如何在Android上用Glide显示数据库图像？

我的应用程序中有一个

SqliteDatabase

。在这个数据库中，我保存了Sting和Blob（用于保存图像）。此图像以字节[]保存在应用程序中。我使用以下代码将此图像转换为位图：

    byte[] Recycler_imageByte;
    Bitmap Recycler_theImage;

holder.Recycler_imageByte = data.get(position).getKey_image();
ByteArrayInputStream imageStream = new ByteArrayInputStream(holder.Recycler_imageByte);
holder.Recycler_theImage = BitmapFactory.decodeStream(imageStream);

Glide.with(context).load(holder.Recycler_theImage).asBitmap().into(holder.Recycler_adapter_image);

我想在

Glide

libary中显示此图像，我编写了以下代码：

    byte[] Recycler_imageByte;
    Bitmap Recycler_theImage;

holder.Recycler_imageByte = data.get(position).getKey_image();
ByteArrayInputStream imageStream = new ByteArrayInputStream(holder.Recycler_imageByte);
holder.Recycler_theImage = BitmapFactory.decodeStream(imageStream);

Glide.with(context).load(holder.Recycler_theImage).asBitmap().into(holder.Recycler_adapter_image);

但是，当我运行应用程序时，会显示以下错误：

03-15 10:23:14.311 22440-22440/com.tellfa.dastanak E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.tellfa.dastanak, PID: 22440
java.lang.IllegalArgumentException: Unknown type class android.graphics.Bitmap. You must provide a Model of a type for which there is a registered ModelLoader, if you are using a custom model, you must first call Glide#register with a ModelLoaderFactory for your custom model class
at com.bumptech.glide.RequestManager.loadGeneric(RequestManager.java:629)
at com.bumptech.glide.RequestManager.load(RequestManager.java:598)
at com.tellfa.dastanak.Adapters.fragment_RecyclerAdapter.onBindViewHolder(fragment_RecyclerAdapter.java:54)
at com.tellfa.dastanak.Adapters.fragment_RecyclerAdapter.onBindViewHolder(fragment_RecyclerAdapter.java:27)
at jp.wasabeef.recyclerview.adapters.AnimationAdapter.onBindViewHolder(AnimationAdapter.java:55)
at jp.wasabeef.recyclerview.adapters.AnimationAdapter.onBindViewHolder(AnimationAdapter.java:55)
at android.support.v7.widget.RecyclerView$Adapter.onBindViewHolder(RecyclerView.java:5217)
at android.support.v7.widget.RecyclerView$Adapter.bindViewHolder(RecyclerView.java:5250)
at android.support.v7.widget.RecyclerView$Recycler.getViewForPosition(RecyclerView.java:4487)
at android.support.v7.widget.RecyclerView$Recycler.getViewForPosition(RecyclerView.java:4363)
at android.support.v7.widget.LinearLayoutManager$LayoutState.next(LinearLayoutManager.java:1961)
at android.support.v7.widget.LinearLayoutManager.layoutChunk(LinearLayoutManager.java:1370)
at android.support.v7.widget.LinearLayoutManager.fill(LinearLayoutManager.java:1333)
at android.support.v7.widget.LinearLayoutManager.onLayoutChildren(LinearLayoutManager.java:562)
at android.support.v7.widget.RecyclerView.dispatchLayout(RecyclerView.java:2900)
at android.support.v7.widget.RecyclerView.onLayout(RecyclerView.java:3071)
at android.view.View.layout(View.java:15654)
at android.view.ViewGroup.layout(ViewGroup.java:4969)
at android.support.v4.widget.SwipeRefreshLayout.onLayout(SwipeRefreshLayout.java:584)
at android.view.View.layout(View.java:15654)
at android.view.ViewGroup.layout(ViewGroup.java:4969)
at android.widget.RelativeLayout.onLayout(RelativeLayout.java:1077)
at android.view.View.layout(View.java:15654)
at android.view.ViewGroup.layout(ViewGroup.java:4969)
at android.widget.FrameLayout.layoutChildren(FrameLayout.java:573)
at android.widget.FrameLayout.onLayout(FrameLayout.java:508)
at android.view.View.layout(View.java:15654)
at android.view.ViewGroup.layout(ViewGroup.java:4969)
at android.widget.RelativeLayout.onLayout(RelativeLayout.java:1077)
at android.view.View.layout(View.java:15654)
at android.view.ViewGroup.layout(ViewGroup.java:4969)
at android.support.v4.view.ViewPager.onLayout(ViewPager.java:1627)
at android.view.View.layout(View.java:15654)
at android.view.ViewGroup.layout(ViewGroup.java:4969)
at android.support.design.widget.CoordinatorLayout.layoutChild(CoordinatorLayout.java:1037)
at android.support.design.widget.CoordinatorLayout.onLayoutChild(CoordinatorLayout.java:747)
at android.support.design.widget.ViewOffsetBehavior.onLayoutChild(ViewOffsetBehavior.java:42)
at android.support.design.widget.AppBarLayout$ScrollingViewBehavior.onLayoutChild(AppBarLayout.java:1156)
at android.support.design.widget.CoordinatorLayout.onLayout(CoordinatorLayout.java:760)
at android.view.View.layout(View.java:15654)
at android.view.ViewGroup.layout(ViewGroup.java:4969)
at android.support.v4.widget.DrawerLayout.onLayout(DrawerLayout.java:1043)
at android.view.View.layout(View.java:15654)
at android.view.ViewGroup.layout(ViewGroup.java:4969)
at android.widget.FrameLayout.layoutChildren(FrameLayout.java:573)
at android.widget.FrameLayout.onLayout(FrameLayout.java:508)
at android.view.View.layout(View.java:15654)
at android.view.ViewGroup.layout(ViewGroup.java:4969)
at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1705)
at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1559)
at android.widget.LinearLayout.onLayout(LinearLayout.java:1468)
at android.view.View.layout(Vi

---

如何修复它并在Glide库中显示位图？谢谢大家。

使用以下方法将图像转换为字节数组，并以BLOB形式存储到数据库中

public String bitmapToString(Bitmap bmp) {
        ByteArrayOutputStream os = new ByteArrayOutputStream();
        bmp.compress(Bitmap.CompressFormat.JPEG, 100, os);
        byte[] bytes = os.toByteArray();
        return Base64.encodeToString(bytes, Base64.DEFAULT);
    }

当您想使用Glide显示到图像视图中时，请使用以下命令

public void stringToBitmap(String str) {
        byte[] bytesImage = Base64.decode(str, Base64.DEFAULT);
        //Bitmap bitmap = BitmapFactory.decodeByteArray(bytesImage, 0, bytesImage.length);
        //ivImage.setImageBitmap(bitmap);
        // using glide
        Glide.with(this).load(bytesImage).asBitmap().into(ivImage);
    }

从数据库存储和检索图像的简单示例

活动\u main.xml

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">

    <Button
        android:id="@+id/btnInsert"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_centerHorizontal="true"
        android:text="Insert into DB" />

    <Button
        android:id="@+id/btnView"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_centerHorizontal="true"
        android:text="View from DB" />

    <ImageView
        android:id="@+id/ivImage"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_centerHorizontal="true" />
</LinearLayout>

---

我希望它对你有用。

谢谢你的帮助，但我不明白！我用字节[]保存图像，但您用字节[]保存Base64。保存图像在哪里？请帮帮我