java - fragment 未完全膨胀

Question

我创建了一个具有三个选项卡的 Activity 。单击选项卡 1 时，它会打开一个包含两个按钮的 fragment (TaskFragment)，每个按钮都有一个关联的文本。

当我单击“创建评估报告”按钮时，它会正确地膨胀另一个 fragment (AppraisalReportFragment) 的两个文本行(现在取代前两个文本行)和页面标题(评估报告)，但两个初始按钮仍保留在原位。

我试图将初始 fragment 上的所有内容更改为全新的 fragment ，具有自己的按钮和文本)，但现在只发生了其中的一些更改。

任务 fragment

package usjersey.com.jerseyscore.fragments;

import android.content.Intent;
import android.support.v4.app.Fragment;
import android.os.Bundle;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentTransaction;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.RelativeLayout;

import usjersey.com.jerseyscore.R;

/**
 * Created by dhiggins on 11/20/2017.
 */

public class TasksFragment extends Fragment {
    private static final String TAG = "TasksFragment";

    Intent intent;
    private RelativeLayout layoutToAdd;


//    public void onCreate (Bundle savedInstanceState) {
    // super.onCreate(savedInstanceState);
    //}

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {

        View rootView = inflater.inflate(R.layout.fragment_tasks, container, false);
        //View rootView = inflater.inflate(R.layout.fragment_tasks, null);
        //layoutToAdd = (RelativeLayout) findViewById(R.id.TaskFragment);

        Button ID = (Button) rootView.findViewById(R.id.btn_create_appraisal_rpt);
        ID.setOnClickListener(new View.OnClickListener() {

            @Override
            public void onClick(View view) {
                AppraisalReportFragment appraisalRptAct = new AppraisalReportFragment();

                FragmentManager fragmentManager = getFragmentManager();
                FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();


                //fragmentTransaction.setTransition(fragmentTransaction.TRANSIT_FRAGMENT_OPEN);
                fragmentTransaction.addToBackStack(null);

                //Fragment newFragment = new AppCompatDialogFragment();
                //FragmentTransaction transaction = getFragmentManager().beginTransaction();
                fragmentTransaction.replace(R.id.tasks_page_fragment, appraisalRptAct);

                //transaction.replace(R.id.child_fragment, newFragment);
                fragmentTransaction.commit();
            }
        });

        Button ID2 = (Button) rootView.findViewById(R.id.btn_check_in_for_today);
        ID2.setOnClickListener(new View.OnClickListener() {

            @Override
            public void onClick(View view) {
                TasksFragment checkInForToday = new TasksFragment();

                FragmentManager fragmentManager = getFragmentManager();
                FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();
                fragmentTransaction.replace(R.id.herds_check_in_for_today_fragment4, checkInForToday);

                //fragmentTransaction.setTransition(fragmentTransaction.TRANSIT_FRAGMENT_OPEN);
                //fragmentTransaction.addToBackStack(null);

                //Fragment newFragment = new AppCompatDialogFragment();
                //FragmentTransaction transaction = getFragmentManager().beginTransaction();

                //transaction.replace(R.id.child_fragment, newFragment);
                fragmentTransaction.commit();
            }
        });

        /*rootView.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                intent = new Intent(getActivity(), AppraisalReportActivity.class);
                final Button button = (Button) rootView.findViewById(R.id.button_create_appraisal_rpt);
            }
        });*/

        return rootView;
    }

    /*public void buttonOnClick(View v){

    }*/
}

fragment_tasks.xml

<?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:id="@+id/tasks_page_fragment"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="@android:color/black"
    android:orientation="vertical">

    <!-- First A -->
    <Button
        android:id="@+id/btn_check_in_for_today"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentStart="true"
        android:layout_alignParentTop="true"
        android:layout_marginStart="27dp"
        android:layout_marginTop="44dp"
        android:background="@android:color/black"
        android:elevation="0dp"
        android:onClick="onCreateView"
        android:text="@string/btn_check_in_for_today"
        android:textAlignment="viewStart"
        android:textColor="@android:color/white"
        android:textSize="18sp" />

    <!-- First B -->
    <Button
        android:id="@+id/btn_create_appraisal_rpt"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignStart="@+id/btn_check_in_for_today"
        android:layout_below="@+id/btn_check_in_for_today"
        android:layout_marginTop="40dp"
        android:background="@android:color/black"
        android:onClick="onCreateView"
        android:text="@string/btn_create_appraisal_report"
        android:textColor="@android:color/white"
        android:textSize="18sp" />

    <!-- First B-->
    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignStart="@+id/textView3"
        android:layout_below="@+id/btn_check_in_for_today"
        android:text="@string/tasks_check_day_score"
        android:textColor="@android:color/white"
        android:id="@+id/textView2" />

    <!-- First B-->
    <TextView
        android:id="@+id/textView3"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_below="@+id/btn_create_appraisal_rpt"
        android:layout_centerHorizontal="true"
        android:text="@string/tasks_print_email_regmail"
        android:textColor="@android:color/white" />


</RelativeLayout>


**AppraisalReportFragment**

package usjersey.com.jerseyscore.fragments;

import android.app.Activity;
//import android.app.Fragment;
import android.support.annotation.Nullable;
import android.support.v4.app.Fragment;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.TextView;

import usjersey.com.jerseyscore.R;

/**
 * Created by dhiggins on 11/29/2017.
 */

public class AppraisalReportFragment extends Fragment {
        private static final String TAG = "Appraisal Report";
        TextView textView;

        @Nullable
        @Override
        public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
                //return inflater.inflate(R.layout.fragment_information, container, false);
                View view = inflater.inflate(R.layout.fragment_appraisal_report, container, false);
                TextView output = (TextView)view.findViewById(R.id.textView3);
                //output.setText("Frag 2");
                return view;
        }
}

fragment_appraisal.xml

<?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:id="@+id/tasks_page_fragment"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="@android:color/black"
    android:orientation="vertical">

    <Button
        android:id="@+id/btn_check_in_for_today"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentStart="true"
        android:layout_below="@+id/appraisal_report"
        android:layout_marginStart="27dp"
        android:layout_marginTop="19dp"
        android:background="@android:color/black"
        android:text="@string/btn_all_cows_in_herd"
        android:textColor="@android:color/white"
        android:textSize="18sp" />

    <Button
        android:id="@+id/btn_cows_scored"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignStart="@+id/btn_check_in_for_today"
        android:layout_below="@+id/textView5"
        android:layout_marginTop="23dp"
        android:background="@android:color/black"
        android:onClick="onCreateView"
        android:text="@string/btn_cows_scored"
        android:textColor="@android:color/white"
        android:textSize="18sp" />

    <TextView
        android:id="@+id/textView5"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignStart="@+id/textView3"
        android:layout_below="@+id/btn_check_in_for_today"
        android:text="@string/label_all_cows_in_herd_report"
        android:textColor="@android:color/white" />

    <TextView
        android:id="@+id/textView3"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_below="@+id/btn_cows_scored"
        android:layout_centerHorizontal="true"
        android:text="@string/label_checked_scored_cows"
        android:textColor="@android:color/white" />

    <TextView
        android:id="@+id/appraisal_report"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentTop="true"
        android:layout_centerHorizontal="true"
        android:fontFamily="serif"
        android:text="@string/title_appraisal_reports"
        android:textAlignment="viewStart"
        android:textColor="@android:color/white"
        android:textSize="18sp"
        android:textStyle="bold" />

</RelativeLayout>

Answer 1

当您膨胀 fragment 时，在 Activity 中提交 FragmentManager 事务后，您应该将之前布局中的按钮的可见性设置为 gone

你可以这样做，然后在返回时再次将它们更改为visible

b1.setVisibility(View.GONE);
b2.setVisibility(View.GONE);

根据您的代码更改按钮的名称