android loading通过方法调用式

loadingUtil

package com.coral3.common_module.utils;

import android.app.Activity;
import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import com.coral3.common_module.R;

public class LoadingUtil {

    private static View loadingView;
    private static ViewGroup contentView;

    public static void startLoading(Context context){
        if(null == contentView) contentView = ((Activity)context).findViewById(android.R.id.content);
        if (loadingView == null) {
            loadingView = LayoutInflater.from(context).inflate(R.layout.view_loading, null, false);
            contentView.addView(loadingView);
        } else {
            loadingView.setVisibility(View.VISIBLE);
        }
    }

    public static void hideLoading(){
        if (loadingView != null) {
            loadingView.setVisibility(View.GONE);
        }
    }

    public static void startLoadingInUiThread(Context context){
        ((Activity)context).runOnUiThread(new Runnable() {
            @Override
            public void run() {
                startLoading(context);
            }
        });
    }

    public static void hideLoadingInUiThread(Activity activity){
        activity.runOnUiThread(new Runnable() {
            @Override
            public void run() {
                hideLoading();
            }
        });
    }
}

view_loading.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">

    <com.github.ybq.android.spinkit.SpinKitView xmlns:app="http://schemas.android.com/apk/res-auto"
        android:id="@+id/spin_kit"
        style="@style/SpinKitView.Large.Circle"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_centerInParent="true"
        android:background="@drawable/shape_loading_bg"
        android:padding="20dp"
        app:SpinKit_Color="@color/white" />
</RelativeLayout>