToggleButton near =(ToggleButton)getView()。findViewById(R.id.fragment_main_colonies_tbNear);'爲什麼getView? – Raghunandan
@Raghunandan因爲它是一個片段。 – Karakuri
然後'公共無效onClickToggleColonyFollow(視圖視圖)'必須在活動不片段 – Raghunandan