沉浸式状态栏

原文：https://www.jianshu.com/p/dc20e98b9a90

写的沉浸式很详细，下面是我个人用的：

public class MainActivity extends AppCompatActivity {
  @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);



      fullScreen(MainActivity.this);
      addStatusViewWithColor(MainActivity.this,Color.parseColor("#125cdc"));

    }
    /**
     * 添加状态栏占位视图
     *
     * @param activity
     */
    private void addStatusViewWithColor(Activity activity, int color) {
        ViewGroup contentView = (ViewGroup) activity.findViewById(android.R.id.content);
        View statusBarView = new View(activity);
        ViewGroup.LayoutParams lp = new ViewGroup.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT,
                getStatusBarHeight());
        statusBarView.setBackgroundColor(color);
        contentView.addView(statusBarView, lp);
    }

    /**
     * 利用反射获取状态栏高度
     * @return
     */
    public int getStatusBarHeight() {
        int result = 0;
        //获取状态栏高度的资源id
        int resourceId = getResources().getIdentifier("status_bar_height", "dimen", "android");
        if (resourceId > 0) {
            result = getResources().getDimensionPixelSize(resourceId);
        }
        return result;
    }


    /**
     * 通过设置全屏，设置状态栏透明
     *
     * @param activity
     */
    private void fullScreen(Activity activity) {
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {
            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
                //5.x开始需要把颜色设置透明，否则导航栏会呈现系统默认的浅灰色
                Window window = activity.getWindow();
                View decorView = window.getDecorView();
                //两个 flag 要结合使用，表示让应用的主体内容占用系统状态栏的空间
                int option = View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN
                        | View.SYSTEM_UI_FLAG_LAYOUT_STABLE;
                decorView.setSystemUiVisibility(option);
                window.addFlags(WindowManager.LayoutParams.FLAG_DRAWS_SYSTEM_BAR_BACKGROUNDS);
                window.setStatusBarColor(Color.TRANSPARENT);
                //导航栏颜色也可以正常设置
//                window.setNavigationBarColor(Color.TRANSPARENT);
            } else {
                Window window = activity.getWindow();
                WindowManager.LayoutParams attributes = window.getAttributes();
                int flagTranslucentStatus = WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS;
                int flagTranslucentNavigation = WindowManager.LayoutParams.FLAG_TRANSLUCENT_NAVIGATION;
                attributes.flags |= flagTranslucentStatus;
//                attributes.flags |= flagTranslucentNavigation;
                window.setAttributes(attributes);
            }
        }
    }


}