我正在尝试按照Android tuto网站实施示例通知管理器应用程序。
执行后如果我点击开始通知按钮，我就会低于例外。
04-13 18:40:30.965: E/AndroidRuntime(2374): FATAL EXCEPTION: main
04-13 18:40:30.965: E/AndroidRuntime(2374): java.lang.IllegalArgumentException: android.content.pm.PackageManager$NameNotFoundException: ComponentInfo{com.example.notificationmanager/com.example.notificationmanager.NotificationView}
04-13 18:40:30.965: E/AndroidRuntime(2374): at android.app.TaskStackBuilder.addParentStack(TaskStackBuilder.java:180)
04-13 18:40:30.965: E/AndroidRuntime(2374): at android.app.TaskStackBuilder.addParentStack(TaskStackBuilder.java:151)
04-13 18:40:30.965: E/AndroidRuntime(2374): at com.example.notificationmanager.MainActivity.displayNotification(MainActivity.java:64)
04-13 18:40:30.965: E/AndroidRuntime(2374): at com.example.notificationmanager.MainActivity$1.onClick(MainActivity.java:27)
04-13 18:40:30.965: E/AndroidRuntime(2374): at android.view.View.performClick(View.java:4204)
04-13 18:40:30.965: E/AndroidRuntime(2374): at android.view.View$PerformClick.run(View.java:17355)
04-13 18:40:30.965: E/AndroidRuntime(2374): at android.os.Handler.handleCallback(Handler.java:725)
04-13 18:40:30.965: E/AndroidRuntime(2374): at android.os.Handler.dispatchMessage(Handler.java:92)
04-13 18:40:30.965: E/AndroidRuntime(2374): at android.os.Looper.loop(Looper.java:137)
04-13 18:40:30.965: E/AndroidRuntime(2374): at android.app.ActivityThread.main(ActivityThread.java:5041)
04-13 18:40:30.965: E/AndroidRuntime(2374): at java.lang.reflect.Method.invokeNative(Native Method)
04-13 18:40:30.965: E/AndroidRuntime(2374): at java.lang.reflect.Method.invoke(Method.java:511)
04-13 18:40:30.965: E/AndroidRuntime(2374): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793)
04-13 18:40:30.965: E/AndroidRuntime(2374): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560)
04-13 18:40:30.965: E/AndroidRuntime(2374): at dalvik.system.NativeStart.main(Native Method)
04-13 18:40:30.965: E/AndroidRuntime(2374): Caused by: android.content.pm.PackageManager$NameNotFoundException: ComponentInfo{com.example.notificationmanager/com.example.notificationmanager.NotificationView}
04-13 18:40:30.965: E/AndroidRuntime(2374): at android.app.ApplicationPackageManager.getActivityInfo(ApplicationPackageManager.java:225)
04-13 18:40:30.965: E/AndroidRuntime(2374): at android.app.TaskStackBuilder.addParentStack(TaskStackBuilder.java:167)
04-13 18:40:30.965: E/AndroidRuntime(2374): ... 14 more
MainActivity.java
package com.example.notificationmanager;
import android.app.Activity;
import android.app.NotificationManager;
import android.app.PendingIntent;
import android.app.TaskStackBuilder;
import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.support.v4.app.NotificationCompat;
import android.util.Log;
import android.view.View;
import android.widget.Button;
public class MainActivity extends Activity {
private NotificationManager mNotificationManager;
private int notificationID = 100;
private int numMessages = 0;
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Button startBtn = (Button) findViewById(R.id.start);
startBtn.setOnClickListener(new View.OnClickListener() {
public void onClick(View view) {
displayNotification();
}
});
Button cancelBtn = (Button) findViewById(R.id.cancel);
cancelBtn.setOnClickListener(new View.OnClickListener() {
public void onClick(View view) {
cancelNotification();
}
});
Button updateBtn = (Button) findViewById(R.id.update);
updateBtn.setOnClickListener(new View.OnClickListener() {
public void onClick(View view) {
updateNotification();
}
});
}
protected void displayNotification() {
Log.i("Start", "notification");
/* Invoking the default notification service */
NotificationCompat.Builder mBuilder =
new NotificationCompat.Builder(this);
mBuilder.setContentTitle("New Message");
mBuilder.setContentText("You've received new message.");
mBuilder.setTicker("New Message Alert!");
mBuilder.setSmallIcon(R.drawable.ganesh);
/* Increase notification number every time a new notification arrives */
mBuilder.setNumber(++numMessages);
/* Creates an explicit intent for an Activity in your app */
Intent resultIntent = new Intent(this, NotificationView.class);
TaskStackBuilder stackBuilder = TaskStackBuilder.create(this);
stackBuilder.addParentStack(NotificationView.class);
/* Adds the Intent that starts the Activity to the top of the stack */
stackBuilder.addNextIntent(resultIntent);
PendingIntent resultPendingIntent =
stackBuilder.getPendingIntent(
0,
PendingIntent.FLAG_UPDATE_CURRENT
);
mBuilder.setContentIntent(resultPendingIntent);
mNotificationManager =
(NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
/* notificationID allows you to update the notification later on. */
mNotificationManager.notify(notificationID, mBuilder.build());
}
protected void cancelNotification() {
Log.i("Cancel", "notification");
mNotificationManager.cancel(notificationID);
}
protected void updateNotification() {
Log.i("Update", "notification");
/* Invoking the default notification service */
NotificationCompat.Builder mBuilder =
new NotificationCompat.Builder(this);
mBuilder.setContentTitle("Updated Message");
mBuilder.setContentText("You've got updated message.");
mBuilder.setTicker("Updated Message Alert!");
mBuilder.setSmallIcon(R.drawable.ganesh);
/* Increase notification number every time a new notification arrives */
mBuilder.setNumber(++numMessages);
/* Creates an explicit intent for an Activity in your app */
Intent resultIntent = new Intent(this, NotificationView.class);
TaskStackBuilder stackBuilder = TaskStackBuilder.create(this);
stackBuilder.addParentStack(NotificationView.class);
/* Adds the Intent that starts the Activity to the top of the stack */
stackBuilder.addNextIntent(resultIntent);
PendingIntent resultPendingIntent =
stackBuilder.getPendingIntent(
0,
PendingIntent.FLAG_UPDATE_CURRENT
);
mBuilder.setContentIntent(resultPendingIntent);
mNotificationManager =
(NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
/* Update the existing notification using same notification ID */
mNotificationManager.notify(notificationID, mBuilder.build());
}
}