界面适配华为手机的虚拟按键的解决方案

if (AndroidWorkaround.checkDeviceHasNavigationBar(this)) {
AndroidWorkaround.assistActivity(findViewById(android.R.id.content));
}

/**
* 解决底部屏幕按键适配
* Created by Mercury on 2016/10/25.
*/
public class AndroidWorkaround {

public static void assistActivity(View content) {
new AndroidWorkaround(content);
}

private View mChildOfContent;
private int usableHeightPrevious;
private ViewGroup.LayoutParams frameLayoutParams;

private AndroidWorkaround(View content) {
mChildOfContent = content;
mChildOfContent.getViewTreeObserver().addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() {
public void onGlobalLayout() {
possiblyResizeChildOfContent();
}
});
frameLayoutParams = mChildOfContent.getLayoutParams();
}

private void possiblyResizeChildOfContent() {
int usableHeightNow = computeUsableHeight();
if (usableHeightNow != usableHeightPrevious) {

frameLayoutParams.height = usableHeightNow;
mChildOfContent.requestLayout();
usableHeightPrevious = usableHeightNow;
}
}

private int computeUsableHeight() {
Rect r = new Rect();
mChildOfContent.getWindowVisibleDisplayFrame(r);
return (r.bottom);
}

public static boolean checkDeviceHasNavigationBar(Context context) {
boolean hasNavigationBar = false;
Resources rs = context.getResources();
int id = rs.getIdentifier("config_showNavigationBar", "bool", "android");
if (id > 0) {
hasNavigationBar = rs.getBoolean(id);
}
try {
Class systemPropertiesClass = Class.forName("android.os.SystemProperties");
Method m = systemPropertiesClass.getMethod("get", String.class);
String navBarOverride = (String) m.invoke(systemPropertiesClass, "qemu.hw.mainkeys");
if ("1".equals(navBarOverride)) {
hasNavigationBar = false;
} else if ("0".equals(navBarOverride)) {
hasNavigationBar = true;
}
} catch (Exception e) {

}
return hasNavigationBar;

}

}