android - 为什么 Android 会忽略通知的创建？

Question

我有代码，但它不起作用，所以我请任何人帮助我。关于这个具体问题的信息非常少。

主 Activity

---

public class MainActivity extends Activity {
public final int PENDING_INTENT_ID = 8;
@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);

    Button clickity = (Button)findViewById(R.id.alarm_button);
    clickity.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            Calendar now = Calendar.getInstance();
            now.add(Calendar.SECOND, 20);

            //Create a new PendingIntent used by the Alarm when it activates
            Intent intent = new Intent(v.getContext(), AlarmReciever.class);
            intent.setAction("SOME_AWESOME_TRIGGER_WORD");
            intent.putExtra("info", "This String shows that the info is actually sent correctly");
            PendingIntent pendingIntent = PendingIntent.getBroadcast(v.getContext(), PENDING_INTENT_ID, intent, PendingIntent.FLAG_UPDATE_CURRENT|Intent.FILL_IN_DATA);

            //Then Create the alarm manager to send this pending intent and set the date to go off
            AlarmManager am = (AlarmManager)getSystemService(Activity.ALARM_SERVICE);
            am.set(AlarmManager.RTC_WAKEUP, now.getTimeInMillis(), pendingIntent);

        }
    });

}

---

AlarmReciever(知道我拼错了，但既然是这样，我就接受它)

---

public class AlarmReciever extends BroadcastReceiver{

@Override
public void onReceive(Context c, Intent arg1) {

    //get a reference to NotificationManager
    String ns = Context.NOTIFICATION_SERVICE;
    NotificationManager mNotificationManager = (NotificationManager) c.getSystemService(ns);

    //Instantiate the notification

    CharSequence tickerText = "Hello";
    long when = System.currentTimeMillis();
    Notification.Builder builder = new Notification.Builder(c)
                                .setTicker(tickerText)
                                .setWhen(when)
                                .setContentTitle(arg1.getStringExtra("info"))
                                .setContentText("Success!!")
                                .setAutoCancel(true);
    Notification notification = builder.getNotification();
    mNotificationManager.notify(0, notification);//note the first argument, the ID should be unique



}
}

---

list

---

<uses-sdk
    android:minSdkVersion="14"
    android:targetSdkVersion="15" />

<application
    android:icon="@drawable/ic_launcher"
    android:label="@string/app_name"
    android:theme="@style/AppTheme" >
    <activity
        android:name=".MainActivity"
        android:label="@string/title_activity_main" >
        <intent-filter>
            <action android:name="android.intent.action.MAIN" />

            <category android:name="android.intent.category.LAUNCHER" />
        </intent-filter>
    </activity>

    <receiver 
        android:name="com.testproject.AlarmReciever"
        android:enabled="true"
        android:exported="false" >
        <intent-filter>
    </receiver>

</application>

---

这应该就是一切。我正在尝试按原样运行它，但它没有显示任何内容。我在模拟器上运行它才是真正重要的。

编辑:当我说它不起作用时，我的意思是没有弹出任何内容。它运行良好，但从未弹出通知。

问题:

所以问题缩小到 Android 只是忽略了我的通知。问题是它没有告诉我为什么 -_- 所以我无法修复它。是否有任何有关此事的专家看到我的代码有问题以调用通知？它在模拟器上重要吗？

Answer 1

我遇到了同样的问题。如果在创建“new Notification()”时没有指定图标，则不会出现通知。