android 版本检测与自动更新

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import java.io.File;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.net.URL;
import java.net.URLConnection;
import android.app.Activity;
import android.app.AlertDialog;
import android.app.ProgressDialog;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.pm.PackageInfo;
import android.content.pm.PackageManager.NameNotFoundException;
import android.net.ConnectivityManager;
import android.net.NetworkInfo;
import android.net.Uri;
import android.util.Log;
import android.webkit.URLUtil;
import com.hiyo.game.pdk.activity.R;
/**
* Android AutoUpdate.
*
* lazybone/2010.08.20
*
* 1.Set apkUrl.
*
* 2.check().
*
* 3.add delFile() method in resume()\onPause().
*/
public class MyAutoUpdate {
public Activity activity = null;
public int versionCode = 0;
public String versionName = "";
private static final String TAG = "AutoUpdate";
private String currentFilePath = "";
private String currentTempFilePath = "";
private String fileEx = "";
private String fileNa = "";
private String strURL = "http://127.0.0.1:81/ApiDemos.apk";
private ProgressDialog dialog;
public MyAutoUpdate(Activity activity) {
this.activity = activity;
getCurrentVersion();
}
public void check() {
if (isNetworkAvailable(this.activity) == false) {
return;
}
if (true) {// Check version.
showUpdateDialog();
}
}
public static boolean isNetworkAvailable(Context ctx) {
try {
ConnectivityManager cm = (ConnectivityManager) ctx
.getSystemService(Context.CONNECTIVITY_SERVICE);
NetworkInfo info = cm.getActiveNetworkInfo();
return (info != null && info.isConnected());
} catch (Exception e) {
e.printStackTrace();
return false;
}
}
public void showUpdateDialog() {
@SuppressWarnings("unused")
AlertDialog alert = new AlertDialog.Builder(this.activity)
.setTitle("Title")
.setIcon(R.drawable.icon)
.setMessage("Update or not?")
.setPositiveButton("Update",
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog,
int which) {
downloadTheFile(strURL);
showWaitDialog();
}
})
.setNegativeButton("Cancel",
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog,
int which) {
dialog.cancel();
}
}).show();
}
public void showWaitDialog() {
dialog = new ProgressDialog(activity);
dialog.setMessage("Waitting for update...");
dialog.setIndeterminate(true);
dialog.setCancelable(true);
dialog.show();
}
public void getCurrentVersion() {
try {
PackageInfo info = activity.getPackageManager().getPackageInfo(
activity.getPackageName(), 0);
this.versionCode = info.versionCode;
this.versionName = info.versionName;
} catch (NameNotFoundException e) {
e.printStackTrace();
}
}
private void downloadTheFile(final String strPath) {
fileEx = strURL.substring(strURL.lastIndexOf(".") + 1, strURL.length())
.toLowerCase();
fileNa = strURL.substring(strURL.lastIndexOf("/") + 1,
strURL.lastIndexOf("."));
try {
if (strPath.equals(currentFilePath)) {
doDownloadTheFile(strPath);
}
currentFilePath = strPath;
Runnable r = new Runnable() {
public void run() {
try {
doDownloadTheFile(strPath);
} catch (Exception e) {
Log.e(TAG, e.getMessage(), e);
}
}
};
new Thread(r).start();
} catch (Exception e) {
e.printStackTrace();
}
}
private void doDownloadTheFile(String strPath) throws Exception {
Log.i(TAG, "getDataSource()");
if (!URLUtil.isNetworkUrl(strPath)) {
Log.i(TAG, "getDataSource() It's a wrong URL!");
} else {
URL myURL = new URL(strPath);
URLConnection conn = myURL.openConnection();
conn.connect();
InputStream is = conn.getInputStream();
if (is == null) {
throw new RuntimeException("stream is null");
}
File myTempFile = File.createTempFile(fileNa, "." + fileEx);
currentTempFilePath = myTempFile.getAbsolutePath();
FileOutputStream fos = new FileOutputStream(myTempFile);
byte buf[] = new byte[128];
do {
int numread = is.read(buf);
if (numread <= 0) {
break;
}
fos.write(buf, 0, numread);
} while (true);
Log.i(TAG, "getDataSource() Download  ok...");
dialog.cancel();
dialog.dismiss();
openFile(myTempFile);
try {
is.close();
} catch (Exception ex) {
Log.e(TAG, "getDataSource() error: " + ex.getMessage(), ex);
}
}
}
private void openFile(File f) {
Intent intent = new Intent();
intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
intent.setAction(android.content.Intent.ACTION_VIEW);
String type = getMIMEType(f);
intent.setDataAndType(Uri.fromFile(f), type);
activity.startActivity(intent);
}
public void delFile() {
Log.i(TAG, "The TempFile(" + currentTempFilePath + ") was deleted.");
File myFile = new File(currentTempFilePath);
if (myFile.exists()) {
myFile.delete();
}
}
private String getMIMEType(File f) {
String type = "";
String fName = f.getName();
String end = fName
.substring(fName.lastIndexOf(".") + 1, fName.length())
.toLowerCase();
if (end.equals("m4a") || end.equals("mp3") || end.equals("mid")
|| end.equals("xmf") || end.equals("ogg") || end.equals("wav")) {
type = "audio";
} else if (end.equals("3gp") || end.equals("mp4")) {
type = "video";
} else if (end.equals("jpg") || end.equals("gif") || end.equals("png")
|| end.equals("jpeg") || end.equals("bmp")) {
type = "image";
} else if (end.equals("apk")) {
type = "application/vnd.android.package-archive";
} else {
type = "*";
}
if (end.equals("apk")) {
} else {
type += "/*";
}
return type;
}
}