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極客學院的學習記錄：

App 版本更新步驟：
1、checkUpdate（）//檢測版本是否需要更新
2、downLoadAPK（）//下載新版本的APP
3、installAPK（）//安裝新版本APP

分析：
1、線上線下版本號比對，判斷是否需要更新：
1）訪問服務器 請求服務器中App 版本信息。
2）查詢本地App版本信息。
2、是否更新：
1）有新版本需要更新：
使用對話框詢問用戶是否選擇更新
showNoticeDialog();
2)沒有新版本不更新：
提示：已經(jīng)是最新版本不需要更新。
3、更新：
downLoadAPK();
showDownLoadDialog() ;//顯示現(xiàn)在進度

4、安裝：installAPK;
使用Android自帶安裝方式安裝。

java Code：

package com.autoupdate.zyh;import java.io.File; import java.io.FileOutputStream; import java.io.InputStream; import java.net.HttpURLConnection; import java.net.URL;import org.json.JSONException; import org.json.JSONObject;import android.app.AlertDialog; import android.app.Dialog; import android.content.Context; import android.content.DialogInterface; import android.content.Intent; import android.content.DialogInterface.OnClickListener; import android.content.pm.PackageManager.NameNotFoundException; import android.net.Uri; import android.os.Environment; import android.os.Handler; import android.os.Message; import android.util.Log; import android.view.LayoutInflater; import android.view.View; import android.widget.ProgressBar; import android.widget.Toast;import com.android.volley.RequestQueue; import com.android.volley.Response.ErrorListener; import com.android.volley.Response.Listener; import com.android.volley.VolleyError; import com.android.volley.toolbox.JsonObjectRequest; import com.android.volley.toolbox.Volley;/*** @author zyh* @version 創(chuàng)建時間：2015年7月28日 上午9:10:31 類說明：*/ public class UpdateManager {private ProgressBar mProgressbar;private int mProgress;private Dialog mDownLoadDialog;private String mSavefilePath;// 下載的APK 保存地址private static final String path = "http://aps.yuandaitong.com/index.php?a=seed";private static final int DOWNLOADING = 1;// 加載中private static final int DOWNLOAD_FINISH = 2;// 加載完成private String mVersion_name; // APk名稱private String mVersion_code;// apk版本號private String mVersion_desc;// 更新版本描述private String mVersion_path;// 下載 Apk 地址private boolean mIsCancel;// 是否取消下載private Context mContext;private Handler mHandler = new Handler() {public void handleMessage(Message msg) {try {Log.i("volley", msg.toString());JSONObject jsonObj = (JSONObject) msg.obj;String jsonStr = jsonObj.getString("data");JSONObject obj = new JSONObject(jsonStr);mVersion_code = obj.getString("version_code");mVersion_desc = obj.getString("version_desc");mVersion_name = obj.getString("version_name");mVersion_path = obj.getString("version_path");if (isUpdate()) {showNoticeDialog();} else {Toast.makeText(mContext, "已經(jīng)是最新版本", 1).show();}Log.i("volley", mVersion_path);} catch (JSONException e) {e.printStackTrace();}};};private Handler mUpdateProgressHandler = new Handler() {public void handleMessage(Message msg) {switch (msg.what) {case DOWNLOADING:// 更新當前進度mProgressbar.setProgress(mProgress);break;case DOWNLOAD_FINISH:// 隱藏 下載對話框mDownLoadDialog.dismiss();// 安裝下載的apkinstallAPK();break;default:break;}};};public UpdateManager(Context context) {this.mContext = context;}/*** 檢測軟件是否需要更新*/public void checkUpdate() {RequestQueue requestQueue = Volley.newRequestQueue(mContext);JsonObjectRequest request = new JsonObjectRequest(path, null,new Listener<JSONObject>() {@Overridepublic void onResponse(JSONObject response) {Message msg = Message.obtain();msg.obj = response;mHandler.sendMessage(msg);}}, new ErrorListener() {@Overridepublic void onErrorResponse(VolleyError error) {}});requestQueue.add(request);}/** 與本地版本比較判斷是否需要更新* * @return*/protected boolean isUpdate() {int serverVersion = Integer.valueOf(mVersion_code);int localVersion = 1;try {localVersion = mContext.getPackageManager().getPackageInfo("com.autoupdate.zyh", 0).versionCode;} catch (NameNotFoundException e) {e.printStackTrace();}if (serverVersion > localVersion) {return true;}return false;}/** 有更新時提示對話框*/protected void showNoticeDialog() {AlertDialog.Builder dialog = new AlertDialog.Builder(mContext);dialog.setTitle("提示").setMessage("有新版發(fā)布，需要更新\n" + mVersion_desc).setNegativeButton("取消", new OnClickListener() {@Overridepublic void onClick(DialogInterface dialog, int which) {dialog.dismiss();}}).setPositiveButton("去更新", new OnClickListener() {@Overridepublic void onClick(DialogInterface dialog, int which) {showDownLoadDialog();dialog.dismiss();}}).create().show();}/** 顯示下載進度 的對話框*/protected void showDownLoadDialog() {View view = LayoutInflater.from(mContext).inflate(R.layout.dialog_progress, null);AlertDialog.Builder dialog = new AlertDialog.Builder(mContext);dialog.setTitle("下載中").setView(view);mProgressbar = (ProgressBar) view.findViewById(R.id.id_progress);dialog.setNegativeButton("取消", new OnClickListener() {@Overridepublic void onClick(DialogInterface dialog, int which) {// 取消對話框dialog.dismiss();mIsCancel = true;// 取消下載}});mDownLoadDialog = dialog.create();mDownLoadDialog.show();// TODO 下載APKdownLoadAPK();}/** 下載APK文件*/private void downLoadAPK() {new Thread() {public void run() {InputStream in = null;FileOutputStream out = null;try {if (Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)) {String SDpath = Environment.getExternalStorageDirectory() + File.separator;mSavefilePath = SDpath + "DownLoadAPKS";File dir = new File(mSavefilePath);if (!dir.exists()) {dir.mkdir();}HttpURLConnection conn = (HttpURLConnection) new URL(mVersion_path).openConnection();conn.setDoInput(true);conn.setDoOutput(true);conn.setConnectTimeout(30 * 1000);conn.connect();in = conn.getInputStream();int length = conn.getContentLength();File apkFile = new File(mSavefilePath, mVersion_name);out = new FileOutputStream(apkFile);int count = 0;byte[] buffer = new byte[1024];while (!mIsCancel) {int numRead = in.read(buffer);count += numRead;// 計算進度條當前位置mProgress = (int) ((float) count / length * 100);mUpdateProgressHandler.sendEmptyMessage(DOWNLOADING);// 下載完成if (numRead < 0) {mUpdateProgressHandler.sendEmptyMessage(DOWNLOAD_FINISH);break;}out.write(buffer, 0, numRead);}}} catch (Exception e) {e.printStackTrace();} finally {try {out.close();in.close();} catch (Exception e2) {}}};}.start();}private void installAPK() {File apkFile = new File(mSavefilePath, mVersion_name);if (!apkFile.exists()) {return;}Intent intent = new Intent(Intent.ACTION_VIEW);Uri uri = Uri.parse("file://" + apkFile.toString());intent.setDataAndType(uri, "application/vnd.android.package-archive");mContext.startActivity(intent);}}

Dialog.xml:

?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"android:layout_width="match_parent"android:layout_height="wrap_content"android:orientation="vertical" ><ProgressBarandroid:id="@+id/id_progress"style="?android:attr/progressBarStyleHorizontal"android:layout_width="match_parent"android:layout_height="wrap_content" /></LinearLayout>

說明：

（一）使用方式

public class MainActivity extends Activity {@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);new UpdateManager(this).checkUpdate();//看這里}}

（二）這是Volley 框架 具體的Jar包 在文章結(jié)尾的源碼中有 ，而且不需要積分。

/*** 檢測軟件是否需要更新*/public void checkUpdate() {RequestQueue requestQueue = Volley.newRequestQueue(mContext);JsonObjectRequest request = new JsonObjectRequest(path, null,new Listener<JSONObject>() {@Overridepublic void onResponse(JSONObject response) {Message msg = Message.obtain();msg.obj = response;mHandler.sendMessage(msg);}}, new ErrorListener() {@Overridepublic void onErrorResponse(VolleyError error) {}});requestQueue.add(request);}

免費源碼下載

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