步驟:
1.檢測當前版本的信息AndroidManifest.xml-->manifest-->android:versionName。
2.從服務器獲取版本號(版本號存在於xml文件中)並與當前檢測到的版本進行匹配,如果不匹配,提示用戶進行升級,如果匹配則進入程序主界面。
3.當提示用戶進行版本升級時,如果用戶點擊了確定,系統將自動從服務器上下載並進行自動升級,如果點擊取消將進入程序主界面。
效果圖:
獲取當前程序的版本號:
[java]
- /*
- * 獲取當前程序的版本號
- */
- private String getVersionName() throws Exception{
- //獲取packagemanager的實例
- PackageManager packageManager = getPackageManager();
- //getPackageName()是你當前類的包名,0代表是獲取版本信息
- PackageInfo packInfo = packageManager.getPackageInfo(getPackageName(), 0);
- return packInfo.versionName;
- } 獲取服務器端的版本號:
[java]
- /*
- * 用pull解析器解析服務器返回的xml文件 (xml封裝了版本號)
- */
- public static UpdataInfo getUpdataInfo(InputStream is) throws Exception{
- XmlPullParser parser = Xml.newPullParser();
- parser.setInput(is, utf-8);//設置解析的數據源
- int type = parser.getEventType();
- UpdataInfo info = new UpdataInfo();//實體
- while(type != XmlPullParser.END_DOCUMENT ){
- switch (type) {
- case XmlPullParser.START_TAG:
- if(version.equals(parser.getName())){
- info.setVersion(parser.nextText()); //獲取版本號
- }else if (url.equals(parser.getName())){
- info.setUrl(parser.nextText()); //獲取要升級的APK文件
- }else if (description.equals(parser.getName())){
- info.setDescription(parser.nextText()); //獲取該文件的信息
- }
- break;
- }
- type = parser.next();
- }
- return info;
- } 從服務器下載apk:
[java]
- public static File getFileFromServer(String path, ProgressDialog pd) throws Exception{
- //如果相等的話表示當前的sdcard掛載在手機上並且是可用的
- if(Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)){
- URL url = new URL(path);
- HttpURLConnection conn = (HttpURLConnection) url.openConnection();
- conn.setConnectTimeout(5000);
- //獲取到文件的大小
- 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;
- //獲取當前下載量
- pd.setProgress(total);
- }
- fos.close();
- bis.close();
- is.close();
- return file;
- }
- else{
- return null;
- }
- }
匹配、下載、自動安裝:
[java]
- /*
- * 從服務器獲取xml解析並進行比對版本號
- */
- public class CheckVersionTask implements Runnable{
-
- public void run() {
- try {
- //從資源文件獲取服務器 地址
- String path = getResources().getString(R.string.serverurl);
- //包裝成url的對象
- URL url = new URL(path);
- HttpURLConnection conn = (HttpURLConnection) url.openConnection();
- conn.setConnectTimeout(5000);
- InputStream is =conn.getInputStream();
- info = UpdataInfoParser.getUpdataInfo(is);
-
- if(info.getVersion().equals(versionname)){
- Log.i(TAG,版本號相同無需升級);
- LoginMain();
- }else{
- Log.i(TAG,版本號不同 ,提示用戶升級 );
- Message msg = new Message();
- msg.what = UPDATA_CLIENT;
- handler.sendMessage(msg);
- }
- } catch (Exception e) {
- // 待處理
- Message msg = new Message();
- msg.what = GET_UNDATAINFO_ERROR;
- handler.sendMessage(msg);
- e.printStackTrace();
- }
- }
- }
-
- Handler handler = new Handler(){
-
- @Override
- public void handleMessage(Message msg) {
- // TODO Auto-generated method stub
- super.handleMessage(msg);
- switch (msg.what) {
- case UPDATA_CLIENT:
- //對話框通知用戶升級程序
- showUpdataDialog();
- break;
- case GET_UNDATAINFO_ERROR:
- //服務器超時
- Toast.makeText(getApplicationContext(), 獲取服務器更新信息失敗, 1).show();
- LoginMain();
- break;
- case DOWN_ERROR:
- //下載apk失敗
- Toast.makeText(getApplicationContext(), 下載新版本失敗, 1).show();
- LoginMain();
- break;
- }
- }
- };
-
- /*
- *
- * 彈出對話框通知用戶更新程序
- *
- * 彈出對話框的步驟:
- * 1.創建alertDialog的builder.
- * 2.要給builder設置屬性, 對話框的內容,樣式,按鈕
- * 3.通過builder 創建一個對話框
- * 4.對話框show()出來
- */
- protected void showUpdataDialog() {
- AlertDialog.Builder builer = new Builder(this) ;
- builer.setTitle(版本升級);
- builer.setMessage(info.getDescription());
- //當點確定按鈕時從服務器上下載 新的apk 然後安裝
- builer.setPositiveButton(確定, new OnClickListener() {
- public void onClick(DialogInterface dialog, int which) {
- Log.i(TAG,下載apk,更新);
- downLoadApk();
- }
- });
- //當點取消按鈕時進行登錄
- builer.setNegativeButton(取消, new OnClickListener() {
- public void onClick(DialogInterface dialog, int which) {
- // TODO Auto-generated method stub
- LoginMain();
- }
- });
- AlertDialog dialog = builer.create();
- dialog.show();
- }
-
- /*
- * 從服務器中下載APK
- */
- protected void downLoadApk() {
- final ProgressDialog pd; //進度條對話框
- pd = new ProgressDialog(this);
- pd.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);
- pd.setMessage(正在下載更新);
- pd.show();
- new Thread(){
- @Override
- public void run() {
- try {
- File file = DownLoadManager.getFileFromServer(info.getUrl(), pd);
- sleep(3000);
- installApk(file);
- pd.dismiss(); //結束掉進度條對話框
- } catch (Exception e) {
- Message msg = new Message();
- msg.what = DOWN_ERROR;
- handler.sendMessage(msg);
- e.printStackTrace();
- }
- }}.start();
- }
-
- //安裝apk
- protected void installApk(File file) {
- Intent intent = new Intent();
- //執行動作
- intent.setAction(Intent.ACTION_VIEW);
- //執行的數據類型
- intent.setDataAndType(Uri.fromFile(file), application/vnd.android.package-archive);
- startActivity(intent);
- }
-
- /*
- * 進入程序的主界面
- */
- private void LoginMain(){
- Intent intent = new Intent(this,MainActivity.class);
- startActivity(intent);
- //結束掉當前的activity
- this.finish();
- }
UpdataInfo:
[java]
- public class UpdataInfo {
- private String version;
- private String url;
- private String description;
- public String getVersion() {
- return version;
- }
- public void setVersion(String version) {
- this.version = version;
- }
- public String getUrl() {
- return url;
- }
- public void setUrl(String url) {
- this.url = url;
- }
- public String getDescription() {
- return description;
- }
- public void setDescription(String description) {
- this.description = description;
- }
- }
update.xml:
[html]
-
- 2.0
- http://192.168.1.187:8080/mobilesafe.apk
- 檢測到最新版本,請及時更新!
-