Is it possible to load a drawable from the assets

问题:

Can you load a drawable from a sub directory in the assets (not the drawable folder) folder?

回答1:

Hope this help:

Drawable d = Drawable.createFromStream(getAssets().open("Cloths/btn_no.png"), null);

回答2:

I recommend to use this

 Drawable.createFromResourceStream(resources,new TypedValue(), resources.getAssets().open(filename), null)

which returns properly scaled drawable thanks to resources ...

回答3:

Here's a class with static method to get the drawable from the assets. It also closes the inputstream.

import android.content.Context;
import android.graphics.drawable.Drawable;

import java.io.IOException;
import java.io.InputStream;

/**
 * Created by bartburg on 4-11-2015.
 */
public class AssetsReader {

    public static Drawable getDrawableFromAssets(Context context, String url){
        Drawable drawable = null;
        InputStream inputStream = null;
        try {
            inputStream = context.getAssets().open(url);
            drawable = Drawable.createFromStream(inputStream, null);
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            if(inputStream != null) {
                try {
                    inputStream.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }
        return drawable;
    }
}

回答4:

Yes you can create a Drawable object from an InputStream using the createFromStream() method.

回答5:

Here is function that does this for you.

Check the returned Drawable variable for null as null may return if the path is invalid or there is an IOException.

public static Drawable getDrawableFromAssetFolder(String fullPath, Activity ctx) {
    Drawable d =null;
    try {
        d = Drawable.createFromStream(ctx.getAssets().open(fullPath), null);
    } catch (IOException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }
    return d;
}

回答6:

This helped getting the right density

private Drawable drawableFromAssetFilename(String filename) {
    AssetManager assetManager = mApplicationContext.getAssets();
    InputStream inputStream = null;
    try {
        inputStream = assetManager.open(filename);
    } catch (IOException e) {
        e.printStackTrace();
    }
    Bitmap bitmap = BitmapFactory.decodeStream(inputStream);

    BitmapDrawable drawable = new BitmapDrawable(mApplicationContext.getResources(), bitmap);
    return drawable;
}

回答7:

At this version you can't, if you make a sub folder within your drawable folder you can't use it in your xml file, it won't be recognized when you use android:src.

Take a look at this thread: Can the Android drawable directory contain subdirectories?