<?xml version="1.0" encoding="utf-8"?> 
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 
  android:id="@+id/dialog_view" 
  android:layout_width="fill_parent" 
  android:layout_height="fill_parent" 
  android:background="@drawable/dialog_load_bg" 
  android:gravity="center" 
  android:minHeight="100dp" 
  android:minWidth="190dp" 
  android:orientation="vertical" 
  android:padding="10dp" > 
 
  <ImageView 
    android:id="@+id/img" 
    android:layout_width="wrap_content" 
    android:layout_height="wrap_content" 
    android:src="@drawable/publicloading" /> 
 
  <TextView 
    android:id="@+id/tipTextView" 
    android:layout_width="wrap_content" 
    android:layout_height="wrap_content" 
    android:layout_marginLeft="10dp" 
    android:textColor="#acacac" 
    android:textSize="15sp" /> 
 
</LinearLayout> 

<?xml version="1.0" encoding="utf-8"?> 
<set android:shareInterpolator="false" xmlns:android="http://schemas.android.com/apk/res/android"> 
  <rotate  
    android:interpolator="@android:anim/linear_interpolator" 
    android:pivotX="50%" 
    android:pivotY="50%" 
    android:fromDegrees="0" 
    android:toDegrees="+360" 
    android:duration="1500" 
    android:startOffset="-1" 
    android:repeatMode="restart" 
    android:repeatCount="-1"/> 
</set> 

/** 
 * 公用的弹出框 
 * 
 * @author lining 
 */ 
public class LoadingDialog { 
 
  /** 
   * 得到自定义的progressDialog 
   * 
   * @param context 
   * @param msg 
   * @return 
   */ 
  public static Dialog createLoadingDialog(Context context, String msg) { 
 
    // 首先得到整个View 
    View view = LayoutInflater.from(context).inflate( 
        R.layout.loading_dialog_view, null); 
    // 获取整个布局 
    LinearLayout layout = (LinearLayout) view 
        .findViewById(R.id.dialog_view); 
    // 页面中的Img 
    ImageView img = (ImageView) view.findViewById(R.id.img); 
    // 页面中显示文本 
    TextView tipText = (TextView) view.findViewById(R.id.tipTextView); 
 
    // 加载动画，动画用户使img图片不停的旋转 
    Animation animation = AnimationUtils.loadAnimation(context, 
        R.anim.dialog_load_animation); 
    // 显示动画 
    img.startAnimation(animation); 
    // 显示文本 
    tipText.setText(msg); 
 
    // 创建自定义样式的Dialog 
    Dialog loadingDialog = new Dialog(context, R.style.loading_dialog); 
    // 设置返回键无效 
    loadingDialog.setCancelable(false); 
    loadingDialog.setContentView(layout, new LinearLayout.LayoutParams( 
        LinearLayout.LayoutParams.MATCH_PARENT, 
        LinearLayout.LayoutParams.MATCH_PARENT)); 
 
    return loadingDialog; 
  } 
} 

<!-- 自定义loading dialog --> 
;style name="loading_dialog" parent="android:style/Theme.Dialog"> 
 <item name="android:windowFrame">@null</item> 
 <item name="android:windowNoTitle">true</item> 
 <item name="android:windowBackground">@drawable/dialog_load_bg</item> 
 <item name="android:windowIsFloating">true</item> 
 <item name="android:windowContentOverlay">@null</item> 
;/style> 

BaseActivity（基类）中，方便随时调用。
/** 
 * 显示Dialog 
 */ 
private void showDialog() { 
  if (dialog == null) { 
    dialog = LoadingDialog.createLoadingDialog(this, "正在加载中..."); 
    dialog.show(); 
  } 
} 
 
/** 
 * 关闭Dialog 
 */ 
private void closeDialog() { 
  if (dialog != null) { 
    dialog.dismiss(); 
    dialog = null; 
  } 
}