#Android App升级的方案

一、介绍一下服务器的操作。

1.看看数据库表。

注意到force这参数，force=1，强制升级，force=0，自愿升级。

二、自选升级。

1.调用升级接口，查看version的版本号，如果版本号大于当前app的版本号，那么就触发显示升级对话框。代码如下：

      /**
 * 联网获取更新数据
 */
private void getUpdateInfo(){
Log.e("TAG", "FolderActivity getUpdateInfo");
Map<String,String> map=new HashMap<>();
map.put("flag","1");
CommonUtils.showProgress(this,"正在检查更新，请稍等...");
CommonUtils.Get(NetUrl.UPDATE_URL, map, new MyCallBack<String>() {

@Override
public void onSuccess(String result) {
//if(result.contains("data")){
CacheUtils.getInstance(MainActivity.this).getValue(NetUrl.UPDATE_URL, result);
CommonUtils.cancelProgress();
CacheUtils.getInstance(MainActivity.this).putValue(NetUrl.UPDATE_URL,result);
parseUpdateData(result);
}

@Override
public void onError(Throwable ex, boolean isOnCallback) {
CommonUtils.cancelProgress();
CommonUtils.showToast(MainActivity.this,getResources().getString(R.string.get_error_text));
}

});

}

/**
 * 解析更新数据
 * @param result
 */
private void parseUpdateData(String result) {
UpdateInfoBean updateInfoBean = CUtils.getGson().fromJson(result, UpdateInfoBean.class);
UpdateInfoBean.DataBean data = updateInfoBean.getData();
double versionName = Double.parseDouble(CommonUtils.getAppVersionName(this));
Log.e("TAG", ""+versionName+":"+data.getVersion());
if(versionName<data.getVersion()){
showUpdateDialog();
}else{
CommonUtils.showToast(this,"当前已经是最新版本！");
}

}

/**
 * 显示更新的对话框
 */
private void showUpdateDialog() {
Intent intent = new Intent(this, DownloadActivity.class);
startActivity(intent);
}

升级对话框如图：

2.在升级对话框中，点击立刻更新，会在后台的通知栏中更新，退出，可以正常退出。代码需要重新写了个service在后台运行。代码和截图如下，注意service要在配置文件中注册。

public class DownLoadService extends Service {
private static final String BASE_PATH = Environment.getExternalStorageDirectory().getPath() + File.separator;
private String path=BASE_PATH+"hrobbie"+"/hrobbie.apk";
private Notification.Builder builder;
private NotificationManager notificationManager;
private int number;
private Notification build;

@Nullable
@Override
public IBinder onBind(Intent intent) {
return null;
}

@Override
public void onCreate() {
super.onCreate();
notificationManager = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);
builder = new Notification.Builder(DownLoadService.this);
}

@Override
public int onStartCommand(Intent intent, final int flags, int startId) {
number = startId;
String download_url = intent.getStringExtra("download_url");
//downloadFile(download_url);
Log.e("TAG", "DownloadService download_url="+download_url);
Log.e("TAG", "DownloadService path="+path);
builder.setSmallIcon(R.mipmap.ic_launcher).setContentTitle("一款应用正在下载0%").setWhen(System.currentTimeMillis())
.setPriority(Notification.PRIORITY_MAX).setTicker("一款应用下载").setOngoing(false).setAutoCancel(true)
.setContentIntent(PendingIntent.getActivity(this, 0, new Intent(), 0));


downloadFile(download_url);



return super.onStartCommand(intent, flags, startId);

}

private void downloadFile(String download_url) {
RequestParams requestParams = new RequestParams(download_url);
requestParams.setAutoResume(true);
//requestParams.setAutoRename(true);//断点下载

requestParams.setSaveFilePath(path);


x.http().get(requestParams, new Callback.ProgressCallback<File>() {
@Override
public void onWaiting() {

}

@Override
public void onStarted() {
}

@Override
public void onLoading(long total, long current, boolean isDownloading) {
builder.setContentTitle("一款应用正在下载"+(int)((double)current/total*100)+"%").setProgress((int)total,(int)current,false);
   send();

}

@Override
public void onSuccess(File result) {
builder.setContentTitle("一款应用下载完成100%").setProgress(100, 100, false);
send();
openFile(result);
}

@Override
public void onError(Throwable ex, boolean isOnCallback) {
Toast.makeText(DownLoadService.this,"下载失败，请检查网络和SD卡",Toast.LENGTH_SHORT).show();
//CommonUtil.showToast(DownLoadService.this,"下载失败，请检查网络和SD卡");
}

@Override
public void onCancelled(CancelledException cex) {
}

@Override
public void onFinished() {
}
});
}


//打开APK程序代码

private void openFile(File file) {
// TODO Auto-generated method stub
Log.e("OpenFile", file.getName());
Intent intent = new Intent();
intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
intent.setAction(Intent.ACTION_VIEW);
intent.setDataAndType(Uri.fromFile(file),
"application/vnd.android.package-archive");
startActivity(intent);
}

private void send(){
build = builder.build();
notificationManager.notify(number, build);
}
}

如图：

三、强制升级。

1.当收到服务器的force=1时，需要强制升级，这个时候，需要展示的界面如下：

2.点击立刻更新，会出现一个progressBar进行更新，如图：

3.如果此时强制退出，要销魂app，用的方法，代码如下：

 private long curMillios = 0;
private boolean showExitToast(){
long time = System.currentTimeMillis();
if (time - curMillios < 2000){
return true;
}

curMillios = time;
return false;
}
@Override
public void onBackPressed() {
// TODO Auto-generated method stub
//super.onBackPressed();

if(force==0){
finish();
}else{

if(showExitToast()){
/**
 * 关闭整个程序
 */
ExitAppliation.getInstance().exit();
//
//finish();
System.exit(0);
}else{
CommonUtils.showToast(this,"再点击一次退出！");
}


}

}