android.view.LayoutInflater#setFactory2 ( )源码实例Demo

public static LayoutInflater inject(Context context) {
    LayoutInflater inflater;
    if (context instanceof Activity) {
        inflater = ((Activity) context).getLayoutInflater();
    } else {
        inflater = LayoutInflater.from(context);
    }
    if (inflater == null) {
        return null;
    }
    if (inflater.getFactory2() == null) {
        BackgroundFactory factory = setDelegateFactory(context);
        inflater.setFactory2(factory);
    } else if (!(inflater.getFactory2() instanceof BackgroundFactory)) {
        forceSetFactory2(inflater);
    }
    return inflater;
}
 

public static LayoutInflater inject(Context context) {
    LayoutInflater inflater;
    if (context instanceof Activity) {
        inflater = ((Activity) context).getLayoutInflater();
    } else {
        inflater = LayoutInflater.from(context);
    }
    if (inflater == null) {
        return null;
    }
    if (inflater.getFactory2() == null) {
        BackgroundFactory factory = setDelegateFactory(context);
        inflater.setFactory2(factory);
    } else if (!(inflater.getFactory2() instanceof BackgroundFactory)) {
        forceSetFactory2(inflater);
    }
    return inflater;
}
 

/**
 * Attach a custom Factory interface for creating views while using
 * this LayoutInflater. This must not be null, and can only be set once;
 * after setting, you can not change the factory.
 *
 * @see LayoutInflater#setFactory(android.view.LayoutInflater.Factory)
 * @deprecated Use {@link #setFactory2(LayoutInflater, LayoutInflater.Factory2)} instead to set
 * and {@link LayoutInflater#getFactory2()} to get the factory.
 */
@Deprecated
public static void setFactory(
        LayoutInflater inflater, LayoutInflaterFactory factory) {
    if (Build.VERSION.SDK_INT >= 21) {
        inflater.setFactory2(factory != null ? new LayoutInflaterCompat.Factory2Wrapper(factory) : null);
    } else {
        final LayoutInflater.Factory2 factory2 = factory != null
                ? new LayoutInflaterCompat.Factory2Wrapper(factory) : null;
        inflater.setFactory2(factory2);

        final LayoutInflater.Factory f = inflater.getFactory();
        if (f instanceof LayoutInflater.Factory2) {
            // The merged factory is now set to getFactory(), but not getFactory2() (pre-v21).
            // We will now try and force set the merged factory to mFactory2
            forceSetFactory2(inflater, (LayoutInflater.Factory2) f);
        } else {
            // Else, we will force set the original wrapped Factory2
            forceSetFactory2(inflater, factory2);
        }
    }
}
 

/**
 * Attach a custom {@link LayoutInflater.Factory2} for creating views while using
 * this {@link LayoutInflater}. This must not be null, and can only be set once;
 * after setting, you can not change the factory.
 *
 * @see LayoutInflater#setFactory2(android.view.LayoutInflater.Factory2)
 */
public static void setFactory2(
        LayoutInflater inflater, LayoutInflater.Factory2 factory) {
    inflater.setFactory2(factory);

    if (Build.VERSION.SDK_INT < 21) {
        final LayoutInflater.Factory f = inflater.getFactory();
        if (f instanceof LayoutInflater.Factory2) {
            // The merged factory is now set to getFactory(), but not getFactory2() (pre-v21).
            // We will now try and force set the merged factory to mFactory2
            forceSetFactory2(inflater, (LayoutInflater.Factory2) f);
        } else {
            // Else, we will force set the original wrapped Factory2
            forceSetFactory2(inflater, factory);
        }
    }
}
 

static void setFactory(LayoutInflater inflater, PluginFactoryInterface factory) {
    if (Build.VERSION.SDK_INT >=11) {
        final LayoutInflater.Factory2 factory2 = factory != null
                ? new FactoryWrapper2(factory) : null;
        inflater.setFactory2(factory2);

        if (Build.VERSION.SDK_INT < 21) {
            final LayoutInflater.Factory f = inflater.getFactory();
            if (f instanceof LayoutInflater.Factory2) {
                // The merged factory is now set to getFactory(), but not getFactory2() (pre-v21).
                // We will now try and force set the merged factory to mFactory2
                forceSetFactory2(inflater, (LayoutInflater.Factory2) f);
            } else {
                // Else, we will force set the original wrapped Factory2
                forceSetFactory2(inflater, factory2);
            }
        }
    } else {
        final LayoutInflater.Factory factory1 = factory != null
                ? new FactoryWrapper(factory) : null;
        inflater.setFactory(factory1);
    }

}
 

/**
 * Install Folivora's ViewFactory to current context. note that if
 * you are using AppCompatActivity, this method should called after
 * your activity's super.onCreate() method, since AppCompatDelegate
 * will install a {@link LayoutInflater.Factory2} factory2 to this
 * context.
 *
 * @param ctx context to enable folivora support
 */
public static void installViewFactory(Context ctx) {
  LayoutInflater inflater = LayoutInflater.from(ctx);
  LayoutInflater.Factory2 factory2 = inflater.getFactory2();
  if (factory2 instanceof FolivoraViewFactory) return;
  FolivoraViewFactory viewFactory = new FolivoraViewFactory();
  viewFactory.mFactory2 = factory2;
  if (factory2 != null) {
    FolivoraViewFactory.forceSetFactory2(inflater, viewFactory);
  } else {
    inflater.setFactory2(viewFactory);
  }
}
 

private static void installViewFactoryIfNeeded() {
  Collection<BridgeContext> contexts = peekContexts();
  for (BridgeContext context : contexts) {
    LayoutInflater inflater = LayoutInflater.from(context);
    if (inflater.getFactory2() == null) {
      inflater.setFactory2(new ViewFactory(inflater, context.getLayoutlibCallback()));
    }
  }
}
 

private void initLayoutInflater() {
    mLayoutInflater = (LayoutInflater) super.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
    if (null != mLayoutInflater) {
        mLayoutInflater.setFactory2(this);
    }
}