一行代码使Android状态栏变沉浸式透明化

public static void setStatusBarColor(Activity activity, int color) {
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {
        activity.getWindow().addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
        ViewGroup decorViewGroup = (ViewGroup) activity.getWindow().getDecorView();
        //获取自己布局的根视图 
        View rootView = ((ViewGroup) (decorViewGroup.findViewById(android.R.id.content))).getChildAt(0); //预留状态栏位置
       rootView.setFitsSystemWindows(true); //添加状态栏高度的视图布局，并填充颜色
        View statusBarTintView = new View(activity); 
        LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(LinearLayout.LayoutParams.MATCH_PARENT, 
                PhoneInfo.getInternalDimensionSize(activity.getResources(), "status_bar_height")); 
        params.gravity = Gravity.TOP; 
        statusBarTintView.setLayoutParams(params); 
        statusBarTintView.setBackgroundColor(color); 
        decorViewGroup.addView(statusBarTintView); 
        } 
} public static int getInternalDimensionSize(Resources res, String key) { 
    int result = 0; int resourceId = res.getIdentifier(key, "dimen", "android");
    if (resourceId > 0) { 
        result = res.getDimensionPixelSize(resourceId); 
        } 
            return result; 
         }
    }

以后就只需要在Activity中添加这一行代码，不用修改其他地方，第一个参数为Activity，第二个为颜色Id：

PhoneInfo.setStatusBarColor(this,getResources().getColor(android.R.color.holo_blue_light));

注意一定要设置在setContentView()方法之后，如：

setContentView(R.layout.layout);  
PhoneInfo.setStatusBarColor(this, getResources().getColor(R.color.blue));