Android Market的 Loading成效_Android

Android Market的 Loading效果

android

进度条

设置

对话框

it

分类： Android开发

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?{
????
????private?LinearLayout?mLoadingLayout;

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????public?void?onCreate(Bundle?savedInstanceState)?{
????????super.onCreate(savedInstanceState);
????????setContentView(R.layout.main);
????????
????????final?Handler?handler?=?new?Handler(){

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????????????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:

?public class ProgressBar3 extends Activity {

??? ProgressDialog mDialog1;
??? ProgressDialog mDialog2;

??? private static final int DIALOG1_KEY = 0;
??? private static final int DIALOG2_KEY = 1;

??? @Override
??? protected void onCreate(Bundle savedInstanceState) {
??????? super.onCreate(savedInstanceState);

??????? setContentView(R.layout.progressbar_3);

??????? Button button = (Button) findViewById(R.id.showIndeterminate);
??????? button.setOnClickListener(new View.OnClickListener() {
??????????? public void onClick(View v) {
??????????????? showDialog(DIALOG1_KEY);
??????????? }
??????? });

??????? button = (Button) findViewById(R.id.showIndeterminateNoTitle);
??????? button.setOnClickListener(new View.OnClickListener() {
??????????? public void onClick(View v) {
??????????????? showDialog(DIALOG2_KEY);
??????????? }
??????? });
??? }

??? @Override
??? protected Dialog onCreateDialog(int id) {
??????? switch (id) {
??????????? case DIALOG1_KEY: {
??????????????? ProgressDialog dialog = new ProgressDialog(this);
??????????????? dialog.setTitle("Indeterminate");
??????????????? dialog.setMessage("Please wait while loading...");
??????????????? dialog.setIndeterminate(true);
??????????????? dialog.setCancelable(true);
??????????????? return dialog;
??????????? }
??????????? case DIALOG2_KEY: {
??????????????? ProgressDialog dialog = new ProgressDialog(this);
??????????????? dialog.setMessage("Please wait while loading...");
??????????????? dialog.setIndeterminate(true);
??????????????? dialog.setCancelable(true);
??????????????? return dialog;
??????????? }
??????? }
??????? return null;
??? }
}

package com.yarin.android.TestOnPDialog;

import android.app.Activity;
import android.app.ProgressDialog;
import android.content.DialogInterface;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;

public class PDialog extends Activity
{
??? private Button mButton01,mButton02;
??
??? int m_count = 0;
??? //声明进度条对话框
??? ProgressDialog m_pDialog;
??
??? @Override
??? public void onCreate(Bundle savedInstanceState)
??? {
??????? super.onCreate(savedInstanceState);
??????? setContentView(R.layout.main);
??????
??????? //得到按钮对象
??????? mButton01 = (Button)findViewById(R.id.Button01);
??????? mButton02 = (Button)findViewById(R.id.Button02);
??????
??????? //设置mButton01的事件监听
??????? mButton01.setOnClickListener(new Button.OnClickListener() {
??????????? @Override
??????????? public void onClick(View v)
??????????? {
??????????????? // TODO Auto-generated method stub
??????????????
??????????????? //创建ProgressDialog对象
??????????????? m_pDialog = new ProgressDialog(PDialog.this);

??????????????? // 设置进度条风格，风格为圆形，旋转的
??????????????? m_pDialog.setProgressStyle(ProgressDialog.STYLE_SPINNER);

??????????????? // 设置ProgressDialog 标题
??????????????? m_pDialog.setTitle("提示");
??????????????
??????????????? // 设置ProgressDialog 提示信息
??????????????? m_pDialog.setMessage("这是一个圆形进度条对话框");

??????????????? // 设置ProgressDialog 标题图标
??????????????? m_pDialog.setIcon(R.drawable.img1);

??????????????? // 设置ProgressDialog 的进度条是否不明确
??????????????? m_pDialog.setIndeterminate(false);
??????????????
??????????????? // 设置ProgressDialog 是否可以按退回按键取消
??????????????? m_pDialog.setCancelable(true);
??????????????
??????????????? // 设置ProgressDialog 的一个Button
??????????????? m_pDialog.setButton("确定", new DialogInterface.OnClickListener() {
??????????????????? public void onClick(DialogInterface dialog, int i)
??????????????????? {
??????????????????????? //点击“确定按钮”取消对话框
??????????????????????? dialog.cancel();
??????????????????? }
??????????????? });

??????????????? // 让ProgressDialog显示
??????????????? m_pDialog.show();
??????????? }
??????? });
??????
????? //设置mButton02的事件监听
??????? mButton02.setOnClickListener(new Button.OnClickListener() {
??????????? @Override
??????????? public void onClick(View v)
??????????? {
??????????????? // TODO Auto-generated method stub
??????????????
??????????????? m_count = 0;
??????????????
??????????????? // 创建ProgressDialog对象
??????????????? m_pDialog = new ProgressDialog(PDialog.this);
??????????????
??????????????? // 设置进度条风格，风格为长形
??????????????? m_pDialog.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);
??????????????
??????????????? // 设置ProgressDialog 标题
??????????????? m_pDialog.setTitle("提示");
??????????????
??????????????? // 设置ProgressDialog 提示信息
??????????????? m_pDialog.setMessage("这是一个长形对话框进度条");
??????????????
??????????????? // 设置ProgressDialog 标题图标
??????????????? m_pDialog.setIcon(R.drawable.img2);
??????????????
??????????????? // 设置ProgressDialog 进度条进度
??????????????? m_pDialog.setProgress(100);
??????????????
??????????????? // 设置ProgressDialog 的进度条是否不明确
??????????????? m_pDialog.setIndeterminate(false);
??????????????
??????????????? // 设置ProgressDialog 是否可以按退回按键取消
??????????????? m_pDialog.setCancelable(true);
??????????????
??????????????? // 让ProgressDialog显示
??????????????? m_pDialog.show();
??????????????
??????????????? new Thread()
??????????????? {
??????????????????? public void run()
??????????????????? {
??????????????????????? try
??????????????????????? {
??????????????????????????? while (m_count <= 100)
??????????????????????????? {
??????????????????????????????? // 由线程来控制进度。
??????????????????????????????? m_pDialog.setProgress(m_count++);
??????????????????????????????? Thread.sleep(100);
??????????????????????????? }
??????????????????????????? m_pDialog.cancel();
??????????????????????? }
??????????????????????? catch (InterruptedException e)
??????????????????????? {
??????????????????????????? m_pDialog.cancel();
??????????????????????? }
??????????????????? }
??????????????? }.start();
??????????????
??????????? }
??????? });
??? }
}

转自：http://blog.sina.com.cn/s/blog_4d9d0a8b0100pqgf.html