1 /*
2  * Copyright (C) 2020 The Android Open Source Project
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  *      http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 
17 package android.graphics.drawable;
18 
19 import com.android.ide.common.rendering.api.ILayoutLog;
20 import com.android.layoutlib.bridge.Bridge;
21 import com.android.tools.layoutlib.annotations.LayoutlibDelegate;
22 
23 import android.graphics.PixelFormat;
24 
25 public class NinePatchDrawable_Delegate {
26 
27     @LayoutlibDelegate
getOpacity(NinePatchDrawable thisDrawable)28     static int getOpacity(NinePatchDrawable thisDrawable) {
29         // User-defined nine-patches can have a null underlying bitmap, if incorrectly constructed.
30         // Trying to preview such a nine-patch drawable will trigger a NullPointerException in the
31         // getOpacity, which then get logged by the Studio crash reporting system.
32         // Do not crash here, but let it instead crash during draw, which gets logged by layoutlib
33         // and is then handled better by Studio.
34         try {
35             return thisDrawable.getOpacity_Original();
36         } catch (NullPointerException ignore) {
37             Bridge.getLog().warning(ILayoutLog.TAG_BROKEN, "The source for the nine-patch " +
38                     "drawable has not been correctly defined.", null , null);
39             return PixelFormat.OPAQUE;
40         }
41     }
42 }
43