Android 使用屏幕滑块和片段自动调整TextView的大小

我用片段页面制作了一个屏幕滑块

问题是在单个页面中，有时

TextView

包含的长文本不会完全显示，但只会显示第一个较短的单词（我认为这是因为其他单词会在屏幕底部空白处的新行中出现）

因此，我实现了自动调整

TextView

大小，但现在所有

TextView

都显得很小（

12sp

），而且文本很短，可能在

36sp

处正确显示（例如，只有一个小字）

main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);
    }
}

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)
}

<?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>

<?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>

<?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>

ScreenSlidePagerAdapter扩展了FragmentStatePagerAdapter:

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);
    }
}

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)
}

<?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>

<?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>

<?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>

屏幕幻灯片片段：

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);
    }
}

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)
}

<?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>

<?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>

<?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>

主布局：

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);
    }
}

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)
}

<?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>

<?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>

<?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>

寻呼机布局：

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);
    }
}

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)
}

<?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>

<?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>

<?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>

单片段页面布局：

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);
    }
}

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)
}

<?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>

<?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>

<?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>

如何使

text\u view\u name

中的文本在大小上能够一致显示

例如，文本

name

必须显示在

36sp

处，文本

name loooooong

必须显示在

<36sp

处

编辑：

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);
    }
}

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)
}

<?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>

<?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>

<?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>

我不想使用外部库

---

谢谢

我想你可以使用

应用程序：autosizemaxtsize

。范例

<TextView
    android:layout_width="match_parent"
    android:layout_height="50dp"
    app:autoSizeTextType="uniform"
    app:autoSizeMinTextSize="20sp"
    app:autoSizeMaxTextSize="36sp" />

请注意，如果您的minSDK>=26，您可以使用android:…而不是app:…

如果无法实现您想要的行为，您可以使用library

在我了解自动调整文本视图大小之前，我一直在使用它，它给了我你想要的行为

如何使用

• 在你的毕业典礼上：

  dependencies {
  compile 'me.grantland:autofittextview:0.2.1'
  }
  

• 在XML中：

  <me.grantland.widget.AutofitTextView
  android:layout_width="match_parent"
  android:layout_height="wrap_content"
  android:singleLine="true"
  android:maxLines="2"
  android:textSize="36sp"
  autofit:minTextSize="12sp"
  />
  

---

如果外部库可以在本地完成，我不想使用它。请给我一个“自动调整文本视图大小”的代码示例。如果您的文本太小，您可以按照潘文林的建议添加

app:autoSizeMinTextSize=“26dp”

。这将有助于添加文本外观的图像。还有一件事-我一直在使用这个库，它工作得很好，一点也不会影响你的性能-我真的很喜欢这个库。你能给我一个使用

自动调整文本视图大小的代码示例吗？