加载动画

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


    <RelativeLayout
        android:layout_width="60dp"
        android:alpha="0.8"
        android:background="@drawable/ios_loading_bg"
        android:layout_height="60dp">
        
        <ImageView
            android:id="@+id/circle"
            android:layout_width="25dp"
            android:layout_centerInParent="true"
            android:src="@drawable/ios_loading"
            android:layout_height="25dp" />

    </RelativeLayout>


</LinearLayout>

<?xml version="1.0" encoding="utf-8"?>
<rotate xmlns:android="http://schemas.android.com/apk/res/android"
    android:duration="6000"
    android:fromDegrees="0"
    android:interpolator="@android:anim/linear_interpolator"
    android:pivotX="50%"
    android:pivotY="50%"
    android:repeatCount="infinite"
    android:toDegrees="+1800" />

package com.che300.price.component;

import android.app.Activity;
import android.app.ProgressDialog;
import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.animation.Animation;
import android.view.animation.AnimationUtils;
import android.widget.ImageView;
import android.widget.TextView;

import com.che300.price.R;

/**
 * Created by Administrator on 2016/7/25.
 */
public class SimpleLoadingDialog {
    ProgressDialog pd_;
    Context context_;
    View dialog;

    public SimpleLoadingDialog(Context context) {
        pd_ = new ProgressDialog(context, R.style.DialogStyle);
        context_ = context;
        initView();
    }

    private void initView() {
        dialog = LayoutInflater.from(context_).inflate(R.layout.ios_loading, null);
    }

    public void show() {
        if (context_ instanceof Activity) {
            if (((Activity) context_).isFinishing())
                return;
        }
        ImageView view1 = (ImageView) dialog.findViewById(R.id.circle);
        Animation anim = AnimationUtils.loadAnimation(context_, R.anim.laoding_circle);
        view1.startAnimation(anim);
        pd_.show();
        pd_.setContentView(dialog);
    }

    public void setCancelable(boolean cancelable) {
        pd_.setCancelable(cancelable);
    }

    public void dismiss() {
        if (context_ instanceof Activity) {
            if (((Activity) context_).isFinishing())
                return;
        }
        pd_.dismiss();
    }

    public void setMessage(String mess) {
        TextView message = (TextView) dialog.findViewById(R.id.textView1);
        message.setText(mess);
    }

    public boolean isShowing() {
        return pd_.isShowing();
    }

    public Context getContext(){
        return context_;
    }
}