Android提示版本號更新操作流程
阿新 • • 發佈:2017-07-01
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Android提示版本號更新操作流程
2014年5月8日:
andorid的app應用中都會有版本號更新的操作,今天空暇的時候就花了點心思弄了一下。主要技術方面用到了AsyncTask異步載入、http協議、json解析、獲取版本號號等。。
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以下就來介紹一下大概的流程吧。首先呢:
activity_main.xml:
<Button android:id="@+id/chek_newest_version" android:layout_width="fill_parent" android:layout_height="wrap_content" android:layout_margin="5dip" android:text="檢測最新版本號"/>
這裏我就僅僅用了一個button了!
接下來mainactivity代碼:
啟動了異步載入來處理的,假設舊版本號小於新版本號號,就開始運行下載操作,否則就不更新!
一步步看吧!
public class MainActivity extends Activity { Button m_btnCheckNewestVersion; long m_newVerCode; //最新版的版本號號 String m_newVerName; //最新版的版本號名 String m_appNameStr; //下載到本地要給這個APP命的名字 Handler m_mainHandler; ProgressDialog m_progressDlg; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); //初始化相關變量 initVariable(); m_btnCheckNewestVersion.setOnClickListener(btnClickListener); } private void initVariable() { m_btnCheckNewestVersion = (Button)findViewById(R.id.chek_newest_version); m_mainHandler = new Handler(); m_progressDlg = new ProgressDialog(this); m_progressDlg.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL); // 設置ProgressDialog 的進度條是否不明白 false 就是不設置為不明白 m_progressDlg.setIndeterminate(false); m_appNameStr = "haha.apk"; } OnClickListener btnClickListener = new View.OnClickListener() { @Override public void onClick(View v) { // TODO Auto-generated method stub new checkNewestVersionAsyncTask().execute(); } }; class checkNewestVersionAsyncTask extends AsyncTask<Void, Void, Boolean> { @Override protected Boolean doInBackground(Void... params) { // TODO Auto-generated method stub if(postCheckNewestVersionCommand2Server()) { int vercode = Common.getVerCode(getApplicationContext()); // 用到前面第一節寫的方法 if (m_newVerCode > vercode) { return true; } else { return false; } } return false; } @Override protected void onPostExecute(Boolean result) { // TODO Auto-generated method stub if (result) {//假設有最新版本號 doNewVersionUpdate(); // 更新新版本號 }else { notNewVersionDlgShow(); // 提示當前為最新版本號 } super.onPostExecute(result); } @Override protected void onPreExecute() { // TODO Auto-generated method stub super.onPreExecute(); } } /** * 從服務器獲取當前最新版本號號,假設成功返回TURE,假設失敗。返回FALSE * @return */ private Boolean postCheckNewestVersionCommand2Server() { StringBuilder builder = new StringBuilder(); JSONArray jsonArray = null; try { // 構造POST方法的{name:value} 參數對 List<NameValuePair> vps = new ArrayList<NameValuePair>(); // 將參數傳入post方法中 vps.add(new BasicNameValuePair("action", "checkNewestVersion")); builder = Common.post_to_server(vps); Log.e("msg", builder.toString()); jsonArray = new JSONArray(builder.toString()); if (jsonArray.length()>0) { if (jsonArray.getJSONObject(0).getInt("id") == 1) { m_newVerName = jsonArray.getJSONObject(0).getString("verName"); m_newVerCode = jsonArray.getJSONObject(0).getLong("verCode"); return true; } } return false; } catch (Exception e) { Log.e("msg",e.getMessage()); m_newVerName=""; m_newVerCode=-1; return false; } } /** * 提示更新新版本號 */ private void doNewVersionUpdate() { int verCode = Common.getVerCode(getApplicationContext()); String verName = Common.getVerName(getApplicationContext()); String str= "當前版本號:"+verName+" Code:"+verCode+" ,發現新版本號:"+m_newVerName+ " Code:"+m_newVerCode+" ,是否更新?"; Dialog dialog = new AlertDialog.Builder(this).setTitle("軟件更新").setMessage(str) // 設置內容 .setPositiveButton("更新",// 設置確定button new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { m_progressDlg.setTitle("正在下載"); m_progressDlg.setMessage("請稍候..."); downFile(Common.UPDATESOFTADDRESS); //開始下載 } }) .setNegativeButton("暫不更新", new DialogInterface.OnClickListener() { public void onClick(DialogInterface dialog, int whichButton) { // 點擊"取消"button之後退出程序 finish(); } }).create();// 創建 // 顯示對話框 dialog.show(); } /** * 提示當前為最新版本號 */ private void notNewVersionDlgShow() { int verCode = Common.getVerCode(this); String verName = Common.getVerName(this); String str="當前版本號:"+verName+" Code:"+verCode+",/n已是最新版,無需更新!"; Dialog dialog = new AlertDialog.Builder(this).setTitle("軟件更新") .setMessage(str)// 設置內容 .setPositiveButton("確定",// 設置確定button new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { finish(); } }).create();// 創建 // 顯示對話框 dialog.show(); } private void downFile(final String url) { m_progressDlg.show(); new Thread() { public void run() { HttpClient client = new DefaultHttpClient(); HttpGet get = new HttpGet(url); HttpResponse response; try { response = client.execute(get); HttpEntity entity = response.getEntity(); long length = entity.getContentLength(); m_progressDlg.setMax((int)length);//設置進度條的最大值 InputStream is = entity.getContent(); FileOutputStream fileOutputStream = null; if (is != null) { File file = new File( Environment.getExternalStorageDirectory(), m_appNameStr); fileOutputStream = new FileOutputStream(file); byte[] buf = new byte[1024]; int ch = -1; int count = 0; while ((ch = is.read(buf)) != -1) { fileOutputStream.write(buf, 0, ch); count += ch; if (length > 0) { m_progressDlg.setProgress(count); } } } fileOutputStream.flush(); if (fileOutputStream != null) { fileOutputStream.close(); } down(); //告訴HANDER已經下載完畢了,能夠安裝了 } catch (ClientProtocolException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } } }.start(); } /** * 告訴HANDER已經下載完畢了,能夠安裝了 */ private void down() { m_mainHandler.post(new Runnable() { public void run() { m_progressDlg.cancel(); update(); } }); } /** * 安裝程序 */ void update() { Intent intent = new Intent(Intent.ACTION_VIEW); intent.setDataAndType(Uri.fromFile(new File(Environment .getExternalStorageDirectory(), m_appNameStr)), "application/vnd.android.package-archive"); startActivity(intent); } }
最後是Common.java類:
類似一個工具類。非常多方法都寫在這裏面。下載完畢後,開始運行安裝的操作!
public class Common { public static final String SERVER_IP="http://192.168.1.105/"; public static final String SERVER_ADDRESS=SERVER_IP+"try_downloadFile_progress_server/index.php";//軟件更新包地址 public static final String UPDATESOFTADDRESS=SERVER_IP+"try_downloadFile_progress_server/update_pakage/baidu.apk";//軟件更新包地址 /** * 向服務器發送查詢請求,返回查到的StringBuilder類型數據 * * @param ArrayList * <NameValuePair> vps POST進來的參值對 * @return StringBuilder builder 返回查到的結果 * @throws Exception */ public static StringBuilder post_to_server(List<NameValuePair> vps) { DefaultHttpClient httpclient = new DefaultHttpClient(); try { HttpResponse response = null; // 創建httpost.訪問本地服務器網址 HttpPost httpost = new HttpPost(SERVER_ADDRESS); StringBuilder builder = new StringBuilder(); httpost.setEntity(new UrlEncodedFormEntity(vps, HTTP.UTF_8)); response = httpclient.execute(httpost); // 運行 if (response.getEntity() != null) { // 假設服務器端JSON沒寫對。這句是會出異常。是運行只是去的 BufferedReader reader = new BufferedReader( new InputStreamReader(response.getEntity().getContent())); String s = reader.readLine(); for (; s != null; s = reader.readLine()) { builder.append(s); } } return builder; } catch (Exception e) { // TODO: handle exception Log.e("msg",e.getMessage()); return null; } finally { try { httpclient.getConnectionManager().shutdown();// 關閉連接 // 這兩種釋放連接的方法都能夠 } catch (Exception e) { // TODO Auto-generated catch block Log.e("msg",e.getMessage()); } } } /** * 獲取軟件版本號號 * @param context * @return */ public static int getVerCode(Context context) { int verCode = -1; try { //註意:"com.example.try_downloadfile_progress"相應AndroidManifest.xml裏的package="……"部分 verCode = context.getPackageManager().getPackageInfo( "com.example.try_downloadfile_progress", 0).versionCode; } catch (NameNotFoundException e) { Log.e("msg",e.getMessage()); } return verCode; } /** * 獲取版本號名稱 * @param context * @return */ public static String getVerName(Context context) { String verName = ""; try { verName = context.getPackageManager().getPackageInfo( "com.example.try_downloadfile_progress", 0).versionName; } catch (NameNotFoundException e) { Log.e("msg",e.getMessage()); } return verName; }
已經貼完成!
Android提示版本號更新操作流程