Java 无法实现通知服务
我参考了以下链接来研究Android中通知服务的演示示例:和 这两个项目都有效,但部分有效,即我已按原样下载并执行了这两个项目。两者都有启动通知的按钮。单击按钮时,通知将显示在顶部状态栏中 问题来了,单击该通知时,既不会显示任何消息,也不会激发导航到新活动的意图 我对这个概念还不熟悉,所以非常感谢您的帮助 代码 CreateNotification.classJava 无法实现通知服务,java,android,notifications,Java,Android,Notifications,我参考了以下链接来研究Android中通知服务的演示示例:和 这两个项目都有效,但部分有效,即我已按原样下载并执行了这两个项目。两者都有启动通知的按钮。单击按钮时,通知将显示在顶部状态栏中 问题来了,单击该通知时,既不会显示任何消息,也不会激发导航到新活动的意图 我对这个概念还不熟悉,所以非常感谢您的帮助 代码 CreateNotification.class public class CreateNotification extends Activity { @Override
public class CreateNotification extends Activity {
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
}
public void notify(View view) {
NotificationManager nm= (NotificationManager) getSystemService(NOTIFICATION_SERVICE);
final int UNIQUE_ID = 123458;
Intent navigationIntent = new Intent();
navigationIntent.setClass(CreateNotification.this,
NotificationReceiver.class);
PendingIntent pi = PendingIntent.getActivity(this, 0, navigationIntent,
0);
String body = "New Notification added!!!";
String title = "Title";
Notification n = new Notification(R.drawable.ic_launcher, body,
System.currentTimeMillis());
n.number = 2;
n.setLatestEventInfo(this, title, body, pi);
n.defaults = Notification.DEFAULT_ALL;
nm.notify(UNIQUE_ID, n);
}
}
public class NotificationReceiver extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.result);
Log.i("Receiver", "NotificationReceiver");
}
}
NotificationReceiver.class
public class CreateNotification extends Activity {
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
}
public void notify(View view) {
NotificationManager nm= (NotificationManager) getSystemService(NOTIFICATION_SERVICE);
final int UNIQUE_ID = 123458;
Intent navigationIntent = new Intent();
navigationIntent.setClass(CreateNotification.this,
NotificationReceiver.class);
PendingIntent pi = PendingIntent.getActivity(this, 0, navigationIntent,
0);
String body = "New Notification added!!!";
String title = "Title";
Notification n = new Notification(R.drawable.ic_launcher, body,
System.currentTimeMillis());
n.number = 2;
n.setLatestEventInfo(this, title, body, pi);
n.defaults = Notification.DEFAULT_ALL;
nm.notify(UNIQUE_ID, n);
}
}
public class NotificationReceiver extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.result);
Log.i("Receiver", "NotificationReceiver");
}
}
main.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical" >
<Button
android:id="@+id/button1"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:onClick="notify"
android:text="Create Notification" >
</Button>
</LinearLayout>
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent" >
<TextView
android:id="@+id/textView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="This is the result activity opened from the notification" >
</TextView>
</LinearLayout>
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.notificationmanager"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk android:minSdkVersion="10" />
<uses-permission android:name="android.permission.VIBRATE" />
<application
android:icon="@drawable/ic_launcher"
android:label="@string/app_name" >
<activity
android:name=".CreateNotification"
android:label="@string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity
android:name=".NotificationReceiver" />
</application>
</manifest>
result.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical" >
<Button
android:id="@+id/button1"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:onClick="notify"
android:text="Create Notification" >
</Button>
</LinearLayout>
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent" >
<TextView
android:id="@+id/textView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="This is the result activity opened from the notification" >
</TextView>
</LinearLayout>
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.notificationmanager"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk android:minSdkVersion="10" />
<uses-permission android:name="android.permission.VIBRATE" />
<application
android:icon="@drawable/ic_launcher"
android:label="@string/app_name" >
<activity
android:name=".CreateNotification"
android:label="@string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity
android:name=".NotificationReceiver" />
</application>
</manifest>
AndroidManifest.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical" >
<Button
android:id="@+id/button1"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:onClick="notify"
android:text="Create Notification" >
</Button>
</LinearLayout>
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent" >
<TextView
android:id="@+id/textView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="This is the result activity opened from the notification" >
</TextView>
</LinearLayout>
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.notificationmanager"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk android:minSdkVersion="10" />
<uses-permission android:name="android.permission.VIBRATE" />
<application
android:icon="@drawable/ic_launcher"
android:label="@string/app_name" >
<activity
android:name=".CreateNotification"
android:label="@string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity
android:name=".NotificationReceiver" />
</application>
</manifest>
请尝试修改行:
PendingIntent pi = PendingIntent.getActivity(this, 0, navigationIntent, 0);
到
文件:
请注意,活动将在现有活动的上下文之外启动,因此必须在Intent中使用Intent.FLAG\u activity\u NEW\u TASK launch标志
附在我的代码下面。对我来说,它工作正常
private void showNotification() {
Log.i(TAG, "showNotification called...");
final Intent notificationIntent = new Intent(this, UpdateApplicationActivity.class);
notificationIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
final PendingIntent contentIntent = PendingIntent.getActivity(this, 0, notificationIntent, 0);
final Notification notification = new Notification(R.drawable.htc_notification, getString(R.string.UpdateCheck_update_available), System.currentTimeMillis());
notification.defaults |= Notification.DEFAULT_ALL;
notification.flags |= Notification.FLAG_ONLY_ALERT_ONCE | Notification.FLAG_SHOW_LIGHTS | Notification.FLAG_AUTO_CANCEL;
notification.setLatestEventInfo(this, getString(R.string.UpdateCheck_notification_title), getString(R.string.UpdateCheck_notification_message), contentIntent);
// Notifying the user about the new update.
if (notificationManager != null) {
notificationManager.notify(APP_UPDATE_NOTIFICATION, notification);
}
}
请同时附上您的AndroidManifest.xml文件。Hmmm。。。一切看起来都很好。请下载API演示。。。您可以在其中找到一些通知示例。链接:演示仅讨论如何显示通知标题,单击该标题后会发生什么没有解释:(