使用ViewPager和片段自动调整TextView的大小

我制作了一个带有片段页面的屏幕滑块。

问题是在一页纸上有时 TextView 包含一个长文本,该文本不会完全显示,但只显示第一个较短的单词(我认为这是因为其他单词将在屏幕底部边距外的新行中显示)。

所以我实现了自动化 文本框 但是现在 文本框 s看起来很小( 12sp ),也可以在 36sp (例如,只有一个小单词)。

主要活动:

public class MainActivity extends FragmentActivity
{
    // The pager widget, which handles animation 
    // and allows swiping horizontally to access previous
    // and next wizard steps.
    private ViewPager mPager;
    // The pager adapter, which provides the pages to the view pager widget.
    private PagerAdapter mPagerAdapter;

    @Override
    protected void onCreate(Bundle savedInstanceState)
    {
        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

        // Instantiate a ViewPager and a PagerAdapter.
        mPager = (ViewPager) findViewById(R.id.pager);
        mPagerAdapter = new ScreenSlidePagerAdapter(getSupportFragmentManager());
        mPager.setAdapter(mPagerAdapter);
    }
}

ScreenSlidePagerAdapter扩展碎片StatePagerAdapter:

private class ScreenSlidePagerAdapter extends FragmentStatePagerAdapter
{
    ScreenSlidePagerAdapter(FragmentManager fm)
    {
        super(fm);
    }

    @Override
    public Fragment getItem(int position)
    {
        ScreenSlidePageFragment fragment = new ScreenSlidePageFragment();

        ...

        return fragment;
    }
}

public class ScreenSlidePageFragment extends Fragment
{
    private int imageId;
    ImageView imageView;

    private String name = "";

    @Override
    public View onCreateView(LayoutInflater inflater
                            , ViewGroup container
                            , Bundle savedInstanceState)
    {
        ViewGroup rootView = null;

        TextView textView = rootView.findViewById(R.id.text_view_name);
        textView.setText(name);

        TextViewCompat.setAutoSizeTextTypeWithDefaults(textView
                  , TextViewCompat.AUTO_SIZE_TEXT_TYPE_UNIFORM);

        return rootView;
    }

    ... getters and setters (e.g. to set the name)
}

主布局:

<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout 
    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"
    android:id="@+id/rootView">

    <android.support.v4.view.ViewPager
        xmlns:android="http://schemas.android.com/apk/res/android"
        android:id="@+id/pager"
        android:layout_width="match_parent"
        android:layout_height="match_parent" />

</android.support.constraint.ConstraintLayout>

寻呼机布局:

<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout 
    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"
    android:id="@+id/rootViewPager">

    <android.support.v4.view.ViewPager
        xmlns:android="http://schemas.android.com/apk/res/android"
        android:id="@+id/pager"
        android:layout_width="match_parent"
        android:layout_height="match_parent" />

</android.support.constraint.ConstraintLayout>

单片段页面布局:

<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout
    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=".MainActivity"
    android:id="@+id/rootView">

    <ImageView
        android:id="@+id/image_view"
        android:layout_width="0dp"
        android:layout_height="0dp"
        app:layout_constraintBottom_toTopOf="@+id/text_view_name"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toRightOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

    <TextView
        android:id="@+id/text_view_name"
        android:layout_width="0dp"
        android:layout_height="50dp"
        android:gravity="center_vertical|center_horizontal"
        android:maxLines="1"
        android:text="Name of image"
        app:autoSizeTextType="uniform"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toRightOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/image_view" />

</android.support.constraint.ConstraintLayout>

如何在 text_view_name 在尺寸上可以统一显示的?

例如,文本 name 必须显示在 36便士 还有文字 name looooooooong 在 < 36sp .

编辑:

我不想使用外部库。

谢谢