Android 在低版本4.4以上 动态设置状态栏和底部导航栏的背景色

一，xml 布局

二，MainActivity 方法

public class MainActivity extends AppCompatActivity {

private Toolbar mToolbar;@Overrideprotected void onCreate(Bundle savedInstanceState) {    super.onCreate(savedInstanceState);    //判断版本,如果[4.4,5.0)就设置状态栏和导航栏为透明    if (isFitVerson()) {        getWindow().addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);        //设置虚拟导航栏为透明        getWindow().addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_NAVIGATION);    }    setContentView(R.layout.activity_main3);    mToolbar = (Toolbar) findViewById(R.id.toolbar);    //解决低版本4.4+的虚拟导航栏的    View nav = findViewById(R.id.navagation);    setSupportActionBar(mToolbar);    setOrChangeTranslucentColor(mToolbar, nav, Color.BLUE);}@SuppressLint("NewApi")public void setOrChangeTranslucentColor(Toolbar toolbar, View bottomNavigationBar, int translucentPrimaryColor) {    //判断版本,如果[4.4,5.0)就设置状态栏和导航栏为透明    if (isFitVerson()) {        if (toolbar != null) {            //1.先设置toolbar的高度            ViewGroup.LayoutParams params = toolbar.getLayoutParams();            int statusBarHeight = getStatusBarHeight();            params.height += statusBarHeight;            toolbar.setLayoutParams(params);            //2.设置paddingTop，以达到状态栏不遮挡toolbar的内容。            toolbar.setPadding(                    toolbar.getPaddingLeft(),                    toolbar.getPaddingTop() + getStatusBarHeight(),                    toolbar.getPaddingRight(),                    toolbar.getPaddingBottom());            //设置顶部的颜色            toolbar.setBackgroundColor(translucentPrimaryColor);        }        if (bottomNavigationBar != null) {            //解决低版本4.4+的虚拟导航栏的            if (hasNavigationBarShow(getWindowManager())) {                ViewGroup.LayoutParams p = bottomNavigationBar.getLayoutParams();                p.height += getNavigationBarHeight();                bottomNavigationBar.setLayoutParams(p);                //设置底部导航栏的颜色                bottomNavigationBar.setBackgroundColor(translucentPrimaryColor);            }        }    } else if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.LOLLIPOP) {        getWindow().setNavigationBarColor(translucentPrimaryColor);        getWindow().setStatusBarColor(translucentPrimaryColor);    } else {        //<4.4的，不做处理    }}//判断是否是合适的低版本private boolean isFitVerson() {    return android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.KITKAT            && android.os.Build.VERSION.SDK_INT < android.os.Build.VERSION_CODES.LOLLIPOP;}/** * 判断是否有导航栏 * @param wm * @return */@RequiresApi(api = Build.VERSION_CODES.JELLY_BEAN_MR1)private boolean hasNavigationBarShow(WindowManager wm){    Display display = wm.getDefaultDisplay();    DisplayMetrics outMetrics = new DisplayMetrics();    //获取整个屏幕的高度    display.getRealMetrics(outMetrics);    int heightPixels = outMetrics.heightPixels;    int widthPixels = outMetrics.widthPixels;    //获取内容展示部分的高度    outMetrics = new DisplayMetrics();    display.getMetrics(outMetrics);    int heightPixels2 = outMetrics.heightPixels;    int widthPixels2 = outMetrics.widthPixels;    LogUtils.e(heightPixels);    LogUtils.e(heightPixels2);    int w = widthPixels-widthPixels2;    int h = heightPixels-heightPixels2;    LogUtils.e(h);    return  w>0||h>0;//竖屏和横屏两种情况。}/** * 获取状态栏的高度 * * @return */private int getStatusBarHeight() {    return getSystemComponentDimen("status_bar_height");}//虚拟导航栏的private int getNavigationBarHeight() {    return getSystemComponentDimen("navigation_bar_height");}public int getSystemComponentDimen(String dimenName) {    /**     * 获取状态栏高度——方法1     * */    int statusBarHeight1 = -1;    //获取status_bar_height资源的ID    (String name, String defType, String defPackage)    int resourceId = getResources().getIdentifier(dimenName, "dimen", "android");    if (resourceId > 0) {        //根据资源ID获取响应的尺寸值        statusBarHeight1 = getResources().getDimensionPixelSize(resourceId);    }    return statusBarHeight1;}

}