本文实例讲述了android中market的loading效果实现方法。分享给大家供大家参考。具体如下：
在android中,要实现loading效果，一般情况下都使用progressdialog控件。apidemos/src/com/example/android/apis/view/progressbar3.java 提供两个demo:
仔细看了android market，发现却是不一样的，请看截图:
那到底如何实现呢？首先，我们创建一个布局文件,
res/layout/fullscreen_loading_indicator.xml, 其内容如下:
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<?xml version="1.0" encoding="utf-8"?>
<linearlayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:gravity="center_vertical|center_horizontal"
android:orientation="horizontal"
android:id="@+id/fullscreen_loading_style"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
>
<progressbar
android:layout_gravity="center_vertical"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
style="?android:attr/progressbarstylesmall"
/>
<textview
android:id="@+id/current_action"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginleft="5.0dip"
android:text="@+string/loading"
/>
</linearlayout>
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然后在main.xml 把它include 进来
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<?xml version="1.0" encoding="utf-8"?>
<linearlayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="fill_parent"
android:layout_height="fill_parent">
<linearlayout android:orientation="vertical"
android:id="@+id/main_info"
android:visibility="gone"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<textview android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:text="abc"></textview>
</linearlayout>
<linearlayout android:orientation="vertical"
android:id="@+id/main_loading"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<include android:visibility="visible"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
layout="@layout/fullscreen_loading_style" />
</linearlayout>
</linearlayout>
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主程序：
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package com.tymx.fullloading;
import android.app.activity;
import android.os.bundle;
import android.os.handler;
import android.os.message;
import android.view.view;
import android.widget.linearlayout;
public class myfullloading extends activity {
/** called when the activity is first created. */
private linearlayout mloadinglayout;
@override
public void oncreate(bundle savedinstancestate) {
super.oncreate(savedinstancestate);
setcontentview(r.layout.main);
final handler handler = new handler(){
@override
public void handlemessage(message msg) {
// todo auto-generated method stub
super.handlemessage(msg);
if (msg.what==1){
mloadinglayout = (linearlayout)findviewbyid(r.id.fullscreen_loading_style);
mloadinglayout.setvisibility(view.gone);
linearlayout mmain = (linearlayout)findviewbyid(r.id.main_info);
mmain.setvisibility(view.visible);
}
}
};
new thread(){
public void run(){
for (int i=0;i<1000;i++){
system.out.print(i+"");
}
message msg = handler.obtainmessage(1,"flash");
handler.sendmessage(msg);
}
}.start();
}
}
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运行的效果为:
希望本文所述对大家的android程序设计有所帮助。