android开发分享Android中创建一个透明的进度对话框实例

import android.os.bundle;
import android.os.handler;
import android.app.activity;
import android.app.dialog;
import android.content.context;
import android.view.gravity;
import android.view.view;
import android.view.view.onclicklistener;
import android.view.viewgroup.layoutparams;
import android.view.windowmanager;
import android.view.animation.animation;
import android.view.animation.linearinterpolator;
import android.view.animation.rotateanimation;
import android.widget.imageview;
import android.widget.linearlayout;

public class mainactivity extends activity implements onclicklistener {

 private transparentprogressdialog pd;
 private handler h;
 private runnable r;

 @override
 protected void oncreate(bundle savedinstancestate) {
  super.oncreate(savedinstancestate);
  setcontentview(r.layout.activity_main);
  h = new handler();
  pd = new transparentprogressdialog(this, r.drawable.spinner);
  r =new runnable() {
   @override
   public void run() {
    if (pd.isshowing()) {
     pd.dismiss();
    }
   }
  };
  findviewbyid(r.id.the_button).setonclicklistener(this);
 }

 @override
 public void onclick(view v) {
  pd.show();
  h.postdelayed(r,5000);
 }

 @override
 protected void ondestroy() {
  h.removecallbacks(r);
  if (pd.isshowing() ) {
   pd.dismiss();
  }
  super.ondestroy();
 }

}

 private imageview iv;

 public transparentprogressdialog(context context, int resourceidofimage) {
  super(context, r.style.transparentprogressdialog);
         windowmanager.layoutparams wlmp = getwindow().getattributes();
         wlmp.gravity = gravity.center_horizontal;
         getwindow().setattributes(wlmp);
  settitle(null);
  setcancelable(false);
  setoncancellistener(null);
  linearlayout layout = new linearlayout(context);
  layout.setorientation(linearlayout.vertical);
  linearlayout.layoutparams params = new linearlayout.layoutparams(layoutparams.match_parent, layoutparams.wrap_content);
  iv = new imageview(context);
  iv.setimageresource(resourceidofimage);
  layout.addview(iv, params);
  addcontentview(layout, params);
 }

 @override
 public void show() {
  super.show();
  rotateanimation anim = new rotateanimation(0.0f, 360.0f , animation.relative_to_self, .5f, animation.relative_to_self, .5f);
  anim.setinterpolator(new linearinterpolator());
  anim.setrepeatcount(animation.infinite);
  anim.setduration(3000);
  iv.setanimation(anim);
  iv.startanimation(anim);
 }
}