Android Studio-错误：提交已调用[duplicate]

Question

此问题已经在这里有了答案：

Android FragmentTransaction commit already called （7个答案）

[<3个月前关闭。

我遇到此错误：

java.lang.IllegalStateException: commit already called
    at androidx.fragment.app.BackStackRecord.commitInternal(BackStackRecord.java:669)
    at androidx.fragment.app.BackStackRecord.commit(BackStackRecord.java:637)
    at com.example.ui.PACK.SUBPACK.subpack$4.onClick(subpack.java:94)
    at android.view.View.performClick(View.java:6600)
    at android.view.View.performClickInternal(View.java:6577)
    at android.view.View.access$3100(View.java:781)
    at android.view.View$PerformClick.run(View.java:25912)
    at android.os.Handler.handleCallback(Handler.java:873)
    at android.os.Handler.dispatchMessage(Handler.java:99)
    at android.os.Looper.loop(Looper.java:193)
    at android.app.ActivityThread.main(ActivityThread.java:6923)
    at java.lang.reflect.Method.invoke(Native Method)
    at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:493)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:870)

这是我的JAVA代码：
public class subpack extends Fragment {

private FragmentTransaction ft;

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,Bundle savedInstanceState) {
    View view = inflater.inflate(R.layout.fragment_subpack, container, false);

ft = getFragmentManager().beginTransaction();

//TXT LUNES EVENT LISTENER
    txt_lunes.setOnClickListener(new View.OnClickListener(){
        @Override
        public void onClick(View v){  
            fragment = new lunes_gestionar();
            ft.replace(R.id.fragment,fragment).setTransition(FragmentTransaction.TRANSIT_FRAGMENT_OPEN).commit();
        }
    });

    //TXT MARTES EVENT LISTENER
    txt_martes.setOnClickListener(new View.OnClickListener(){
        @Override
        public void onClick(View v){
            fragment = new martes_gestionar();
            ft.replace(R.id.fragment,fragment).setTransition(FragmentTransaction.TRANSIT_FRAGMENT_OPEN).commit();
        }
    });

描述：
我有一个带有另一个片段的片段，在其中TEXT VIEWS（星期一，星期二）用于通过
Fragment Transaction更改片段。问题是当我第二次单击此文本视图时。我该如何解决？
非常感谢您阅读！    

Answer 1

Answer 2