android 更新版本案例
思路：
在app启动时候去请求服务器上的app版本号，看是否大于本地版本号，本地版本号使用 SharedPreferences 方式保，当服务器版本号大于本地版本号就进行下载更新操作。
1、UpdateManager
package com.rfid.util; import java.io.File; import java.io.FileOutputStream; import java.io.IOException; import java.io.InputStream; import java.net.HttpURLConnection; import java.net.URL; import org.json.JSONException; import org.json.JSONObject; import com.UHF.scanlable.R; import com.squareup.okhttp.Call; import com.squareup.okhttp.OkHttpClient; import com.squareup.okhttp.Request; import com.squareup.okhttp.Response; import android.app.AlertDialog; import android.content.Context; import android.content.DialogInterface; import android.content.DialogInterface.OnClickListener; import android.content.Intent; import android.content.SharedPreferences; import android.net.Uri; import android.os.Handler; import android.os.Message; import android.view.LayoutInflater; import android.view.View; import android.widget.ProgressBar; import android.widget.Toast; public class UpdateManager { OkHttpClient okHttpClient = new OkHttpClient(); private Context mContext; private SharedPreferences preferences; private int version; private String apkName; private String apkUrl; private static final String URL ="http://localhost:8080/apkUpdateVersion/updateVersion.json"; private static final String savePath = "/sdcard/updateAPK/"; private String saveFileName = savePath; private ProgressBar mProgress; private static final int DOWNLOADING = 1; private static final int DOWNLOADED = 2; private static final int DOWNLOAD_FAILED = 3; private int progress; private boolean cancelFlag = false; private String updateDescription = "更新描述"; private boolean forceUpdate = true; private AlertDialog alertDialog1, alertDialog2; public UpdateManager(Context context) { this.mContext = context; } public void checkUpdate(){ final int localVersion = getLocalVersion(); Request request = new Request.Builder() .url(URL).build(); Call call = okHttpClient.newCall(request); call.enqueue(new com.squareup.okhttp.Callback() { @Override public void onResponse(Response response) throws IOException { String json = response.body().string(); try { JSONObject jsonObject = new JSONObject(json); version = jsonObject.getInt("version"); apkName = jsonObject.getString("apkName"); apkUrl = jsonObject.getString("apkUrl"); new Thread(new Runnable() { @Override public void run() { if(version > localVersion){ showNoticeDialog(version, localVersion); // Message msg = new Message(); // msg.what = 1; // mHandler.sendMessage(msg); } } }).start(); } catch (JSONException e) { e.printStackTrace(); } } @Override public void onFailure(com.squareup.okhttp.Request request, IOException ioexception) { } }); } //获取本地版本 private int getLocalVersion() { int version = VersionUtils.getLocalVersion(mContext);
return version; } public void showNoticeDialog(double serverVersion,double clientVersion) { if (serverVersion <= clientVersion) return; AlertDialog.Builder dialog = new AlertDialog.Builder(mContext); dialog.setTitle("发现新版本 ：" + serverVersion); dialog.setMessage(updateDescription); dialog.setPositiveButton("现在更新", new OnClickListener() { @Override public void onClick(DialogInterface arg0, int arg1) { arg0.dismiss(); showDownloadDialog(); } }).show(); if(forceUpdate==false){ dialog.setNegativeButton("待会更新", new OnClickListener() { @Override public void onClick(DialogInterface arg0, int arg1) { arg0.dismiss(); } }); } } public void showDownloadDialog(){ AlertDialog.Builder dialog = new AlertDialog.Builder(mContext); dialog.setTitle("正在更新"); final LayoutInflater inflater = LayoutInflater.from(mContext); View v = inflater.inflate(R.layout.update_progress, null); mProgress = (ProgressBar) v.findViewById(R.id.update_progressBar); dialog.setView(v); if(forceUpdate==false){ dialog.setNegativeButton("待会更新", new OnClickListener() { @Override public void onClick(DialogInterface arg0, int arg1) { arg0.dismiss(); cancelFlag = false; } }); } alertDialog2 = dialog.create(); alertDialog2.setCancelable(false); alertDialog2.show(); //下载apk downloadAPK(); } //下载apk public void downloadAPK(){ new Thread(new Runnable() { @Override public void run() { try { URL url = new URL(apkUrl); HttpURLConnection conn = (HttpURLConnection) url.openConnection(); conn.connect(); int length = conn.getContentLength(); InputStream is = conn.getInputStream(); File file = new File(savePath); if(!file.exists()){ file.mkdir(); } //修改保存apk名称 apk_v1.apk saveFileName = savePath + apkName+"_V"+ version+".apk"; String apkFile = saveFileName; File ApkFile = new File(apkFile); FileOutputStream fos = new FileOutputStream(ApkFile); int count = 0; byte buf[] = new byte[1024]; do{ int numread = is.read(buf); count += numread; progress = (int)(((float)count / length) * 100); mHandler.sendEmptyMessage(DOWNLOADING); if(numread <= 0){ mHandler.sendEmptyMessage(DOWNLOADED); break; } fos.write(buf, 0, numread); }while(!cancelFlag); fos.close(); is.close(); } catch (Exception e) { mHandler.sendEmptyMessage(DOWNLOAD_FAILED); e.printStackTrace(); } } }).start(); } private Handler mHandler = new Handler(){ @Override public void handleMessage(Message msg){ switch (msg.what){ case DOWNLOADING: mProgress.setProgress(progress); break; case DOWNLOADED: if (alertDialog2 != null) alertDialog2.dismiss(); //安装apk installAPK(); break; case DOWNLOAD_FAILED: Toast.makeText(mContext, "网络断开，请稍候再试", Toast.LENGTH_LONG).show(); break; default: break; } } }; public void installAPK(){ File apkFile = new File(saveFileName); if (!apkFile.exists()) { return; } Intent intent = new Intent(Intent.ACTION_VIEW); intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK); intent.setDataAndType(Uri.parse("file://" + apkFile.toString()), "application/vnd.android.package-archive"); mContext.startActivity(intent); //将服务版本保存到客户端 saveSeverVersion(); } }
2、VersionUtils
public class VersionUtils { public static int getLocalVersion(Context ctx) { int localVersion = 0; try { PackageInfo packageInfo = ctx.getApplicationContext() .getPackageManager() .getPackageInfo(ctx.getPackageName(), 0); localVersion = packageInfo.versionCode; Log.d("TAG", "当前版本号：" + localVersion); } catch (PackageManager.NameNotFoundException e) { e.printStackTrace(); } return localVersion; } /** * 获取本地软件版本号名称 */ public static String getLocalVersionName(Context ctx) { String localVersion = ""; try { PackageInfo packageInfo = ctx.getApplicationContext() .getPackageManager() .getPackageInfo(ctx.getPackageName(), 0); localVersion = packageInfo.versionName; Log.d("TAG", "当前版本名称：" + localVersion); } catch (PackageManager.NameNotFoundException e) { e.printStackTrace(); } return localVersion; } }
3、update_progress.xml
<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="fill_parent" android:layout_height="wrap_content" android:orientation="vertical" > <ProgressBar android:id="@+id/update_progressBar" android:layout_width="fill_parent" android:layout_height="wrap_content" style="?android:attr/progressBarStyleHorizontal" /> </LinearLayout>
4、MainActivity调用方式
@Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main_activity); UpdateManager manager = new UpdateManager(MainActivity.this); // 检查软件更新 manager.checkUpdate(); }
5、设置版本号
在manifest.xml文件中声明了versionCode和versionName，然后获取的时候发现本地versionCode一直是1，不管怎么改都没有用。
解决方法：
在AndroidStudio中版本号的声明是在 Module 的build.gradle文件中。在这边修改版本信息即可。
6、eclipse-android 开发工具 下载okhttp jar 包：
链接：https://pan.baidu.com/s/1qF-A93AuZf9weWsWQcyWrw 密码：19re
7、案例下载
https://files.cnblogs.com/coolszy/UpdateSoftDemo.rar
VersionUtils.getLocalVersion(mContext)
