版本更新是获取本地版本号跟服务器版本号进行对比,当有更新的时候服务器会上传新的APK文件,
并且版本号是比没更新的版本号要大的,因此就是版本号的比较来确定是否需要更新。当需要更新
的时候就通过启动后台服务来更新。介绍一下各个知识点:
//获取本地的版本号
private int getVersionCode(){
PackageManager packageManager=getPackageManager();
try {
PackageInfo packageInfo=packageManager.getPackageInfo(getPackageName(), 0);
int versionCode=packageInfo.versionCode;
return versionCode;
} catch (NameNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return -1;
}
调用上面方法返回的就是本地版本号。
private void checkVersion() {
final long startTime=System.currentTimeMillis();
new Thread(){
public void run(){
HttpURLConnection conn=null;
Message msg=Message.obtain();
try {
URL url=new URL(GlobalUrl.VERSION_URL);
conn=(HttpURLConnection) url.openConnection();
conn.setRequestMethod("POST");
conn.setConnectTimeout(5000);
conn.setReadTimeout(5000);
conn.connect();
int responseCode=conn.getResponseCode();
if(responseCode==200){
InputStream inputStream=conn.getInputStream();
ByteArrayOutputStream out=new ByteArrayOutputStream();
int len=0;
byte []buffer=new byte[1024];
while((len=inputStream.read(buffer))!=-1){
out.write(buffer, 0, len);
}
inputStream.close();
out.close();
String result=out.toString();
System.out.println("VersionResult:"+result);
String success = null;
try {
JSONObject jo=new JSONObject(result);
success=jo.getString("success");
System.out.println(success);
} catch (JSONException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
Gson gson=new Gson();
if(success.equals("true")){
versionData=gson.fromJson(result,VersionData.class);
version=versionData.version;
mVersionName=version.releaseCode; //版本描述
mVersionCode=version.releaseNumber; //服务器版本号
mDesc=version.releaseNotes; //更新内容
mDownloadUrl=version.app; //下载新的APP的地址
//这里服务器返回的是String类型的版本号,其实版本号应该是int类型的
//然后判断版本号是否一致
if(!mVersionCode.equals(getVersionCode()+"")){
msg.what=CODE_UPDATE_DIALOG;
}else{
msg.what=CODE_ENTER_HOME;
}
}
}
}catch (MalformedURLException e) {
//url错误
msg.what=CODE_URL_ERROR;
e.printStackTrace();
}catch (IOException e) {
//网络错误
msg.what=CODE_NET_ERROR;
e.printStackTrace();
}finally{
long endTime=System.currentTimeMillis();
long timeUsed=endTime-startTime;
if(timeUsed<2000){
try {
Thread.sleep(2000-timeUsed);
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
handler.sendMessage(msg);
if(conn!=null){
//关闭网络连接
conn.disconnect();
}
}
}
}.start();
}
//handler处理对应的消息
private Handler handler=new Handler(){
public void handleMessage(Message msg) {
switch (msg.what) {
case CODE_UPDATE_DIALOG:
//弹窗是否需要更新
showUpDataDialog();
break;
case CODE_ENTER_HOME:
//进入下个页面。即使忽略更新
jumpNextPage();
break;
case CODE_URL_ERROR:
jumpNextPage();
break;
case CODE_NET_ERROR:
jumpNextPage();
break;
case CODE_JSON_ERROR:
jumpNextPage();
break;
default:
break;
}
};
};
获取服务器版本号就是网络请求服务器的数据,得到版本号以及版本描述和新版本的下载地址,将服务器的
版本号跟本地版本号进行对比。大于本地版本号或者跟本地版本号不一致则弹窗提示是否需要更新。
弹窗代码如下:
protected void showUpDataDialog() {
AlertDialog.Builder builder=new AlertDialog.Builder(this);
builder.setTitle("最新版本:"+mVersionName);
builder.setMessage(mDesc);
builder.setPositiveButton("稍后再说", new OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
jumpNextPage();
}
});
builder.setNegativeButton("立即更新", new OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
//启动服务
Intent intent=new Intent(SplashActivity.this,UpdateService.class);
intent.putExtra("appName", "CraveHome");
intent.putExtra("url",mDownloadUrl );
startService(intent);
jumpNextPage();
}
});
可以看到取消就直接进入主页面,即使忽略更新。确定就是启动我们的服务来下载最新的APP进行安装。
启动服务需要先新建一个服务。如下:
public class UpdateService extends Service{
private String appName;
private String url;
String target;
//通知栏
private Notification notification=null;
private NotificationManager notificationManager = null;
// 通知栏跳转Intent
private Intent updateIntent = null;
private PendingIntent pendingIntent = null;
Notification.Builder builder1;
@Override
public IBinder onBind(Intent intent) {
return null;
}
@SuppressLint("NewApi") @Override
public int onStartCommand(Intent intent, int flags, int startId) {
appName=intent.getStringExtra("appName");
url=intent.getStringExtra("url");
//创建下载APK的路径
if(Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)){
target=Environment.getExternalStorageDirectory().getAbsolutePath()+"/crave.apk";
}
notificationManager = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);
builder1 = new Notification.Builder(this);
builder1.setSmallIcon(R.drawable.ic_launch); //设置图标
builder1.setTicker("CraveHome开始下载");
builder1.setContentTitle(appName); //设置标题
builder1.setContentText("正在下载:"); //消息内容
builder1.setWhen(System.currentTimeMillis()); //发送时间
// builder1.setDefaults(Notification.DEFAULT_ALL); //设置默认的提示音,振动方式,灯光
builder1.setAutoCancel(true);//打开程序后图标消失
// // 设置下载过程中,点击通知栏,回到主界面
// updateIntent = new Intent(this, MainActivity.class);
// pendingIntent =PendingIntent.getActivity(this, 0, updateIntent, 0);
// builder1.setContentIntent(pendingIntent);
notification = builder1.build();
// 通过通知管理器发送通知֪
notificationManager.notify(124, notification);
if(url!=null){
downLoad(url);
}
return super.onStartCommand(intent, flags, startId);
}
private void downLoad(String url) {
HttpUtils utils=new HttpUtils();
utils.download(url, target, new RequestCallBack() {
@Override
public void onStart() {
System.out.println("CraveHome开始下载");
super.onStart();
}
@SuppressLint("NewApi") @Override
public void onLoading(long total, long current, boolean isUploading) {
System.out.println("正在下载:"+current * 100 / total);
builder1.setContentText("正在下载:"+current * 100 / total+"/100"); //消息内容
if(current==total){
builder1.setContentText("下载完成");
builder1.setDefaults(Notification.DEFAULT_ALL); //设置默认的提示音,振动方式,灯光
}
notification = builder1.build();
notificationManager.notify(124, notification); //通过通知管理器发送通知
super.onLoading(total, current, isUploading);
}
@Override
public void onSuccess(ResponseInfo arg0) {
System.out.println("arg0:"+arg0.result);
Intent intent=new Intent(Intent.ACTION_VIEW);
intent.addCategory(Intent.CATEGORY_DEFAULT);
intent.setDataAndType(Uri.fromFile(arg0.result), "application/vnd.android.package-archive");
//在BroadcastReceiver和Service中startActivity要加上此设置
intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
startActivity(intent);
// 结束service
stopSelf();
}
@Override
public void onFailure(HttpException arg0, String arg1) {
System.out.println(arg1);
// 结束service
stopSelf();
}
});
}
@Override
public void onDestroy() {
System.out.println("serviceDestroy");
super.onDestroy();
}
}
然后不要忘记了要在manifest里面进行注册:
当然还需要网络访问权限以及文件操作权限:
以上就是此文内容!
附上Demo下载链接:http://download.csdn.net/detail/qq_30219217/9639022