ViewUtilsApi21.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 androidx.transition;
import android.annotation.SuppressLint;
import android.graphics.Matrix;
import android.view.View;
import androidx.annotation.NonNull;
import androidx.annotation.Nullable;
import androidx.annotation.RequiresApi;
@RequiresApi(21)
class ViewUtilsApi21 extends ViewUtilsApi19 {
/**
* False when linking of the hidden setAnimationMatrix method has previously failed.
*/
private static boolean sTryHiddenSetAnimationMatrix = true;
/**
* False when linking of the hidden transformMatrixToGlobal method has previously failed.
*/
private static boolean sTryHiddenTransformMatrixToGlobal = true;
/**
* False when linking of the hidden transformMatrixToLocal method has previously failed.
*/
private static boolean sTryHiddenTransformMatrixToLocal = true;
@Override
@SuppressLint("NewApi") // Lint doesn't know about the hidden method.
public void transformMatrixToGlobal(@NonNull View view, @NonNull Matrix matrix) {
if (sTryHiddenTransformMatrixToGlobal) {
// Since this was an @hide method made public, we can link directly against it with
// a try/catch for its absence instead of doing the same through reflection.
try {
view.transformMatrixToGlobal(matrix);
} catch (NoSuchMethodError e) {
sTryHiddenTransformMatrixToGlobal = false;
}
}
}
@Override
@SuppressLint("NewApi") // Lint doesn't know about the hidden method.
public void transformMatrixToLocal(@NonNull View view, @NonNull Matrix matrix) {
if (sTryHiddenTransformMatrixToLocal) {
// Since this was an @hide method made public, we can link directly against it with
// a try/catch for its absence instead of doing the same through reflection.
try {
view.transformMatrixToLocal(matrix);
} catch (NoSuchMethodError e) {
sTryHiddenTransformMatrixToLocal = false;
}
}
}
@Override
@SuppressLint("NewApi") // Lint doesn't know about the hidden method.
public void setAnimationMatrix(@NonNull View view, @Nullable Matrix matrix) {
if (sTryHiddenSetAnimationMatrix) {
// Since this was an @hide method made public, we can link directly against it with
// a try/catch for its absence instead of doing the same through reflection.
try {
view.setAnimationMatrix(matrix);
} catch (NoSuchMethodError e) {
sTryHiddenSetAnimationMatrix = false;
}
}
}
}