Android软件开发

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:

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