Java 添加新片段时显示的按钮_Java_Android_Xml_Android Fragments

Java 添加新片段时显示的按钮

java android xml android-fragments

Java 添加新片段时显示的按钮,java,android,xml,android-fragments,Java,Android,Xml,Android Fragments,我将一个片段添加到另一个片段之上（片段a->片段B），但当我添加时，第一个片段中的按钮将显示出来。我不明白为什么在另一个片段上添加一个片段会显示第一个片段的内容 <TextView android:layout_width="0dp" android:layout_height="wrap_content" android:text="@string/welcome" andro

我将一个片段添加到另一个片段之上（片段a->片段B），但当我添加时，第一个片段中的按钮将显示出来。我不明白为什么在另一个片段上添加一个片段会显示第一个片段的内容

        <TextView
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:text="@string/welcome"
            android:textAppearance="@android:style/TextAppearance.Large"
            android:id="@+id/textView"
            tools:layout_constraintTop_creator="1"
            tools:layout_constraintRight_creator="1"
            android:layout_marginStart="69dp"
            android:layout_marginEnd="69dp"
            app:layout_constraintRight_toRightOf="parent"
            android:layout_marginTop="74dp"
            tools:layout_constraintLeft_creator="1"
            app:layout_constraintLeft_toLeftOf="parent"
            app:layout_constraintTop_toTopOf="parent" />

        <Button
            android:id="@+id/start_button"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:text="@string/start"
            tools:layout_constraintRight_creator="1"
            tools:layout_constraintBottom_creator="1"
            android:layout_marginStart="8dp"
            app:layout_constraintBottom_toBottomOf="parent"
            android:layout_marginEnd="8dp"
            app:layout_constraintRight_toRightOf="parent"
            tools:layout_constraintLeft_creator="1"
            android:layout_marginBottom="117dp"
            app:layout_constraintLeft_toLeftOf="parent" />

        <android.support.constraint.Guideline
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:id="@+id/guideline"
            android:orientation="vertical"
            app:layout_constraintGuide_begin="367dp"
            tools:layout_editor_absoluteY="0dp"
            tools:layout_editor_absoluteX="367dp" />

        <android.support.constraint.Guideline
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:id="@+id/guideline2"
            app:layout_constraintGuide_begin="20dp"
            android:orientation="vertical"
            tools:layout_editor_absoluteY="0dp"
            tools:layout_editor_absoluteX="20dp" />

        <android.support.constraint.Guideline
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:id="@+id/guideline3"
            app:layout_constraintGuide_begin="74dp"
            android:orientation="horizontal"
            tools:layout_editor_absoluteY="74dp"
            tools:layout_editor_absoluteX="0dp" />



</android.support.constraint.ConstraintLayout>

这里是第一个活动。它包含第一个片段（片段A）：

        <TextView
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:text="@string/welcome"
            android:textAppearance="@android:style/TextAppearance.Large"
            android:id="@+id/textView"
            tools:layout_constraintTop_creator="1"
            tools:layout_constraintRight_creator="1"
            android:layout_marginStart="69dp"
            android:layout_marginEnd="69dp"
            app:layout_constraintRight_toRightOf="parent"
            android:layout_marginTop="74dp"
            tools:layout_constraintLeft_creator="1"
            app:layout_constraintLeft_toLeftOf="parent"
            app:layout_constraintTop_toTopOf="parent" />

        <Button
            android:id="@+id/start_button"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:text="@string/start"
            tools:layout_constraintRight_creator="1"
            tools:layout_constraintBottom_creator="1"
            android:layout_marginStart="8dp"
            app:layout_constraintBottom_toBottomOf="parent"
            android:layout_marginEnd="8dp"
            app:layout_constraintRight_toRightOf="parent"
            tools:layout_constraintLeft_creator="1"
            android:layout_marginBottom="117dp"
            app:layout_constraintLeft_toLeftOf="parent" />

        <android.support.constraint.Guideline
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:id="@+id/guideline"
            android:orientation="vertical"
            app:layout_constraintGuide_begin="367dp"
            tools:layout_editor_absoluteY="0dp"
            tools:layout_editor_absoluteX="367dp" />

        <android.support.constraint.Guideline
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:id="@+id/guideline2"
            app:layout_constraintGuide_begin="20dp"
            android:orientation="vertical"
            tools:layout_editor_absoluteY="0dp"
            tools:layout_editor_absoluteX="20dp" />

        <android.support.constraint.Guideline
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:id="@+id/guideline3"
            app:layout_constraintGuide_begin="74dp"
            android:orientation="horizontal"
            tools:layout_editor_absoluteY="74dp"
            tools:layout_editor_absoluteX="0dp" />



</android.support.constraint.ConstraintLayout>

下面是片段A的代码，它调用第二个片段（片段B）：

        <TextView
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:text="@string/welcome"
            android:textAppearance="@android:style/TextAppearance.Large"
            android:id="@+id/textView"
            tools:layout_constraintTop_creator="1"
            tools:layout_constraintRight_creator="1"
            android:layout_marginStart="69dp"
            android:layout_marginEnd="69dp"
            app:layout_constraintRight_toRightOf="parent"
            android:layout_marginTop="74dp"
            tools:layout_constraintLeft_creator="1"
            app:layout_constraintLeft_toLeftOf="parent"
            app:layout_constraintTop_toTopOf="parent" />

        <Button
            android:id="@+id/start_button"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:text="@string/start"
            tools:layout_constraintRight_creator="1"
            tools:layout_constraintBottom_creator="1"
            android:layout_marginStart="8dp"
            app:layout_constraintBottom_toBottomOf="parent"
            android:layout_marginEnd="8dp"
            app:layout_constraintRight_toRightOf="parent"
            tools:layout_constraintLeft_creator="1"
            android:layout_marginBottom="117dp"
            app:layout_constraintLeft_toLeftOf="parent" />

        <android.support.constraint.Guideline
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:id="@+id/guideline"
            android:orientation="vertical"
            app:layout_constraintGuide_begin="367dp"
            tools:layout_editor_absoluteY="0dp"
            tools:layout_editor_absoluteX="367dp" />

        <android.support.constraint.Guideline
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:id="@+id/guideline2"
            app:layout_constraintGuide_begin="20dp"
            android:orientation="vertical"
            tools:layout_editor_absoluteY="0dp"
            tools:layout_editor_absoluteX="20dp" />

        <android.support.constraint.Guideline
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:id="@+id/guideline3"
            app:layout_constraintGuide_begin="74dp"
            android:orientation="horizontal"
            tools:layout_editor_absoluteY="74dp"
            tools:layout_editor_absoluteX="0dp" />



</android.support.constraint.ConstraintLayout>

下面是片段B的类：

public class MainActivityFragment extends Fragment {

        public MainActivityFragment() {
        }

        @Override
        public View onCreateView(LayoutInflater inflater, ViewGroup container,
                                 Bundle savedInstanceState) {
            return inflater.inflate(R.layout.fragment_main, container, false);
        }

        @Override
        public void onViewCreated(View view, @Nullable Bundle savedInstanceState) {
            super.onViewCreated(view, savedInstanceState);

            Button startButton = (Button) view.findViewById(R.id.start_button);
            startButton.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    GameSetupFragment newGame = new GameSetupFragment();
                    getFragmentManager().beginTransaction()
                            .addToBackStack("MainActivity")
                            .replace(R.id.fragment, newGame)
                            .commit();
                }
            });
        }

    }

public class GameSetupFragment extends Fragment {

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

        return inflater.inflate(R.layout.game_board_fragment, container, false);
    }
}

        <TextView
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:text="@string/welcome"
            android:textAppearance="@android:style/TextAppearance.Large"
            android:id="@+id/textView"
            tools:layout_constraintTop_creator="1"
            tools:layout_constraintRight_creator="1"
            android:layout_marginStart="69dp"
            android:layout_marginEnd="69dp"
            app:layout_constraintRight_toRightOf="parent"
            android:layout_marginTop="74dp"
            tools:layout_constraintLeft_creator="1"
            app:layout_constraintLeft_toLeftOf="parent"
            app:layout_constraintTop_toTopOf="parent" />

        <Button
            android:id="@+id/start_button"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:text="@string/start"
            tools:layout_constraintRight_creator="1"
            tools:layout_constraintBottom_creator="1"
            android:layout_marginStart="8dp"
            app:layout_constraintBottom_toBottomOf="parent"
            android:layout_marginEnd="8dp"
            app:layout_constraintRight_toRightOf="parent"
            tools:layout_constraintLeft_creator="1"
            android:layout_marginBottom="117dp"
            app:layout_constraintLeft_toLeftOf="parent" />

        <android.support.constraint.Guideline
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:id="@+id/guideline"
            android:orientation="vertical"
            app:layout_constraintGuide_begin="367dp"
            tools:layout_editor_absoluteY="0dp"
            tools:layout_editor_absoluteX="367dp" />

        <android.support.constraint.Guideline
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:id="@+id/guideline2"
            app:layout_constraintGuide_begin="20dp"
            android:orientation="vertical"
            tools:layout_editor_absoluteY="0dp"
            tools:layout_editor_absoluteX="20dp" />

        <android.support.constraint.Guideline
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:id="@+id/guideline3"
            app:layout_constraintGuide_begin="74dp"
            android:orientation="horizontal"
            tools:layout_editor_absoluteY="74dp"
            tools:layout_editor_absoluteX="0dp" />



</android.support.constraint.ConstraintLayout>

以下是每种类型的xml文件：

        <TextView
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:text="@string/welcome"
            android:textAppearance="@android:style/TextAppearance.Large"
            android:id="@+id/textView"
            tools:layout_constraintTop_creator="1"
            tools:layout_constraintRight_creator="1"
            android:layout_marginStart="69dp"
            android:layout_marginEnd="69dp"
            app:layout_constraintRight_toRightOf="parent"
            android:layout_marginTop="74dp"
            tools:layout_constraintLeft_creator="1"
            app:layout_constraintLeft_toLeftOf="parent"
            app:layout_constraintTop_toTopOf="parent" />

        <Button
            android:id="@+id/start_button"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:text="@string/start"
            tools:layout_constraintRight_creator="1"
            tools:layout_constraintBottom_creator="1"
            android:layout_marginStart="8dp"
            app:layout_constraintBottom_toBottomOf="parent"
            android:layout_marginEnd="8dp"
            app:layout_constraintRight_toRightOf="parent"
            tools:layout_constraintLeft_creator="1"
            android:layout_marginBottom="117dp"
            app:layout_constraintLeft_toLeftOf="parent" />

        <android.support.constraint.Guideline
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:id="@+id/guideline"
            android:orientation="vertical"
            app:layout_constraintGuide_begin="367dp"
            tools:layout_editor_absoluteY="0dp"
            tools:layout_editor_absoluteX="367dp" />

        <android.support.constraint.Guideline
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:id="@+id/guideline2"
            app:layout_constraintGuide_begin="20dp"
            android:orientation="vertical"
            tools:layout_editor_absoluteY="0dp"
            tools:layout_editor_absoluteX="20dp" />

        <android.support.constraint.Guideline
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:id="@+id/guideline3"
            app:layout_constraintGuide_begin="74dp"
            android:orientation="horizontal"
            tools:layout_editor_absoluteY="74dp"
            tools:layout_editor_absoluteX="0dp" />



</android.support.constraint.ConstraintLayout>

Activity_Main.xml（主活动）：

        <TextView
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:text="@string/welcome"
            android:textAppearance="@android:style/TextAppearance.Large"
            android:id="@+id/textView"
            tools:layout_constraintTop_creator="1"
            tools:layout_constraintRight_creator="1"
            android:layout_marginStart="69dp"
            android:layout_marginEnd="69dp"
            app:layout_constraintRight_toRightOf="parent"
            android:layout_marginTop="74dp"
            tools:layout_constraintLeft_creator="1"
            app:layout_constraintLeft_toLeftOf="parent"
            app:layout_constraintTop_toTopOf="parent" />

        <Button
            android:id="@+id/start_button"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:text="@string/start"
            tools:layout_constraintRight_creator="1"
            tools:layout_constraintBottom_creator="1"
            android:layout_marginStart="8dp"
            app:layout_constraintBottom_toBottomOf="parent"
            android:layout_marginEnd="8dp"
            app:layout_constraintRight_toRightOf="parent"
            tools:layout_constraintLeft_creator="1"
            android:layout_marginBottom="117dp"
            app:layout_constraintLeft_toLeftOf="parent" />

        <android.support.constraint.Guideline
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:id="@+id/guideline"
            android:orientation="vertical"
            app:layout_constraintGuide_begin="367dp"
            tools:layout_editor_absoluteY="0dp"
            tools:layout_editor_absoluteX="367dp" />

        <android.support.constraint.Guideline
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:id="@+id/guideline2"
            app:layout_constraintGuide_begin="20dp"
            android:orientation="vertical"
            tools:layout_editor_absoluteY="0dp"
            tools:layout_editor_absoluteX="20dp" />

        <android.support.constraint.Guideline
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:id="@+id/guideline3"
            app:layout_constraintGuide_begin="74dp"
            android:orientation="horizontal"
            tools:layout_editor_absoluteY="74dp"
            tools:layout_editor_absoluteX="0dp" />



</android.support.constraint.ConstraintLayout>


        <TextView
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:text="@string/welcome"
            android:textAppearance="@android:style/TextAppearance.Large"
            android:id="@+id/textView"
            tools:layout_constraintTop_creator="1"
            tools:layout_constraintRight_creator="1"
            android:layout_marginStart="69dp"
            android:layout_marginEnd="69dp"
            app:layout_constraintRight_toRightOf="parent"
            android:layout_marginTop="74dp"
            tools:layout_constraintLeft_creator="1"
            app:layout_constraintLeft_toLeftOf="parent"
            app:layout_constraintTop_toTopOf="parent" />

        <Button
            android:id="@+id/start_button"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:text="@string/start"
            tools:layout_constraintRight_creator="1"
            tools:layout_constraintBottom_creator="1"
            android:layout_marginStart="8dp"
            app:layout_constraintBottom_toBottomOf="parent"
            android:layout_marginEnd="8dp"
            app:layout_constraintRight_toRightOf="parent"
            tools:layout_constraintLeft_creator="1"
            android:layout_marginBottom="117dp"
            app:layout_constraintLeft_toLeftOf="parent" />

        <android.support.constraint.Guideline
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:id="@+id/guideline"
            android:orientation="vertical"
            app:layout_constraintGuide_begin="367dp"
            tools:layout_editor_absoluteY="0dp"
            tools:layout_editor_absoluteX="367dp" />

        <android.support.constraint.Guideline
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:id="@+id/guideline2"
            app:layout_constraintGuide_begin="20dp"
            android:orientation="vertical"
            tools:layout_editor_absoluteY="0dp"
            tools:layout_editor_absoluteX="20dp" />

        <android.support.constraint.Guideline
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:id="@+id/guideline3"
            app:layout_constraintGuide_begin="74dp"
            android:orientation="horizontal"
            tools:layout_editor_absoluteY="74dp"
            tools:layout_editor_absoluteX="0dp" />



</android.support.constraint.ConstraintLayout>

在Content\u main.xml中使用FrameLayout并尝试在其中打开片段。e、 g
        <TextView
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:text="@string/welcome"
            android:textAppearance="@android:style/TextAppearance.Large"
            android:id="@+id/textView"
            tools:layout_constraintTop_creator="1"
            tools:layout_constraintRight_creator="1"
            android:layout_marginStart="69dp"
            android:layout_marginEnd="69dp"
            app:layout_constraintRight_toRightOf="parent"
            android:layout_marginTop="74dp"
            tools:layout_constraintLeft_creator="1"
            app:layout_constraintLeft_toLeftOf="parent"
            app:layout_constraintTop_toTopOf="parent" />

        <Button
            android:id="@+id/start_button"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:text="@string/start"
            tools:layout_constraintRight_creator="1"
            tools:layout_constraintBottom_creator="1"
            android:layout_marginStart="8dp"
            app:layout_constraintBottom_toBottomOf="parent"
            android:layout_marginEnd="8dp"
            app:layout_constraintRight_toRightOf="parent"
            tools:layout_constraintLeft_creator="1"
            android:layout_marginBottom="117dp"
            app:layout_constraintLeft_toLeftOf="parent" />

        <android.support.constraint.Guideline
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:id="@+id/guideline"
            android:orientation="vertical"
            app:layout_constraintGuide_begin="367dp"
            tools:layout_editor_absoluteY="0dp"
            tools:layout_editor_absoluteX="367dp" />

        <android.support.constraint.Guideline
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:id="@+id/guideline2"
            app:layout_constraintGuide_begin="20dp"
            android:orientation="vertical"
            tools:layout_editor_absoluteY="0dp"
            tools:layout_editor_absoluteX="20dp" />

        <android.support.constraint.Guideline
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:id="@+id/guideline3"
            app:layout_constraintGuide_begin="74dp"
            android:orientation="horizontal"
            tools:layout_editor_absoluteY="74dp"
            tools:layout_editor_absoluteX="0dp" />



</android.support.constraint.ConstraintLayout>

<FrameLayout
        android:id="@+id/main_fragment"
        android:layout_width="match_parent"
        android:layout_height="match_parent" />

尝试从内容主布局中删除工具：layout=“@layout/fragment\u main”。您必须使用frgament-tansaction从mainactivity-onCreate方法中添加此片段。我刚刚发现了这一点。但这是正确的答案。谢谢你的回答。