android 版本更新

版本更新的点击事件

public void update(View v) {

dialog = new AlertDialog.Builder(MainActivity.this).setTitle("软件版本更新")

.setPositiveButton("确定", onclick)

.setNegativeButton("以后再说", null).create();

// 开启线程检查版本信息

new Thread(new CheckVersionTask()).start();

}

确定onclick点击事件

/**

* 立即更新的监听

*/

DialogInterface.OnClickListener onclick = new DialogInterface.OnClickListener() {

@Override

public void onClick(DialogInterface dialog, int which) {

handler.sendEmptyMessage(1);

}

};

线程中的CheckVersionTask()方法

public class CheckVersionTask implements Runnable {

public void run() {

try {

// 从资源文件获取服务器 地址

String path = "http://www.oschina.net/MobileAppVersion.xml";

// 包装成url的对象

URL url = new URL(path);

HttpURLConnection conn = (HttpURLConnection) url

.openConnection();

conn.setConnectTimeout(5000);

InputStream is = conn.getInputStream();

bean = UpdateTools.getUpdateBean(is);

// 当前版本号

int versionCode = MainActivity.this.getPackageManager()

.getPackageInfo(MainActivity.this.getPackageName(), 0).versionCode;

if (Integer.parseInt(bean.getVersionCode()) <= versionCode) {

Log.i("xxx", "版本号相同无需升级");

} else {

Log.i("xxxx", "版本号不同 ,提示用户升级 ");

handler.sendEmptyMessage(0);

}

} catch (Exception e) {

e.printStackTrace();

}

}

}
Handler中下载APK包
Handler handler = new Handler() {

public void handleMessage(android.os.Message msg) {

if (msg.what == 1) {

downLoadApk();

}

if(msg.what==0){

dialog.setMessage(bean.getUpdateLog());

dialog.show();

}

};

};
downLoadApk方法

/*

* 从服务器中下载APK

*/

protected void downLoadApk() {

final ProgressDialog pd; // 进度条对话框

pd = new ProgressDialog(this);

pd.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);

pd.setMessage("正在下载更新");

pd.show();

new Thread() {

@Override

public void run() {

try {

File file = getFileFromServer(bean.getDownloadUrl(), pd);

sleep(3000);

UpdateTools tools = new UpdateTools();

// 安装APk

tools.installApk(file, MainActivity.this);

pd.dismiss(); // 结束掉进度条对话框

} catch (Exception e) {

e.printStackTrace();

}

}

}.start();

}

/**

* 下载方法

*

* @param path

* @param pd

* @return

* @throws Exception

*/

public File getFileFromServer(String path, ProgressDialog pd)

throws Exception {

// 如果相等的话表示当前的sdcard挂载在手机上并且是可用的

if (Environment.getExternalStorageState().equals(

Environment.MEDIA_MOUNTED)) {

URL url = new URL(path);

HttpURLConnection conn = (HttpURLConnection) url.openConnection();

conn.setConnectTimeout(5000);

// 获取到文件的大小

pd.setMax(conn.getContentLength());

InputStream is = conn.getInputStream();

File file = new File(Environment.getExternalStorageDirectory(),

"updata.apk");

FileOutputStream fos = new FileOutputStream(file);

BufferedInputStream bis = new BufferedInputStream(is);

byte[] buffer = new byte[1024];

int len;

int total = 0;

while ((len = bis.read(buffer)) != -1) {

fos.write(buffer, 0, len);

total += len;

// 获取当前下载量

pd.setProgress(total);

}

fos.close();

bis.close();

is.close();

return file;

} else {

return null;

}

}

解析更新的数据和安装的方法

public static UpdateBean getUpdateBean(InputStream is) throws Exception {

XmlPullParser parser = Xml.newPullParser();

parser.setInput(is, "utf-8");// 设置解析的数据源

int type = parser.getEventType();

UpdateBean info = new UpdateBean();// 实体

while (type != XmlPullParser.END_DOCUMENT) {

switch (type) {

case XmlPullParser.START_TAG:

if ("versionCode".equals(parser.getName())) {

info.setVersionCode(parser.nextText()); // 获取版本号

} else if ("downloadUrl".equals(parser.getName())) {

info.setDownloadUrl(parser.nextText()); // 获取要升级的APK文件

} else if ("updateLog".equals(parser.getName())) {

info.setUpdateLog(parser.nextText()); // 获取该文件的信息

}

break;

}

type = parser.next();

}

return info;

}

// 安装apk

public static void installApk(File file,Context context) {

Intent intent = new Intent();

// 执行动作

intent.setAction(Intent.ACTION_VIEW);

// 执行的数据类型

intent.setDataAndType(Uri.fromFile(file),

"application/vnd.android.package-archive");// 编者按：此处Android应为android，否则造成安装不了

context.startActivity(intent);

};
权限
<uses-permission android:name="android.permission.INTERNET" />

<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />

<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />

<uses-permission android:name="android.permission.READ_PHONE_STATE" />

<uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />

<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />

<uses-permission android:name="android.permission.WRITE_SETTINGS" />