检测是否在 Android 辅助功能设置中启用了“高对比度”

Question

如何检测是否在辅助功能设置中启用了“高对比度”设置（适用于 Android 5.0+）？

Answer 1

在类中AccessibilityManager（请参阅此处的源代码），您有一个名为的公共方法isHighTextContrastEnabled，您可以使用它来获取信息：

/**
 * Returns if the high text contrast in the system is enabled.
 * <p>
 * <strong>Note:</strong> You need to query this only if you application is
 * doing its own rendering and does not rely on the platform rendering pipeline.
 * </p>
 *
 * @return True if high text contrast is enabled, false otherwise.
 *
 * @hide
 */
public boolean isHighTextContrastEnabled() {
    synchronized (mLock) {
        IAccessibilityManager service = getServiceLocked();
        if (service == null) {
            return false;
        }
        return mIsHighTextContrastEnabled;
    }
}

因此，在您的代码中，您可以通过这样做来访问此方法（如果您位于Activity）：

AccessibilityManager am = (AccessibilityManager) this.getSystemService(Context.ACCESSIBILITY_SERVICE);
boolean isHighTextContrastEnabled = am.isHighTextContrastEnabled();