1. 在Activity的onCreate()方法中添加代码

//设置状态栏透明
StatusBarUtil.setTranslucentStatus(this);
//设置透明状态栏的paddingTop为false
setRootViewFitsSystemWindows(this,false);

在使用中经常会遇到图标和标题栏重叠的情况，可以使用StatusBarHeightView这个控件填充状态栏上方的位置

package com.onepilltest.util;import android.content.Context;
import android.content.res.TypedArray;
import android.os.Build;
import android.support.annotation.Nullable;
import android.util.AttributeSet;
import android.widget.LinearLayout;import com.onepilltest.R;public class StatusBarHeightView extends LinearLayout {private int statusBarHeight;private int type;public StatusBarHeightView(Context context, @Nullable AttributeSet attrs) {super(context, attrs);init(attrs);}public StatusBarHeightView(Context context, @Nullable AttributeSet attrs, int defStyleAttr) {super(context, attrs, defStyleAttr);init(attrs);}public StatusBarHeightView(Context context, @Nullable AttributeSet attrs, int defStyleAttr, int defStyleRes) {super(context, attrs, defStyleAttr);init(attrs);}private void init(@Nullable AttributeSet attrs) {int resourceId = getResources().getIdentifier("status_bar_height", "dimen", "android");if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {if(resourceId>0) {statusBarHeight = getResources().getDimensionPixelSize(resourceId);}}else{//低版本 直接设置0statusBarHeight = 0;}if (attrs != null) {TypedArray typedArray = getContext().obtainStyledAttributes(attrs, R.styleable.StatusBarHeightView);type = typedArray.getInt(R.styleable.StatusBarHeightView_use_type, 0);typedArray.recycle();}if (type == 1) {setPadding(getPaddingLeft(), statusBarHeight, getPaddingRight(), getPaddingBottom());}}@Overrideprotected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {if (type == 0) {setMeasuredDimension(getDefaultSize(getSuggestedMinimumWidth(), widthMeasureSpec),statusBarHeight);} else {super.onMeasure(widthMeasureSpec, heightMeasureSpec);}}
}