Question

我有一张地图图片，想要使用Picasso库加载地图。加载地图后，我想在其上绘制canvas但我收到此错误。

java.lang.IllegalStateException: Immutable bitmap passed to Canvas constructor
at android.graphics.Canvas.<init>(Canvas.java:127)
at com.example.sev_user.smarthome.gui.fragment.MapFragment$1.onBitmapLoaded(MapFragment.java:108)
at com.squareup.picasso.TargetAction.complete(TargetAction.java:36)
at com.squareup.picasso.Picasso.deliverAction(Picasso.java:557)
at com.squareup.picasso.Picasso.complete(Picasso.java:509)
at com.squareup.picasso.Picasso$1.handleMessage(Picasso.java:116)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:137)
at android.app.ActivityThread.main(ActivityThread.java:4950)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:511)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:997)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:764)
at dalvik.system.NativeStart.main(Native Method)

这是我的代码：

final Target target = new Target() {
        @Override
        public void onBitmapLoaded(Bitmap bitmap, Picasso.LoadedFrom from) {
            mMapCanvas = new Canvas(bitmap);
            mIvMap.setImageBitmap(bitmap);
            reloadMap();
        }

        @Override
        public void onBitmapFailed(Drawable errorDrawable) {

        }

        @Override
        public void onPrepareLoad(Drawable placeHolderDrawable) {

        }
    };
    mIvMap.setTag(target);
    Picasso.with(getActivity())
            .load(R.drawable.housemap)
            .config(Bitmap.Config.RGB_565)
            .into(target);

据我所知，canvas需要一个可变的位图，但我不想使用bitmap.copy()。它可能与这篇文章有关：Draw a line on ImageView set by Picasso但我需要一些东西不能创建新的位图。

请帮助我！

如何使用picasso创建可变位图？

0 个答案: