[英]Android Java Shared Preferences push notification once
我在myMainActivity
有這個:
public void sendNotificationIfTimeEnd01() {
Intent intent01 = new Intent(Intent.ACTION_VIEW,
Uri.parse("https://www.google.de/?gws_rd=ssl"));
PendingIntent pendingIntent01 = PendingIntent.getActivity(this, 1, intent01, 0);
NotificationCompat.Builder builder = new NotificationCompat.Builder(this);
builder.setSmallIcon(R.drawable.ic_stat_notification);
builder.setContentIntent(pendingIntent01);
builder.setAutoCancel(true);
builder.setLargeIcon(BitmapFactory.decodeResource(getResources(), R.drawable.ic_launcher));
builder.setContentTitle(gamesJuliToStringArray[0]);
builder.setContentText("Ready");
builder.setSubText("click for google");
NotificationManager notificationManager = (NotificationManager) getSystemService(
NOTIFICATION_SERVICE);
notificationManager.notify(NOTIFICATION_ID_01, builder.build());
try {
Uri notification = RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION);
Ringtone r = RingtoneManager.getRingtone(getApplicationContext(), notification);
r.play();
} catch (Exception e) {
e.printStackTrace();
}
}
我在片段中這樣稱呼它:
if (diffDays <= 0) {
String diffDaysAvailable = "ready";
((TextView) android.findViewById(R.id.readyLeft)).setText(diffDaysAvailable);
((TextView)
activity.sendNotificationIfTimeEnd01();
Log.d("MyApp", "notification 1");
}
如果diffDays <= 0
我基本上會收到一個示例通知。 到目前為止有效。
問題是,當我重新啟動應用程序時,通知總是彈出。
我在Google上搜索,並讀到應該使用共享的首選項來解決此問題。 (沒有經驗)。 到目前為止,我有:
final SharedPreferences sharedPreferences = getActivity().getSharedPreferences(getString(R.string.preference_file_key), Context.MODE_PRIVATE);
final SharedPreferences.Editor editor = sharedPreferences.edit();
// push notification once time is up
final String notification01 = sharedPreferences.getString("notification01", "not01");
但是不知道如何繼續解決這個問題。
做這樣的事情:
if (diffDays <= 0) {
final SharedPreferences sharedPreferences = getActivity().getSharedPreferences(getString(R.string.preference_file_key), Context.MODE_PRIVATE);
final boolean notification01 = sharedPreferences.getBoolean("notification01", false);
if (!notification01) {
String diffDaysAvailable = "ready";
((TextView) android.findViewById(R.id.readyLeft)).setText(diffDaysAvailable);
activity.sendNotificationIfTimeEnd01();
Log.d("MyApp", "notification 1");
SharedPreferences.Editor editor = sharedPreferences.edit();
editor.putBoolean("notification01", true);
editor.apply();
}
}
在發送任何通知之前,這將檢查布爾值是否為false。 如果為假,則發送通知,並將布爾值設置為true,否則為空。
該行使用您提供的名稱初始化您的SharedPreference
,該名稱將對您的應用保持Private
SharedPreferences sharedPreferences = getActivity().getSharedPreferences("YOUR_PREFERENCE_NAME", Context.MODE_PRIVATE);
如果要優先存儲與鍵(字符串文字)關聯的boolean
數據,請調用此方法。
public void setValue() {
SharedPreferences.Editor editor = sharedPreferences.edit();
editor.putBoolean("your_key", true);
editor.commit();
}
使用這種方法,您可以檢查您是否已經使用鍵在首選項中輸入了true
值。
public boolean isValueExists() {
boolean value = sharedPreferences.getBoolean("your_key", false);
return value;
}
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