DisplayUtil.java
/*
* Copyright 2021 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.camera.camera2.internal;
import android.content.Context;
import android.graphics.Point;
import android.hardware.display.DisplayManager;
import android.view.Display;
import androidx.annotation.NonNull;
import androidx.annotation.RequiresApi;
/**
* Utility class for {@link Display} related information.
*/
@RequiresApi(21) // TODO(b/200306659): Remove and replace with annotation on package-info.java
public final class DisplayUtil {
/**
* Retrieves the display which has the max size among all displays.
*/
@SuppressWarnings("deprecation") /* getRealSize */
@NonNull
public static Display getMaxSizeDisplay(@NonNull DisplayManager displayManager) {
Display maxDisplay = null;
int maxDisplaySize = -1;
for (Display display : displayManager.getDisplays()) {
Point displaySize = new Point();
display.getRealSize(displaySize);
if (displaySize.x * displaySize.y > maxDisplaySize) {
maxDisplaySize = displaySize.x * displaySize.y;
maxDisplay = display;
}
}
if (maxDisplay == null) {
throw new IllegalArgumentException("No display can be found from the input display "
+ "manager!");
}
return maxDisplay;
}
/**
* Retrieves the {@link DisplayManager} instance.
*/
@NonNull
public static DisplayManager getDisplayManager(@NonNull Context context) {
return (DisplayManager) context.getSystemService(Context.DISPLAY_SERVICE);
}
private DisplayUtil() {}
}