Java 图像视图在不同设备之间不可缩放_Java_Android_Android Recyclerview_Android Imageview_Android Drawable

Java 图像视图在不同设备之间不可缩放

java android

Java 图像视图在不同设备之间不可缩放,java,android,android-recyclerview,android-imageview,android-drawable,Java,Android,Android Recyclerview,Android Imageview,Android Drawable,我的活动结构如下：使用适配器和CardView布局填充的循环视图 CardView由一个约束布局组成，该布局包含一个图像和两个文本框图像被设置为从URL异步加载的可绘制图像下面是一些代码：图像加载： try { InputStream is = (InputStream) new URL(url).getContent(); Drawable d = Drawable.createFromStream(is, "src name");

我的活动结构如下：

使用适配器和CardView布局填充的循环视图

CardView由一个约束布局组成，该布局包含一个图像和两个文本框

图像被设置为从URL异步加载的可绘制图像

下面是一些代码：

图像加载：

  try {
        InputStream is = (InputStream) new URL(url).getContent();
        Drawable d = Drawable.createFromStream(is, "src name");
        Bitmap bitmap = ((BitmapDrawable) d).getBitmap();
        Drawable temp = new BitmapDrawable(Bitmap.createScaledBitmap(bitmap, 300, 300, true));
        return temp;
      }
 catch (Exception e) {
        e.printStackTrace();
        return null;
      }

 This is called later in a different function where vh is the ViewHolder:
   vh.imageView.setImageDrawable(d);

<?xml version="1.0" encoding="utf-8"?>
<FrameLayout 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="wrap_content">

    <androidx.cardview.widget.CardView
        android:id="@+id/card_view"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        app:cardCornerRadius="4dp"
        app:cardElevation="4dp"
        app:cardUseCompatPadding="true"
        app:contentPadding="16dp" >

        <androidx.constraintlayout.widget.ConstraintLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content">

            <ImageView
                android:id="@+id/playlist_image"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                app:layout_constraintBottom_toBottomOf="parent"
                app:layout_constraintEnd_toStartOf="@+id/playlist_name"
                app:layout_constraintHorizontal_bias="0.0"
                app:layout_constraintStart_toStartOf="parent"
                app:layout_constraintTop_toTopOf="parent"
                app:layout_constraintVertical_bias="0.0"
                app:srcCompat="@mipmap/ic_launcher" />
etc...

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.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=".PlaylistChoose">

    <androidx.recyclerview.widget.RecyclerView
        android:id="@+id/playlist_view"
        android:layout_width="0dp"
        android:layout_height="0dp"
        android:layout_marginStart="1dp"
        android:layout_marginEnd="1dp"
        android:clickable="true"
        android:focusable="auto"
        android:foreground="?attr/selectableItemBackground"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        tools:listitem="@layout/custom_playlist_view" >

    </androidx.recyclerview.widget.RecyclerView>

</androidx.constraintlayout.widget.ConstraintLayout>

  <ImageView
    android:id="@+id/imageView2"
    android:layout_width="0dp"
    android:layout_height="0dp"
    app:layout_constraintWidth_percent="0.25"
    app:layout_constraintHeight_percent="0.25"
    android:scaleType="fitXY"
    app:layout_constraintBottom_toBottomOf="parent"
    app:layout_constraintEnd_toEndOf="parent"
    app:layout_constraintHorizontal_bias="0.5"
    app:layout_constraintStart_toStartOf="parent"
    app:layout_constraintTop_toTopOf="parent"
    app:srcCompat="@drawable/your_image" />

   app:layout_constraintWidth_percent="0.25"
   app:layout_constraintHeight_percent="0.25"

CardView XML:

  try {
        InputStream is = (InputStream) new URL(url).getContent();
        Drawable d = Drawable.createFromStream(is, "src name");
        Bitmap bitmap = ((BitmapDrawable) d).getBitmap();
        Drawable temp = new BitmapDrawable(Bitmap.createScaledBitmap(bitmap, 300, 300, true));
        return temp;
      }
 catch (Exception e) {
        e.printStackTrace();
        return null;
      }

 This is called later in a different function where vh is the ViewHolder:
   vh.imageView.setImageDrawable(d);

<?xml version="1.0" encoding="utf-8"?>
<FrameLayout 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="wrap_content">

    <androidx.cardview.widget.CardView
        android:id="@+id/card_view"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        app:cardCornerRadius="4dp"
        app:cardElevation="4dp"
        app:cardUseCompatPadding="true"
        app:contentPadding="16dp" >

        <androidx.constraintlayout.widget.ConstraintLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content">

            <ImageView
                android:id="@+id/playlist_image"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                app:layout_constraintBottom_toBottomOf="parent"
                app:layout_constraintEnd_toStartOf="@+id/playlist_name"
                app:layout_constraintHorizontal_bias="0.0"
                app:layout_constraintStart_toStartOf="parent"
                app:layout_constraintTop_toTopOf="parent"
                app:layout_constraintVertical_bias="0.0"
                app:srcCompat="@mipmap/ic_launcher" />
etc...

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.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=".PlaylistChoose">

    <androidx.recyclerview.widget.RecyclerView
        android:id="@+id/playlist_view"
        android:layout_width="0dp"
        android:layout_height="0dp"
        android:layout_marginStart="1dp"
        android:layout_marginEnd="1dp"
        android:clickable="true"
        android:focusable="auto"
        android:foreground="?attr/selectableItemBackground"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        tools:listitem="@layout/custom_playlist_view" >

    </androidx.recyclerview.widget.RecyclerView>

</androidx.constraintlayout.widget.ConstraintLayout>

  <ImageView
    android:id="@+id/imageView2"
    android:layout_width="0dp"
    android:layout_height="0dp"
    app:layout_constraintWidth_percent="0.25"
    app:layout_constraintHeight_percent="0.25"
    android:scaleType="fitXY"
    app:layout_constraintBottom_toBottomOf="parent"
    app:layout_constraintEnd_toEndOf="parent"
    app:layout_constraintHorizontal_bias="0.5"
    app:layout_constraintStart_toStartOf="parent"
    app:layout_constraintTop_toTopOf="parent"
    app:srcCompat="@drawable/your_image" />

   app:layout_constraintWidth_percent="0.25"
   app:layout_constraintHeight_percent="0.25"



S7 1400：
AVD 300：
S7 300:
尝试在ImageView中添加缩放类型并调整视图边界
<ImageView
   android:id="@+id/playlist_image"
   android:layout_width="wrap_content"
   android:layout_height="wrap_content"
   android:scaleType="fitCenter"
   android:adjustViewBounds="true"
   app:layout_constraintBottom_toBottomOf="parent"
   app:layout_constraintEnd_toStartOf="@+id/playlist_name"
   app:layout_constraintHorizontal_bias="0.0"
   app:layout_constraintStart_toStartOf="parent"
   app:layout_constraintTop_toTopOf="parent"
   app:layout_constraintVertical_bias="0.0"
   app:srcCompat="@mipmap/ic_launcher" />


我有点困惑，因为图像位于设置为包装内容的约束布局内，并且两款手机的内容大小相同
不同手机的内容可能相同，但由于不同手机在ImageView
上使用wrap\u内容时屏幕大小不同，因此并非所有设备上的内容都相同
如何修复：
  try {
        InputStream is = (InputStream) new URL(url).getContent();
        Drawable d = Drawable.createFromStream(is, "src name");
        Bitmap bitmap = ((BitmapDrawable) d).getBitmap();
        Drawable temp = new BitmapDrawable(Bitmap.createScaledBitmap(bitmap, 300, 300, true));
        return temp;
      }
 catch (Exception e) {
        e.printStackTrace();
        return null;
      }

 This is called later in a different function where vh is the ViewHolder:
   vh.imageView.setImageDrawable(d);

<?xml version="1.0" encoding="utf-8"?>
<FrameLayout 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="wrap_content">

    <androidx.cardview.widget.CardView
        android:id="@+id/card_view"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        app:cardCornerRadius="4dp"
        app:cardElevation="4dp"
        app:cardUseCompatPadding="true"
        app:contentPadding="16dp" >

        <androidx.constraintlayout.widget.ConstraintLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content">

            <ImageView
                android:id="@+id/playlist_image"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                app:layout_constraintBottom_toBottomOf="parent"
                app:layout_constraintEnd_toStartOf="@+id/playlist_name"
                app:layout_constraintHorizontal_bias="0.0"
                app:layout_constraintStart_toStartOf="parent"
                app:layout_constraintTop_toTopOf="parent"
                app:layout_constraintVertical_bias="0.0"
                app:srcCompat="@mipmap/ic_launcher" />
etc...

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.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=".PlaylistChoose">

    <androidx.recyclerview.widget.RecyclerView
        android:id="@+id/playlist_view"
        android:layout_width="0dp"
        android:layout_height="0dp"
        android:layout_marginStart="1dp"
        android:layout_marginEnd="1dp"
        android:clickable="true"
        android:focusable="auto"
        android:foreground="?attr/selectableItemBackground"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        tools:listitem="@layout/custom_playlist_view" >

    </androidx.recyclerview.widget.RecyclerView>

</androidx.constraintlayout.widget.ConstraintLayout>

  <ImageView
    android:id="@+id/imageView2"
    android:layout_width="0dp"
    android:layout_height="0dp"
    app:layout_constraintWidth_percent="0.25"
    app:layout_constraintHeight_percent="0.25"
    android:scaleType="fitXY"
    app:layout_constraintBottom_toBottomOf="parent"
    app:layout_constraintEnd_toEndOf="parent"
    app:layout_constraintHorizontal_bias="0.5"
    app:layout_constraintStart_toStartOf="parent"
    app:layout_constraintTop_toTopOf="parent"
    app:srcCompat="@drawable/your_image" />

   app:layout_constraintWidth_percent="0.25"
   app:layout_constraintHeight_percent="0.25"

使用ConstraintLayout
可以执行以下操作：
将其用作图像视图：
  try {
        InputStream is = (InputStream) new URL(url).getContent();
        Drawable d = Drawable.createFromStream(is, "src name");
        Bitmap bitmap = ((BitmapDrawable) d).getBitmap();
        Drawable temp = new BitmapDrawable(Bitmap.createScaledBitmap(bitmap, 300, 300, true));
        return temp;
      }
 catch (Exception e) {
        e.printStackTrace();
        return null;
      }

 This is called later in a different function where vh is the ViewHolder:
   vh.imageView.setImageDrawable(d);

<?xml version="1.0" encoding="utf-8"?>
<FrameLayout 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="wrap_content">

    <androidx.cardview.widget.CardView
        android:id="@+id/card_view"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        app:cardCornerRadius="4dp"
        app:cardElevation="4dp"
        app:cardUseCompatPadding="true"
        app:contentPadding="16dp" >

        <androidx.constraintlayout.widget.ConstraintLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content">

            <ImageView
                android:id="@+id/playlist_image"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                app:layout_constraintBottom_toBottomOf="parent"
                app:layout_constraintEnd_toStartOf="@+id/playlist_name"
                app:layout_constraintHorizontal_bias="0.0"
                app:layout_constraintStart_toStartOf="parent"
                app:layout_constraintTop_toTopOf="parent"
                app:layout_constraintVertical_bias="0.0"
                app:srcCompat="@mipmap/ic_launcher" />
etc...

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.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=".PlaylistChoose">

    <androidx.recyclerview.widget.RecyclerView
        android:id="@+id/playlist_view"
        android:layout_width="0dp"
        android:layout_height="0dp"
        android:layout_marginStart="1dp"
        android:layout_marginEnd="1dp"
        android:clickable="true"
        android:focusable="auto"
        android:foreground="?attr/selectableItemBackground"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        tools:listitem="@layout/custom_playlist_view" >

    </androidx.recyclerview.widget.RecyclerView>

</androidx.constraintlayout.widget.ConstraintLayout>

  <ImageView
    android:id="@+id/imageView2"
    android:layout_width="0dp"
    android:layout_height="0dp"
    app:layout_constraintWidth_percent="0.25"
    app:layout_constraintHeight_percent="0.25"
    android:scaleType="fitXY"
    app:layout_constraintBottom_toBottomOf="parent"
    app:layout_constraintEnd_toEndOf="parent"
    app:layout_constraintHorizontal_bias="0.5"
    app:layout_constraintStart_toStartOf="parent"
    app:layout_constraintTop_toTopOf="parent"
    app:srcCompat="@drawable/your_image" />

   app:layout_constraintWidth_percent="0.25"
   app:layout_constraintHeight_percent="0.25"

你可以用
  android:scaleType="fitXY"

已解决！这是因为@ADM建议使用glide库，同时@Tamir Abutbul建议正确加载图像的比例和约束百分比：）
XML:
硬编码图像像素大小不是一个好主意。。只需在dp
中使用一个固定大小的ImageView
，并使用一些库来高效地下载图像。@ADM我正在使用库，它会加载图像，但我并不真正理解你在dp中使用固定大小的意思，因此它会以非常大的大小加载图像。你能进一步说明你的确切意思吗？对我来说不起作用，图像看起来仍然很小，我认为ImageView没有问题，因为在xml中有一个默认图像被设置为图像视图的源（在我得到url图像之前），默认图像在avd和s7上都可以正常加载。android:layout\u width=“匹配家长”android:layout\u height=“匹配家长”