Android 网络加载通用Loading

为了用户体验用好，App在网络请求时通常都会显示个进度显示圈圈，提示用户耐心等待，最脍炙人口的莫过于登录啦。

接下来我们就通过Dialog来实现，然后在BaseActivity，BaseFragment中提供方法供调用

先看看自定义的dialog

 package com.example.kbr.utils;

 import android.animation.ObjectAnimator;
 import android.animation.ValueAnimator;
 import android.app.Dialog;
 import android.content.Context;
 import android.os.Bundle;
 import android.support.annotation.NonNull;
 import android.support.annotation.Nullable;
 import android.support.v7.widget.AppCompatImageView;
 import android.view.animation.Animation;
 import android.widget.ImageView;

 /**
  * Created by keranbin on 2017/12/19.
  */

 public class LoadingDialog extends Dialog {
     private ObjectAnimator objectAnimator = null;
     private AppCompatImageView circle;
     private long duration = 2000;

     public LoadingDialog(@NonNull Context context) {
         super(context);
     }

     public LoadingDialog(@NonNull Context context, int themeResId) {
         super(context, themeResId);
     }

     protected LoadingDialog(@NonNull Context context, boolean cancelable, @Nullable OnCancelListener cancelListener) {
         super(context, cancelable, cancelListener);
     }

     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.dialog_loading);
     }

     @Override
     public void show() {
         super.show();
         startAnim();
         setOnDismissListener(dialog -> {
             endAnim();
         });
     }

     /**
      * 启动动画
      */
     private void startAnim() {
         setCanceledOnTouchOutside(false);
         circle = findViewById(R.id.loading);
         objectAnimator = ObjectAnimator.ofFloat(circle, "rotation", 0.0f, 360.0f);
         //设置动画时间
         objectAnimator.setDuration(duration);
         //设置动画重复次数，这里-1代表无限
         objectAnimator.setRepeatCount(Animation.INFINITE);
         //设置动画循环模式。
         objectAnimator.setRepeatMode(ValueAnimator.RESTART);
         objectAnimator.start();
     }

     /**
      * 结束动画
      */
     private void endAnim() {
         objectAnimator.end();
         objectAnimator = null;
         circle = null;
     }

 }

布局也非常简单

 <?xml version="1.0" encoding="utf-8"?>
 <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:app="http://schemas.android.com/apk/res-auto"
     android:layout_width="match_parent"
     android:layout_height="wrap_content"
     android:alpha="0.4"
     android:background="#000000"
     android:gravity="center"
     android:orientation="vertical"
     android:paddingBottom="20dp"
     android:paddingLeft="16dp"
     android:paddingRight="16dp"
     android:paddingTop="20dp">

     <android.support.v7.widget.AppCompatImageView
         android:id="@+id/loading"
         android:layout_width="48dp"
         android:layout_height="48dp"
         app:srcCompat="@drawable/loading" />
 </RelativeLayout>

BaseActivity,BaseFragment中提供方法

     private LoadingDialog dialog;

     public void showLoading(){
         if (dialog == null) {
             dialog = new LoadingDialog(this);
         }
         dialog.show();
     }

     public void clearLoading(){
         if (dialog != null) {
             dialog.dismiss();
         }
     }

在需要用到的地方调用即可

  showLoading();

         //执行网络耗时任务（这里时模拟）
         new Thread(new Runnable() {
             @Override
             public void run() {
                 try {
                     Thread.sleep(10000);
                     clearLoading();
                 } catch (InterruptedException e) {
                     e.printStackTrace();
                 }
             }
         }).start();