Question

我正在尝试通过反射在JNI（C ++）中创建一个Android Bitmap对象（Java）。下面的代码工作正常，直到Android L版本，但在Android M上没有。在Android M中，mNativeBitmap的名称被修改为mNativePtr，这被考虑在内。即使在此更改代码崩溃之后。

 bitmapClazz = env->FindClass("android/graphics/Bitmap");
 createBitmapMethod = env->GetStaticMethodID(bitmapClazz, "createBitmap", 
        "(IILandroid/graphics/Bitmap$Config;)" 
        "Landroid/graphics/Bitmap;");

#ifdef AND_VER_6_0
    jfieldID nativeBitmap = env->GetFieldID(bitmapClazz, "mNativePtr", "J");
#elif AND_VER_5_0
    jfieldID nativeBitmap = env->GetFieldID(bitmapClazz, "mNativeBitmap", "J");
#endif

jclass configClazz = env->FindClass("android/graphics/Bitmap$Config");

 jmethodID createConfigMethod = env->GetStaticMethodID(configClazz, "nativeToConfig","(I)Landroid/graphics/Bitmap$Config;");
 jfieldID RB565FieldId = env->GetStaticFieldID(configClazz, "RGB_565", "Landroid/graphics/Bitmap$Config;");

jobject RGB565Config = env->GetStaticObjectField(configClazz, RB565FieldId);            
jobject jBitmap = env->CallStaticObjectMethod( bitmapClazz,  
            createBitmapMethod, 
            width, 
            height, 
            RGB565Config);

#if defined AND_VER_5_0 || defined AND_VER_6_0
            SkBitmap *bitmap =
                (SkBitmap *) env->GetLongField(jBitmap, nativeBitmap);
#else
            SkBitmap *bitmap =
                (SkBitmap *) env->GetIntField(jBitmap, nativeBitmap);
#endif

 memcpy((uint8_t*)bitmap->getPixels(),
                        (uint8_t*)thumbnail_PixelArray, height*width*2);

如果我删除了位图 - > getPixels（）的memcpy，那么代码不会崩溃。所以我们怀疑由于memcpy调用导致一些内存损坏。如果有人能解决这个问题，请帮我解决。

Android M Bitmap崩溃

0 个答案: