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锁定老帖子 主题:带更新内容提示的自动更新的一种实现
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作者 | 正文 |
发表时间:2011-01-06
最后修改:2011-01-06
思路如下: 1.实现一个只有程序安装后第一次打开时才会执行的方法,这样方便在配置文件PreferenceManager.getDefaultSharedPreferences(Context)中保存程序的一些信息,比如apk安装时间,这个值之后会和服务器上的apk修改时间做比较来判断是否要更新,如我这个例子里的showOnFirstLaunch(),程序入口活动JumpActivity onCreate时获取程序包信息中的versionCode版本代码号,如果与配置中保存的版本号不一致,表示安装新版后第一次打开程序,则执行之后的代代码片段,如保存当前版本号,设置新版已安装的值为true,多设了这个值的目的是,我们自动更新时虽然下载了新版本,但是没有对其安装,则打开旧版本时提示下载的更新没有被安装,给用户一个安装的选择。
JumpActivity.class
private void showOnFirstLaunch() { setContentView(R.layout.splash); try { PackageInfo info = getPackageManager().getPackageInfo(PACKAGE_NAME, 0); int currentVersion = info.versionCode; prefs = PreferenceManager.getDefaultSharedPreferences(this); int lastVersion = prefs.getInt(PreferencesActivity.KEY_HELP_VERSION_SHOWN, 0); if (currentVersion != lastVersion) {//安装好后第一次启动 //设置版本号 prefs.edit().putInt(PreferencesActivity.KEY_HELP_VERSION_SHOWN, currentVersion).commit(); prefs.edit().putBoolean(PreferencesActivity.KEY_LATEST_VERSION_INSTALL, true).commit(); File apk = new File(apkFile); if(apk.exists())apk.delete(); //显示关于对话框 Intent intent = new Intent(Intent.ACTION_VIEW); intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_WHEN_TASK_RESET); intent.setClassName(this, HelpActivity.class.getName()); startActivity(intent); finish(); }else {//不是第一次启动 //是否完成上次下载的更新的安装 if(!prefs.getBoolean(PreferencesActivity.KEY_LATEST_VERSION_INSTALL, true)){ new AlertDialog.Builder(JumpActivity.this) .setTitle(R.string.app_update_title) .setCancelable(false) .setMessage(R.string.app_update_not_install) .setPositiveButton(R.string.button_update_ok,new DialogInterface.OnClickListener() { public void onClick(DialogInterface dialog, int which) { File apk = new File(apkFile); if(apk.exists())install();//下载的文件存在则安装 else {//不存在则提示重新下载 Intent update = new Intent(JumpActivity.this,UpdateService.class); startService(update); } } }) .setNegativeButton(R.string.button_update_no,new DialogInterface.OnClickListener() { public void onClick(DialogInterface dialog, int which) { //如果放弃本次更新,将不再进行提示 prefs.edit().putBoolean(PreferencesActivity.KEY_LATEST_VERSION_INSTALL, true).commit(); Log.v(TAG, "129"); launchActivity(); } }) .show(); return; } launchActivity(); } } catch (PackageManager.NameNotFoundException e) { Log.w(TAG, e); } }
private void install() { Intent i = new Intent(); i.setAction(Intent.ACTION_VIEW); i.setDataAndType(Uri.fromFile(new File(apkFile)), "application/vnd.android.package-archive"); startActivity(i); } 这个例子做了一个简单的跳转功能,通过Integer.parseInt(Build.VERSION.SDK) >= 5来分别启动适合不同系统版本的活动,使程序可以兼容跟多的手机。
private void launchActivity(){ if (Integer.parseInt(Build.VERSION.SDK) >= CameraManager.VERSION_CODES_LEVEL) { intent = new Intent(this,BJFILE.class); }else { intent = new Intent(this,EarlyBJFILE.class); } startActivity(intent); finish(); } 2.在BJFILE或EarlyBJFILE活动中重我们使用一个Service来检查首否需要更新应用,当服务器上的apk文件的最后修改时间与程序配置文件中的最后修改时间不同,则表示发现新更新。
UpdateService.class
@Override public void onStart(Intent intent, int startId) { super.onStart(intent, startId); Log.v(TAG, "onStart"); new Thread(){ public void run(){ if(checkUpdate()){//如果有更新,则显示更新界面UpdateActivity,类似一个对话框 Intent update = new Intent(UpdateService.this,UpdateActivity.class); update.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK); update.putExtra(VERSITON, newVersion); startActivity(update); }else stopSelf(); } }.start(); } //可能是不存在该请求对象,返回的向应头中没有设置last-modified域,则取到的值为0 private long getLastModified() { try { URL url = new URL(UpdateActivity.updateURL); URLConnection con = (URLConnection) url.openConnection(); Log.v(TAG, "con.getLastModified()"+con.getLastModified()); return con.getLastModified(); } catch (MalformedURLException e) { e.printStackTrace(); Log.v(TAG, "MalformedURLException"); return 1; } catch (IOException e) { e.printStackTrace(); Log.v(TAG, "IOException"); return 2; } } //判断是否需要更新 private boolean checkUpdate(){ SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(this); long latest = prefs.getLong(PreferencesActivity.KEY_LATEST_VERSION, 0); newVersion = getLastModified(); Log.v(TAG, "latest=" + latest); Log.v(TAG, "newVersion=" + newVersion); if(newVersion>latest)return true; else return false; } 3.UpdateActivity的样式为
<style name="BackgroundOnly"> <item name="android:windowBackground">@null</item> <item name="android:windowContentOverlay">@null</item> <item name="android:windowAnimationStyle">@null</item> <item name="android:windowNoTitle">true</item> <item name="android:windowNoDisplay">true</item> <item name="android:windowIsFloating">true</item> </style> 源代码
import java.io.BufferedReader; import java.io.File; import java.io.FileOutputStream; import java.io.IOException; import java.io.InputStream; import java.io.InputStreamReader; import org.apache.http.HttpEntity; import org.apache.http.HttpResponse; import org.apache.http.client.ClientProtocolException; import org.apache.http.client.HttpClient; import org.apache.http.client.methods.HttpGet; import org.apache.http.impl.client.DefaultHttpClient; import android.app.Activity; import android.app.AlertDialog; import android.app.ProgressDialog; import android.content.DialogInterface; import android.content.Intent; import android.content.SharedPreferences; import android.net.Uri; import android.os.Bundle; import android.os.Environment; import android.os.Handler; import android.os.Message; import android.preference.PreferenceManager; import android.util.Log; public class UpdateActivity extends Activity{ private static String TAG = "UpdateActivity"; public static String updateURL = "http://www.bjnote.com/down4/bjnote.apk";//更新程序位置 private static String updateContentURL="http://www.bjnote.com/down4/bjnote.txt";//更新内容 private StringBuffer sb =null; private ProgressDialog download; private Handler mHandler; protected static final int GUI_STOP_NOTIFIER = 0x108; protected static final int GUI_THREADING_NOTIFIER = 0x109; protected static final int GUI_ERROR_NOTIFIER = 0x110; protected static final int GUI_IO_NOTIFIER = 0x111; protected static final int GUI_INTERRUPTED_NOTIFIER = 0x112; protected static final int GUI_PROGRESS_NOTIFIER = 0x113;//开始进度条的进度值显示 protected static final int GUI_UPDATE_CONTENT_NOTIFIER = 0x114;//有更新文本 private int count = 0; private long total; private DownThread downThread; private UpdateContent updateContent; private SharedPreferences prefs; private long newVersion; private String apkFile = Environment.getExternalStorageDirectory()+"/bjfile.apk"; class DownThread extends Thread{ private boolean cancel=false; private File file; public void run() { HttpClient client = new DefaultHttpClient(); HttpGet get = new HttpGet(updateURL); HttpResponse response = null; FileOutputStream fileOutputStream = null; InputStream is=null; try { response = client.execute(get); if(response.getStatusLine().getStatusCode()!=200) throw new IOException("StatusCode!=200"); HttpEntity entity = response.getEntity(); total = entity.getContentLength(); mHandler.sendEmptyMessage(GUI_PROGRESS_NOTIFIER); is = entity.getContent(); if (is != null) { file = new File(apkFile); fileOutputStream = new FileOutputStream(file); byte[] buf = new byte[1024]; int ch = -1; while ((ch = is.read(buf)) != -1) { if(cancel)throw new InterruptedException(); count+=ch; fileOutputStream.write(buf, 0, ch); mHandler.sendEmptyMessage(GUI_THREADING_NOTIFIER); } if(count==total)mHandler.sendEmptyMessage(GUI_STOP_NOTIFIER); fileOutputStream.flush(); if(fileOutputStream!=null)fileOutputStream.close(); } } catch (ClientProtocolException e) { e.printStackTrace(); mHandler.sendEmptyMessage(GUI_ERROR_NOTIFIER); if(file.exists())file.delete(); } catch (IOException e) { if(file.exists())file.delete(); e.printStackTrace(); mHandler.sendEmptyMessage(GUI_IO_NOTIFIER); } catch (InterruptedException e) { e.printStackTrace(); if(file.exists())file.delete(); mHandler.sendEmptyMessage(GUI_INTERRUPTED_NOTIFIER); } finally{ try { is.close(); } catch (IOException e1) { e1.printStackTrace(); } } } private void setCancel(boolean isCancel){ cancel = isCancel; } } //读取更新内容 class UpdateContent extends Thread{ public void run() { HttpClient client = new DefaultHttpClient(); HttpGet get = new HttpGet(updateContentURL); HttpResponse response = null; BufferedReader bis = null; try { response = client.execute(get); //添加更新提示 sb.append(UpdateActivity.this.getString(R.string.app_update_tip)); if(response.getStatusLine().getStatusCode()!=200){ throw new IOException("StatusCode!=200"); } HttpEntity entity = response.getEntity(); //XXX 可能需要改成其他的编码,Apple默认是gb2312 bis = new BufferedReader(new InputStreamReader(entity.getContent(),"gb2312")); String s=null; if (bis != null) { s=bis.readLine(); while (s!=null) { sb.append("\n"+s); s=bis.readLine(); } mHandler.sendEmptyMessage(GUI_UPDATE_CONTENT_NOTIFIER); bis.close(); } } catch (ClientProtocolException e) { e.printStackTrace(); stopService(); } catch (IOException e) { e.printStackTrace(); stopService(); } } } @Override public void onCreate(Bundle bundle) { super.onCreate(bundle); Log.v(TAG, "onCreate"); mHandler = new Handler() { public void handleMessage(Message msg) { switch(msg.what) { case GUI_THREADING_NOTIFIER: download.setProgress(count); break; case GUI_STOP_NOTIFIER: download.dismiss(); prefs.edit().putLong(PreferencesActivity.KEY_LATEST_VERSION, newVersion).commit(); //表示已下载但还未安装 prefs.edit().putBoolean(PreferencesActivity.KEY_LATEST_VERSION_INSTALL, false).commit(); new AlertDialog.Builder(UpdateActivity.this) .setCancelable(false) .setTitle(R.string.app_update_title) .setMessage(R.string.button_update_finish) .setPositiveButton(R.string.button_ok,new DialogInterface.OnClickListener() { public void onClick(DialogInterface dialog, int which) { install(); } }) .setNegativeButton(R.string.button_exit, new DialogInterface.OnClickListener() { public void onClick(DialogInterface dialog, int which) { stopService(); } }) .show(); break; case GUI_IO_NOTIFIER: case GUI_ERROR_NOTIFIER: if(download!=null)download.dismiss(); new AlertDialog.Builder(UpdateActivity.this) .setCancelable(false) .setMessage(R.string.app_update_error) .setPositiveButton(R.string.button_exit,new DialogInterface.OnClickListener() { public void onClick(DialogInterface dialog, int which) { stopService(); } }) .show(); break; case GUI_INTERRUPTED_NOTIFIER: download.dismiss(); new AlertDialog.Builder(UpdateActivity.this) .setCancelable(false) .setMessage(R.string.app_update_cancel) .setPositiveButton(R.string.button_exit,new DialogInterface.OnClickListener() { public void onClick(DialogInterface dialog, int which) { stopService(); //如果放弃本次更新,将不再进行提示 prefs.edit().putLong(PreferencesActivity.KEY_LATEST_VERSION, newVersion).commit(); prefs.edit().putBoolean(PreferencesActivity.KEY_LATEST_VERSION_INSTALL, true).commit(); } }) .show(); break; case GUI_PROGRESS_NOTIFIER: download.setMax((int) total); download.setProgress(0); break; case GUI_UPDATE_CONTENT_NOTIFIER: download(); break; } } }; newVersion = getIntent().getLongExtra(UpdateService.VERSITON, 0); prefs = PreferenceManager.getDefaultSharedPreferences(this); sb = new StringBuffer(); updateContent = new UpdateContent(); updateContent.start(); } private void install() { Intent i = new Intent(); i.setAction(Intent.ACTION_VIEW); i.setDataAndType(Uri.fromFile(new File(apkFile)), "application/vnd.android.package-archive"); startActivity(i); } private void download() { downThread = new DownThread(); new AlertDialog.Builder(this) .setTitle(R.string.app_update_title) .setCancelable(false) .setMessage(sb.toString()) .setPositiveButton(R.string.button_update_ok,new DialogInterface.OnClickListener() { public void onClick(DialogInterface dialog, int which) { download = new ProgressDialog(UpdateActivity.this); download.setMessage(getString(R.string.app_update_warn)); download.setCancelable(false); download.setIndeterminate(false); download.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL); download.setButton(getString(R.string.button_cancel), new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { downThread.setCancel(true); } }); download.show(); downThread.start(); } }) .setNegativeButton(R.string.button_update_no, new DialogInterface.OnClickListener() { public void onClick(DialogInterface dialog, int which) { stopService(); prefs.edit().putLong(PreferencesActivity.KEY_LATEST_VERSION, newVersion).commit(); prefs.edit().putBoolean(PreferencesActivity.KEY_LATEST_VERSION_INSTALL, true).commit(); } }) .show(); } /** * stopSelf,服务关闭自身 */ private void stopService() { Intent stop = new Intent(this,UpdateService.class); stopService(stop); Log.v(TAG, "stopService"); finish(); Log.v(TAG, "finish activity"); } @Override public void onDestroy() { super.onDestroy(); prefs=null; Log.v(TAG, "onDestroy"); } } 声明:ITeye文章版权属于作者,受法律保护。没有作者书面许可不得转载。
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发表时间:2011-01-06
很好很详细,多谢
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发表时间:2011-01-06
我也刚刚做了一个相关的东西,有机会可以交流下
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发表时间:2011-01-09
自己逻辑很清楚,就是表述出来不太清楚
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发表时间:2011-04-17
老大,能发下源码吗?谢谢.paladin383@gmail.com
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发表时间:2011-11-18
正在搞个类似功能,学习一下!
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发表时间:2012-01-01
lz能够发下源码!十分感谢,kangjie1209@126.com
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