网上有很这方面的解决方案，我要分享的是相对简单实用的一种方案，适合救急可直接放入项目中使用，希望能帮助到您，只需要几步就能解决（亲测绝对靠谱可放心在项目中使用兼容19以下）。

话不多说干货来了

1.自定义主题在styles.xml中

<style name="AppTheme" parent="Theme.AppCompat.Light.NoActionBar">
        <item name="colorPrimary">@color/title_bar</item>
        <item name="colorPrimaryDark">@color/title_bar</item>
        <item name="colorAccent">@color/colorAccent</item>
</style>

2.状态栏兼容类

public class StatusBarCompat {

    private static final int INVALID_VAL = -1;
    private static final int COLOR_DEFAULT = Color.parseColor("#20000000");

    @TargetApi(Build.VERSION_CODES.LOLLIPOP)
    public static void compat(Activity activity, int statusColor) {

        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
            if (statusColor != INVALID_VAL) {
                activity.getWindow().setStatusBarColor(statusColor);
            }
            return;
        }

        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT && Build.VERSION.SDK_INT < Build.VERSION_CODES.LOLLIPOP) {
            int color = COLOR_DEFAULT;
            ViewGroup contentView = (ViewGroup) activity.findViewById(android.R.id.content);
            if (statusColor != INVALID_VAL) {
                color = statusColor;
            }
            View statusBarView = contentView.getChildAt(0);
            //改变颜色时避免重复添加statusBarView
            if (statusBarView != null && statusBarView.getMeasuredHeight() == getStatusBarHeight(activity)) {
                statusBarView.setBackgroundColor(color);
                return;
            }
            statusBarView = new View(activity);
            ViewGroup.LayoutParams lp = new ViewGroup.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT,
                    getStatusBarHeight(activity));
            statusBarView.setBackgroundColor(color);
            contentView.addView(statusBarView, lp);
        }
    }

    public static void compat(Activity activity) {
        compat(activity, INVALID_VAL);
    }

    public static int getStatusBarHeight(Context context) {
        int result = 0;
        int resourceId = context.getResources().getIdentifier("status_bar_height", "dimen", "android");
        if (resourceId > 0) {
            result = context.getResources().getDimensionPixelSize(resourceId);
        }
        return result;
    }
}

3.创建Activity、FragmentActivity基类方便其它页面继承

public class BaseActivity extends Activity{

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setStatusBar(this);
    }

    /**
     * 设置状态颜色
     * @param act
     */
    public void setStatusBar(Activity act){
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT
                && Build.VERSION.SDK_INT < Build.VERSION_CODES.LOLLIPOP) {
            getWindow().addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
        }
        StatusBarCompat.compat(act, Color.parseColor("#34A8E5"));
    }

    @Override
    public void onWindowFocusChanged(boolean hasFocus) {
        if(hasFocus){
            setStatusBar(this);
        }
        super.onWindowFocusChanged(hasFocus);
    }
}

public  class BaseFragmentActivity extends FragmentActivity{

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setStatusBar(this);
    }

    /**
     * 设置状态颜色
     * @param act
     */
    public void setStatusBar(Activity act){
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT
                && Build.VERSION.SDK_INT < Build.VERSION_CODES.LOLLIPOP) {
            getWindow().addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
        }
        StatusBarCompat.compat(act, Color.parseColor("#34A8E5"));
    }

    @Override
    public void onWindowFocusChanged(boolean hasFocus) {
        if(hasFocus){
            setStatusBar(this);
        }
        super.onWindowFocusChanged(hasFocus);
    }
}

4.页面布局中需要加入　android:fitsSystemWindows="true"属性

下面给出我的测试效果图：

H64X3O(GGW)8WPPAAAF0X3S.png