Android getResources().getDrawable() deprecated API 22

以下解决方法摘自 stackoverflow , 点击下方链接可跳转

Android getResources().getDrawable() deprecated API 22

No.1

You have some options to handle this deprecation the right (and future proof) way, depending on which kind of drawable you are loading:

• A) drawables with theme attributes

ContextCompat.getDrawable(getActivity(), R.drawable.name);

You’ll obtain a styled Drawable as your Activity theme instructs. This is probably what you need.

*　B) drawables without theme attributes

ResourcesCompat.getDrawable(getResources(), R.drawable.name, null);

You’ll get your unstyled drawable the old way.

EXTRA) drawables with theme attributes from another theme

ResourcesCompat.getDrawable(getResources(), R.drawable.name, anotherTheme);

Explanation:

API 21 (Android 5.0 Lollipop) introduced some new theme attributes such as android:colorAccent that modify the appearance of drawables that hold references to those new theme attributes values.The AppCompat library handles pre and post-Lollipop drawable styling for you.

If you do use the deprecated getDrawable() method to obtain a drawable resource with theme attributes, you will get a partially-styled drawable and a logcat warning.You can see this in API 22 android.content.res.Resources source code:

@Deprecated
@Nullable
public Drawable getDrawable(int id) throws NotFoundException {
    final Drawable d = getDrawable(id, null);
    if (d != null && d.canApplyTheme()) {
        Log.w(TAG, "Drawable " + getResourceName(id) + " has unresolved theme "
                + "attributes! Consider using Resources.getDrawable(int, Theme) or "
                + "Context.getDrawable(int).", new RuntimeException());
    }
    return d;
}

No.2

You should use the following code from the support library instead:

ContextCompat.getDrawable(context, R.drawable.***)

Using this method is equivalent to calling:

if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
    return resources.getDrawable(id, context.getTheme());
} else {
    return resources.getDrawable(id);
}

As of API 21, you should use the getDrawable(int, Theme) method instead of getDrawable(int), as it allows you to fetch a drawable object associated with a particular resource ID for the given screen density/theme. Calling the deprecated getDrawable(int) method is equivalent to calling getDrawable(int, null).