I want to load an image from url in onDraw method for the view preview. I tried to do this using Picasso. But, I get an error in the xml. This is the onDraw method.

@Override
    protected void onDraw(Canvas canvas) {
        this.canvas = canvas;
        Picasso.get()
                .load(currentUrl)
                .into(new Target() {
                    @Override
                    public void onBitmapLoaded(Bitmap bitmap, Picasso.LoadedFrom from) {
                        Drawable d = new BitmapDrawable(getResources(), bitmap);
                        d.draw(canvas);
                    }

                    @Override
                    public void onBitmapFailed(Exception e, Drawable errorDrawable) {
                        Paint paint = new Paint();
                        paint.setColor(Color.BLACK);
                        canvas.drawText("Error to load",getWidth() / 2, getHeight() / 2,paint);
                    }

                    @Override
                    public void onPrepareLoad(Drawable placeHolderDrawable) {

                    }
                });
    }

But, Picasso complains about no context to load the file from. This is the error:

And the text:

java.lang.IllegalStateException: context == null
    at com.squareup.picasso.Picasso.get(Picasso.java:681)
    at com.sambhav2358.badgegeneratorlibrary.BadgeView.setLogo(BadgeView.java:189)
    at com.sambhav2358.badgegeneratorlibrary.BadgeView.init(BadgeView.java:69)
    at com.sambhav2358.badgegeneratorlibrary.BadgeView.<init>(BadgeView.java:91)
    at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
    at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
    at java.base/jdk.internal.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
    at java.base/java.lang.reflect.Constructor.newInstance(Constructor.java:490)
    at org.jetbrains.android.uipreview.ViewLoader.createNewInstance(ViewLoader.java:352)
    at org.jetbrains.android.uipreview.ViewLoader.loadClass(ViewLoader.java:189)
    at org.jetbrains.android.uipreview.ViewLoader.loadView(ViewLoader.java:149)
    at com.android.tools.idea.rendering.LayoutlibCallbackImpl.loadView(LayoutlibCallbackImpl.java:301)
    at android.view.BridgeInflater.loadCustomView(BridgeInflater.java:417)
    at android.view.BridgeInflater.loadCustomView(BridgeInflater.java:428)
    at android.view.BridgeInflater.createViewFromTag(BridgeInflater.java:332)
    at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:965)
    at android.view.LayoutInflater.rInflate_Original(LayoutInflater.java:1127)
    at android.view.LayoutInflater_Delegate.rInflate(LayoutInflater_Delegate.java:72)
    at android.view.LayoutInflater.rInflate(LayoutInflater.java:1101)
    at android.view.LayoutInflater.rInflateChildren(LayoutInflater.java:1088)
    at android.view.LayoutInflater.inflate(LayoutInflater.java:686)
    at android.view.LayoutInflater.inflate(LayoutInflater.java:505)
    at com.android.layoutlib.bridge.impl.RenderSessionImpl.inflate(RenderSessionImpl.java:361)
    at com.android.layoutlib.bridge.Bridge.createSession(Bridge.java:436)
    at com.android.tools.idea.layoutlib.LayoutLibrary.createSession(LayoutLibrary.java:121)
    at com.android.tools.idea.rendering.RenderTask.createRenderSession(RenderTask.java:736)
    at com.android.tools.idea.rendering.RenderTask.lambda$inflate$7(RenderTask.java:892)
    at com.android.tools.idea.rendering.RenderExecutor$runAsyncActionWithTimeout$2.run(RenderExecutor.kt:187)
    at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
    at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
    at java.base/java.lang.Thread.run(Thread.java:829)

CodePudding user response：

AFAIK, it is not possible to obtain Context reference if the application is not running.

CodePudding user response：

Did you try to use Glide? It is another library for charge images.

repositories {
    mavenCentral()
}

dependencies {
    compile 'com.github.bumptech.glide:glide:3.6.1'
    compile 'com.android.support:support-v4:23.1.1'
}

Try to do this

  private void initLocal() {
        // Charge img 
        Glide.with(this).load(URL).into(imgView);
    }