android/support/transition/ViewUtilsApi22.java

/*
 * Copyright (C) 2017 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package android.support.transition;

import android.annotation.SuppressLint;
import android.support.annotation.RequiresApi;
import android.util.Log;
import android.view.View;

import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;

@RequiresApi(22)
class ViewUtilsApi22 extends ViewUtilsApi21 {

    private static final String TAG = "ViewUtilsApi22";

    private static Method sSetLeftTopRightBottomMethod;
    private static boolean sSetLeftTopRightBottomMethodFetched;

    @Override
    public void setLeftTopRightBottom(View v, int left, int top, int right, int bottom) {
        fetchSetLeftTopRightBottomMethod();
        if (sSetLeftTopRightBottomMethod != null) {
            try {
                sSetLeftTopRightBottomMethod.invoke(v, left, top, right, bottom);
            } catch (IllegalAccessException e) {
                // Do nothing
            } catch (InvocationTargetException e) {
                throw new RuntimeException(e.getCause());
            }
        }
    }

    @SuppressLint("PrivateApi")
    private void fetchSetLeftTopRightBottomMethod() {
        if (!sSetLeftTopRightBottomMethodFetched) {
            try {
                sSetLeftTopRightBottomMethod = View.class.getDeclaredMethod("setLeftTopRightBottom",
                        int.class, int.class, int.class, int.class);
                sSetLeftTopRightBottomMethod.setAccessible(true);
            } catch (NoSuchMethodException e) {
                Log.i(TAG, "Failed to retrieve setLeftTopRightBottom method", e);
            }
            sSetLeftTopRightBottomMethodFetched = true;
        }
    }

}