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:
<?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>
然后在main.xml 把它include 进来
<?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>
主程序：
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();
}
}
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。
