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

1 package com.example.kbr.utils; 2  3 import android.animation.ObjectAnimator; 4 import android.animation.ValueAnimator; 5 import android.app.Dialog; 6 import android.content.Context; 7 import android.os.Bundle; 8 import android.support.annotation.NonNull; 9 import android.support.annotation.Nullable;10 import android.support.v7.widget.AppCompatImageView;11 import android.view.animation.Animation;12 import android.widget.ImageView;13 14 /**15  * Created by keranbin on 2017/12/19.16  */17 18 public class LoadingDialog extends Dialog {19     private ObjectAnimator objectAnimator = null;20     private AppCompatImageView circle;21     private long duration = 2000;22 23     public LoadingDialog(@NonNull Context context) {24         super(context);25     }26 27     public LoadingDialog(@NonNull Context context, int themeResId) {28         super(context, themeResId);29     }30 31     protected LoadingDialog(@NonNull Context context, boolean cancelable, @Nullable OnCancelListener cancelListener) {32         super(context, cancelable, cancelListener);33     }34 35     @Override36     protected void onCreate(Bundle savedInstanceState) {37         super.onCreate(savedInstanceState);38         setContentView(R.layout.dialog_loading);39     }40 41 42     @Override43     public void show() {44         super.show();45         startAnim();46         setOnDismissListener(dialog -> {47             endAnim();48         });49     }50 51     /**52      * 启动动画53      */54     private void startAnim() {55         setCanceledOnTouchOutside(false);56         circle = findViewById(R.id.loading);57         objectAnimator = ObjectAnimator.ofFloat(circle, "rotation", 0.0f, 360.0f);58         //设置动画时间59         objectAnimator.setDuration(duration);60         //设置动画重复次数，这里-1代表无限61         objectAnimator.setRepeatCount(Animation.INFINITE);62         //设置动画循环模式。63         objectAnimator.setRepeatMode(ValueAnimator.RESTART);64         objectAnimator.start();65     }66 67 68     /**69      * 结束动画70      */71     private void endAnim() {72         objectAnimator.end();73         objectAnimator = null;74         circle = null;75     }76 77 }

布局也非常简单

1 
      2 
     
      14 15     
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BaseActivity,BaseFragment中提供方法

1     private LoadingDialog dialog; 2  3  4     public void showLoading(){ 5         if (dialog == null) { 6             dialog = new LoadingDialog(this); 7         } 8         dialog.show(); 9     }10 11 12     public void clearLoading(){13         if (dialog != null) {14             dialog.dismiss();15         }16     }

在需要用到的地方调用即可

1  showLoading(); 2  3         //执行网络耗时任务（这里时模拟） 4         new Thread(new Runnable() { 5             @Override 6             public void run() { 7                 try { 8                     Thread.sleep(10000); 9                     clearLoading();10                 } catch (InterruptedException e) {11                     e.printStackTrace();12                 }13             }14         }).start();