我在android应用程序中有MainActivity.java
因为我有setRepeatingAlarm()，它在每个120sec之后执行，并执行select.php，检查表中是否有可用的名称。
public void setRepeatingAlarm() {
Intent intent = new Intent(MainActivity.this, TimeAlarm.class);
PendingIntent pendingIntent = PendingIntent.getBroadcast(this, 0,
intent, PendingIntent.FLAG_UPDATE_CURRENT);
am.setRepeating(AlarmManager.RTC_WAKEUP, System.currentTimeMillis()+120000,
(120000), pendingIntent);
}
广播接收器：
public class TimeAlarm extends BroadcastReceiver {
public void onReceive(Context context, Intent intent) {
//get select query data
try {
HttpClient httpclient = new DefaultHttpClient();
HttpPost httppost = new HttpPost("http://www.myweb.com/select.php");
HttpResponse response = httpclient.execute(httppost);
HttpEntity entity = response.getEntity();
is = entity.getContent();
if(is != null) {
Intent notificationIntent = new Intent(context, MainActivity.class);
PendingIntent contentIntent = PendingIntent.getActivity(context, 0, notificationIntent, 0);
NotificationManager notificationManager = (NotificationManager) context
.getSystemService(Context.NOTIFICATION_SERVICE);
Notification noti = new NotificationCompat.Builder(context)
.setSmallIcon(R.drawable.ic_launcher)
.setTicker("mytestapp")
.setContentTitle("mytestapp")
.setContentText("Please check new update!")
.setContentIntent(contentIntent)
//At most three action buttons can be added
.setAutoCancel(true).build();
int notifyID =0;
notificationManager.notify(notifyID, noti);
}
is.close();
} catch(Exception e) {
}
}
}
但我无法执行CCD_ 3进入catch块。没有得到任何错误详细信息：（
select.php提供类似{"name":"mynametest"}或null 的输出
建议我这里出了什么问题
根据我对您问题的评论，您可以将网络代码移动到IntentService中，只需从BroadcastReceiver开始即可。IntentService中的所有工作都由运行onHandleIntent(...)方法的工作线程处理，因此在其中执行网络任务是安全的。
IntentService:
public class MyIntentService extends IntentService {
// You must have a parameter-less ctor for an IntentService
public MyIntentService() {
super("MyIntentService");
}
public MyIntentService(String name) {
super(name);
}
@Override
protected void onHandleIntent(Intent intent) {
// This method is run on a separate worker thread so it's
// safe to put all of your network code here
}
}
将您当前在BroadcastReceiver onReceive(...)方法中的所有内容复制到IntentService的onHandleIntent(...)方法中，并将其替换为代码以启动服务，如下所示。。。
public class TimeAlarm extends BroadcastReceiver {
public void onReceive(Context context, Intent intent) {
Intent i = new Intent(context, MyIntentService.class);
context.startService(i);
}
}