Android 虚拟按键栏的处理方案

最近在公司的项目中 , 华为用户反馈出了一个问题 , 华为手机底部有虚拟按键栏把应用的底部内容遮挡住了 , 现在已经把这个问题解决了 , 记录一下,给各位遇到相同问题的童鞋做一下参考.

处理虚拟按键栏工具类:

public class ScreenUtils {
//获取虚拟按键的高度
public static int getNavigationBarHeight(Context context) {
int result = 0;
if (hasNavBar(context)) {
Resources res = context.getResources();
int resourceId = res.getIdentifier("navigation_bar_height", "dimen", "android");
if (resourceId > 0) {
result = res.getDimensionPixelSize(resourceId);
}
}
return result;
}

/**
* 检查是否存在虚拟按键栏
*
* @param context
* @return
*/
@TargetApi(Build.VERSION_CODES.ICE_CREAM_SANDWICH)
public static boolean hasNavBar(Context context) {
Resources res = context.getResources();//读取系统资源函数
int resourceId = res.getIdentifier("config_showNavigationBar", "bool", "android");//获取资源id
if (resourceId != 0) {
boolean hasNav = res.getBoolean(resourceId);
// check override flag
String sNavBarOverride = getNavBarOverride();
if ("1".equals(sNavBarOverride)) {
hasNav = false;
} else if ("0".equals(sNavBarOverride)) {
hasNav = true;
}
return hasNav;
} else { // fallback
return !ViewConfiguration.get(context).hasPermanentMenuKey();
}
}

/**
* 判断虚拟按键栏是否重写
* @return
*/
private static String getNavBarOverride() {
String sNavBarOverride = null;
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {
try {
Class c = Class.forName("android.os.SystemProperties");
Method m = c.getDeclaredMethod("get", String.class);
m.setAccessible(true);
sNavBarOverride = (String) m.invoke(null, "qemu.hw.mainkeys");
} catch (Throwable e) {
}
}
return sNavBarOverride;
}
}

调用工具类方法 , 获取虚拟按键高度:

//处理虚拟按键
//判断用户手机机型是否有虚拟按键栏                  if(ScreenUtils.hasNavBar(getApplicationContext())){
setNavigationBar();
}

//处理虚拟按键
private void setNavigationBar() {
int barHeight = ScreenUtils.getNavigationBarHeight(getApplicationContext());
LinearLayout.LayoutParams barParams = new LinearLayout.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT,ViewGroup.LayoutParams.WRAP_CONTENT);
TextView tv = new TextView(this);
tv.setHeight(barHeight);
tv.setWidth(ViewGroup.LayoutParams.MATCH_PARENT);
tv.setBackgroundColor(Color.BLACK);
llNavigationBar.addView(tv,barParams);
}
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