这是我的问题：我想在我的应用程序中添加一些背景通知。
所以我想按顺序使用alarmanager和广播接收器来重复任务。
但是如何在一个活动中开始广播以便稍后在不同的活动中销毁它而不创建超过1个广播？
答案 0 :(得分：1)
每项活动都应在每项活动中注册广播接收者。 onResume方法。别忘了在onPause取消注册。
答案 1 :(得分：0)
以下是我的通知代码，
public class NotificationService extends Service {
// constant
public static final long NOTIFY_INTERVAL = 30 * 1000; // 30 seconds
long current_times;
String c_time;
// run on another Thread to avoid crash
private Handler mHandler = new Handler();
// timer handling
static HttpClient client = new DefaultHttpClient();
private Timer mTimer = null;
@Override
public IBinder onBind(Intent intent) {
return null;
}
@TargetApi(Build.VERSION_CODES.GINGERBREAD) @SuppressLint("NewApi") @Override
public void onCreate() {
// cancel if already existed
StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder().permitAll().build();
StrictMode.setThreadPolicy(policy);
SharedPreferences.Editor editor = getSharedPreferences("notification_oldtime", MODE_PRIVATE).edit();
editor.putInt("old_trail_time", 0);
editor.putInt("old_sample_time", 0);
editor.putInt("old_neworder_time", 0);
editor.commit();
if(mTimer != null) {
mTimer.cancel();
} else {
// recreate new
mTimer = new Timer();
}
// schedule task
mTimer.scheduleAtFixedRate(new TimeDisplayTimerTask(), 0, NOTIFY_INTERVAL);
}
public long current_time_get(){
return current_times;
}
class TimeDisplayTimerTask extends TimerTask {
@TargetApi(Build.VERSION_CODES.JELLY_BEAN) @Override
public void run() {
// run on another thread
mHandler.post(new Runnable() {
@Override
public void run() {
// display toast
DBAdapter.init(getApplicationContext());
SharedPreferences prefs = getSharedPreferences("notification_oldtime", MODE_PRIVATE);
SharedPreferences.Editor editor = getSharedPreferences("notification_oldtime", MODE_PRIVATE).edit();
int sample_order_new_count=0,trail_order_new_count=0,new_order_new_count=0,old_sample_order_count=0,old_trail_order_count=0,old_new_order_count=0;
String search_read_URL=DBAdapter.getUrlName()+"/web/dataset/search_read";
JSONArray sample_jsonarray,trail_jsonarray,new_jsonarray;
JSONObject jsonObj_sample,jsonObj_trail,jsonObj_newOrder;
StringEntity sample_entity,new_order_entity,trail_entity;
String responseBody_sample,responseBody_Trail,responseBody_NewOrder;
ResponseHandler<String> responseHandler = new BasicResponseHandler();
try{
DBAdapter.init(getApplicationContext());
// notification for sample order
HttpPost sample_get = new HttpPost(search_read_URL);
HttpPost new_order_get = new HttpPost(search_read_URL);
HttpPost trail_get = new HttpPost(search_read_URL);
Log.d("service","start");
sample_entity = new StringEntity(" {\"jsonrpc\":\"2.0\",\"method\":\"call\",\"params\":{\"model\":\"sale.sample.order\",\"fields\":[\"partner_id\",\"distributor_id\",\"marketing_person_id\",\"__last_update\"],\"domain\":[],\"context\":{\"lang\":\"en_US\",\"tz\":false,\"uid\":"+Integer.valueOf(DBAdapter.getMarketPersonUid())+",\"params\":{\"page\":0,\"limit\":500,\"view_type\":\"list\",\"model\":\"sale.sample.order\",\"menu_id\":378,\"action\":446,\"_push_me\":false},\"bin_size\":true},\"offset\":0,\"limit\":500,\"sort\":\"\"},\"id\":780343122}");
new_order_entity=new StringEntity("{\"jsonrpc\":\"2.0\",\"method\":\"call\",\"params\":{\"model\":\"new.order.log\",\"fields\":[\"name\",\"partner_id\",\"distributor_id\",\"marketing_person_id\",\"__last_update\"],\"domain\":[],\"context\":{\"lang\":\"en_US\",\"tz\":false,\"uid\":"+Integer.valueOf(DBAdapter.getMarketPersonUid())+",\"params\":{\"page\":0,\"limit\":500,\"view_type\":\"list\",\"model\":\"new.order.log\",\"menu_id\":355,\"action\":418,\"_push_me\":false},\"bin_size\":true},\"offset\":0,\"limit\":500,\"sort\":\"\"},\"id\":674827326}");
trail_entity=new StringEntity("{\"jsonrpc\":\"2.0\",\"method\":\"call\",\"params\":{\"model\":\"leather.trial.order\",\"fields\":[\"partner_id\",\"distributor_id\",\"marketing_person_id\",\"__last_update\"],\"domain\":[],\"context\":{\"lang\":\"en_US\",\"tz\":false,\"uid\":"+Integer.valueOf(DBAdapter.getMarketPersonUid())+",\"params\":{\"page\":0,\"limit\":500,\"view_type\":\"list\",\"model\":\"leather.trial.order\",\"menu_id\":375,\"action\":442,\"_push_me\":false},\"bin_size\":true},\"offset\":0,\"limit\":500,\"sort\":\"\"},\"id\":455581058}");
sample_get.setHeader("Content-Type", "application/json");
sample_get.setHeader("Cookie:","session_id="+DBAdapter.getSessionId());
sample_get.setEntity(sample_entity);
new_order_get.setHeader("Content-Type", "application/json");
new_order_get.setHeader("Cookie:","session_id="+DBAdapter.getSessionId());
new_order_get.setEntity(new_order_entity);
trail_get.setHeader("Content-Type", "application/json");
trail_get.setHeader("Cookie:","session_id="+DBAdapter.getSessionId());
trail_get.setEntity(trail_entity);
responseBody_sample = client.execute(sample_get, responseHandler);
jsonObj_sample = new JSONObject(responseBody_sample);
JSONObject json=jsonObj_sample.getJSONObject("result");
sample_jsonarray = json.getJSONArray("records");
responseBody_Trail=client.execute(trail_get, responseHandler);
jsonObj_trail=new JSONObject(responseBody_Trail);
JSONObject json1=jsonObj_trail.getJSONObject("result");
trail_jsonarray = json1.getJSONArray("records");
responseBody_NewOrder=client.execute(new_order_get,responseHandler);
jsonObj_newOrder=new JSONObject(responseBody_NewOrder);
JSONObject json2=jsonObj_newOrder.getJSONObject("result");
new_jsonarray=json2.getJSONArray("records");
long server_Time = 0;
SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss", Locale.US);
String new_order_name="",trail_order_name="",sample_order_name="";
for (int m = 0; m <trail_jsonarray.length(); m++) {
JSONObject c = trail_jsonarray.getJSONObject(m);
JSONArray cus_json_array=c.getJSONArray( "partner_id");
JSONArray market_person_json_array=c.getJSONArray( "marketing_person_id");
Date date = format.parse(String.valueOf(c.getString("__last_update")));
server_Time = date.getTime();
DBAdapter.init(getApplicationContext());
long current_time=Long.parseLong(DBAdapter.getCurrentTime());
Log.d("trail ct"+current_time,"st"+server_Time);
if(server_Time>current_time){
trail_order_new_count++;
Log.d("trail_order cus name",cus_json_array.getString(1));
trail_order_name=trail_order_name+" "+"Customer="+cus_json_array.getString(1)+"\n"+"Marketing Person="+market_person_json_array.getString(1);
}
else{
m=trail_jsonarray.length();
}
}
for (int m = 0; m <sample_jsonarray.length(); m++) {
JSONObject c = sample_jsonarray.getJSONObject(m);
JSONArray cus_json_array=c.getJSONArray( "partner_id");
JSONArray market_person_json_array=c.getJSONArray( "marketing_person_id");
Date date = format.parse(String.valueOf(c.getString("__last_update")));
server_Time = date.getTime();
DBAdapter.init(getApplicationContext());
long current_time=Long.parseLong(DBAdapter.getCurrentTime());
Log.d("sample ct"+current_time,"st"+server_Time);
if(server_Time>current_time){
sample_order_new_count++;
Log.d("sample_order cus name",cus_json_array.getString(1));
sample_order_name=sample_order_name+" "+"Customer="+cus_json_array.getString(1)+"\nMarketing Person="+market_person_json_array.getString(1);
}
else{
m=trail_jsonarray.length();
}
}
for (int m = 0; m <new_jsonarray.length(); m++) {
JSONObject c = new_jsonarray.getJSONObject(m);
JSONArray cus_json_array=c.getJSONArray( "partner_id");
JSONArray market_person_json_array=c.getJSONArray( "marketing_person_id");
Date date = format.parse(String.valueOf(c.getString("__last_update")));
server_Time = date.getTime();
DBAdapter.init(getApplicationContext());
long current_time=Long.parseLong(DBAdapter.getCurrentTime());
Log.d("newOrder ct"+current_time,"st"+server_Time);
if(server_Time>current_time){
new_order_new_count++;
Log.d("new_order cus name",cus_json_array.getString(1));
new_order_name=new_order_name+" "+"Customer="+cus_json_array.getString(1)+"\nMarketing Person="+market_person_json_array.getString(1);
}
else{
m=trail_jsonarray.length();
}
}
int newOrder_ID=100,sampleOrder_ID=200,trailOrder_ID=300;
final NotificationManager mgr=
(NotificationManager)getApplicationContext().getSystemService(Context.NOTIFICATION_SERVICE);
PendingIntent i2=PendingIntent.getActivity(getApplicationContext(), 1,
new Intent(getApplicationContext(),MainActivity.class),
0);
Uri alarmSound = RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION);
if (new_order_new_count>prefs.getInt("old_neworder_time", 0)) {
NotificationCompat.Builder mBuilder = new NotificationCompat.Builder(getApplicationContext());
mBuilder .setStyle(new NotificationCompat.BigTextStyle().bigText(new_order_name));
mBuilder.setContentText(new_order_name);
mBuilder.setContentTitle(new_order_new_count+" New Orders");
mBuilder.setSmallIcon(R.drawable.bkg_new_logo);
//mBuilder.setNumber(++numMsg);
mBuilder.setContentIntent(i2);
Log.d(String.valueOf(old_new_order_count),String.valueOf(new_order_new_count));
if(old_new_order_count!=new_order_new_count){
mBuilder.setSound(alarmSound);
}
mgr.notify(newOrder_ID, mBuilder.build());
old_new_order_count=new_order_new_count;
editor.putInt("old_neworder_time", new_order_new_count);
editor.commit();
}
if (sample_order_new_count>prefs.getInt("old_sample_time", 0)) {
NotificationCompat.Builder mBuilder = new NotificationCompat.Builder(getApplicationContext());
mBuilder .setStyle(new NotificationCompat.BigTextStyle().bigText(sample_order_name));
mBuilder.setContentText(sample_order_name);
mBuilder.setContentTitle(sample_order_new_count+" Sample Orders");
mBuilder.setSmallIcon(R.drawable.bkg_new_logo);
//mBuilder.setNumber(++numMsg);
mBuilder.setContentIntent(i2);
if(old_sample_order_count!=sample_order_new_count){
mBuilder.setSound(alarmSound);
}
mgr.notify(sampleOrder_ID, mBuilder.build());
old_sample_order_count=sample_order_new_count;
editor.putInt("old_sample_time", sample_order_new_count);
editor.commit();
}
if (trail_order_new_count>prefs.getInt("old_trail_time", 0)) {
NotificationCompat.Builder mBuilder = new NotificationCompat.Builder(getApplicationContext());
mBuilder .setStyle(new NotificationCompat.BigTextStyle().bigText(trail_order_name));
mBuilder.setContentText(trail_order_name);
mBuilder.setContentTitle(trail_order_new_count+" Trail Orders");
mBuilder.setSmallIcon(R.drawable.bkg_new_logo);
//mBuilder.setNumber(++numMsg);
mBuilder.setContentIntent(i2);
if(old_trail_order_count!=trail_order_new_count){
mBuilder.setSound(alarmSound);
}
mgr.notify(trailOrder_ID, mBuilder.build());
old_trail_order_count=trail_order_new_count;
editor.putInt("old_trail_time", trail_order_new_count);
editor.commit();
}
}
catch(Exception e){
e.printStackTrace();
}
}
});
}
}
}
您可以使用NOTIFY_INTERVAL设置定期时间。 在我的代码中，我使用30秒。
我的服务每30秒在后台运行一次。
我希望这段代码可以帮助你......