Android的FragmentTransaction承诺已经调用 [英] Android FragmentTransaction commit already called

问题描述

我的错误：

java.lang.IllegalStateException：已提交名为

我的code：

 最后FragmentTransaction fragmentTransaction = getFragmentManager（）调用BeginTransaction（）。f1_fragment =新F1_Fragments（）;
f2_fragment =新F2_Fragments（）;listView.setOnItemClickListener（新AdapterView.OnItemClickListener（）{
    @覆盖
    公共无效onItemClick（适配器视图＆LT;＆GT;母公司，观景，INT位置，长的id）{
            parent.getItemAtPosition（位置）;            如果（位置== 0）{
                fragmentTransaction.replace（android.R.id.content，f1_fragment）;
            }其他{
                fragmentTransaction.replace（android.R.id.content，f2_fragment）;
            }            fragmentTransaction.addToBackStack（NULL）;
            fragmentTransaction.commit（）;
        }
    }）;
 

解决方案

您已经开始的 OnItemClickListener 外FragmentTransaction。因此，你正试图每次用户在你的ListView点击一个项目的时间提交（）单FragmentTransaction。

您需要在每次开始一个新FragmentTransaction你打算执行任意数量的片段操作。

一个简单的修复是这样的：

  f1_fragment =新F1_Fragments（）;
f2_fragment =新F2_Fragments（）;listView.setOnItemClickListener（新AdapterView.OnItemClickListener（）{    @覆盖
    公共无效onItemClick（适配器视图＆LT;＆GT;母公司，观景，INT位置，长的id）{
        FragmentTransaction fragmentTransaction = getFragmentManager（）调用BeginTransaction（）。        parent.getItemAtPosition（位置）;        如果（位置== 0）{
            fragmentTransaction.replace（android.R.id.content，f1_fragment）;
        }其他{
            fragmentTransaction.replace（android.R.id.content，f2_fragment）;
        }        fragmentTransaction.addToBackStack（NULL）;
        fragmentTransaction.commit（）;
    }
}）;
 

My ERROR :

java.lang.IllegalStateException: commit already called

My CODE:

final FragmentTransaction fragmentTransaction =getFragmentManager().beginTransaction();

f1_fragment  = new F1_Fragments();
f2_fragment = new F2_Fragments();

listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
    @Override
    public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
            parent.getItemAtPosition(position);

            if(position==0){
                fragmentTransaction.replace(android.R.id.content, f1_fragment);
            }else{
                fragmentTransaction.replace(android.R.id.content, f2_fragment);
            }

            fragmentTransaction.addToBackStack(null);
            fragmentTransaction.commit();
        }
    });

解决方案

You are beginning the FragmentTransaction outside of the OnItemClickListener. Thus you are attempting to commit() a single FragmentTransaction every time the user clicks an item in your ListView.

You need to begin a new FragmentTransaction every time you intend to perform any number of Fragment operations.

A simple fix would look like this:

f1_fragment  = new F1_Fragments();
f2_fragment = new F2_Fragments();

listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {

    @Override
    public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
        FragmentTransaction fragmentTransaction =getFragmentManager().beginTransaction();

        parent.getItemAtPosition(position);

        if(position==0){
            fragmentTransaction.replace(android.R.id.content, f1_fragment);
        }else{
            fragmentTransaction.replace(android.R.id.content, f2_fragment);
        }

        fragmentTransaction.addToBackStack(null);
        fragmentTransaction.commit();
    }
});

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