片段未在适配器类中替换答案

【问题标题】：Fragment not replacing in Adapter Class片段未在适配器类中替换
【发布时间】：2018-08-05 22:19:51
【问题描述】：

我正在尝试在适配器类中的按钮单击侦听器上用另一个片段替换一个片段。编译器将转到 onClickListener 但片段没有替换。

@OnClick(R.id.ib_view)
        public void gotoTranscationDetailsFragment() {
            Toast.makeText(mParent, "Hi", Toast.LENGTH_SHORT).show();
            Fragment viewSuspendedTransactionFragment = new ViewSuspendedTransactionFragment();
            FragmentManager manager = mParent.getSupportFragmentManager();
            FragmentTransaction transaction = manager.beginTransaction();
            transaction.replace(R.id.fragment_suspend_transaction, viewSuspendedTransactionFragment);
            transaction.commit();
        }

完整代码

public class SuspendedTransactionListAdapter extends RecyclerView.Adapter<SuspendedTransactionListAdapter.SuspendedTransactionListHolder> {

    private SuspendTransactionActivity mParent;
    private List<SuspendTransactionFragment.SampleDataSuspendTransactionActivity> sampleList;
    private Fragment fragment;

    public SuspendedTransactionListAdapter(SuspendTransactionActivity mParent, List<SuspendTransactionFragment.SampleDataSuspendTransactionActivity> sampleList, Fragment fragment) {
        this.mParent = mParent;
        this.sampleList = sampleList;
        this.fragment = fragment;
    }

    @Override
    public SuspendedTransactionListHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        View itemView = LayoutInflater.from(parent.getContext()).inflate(R.layout.row_suspended_transaction_list, parent, false);
        return new SuspendedTransactionListHolder(itemView);
    }

    @Override
    public void onBindViewHolder(SuspendedTransactionListHolder holder, int position) {
        SuspendTransactionFragment.SampleDataSuspendTransactionActivity sampleDataSuspendTransactionActivity = sampleList.get(position);
        holder.mTransactionNoTextView.setText(sampleDataSuspendTransactionActivity.getTransactionNo());
    }

    @Override
    public int getItemCount() {
        return sampleList.size();
    }

    class SuspendedTransactionListHolder extends RecyclerView.ViewHolder {

        @BindView(R.id.ib_view)
        ImageButton mViewImageButton;

        public SuspendedTransactionListHolder(View view) {
            super(view);
            ButterKnife.bind(this, view);
        }

        @OnClick(R.id.ib_view)
        public void gotoTranscationDetailsFragment() {
            Toast.makeText(mParent, "Hi", Toast.LENGTH_SHORT).show();
            Fragment viewSuspendedTransactionFragment = new ViewSuspendedTransactionFragment();
            FragmentManager manager = mParent.getSupportFragmentManager();
            FragmentTransaction transaction = manager.beginTransaction();
            transaction.replace(R.id.fragment_suspend_transaction, viewSuspendedTransactionFragment);
            transaction.commit();
        }
    }

XML - 活动

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".transaction.activities.SuspendTransactionActivity">

    <fragment
        android:id="@+id/fragment_suspend_transaction"
        class="com.sahasram.siripos.fragments.SuspendTransactionFragment"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_below="@+id/actionbar"
        tools:layout="@layout/fragment_suspend_transaction" />

</RelativeLayout>

【问题讨论】：

R.id.fragment_suspend_transactiondefined 在哪里？
@Anatolii 在活动布局中我添加了<fragment>，它的id 是R.id.fragment_suspend_transaction。
你能贴出它的代码吗？还有xml？
@Anatolii 发布
只是交叉检查你的ViewSuspendedTransactionFragment是否扩展了支持库片段

标签： android android-fragments

【解决方案1】：

如果您在 xml 中使用标签 <fragment> 定义 Fragment，那么它是您的 View 层次结构的固定部分，您无法删除/替换它。如果你想替换Fragment，你应该定义一个可替换的布局（作为Fragment 的容器）。因此，您的Activity 布局可能如下：

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".transaction.activities.SuspendTransactionActivity">

    <FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
        android:id="@+id/fragment_container"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_below="@+id/actionbar" />
</RelativeLayout>

然后您可以将其替换为：

@OnClick(R.id.ib_view)
public void gotoTranscationDetailsFragment() {
    Toast.makeText(mParent, "Hi", Toast.LENGTH_SHORT).show();
    Fragment viewSuspendedTransactionFragment = new ViewSuspendedTransactionFragment();
    FragmentManager manager = mParent.getSupportFragmentManager();
    FragmentTransaction transaction = manager.beginTransaction();
    transaction.replace(R.id.fragment_container, viewSuspendedTransactionFragment);
    transaction.commit();
}

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【讨论】：