Android实现自定义加载框的代码示例

app在与服务器进行网络交互的时候，需要有一个提示的加载框，如图：

此时我们可以自定义一个加载中的对话框，代码如下：

public class loadingdialog extends dialog { 
private static final int change_title_what = 1; 
private static final int chnage_title_delaymillis = 300; 
private static final int max_suffix_number = 3; 
private static final char suffix = '.'; 
 
 
private imageview iv_route; 
private textview detail_tv; 
private textview tv_point; 
private rotateanimation manim; 
 
 
private handler handler = new handler() { 
private int num = 0; 
 
 
public void handlemessage(android.os.message msg) { 
if (msg.what == change_title_what) { 
stringbuilder builder = new stringbuilder(); 
if (num >= max_suffix_number) { 
num = 0; 
} 
num++; 
for (int i = 0; i < num; i++) { 
builder.append(suffix); 
} 
tv_point.settext(builder.tostring()); 
if (isshowing()) { 
handler.sendemptymessagedelayed(change_title_what, chnage_title_delaymillis); 
} 
else { 
num = 0; 
} 
} 
}; 
}; 
 
 
public loadingdialog(context context) { 
super(context, r.style.dialog_bocop); 
init(); 
} 
 
 
public loadingdialog(context context, boolean istrans) { 
super(context, istrans ? r.style.loading_dialog_trans : r.style.dialog_bocop); 
init(); 
} 
 
 
private void init() { 
setcontentview(r.layout.common_dialog_loading_layout); 
iv_route = (imageview) findviewbyid(r.id.iv_route); 
detail_tv = (textview) findviewbyid(r.id.detail_tv); 
tv_point = (textview) findviewbyid(r.id.tv_point); 
initanim(); 
getwindow().setwindowanimations(r.anim.alpha_in); 
} 
 
 
private void initanim() { 
// manim = new rotateanimation(360, 0, animation.restart, 0.5f, animation.restart, 0.5f); 
manim = new rotateanimation(0, 360, animation.restart, 0.5f, animation.restart, 0.5f); 
manim.setduration(2000); 
manim.setrepeatcount(animation.infinite); 
manim.setrepeatmode(animation.restart); 
manim.setstarttime(animation.start_on_first_frame); 
} 
 
 
@override 
public void show() {//在要用到的地方调用这个方法 
iv_route.startanimation(manim); 
handler.sendemptymessage(change_title_what); 
super.show(); 
} 
 
 
@override 
public void dismiss() { 
manim.cancel(); 
super.dismiss(); 
} 
 
 
@override 
public void settitle(charsequence title) { 
if (textutils.isempty(title)) { 
detail_tv.settext("正在加载"); 
} 
else { 
detail_tv.settext(title); 
} 
} 
 
 
@override 
public void settitle(int titleid) { 
settitle(getcontext().getstring(titleid)); 
} 
 
 
public static void dismissdialog(loadingdialog loadingdialog) { 
if (null == loadingdialog) { return; } 
loadingdialog.dismiss(); 
} 
} 

-------------对应的布局如下------------------  

<?xml version="1.0" encoding="utf-8"?> 
  <linearlayout 
  xmlns:android="http://schemas.android.com/apk/res/android" 
    android:layout_width="160dp" 
    android:layout_height="160dp" 
    android:layout_gravity="center" 
    android:background="@drawable/common_show_dialog" 
    android:orientation="vertical" > 
 
 
    <relativelayout 
      android:layout_width="fill_parent" 
      android:layout_height="0dp" 
      android:layout_weight="3" 
      android:paddingtop="22dp" 
      android:gravity="center" > 
 
 
      <imageview 
        android:id="@+id/iv_route" 
        android:layout_width="wrap_content" 
        android:layout_height="wrap_content" 
        android:layout_centerhorizontal="true" 
        android:layout_centervertical="true" 
        android:background="@drawable/dialog_bocop_loading_rotate_anim_img" /> 
    </relativelayout> 
 
 
    <relativelayout 
      android:layout_width="fill_parent" 
      android:layout_height="0dp" 
      android:layout_marginbottom="15dp" 
      android:layout_marginleft="10dp" 
      android:layout_marginright="10dp" 
      android:layout_weight="1" 
      android:gravity="center_horizontal" > 
 
 
      <textview 
        android:id="@+id/detail_tv" 
        android:layout_width="wrap_content" 
        android:layout_height="wrap_content" 
        android:layout_toleftof="@+id/tv_point" 
        android:ellipsize="marquee" 
        android:gravity="center" 
        android:singleline="true" 
        android:text="正在加载..." 
        android:textcolor="#ffffff" 
        android:textsize="20sp" /> 
 
 
      <textview 
        android:id="@+id/tv_point" 
        android:layout_width="20dp" 
        android:layout_height="wrap_content" 
        android:layout_alignparentright="true" 
        android:text="..." 
        android:textcolor="#ffffff" 
        android:textsize="20sp" /> 
    </relativelayout> 
  </linearlayout> 

比如在activity中要实现加载对话框调用 ：  

loadingdialog loadingdialog ; 
 
if (null == loadingdialog) { 
loadingdialog = new loadingdialog(aty); 
loadingdialog.setoncancellistener(this); 
} 
loadingdialog.settitle(“数据加载中”); 
if (!loadingdialog.isshowing()) loadingdialog.show(); 

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。