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/*
* Copyright (C) 2006 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.content.res;
import android.content.pm.ApplicationInfo;
import android.util.DisplayMetrics;
import android.view.Gravity;
/**
* CompatibilityInfo class keeps the information about compatibility mode that the application is
* running under.
*
* {@hide}
*/
public class CompatibilityInfo {
/** default compatibility info object for compatible applications */
public static final CompatibilityInfo DEFAULT_COMPATIBILITY_INFO = new CompatibilityInfo();
/**
* The default width of the screen in portrait mode.
*/
public static final int DEFAULT_PORTRAIT_WIDTH = 320;
/**
* The default height of the screen in portrait mode.
*/
public static final int DEFAULT_PORTRAIT_HEIGHT = 480;
/**
* Application's scale.
*/
public final float mApplicationScale;
/**
* Application's inverted scale.
*/
public final float mApplicationInvertedScale;
/**
* A boolean flag to indicates that the application can expand over the original size.
* The flag is set to true if
* 1) Application declares its expandable in manifest file using <expandable /> or
* 2) The screen size is same as (320 x 480) * density.
*/
public boolean mExpandable;
/**
* A expandable flag in the configuration.
*/
public final boolean mConfiguredExpandable;
/**
* A boolean flag to tell if the application needs scaling (when mApplicationScale != 1.0f)
*/
public final boolean mScalingRequired;
public CompatibilityInfo(ApplicationInfo appInfo) {
mExpandable = mConfiguredExpandable = appInfo.expandable;
float packageDensityScale = -1.0f;
if (appInfo.supportsDensities != null) {
int minDiff = Integer.MAX_VALUE;
for (int density : appInfo.supportsDensities) {
if (density == ApplicationInfo.ANY_DENSITY) {
packageDensityScale = 1.0f;
break;
}
int tmpDiff = Math.abs(DisplayMetrics.DEVICE_DENSITY - density);
if (tmpDiff == 0) {
packageDensityScale = 1.0f;
break;
}
// prefer higher density (appScale>1.0), unless that's only option.
if (tmpDiff < minDiff && packageDensityScale < 1.0f) {
packageDensityScale = DisplayMetrics.DEVICE_DENSITY / (float) density;
minDiff = tmpDiff;
}
}
}
if (packageDensityScale > 0.0f) {
mApplicationScale = packageDensityScale;
} else {
mApplicationScale = DisplayMetrics.DEVICE_DENSITY / (float) DisplayMetrics.DEFAULT_DENSITY;
}
mApplicationInvertedScale = 1.0f / mApplicationScale;
mScalingRequired = mApplicationScale != 1.0f;
}
private CompatibilityInfo() {
mApplicationScale = mApplicationInvertedScale = 1.0f;
mExpandable = mConfiguredExpandable = true;
mScalingRequired = false;
}
@Override
public String toString() {
return "CompatibilityInfo{scale=" + mApplicationScale +
", expandable=" + mExpandable + "}";
}
}
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