如何通过位图交换图层列表中的图像？

发布于 2024-09-26 12:29:21 字数 682 浏览 1 评论 0原文

这是我的位图

Bitmap bitmap = BitmapFactory.decodeStream((InputStream) new URL(url).getContent());
//Need some code to access "dynamicItem" and exchange it with my Bitmap

这是我的图层列表（没什么了不起的）。我想用我的位图交换动态项目。

<?xml version="1.0" encoding="utf-8"?>
    <layer-list
      xmlns:android="http://schemas.android.com/apk/res/android">
      <item
        android:id="@+id/dynamicItem"
        android:drawable="@drawable/defaultItem" />
      <item>
        <bitmap

          android:src="@drawable/some_stuff_on_top"
          android:gravity="top|left" />
      </item>
    </layer-list>

原文

Here is my Bitmap

Bitmap bitmap = BitmapFactory.decodeStream((InputStream) new URL(url).getContent());
//Need some code to access "dynamicItem" and exchange it with my Bitmap

And here is my layer list (nothing spectacular). I want to exchange the dynamicItem with my Bitmap.

<?xml version="1.0" encoding="utf-8"?>
    <layer-list
      xmlns:android="http://schemas.android.com/apk/res/android">
      <item
        android:id="@+id/dynamicItem"
        android:drawable="@drawable/defaultItem" />
      <item>
        <bitmap

          android:src="@drawable/some_stuff_on_top"
          android:gravity="top|left" />
      </item>
    </layer-list>

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柒七 2024-10-03 12:29:21

LayerDrawable 中的 setDrawableByLayerId 方法采用 (int, Drawable) 而不是 (int, Bitmap)，因此首先从位图创建一个可绘制对象

Drawable drawable = new BitmapDrawable(bitmap);
layerDrawable.setDrawableByLayerId(R.id.dynamicItem, drawable);

The method setDrawableByLayerId in LayerDrawable takes (int, Drawable) not (int, Bitmap), so first create a drawable from your bitmap

Drawable drawable = new BitmapDrawable(bitmap);
layerDrawable.setDrawableByLayerId(R.id.dynamicItem, drawable);

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燃情 2024-10-03 12:29:21

为了避免在移动图像时拉伸您必须指定重力。就我而言，它有助于上述解决方案：

android:gravity="top|left"

或以编程方式：

 private void shiftLayer(LayerDrawable pieceDrawable,int level){

        int l=level * shiftSize;
        int r=0;
        int t=0;
        int b=0;
        pieceDrawable.setLayerInset(level, l, t, r,  b);
        ((BitmapDrawable)pieceDrawable.getDrawable(level)).setGravity(Gravity.LEFT|Gravity.TOP);
    }

在屏幕上您可能会看到独立图像在左侧被拉伸和模糊

“示例”

拉伸缩放

To avoid stretching while shifting the image You must specify gravity. In my case it helps with mentioned solution:

android:gravity="top|left"

or programmatically:

 private void shiftLayer(LayerDrawable pieceDrawable,int level){

        int l=level * shiftSize;
        int r=0;
        int t=0;
        int b=0;
        pieceDrawable.setLayerInset(level, l, t, r,  b);
        ((BitmapDrawable)pieceDrawable.getDrawable(level)).setGravity(Gravity.LEFT|Gravity.TOP);
    }

On the screen You may see that standalone image is stretched and blur at the left side

example

stretch zoom

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