My problem is that when I try to read a checkbox preference state from a different activity on bootup then send a status bar notification. Then when the device boots the I get a force close error message popup then when I go into the error log I don't understand what happens.
The code for the broadcast receiver is shown below:
@Override
public void onReceive(Context context, Intent intent) {
if(intent.getAction().equals(Intent.ACTION_BOOT_COMPLETED)){
//this creates a reference to my preferences activity
Prefs prefsC = new Prefs();
SharedPreferences prefs = context.getSharedPreferences("Prefs", 0);
int status = Integer.parseInt(prefs.getString("bootup", "-1"));
if(status > 0){
//notifyNS is a method that sends the status bar notification
prefsC.notifyNS("", R.drawable.n);
//the setCheckedNS method is just a custom method I made to set the state of a checkbox preference
prefsC.setCheckedNS("icon", false);
}else{
prefsC.setCheckedNS("enable", false);
prefsC.setCheckedNS("icon", false);
prefsC.setCheckedNS("bootup", false);
}
}
}
So could you help me solve the issue on why it force closes on bootup. So basically what I want to do is read a checkbox preference state on bootup then send a status bar notification.
This is my error log response:
04-16 11:23:15.546: ERROR/AndroidRuntime(977): FATAL EXCEPTION: main
04-16 11:23:15.546: ERROR/AndroidRuntime(977): java.lang.RuntimeException: Unable to instantiate receiver com.brandon.labs.nsettings.receivers.notifyBootup: java.lang.ClassNotFoundException: com.brandon.labs.nsettings.receivers.notifyBootup in loader dalvik.system.PathClassLoader[/data/app/com.brandon.labs.nsettings-1.apk]
04-16 11:23:15.546: ERROR/AndroidRuntime(977): at android.app.ActivityThread.handleReceiver(ActivityThread.java:2913)
04-16 11:23:15.546: ERROR/AndroidRuntime(977): at android.app.ActivityThread.access$3200(ActivityThread.java:135)
04-16 11:23:15.546: ERROR/AndroidRuntime(977): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2198)
04-16 11:23:15.546: ERROR/AndroidRuntime(977): at android.os.Handler.dispatchMessage(Handler.java:99)
04-16 11:23:15.546: ERROR/AndroidRuntime(977): at android.os.Looper.loop(Looper.java:144)
04-16 11:23:15.546: ERROR/AndroidRuntime(977): at android.app.ActivityThread.main(ActivityThread.java:4937)
04-16 11:23:15.546: ERROR/AndroidRuntime(977): at java.lang.reflect.Method.invokeNative(Native Method)
04-16 11:23:15.546: ERROR/AndroidRuntime(977): at java.lang.reflect.Method.invoke(Method.java:521)
04-16 11:23:15.546: ERROR/AndroidRuntime(977): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
04-16 11:23:15.546: ERROR/AndroidRuntime(977): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
04-16 11:23:15.546: ERROR/AndroidRuntime(977): at dalvik.system.NativeStart.main(Native Method)
04-16 11:23:15.546: ERROR/AndroidRuntime(977): Caused by: java.lang.ClassNotFoundException: com.brandon.labs.nsettings.receivers.notifyBootup in loader dalvik.system.PathClassLoader[/data/app/com.brandon.labs.nsettings-1.apk]
04-16 11:23:15.546: ERROR/AndroidRuntime(977): at dalvik.system.PathClassLoader.findClass(PathClassLoader.java:243)
04-16 11:23:15.546: ERROR/AndroidRuntime(977): at java.lang.ClassLoader.loadClass(ClassLoader.java:573)
04-16 11:23:15.546: ERROR/AndroidRuntime(977): at java.lang.ClassLoader.loadClass(ClassLoader.java:532)
04-16 11:23:15.546: ERROR/AndroidRuntime(977): at android.app.ActivityThread.handleReceiver(ActivityThread.java:2904)
04-16 11:23:15.546: ERROR/AndroidRuntime(977): ... 10 more
So I have no clue what to do from here.
Alright I have figured out what I have done wrong. What it is how I was connecting the context to the notificationManger construct method and Intent construct method.
Here is my new and revised code that works: `public class BootupReceiver extends BroadcastReceiver {
private static final boolean BOOTUP_TRUE = true;
private static final String BOOTUP_KEY = "bootup";
@Override
public void onReceive(Context context, Intent intent) {
if(getBootup(context)) {
Toast toast2 = Toast.makeText(context, "getBootup", Toast.LENGTH_SHORT);
toast2.show();
NotificationManager NotifyM = (NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE);
Notification Notify = new Notification(R.drawable.n,
"NSettings Enabled", System.currentTimeMillis());
Notify.flags |= Notification.FLAG_NO_CLEAR;
Notify.flags |= Notification.FLAG_ONGOING_EVENT;
RemoteViews contentView = new RemoteViews(context.getPackageName(), R.layout.notification);
Notify.contentView = contentView;
Intent notificationIntent = new Intent(context, Toggles.class);
PendingIntent contentIntent = PendingIntent.getActivity(context, 0, notificationIntent, 0);
Notify.contentIntent = contentIntent;
Toast toast = Toast.makeText(context, "Notify about to be sent", Toast.LENGTH_SHORT);
toast.show();
int HELO_ID = 00000;
NotifyM.notify(HELLO_ID, Notify);
Toast toast1 = Toast.makeText(context, "Notify sent", Toast.LENGTH_SHORT);
toast1.show();
}
Intent serviceIntent = new Intent();
serviceIntent.setAction("com.brandon.labs.nsettings.NotifyService");
context.startService(serviceIntent);
}
public static boolean getBootup(Context context){
return PreferenceManager.getDefaultSharedPreferences(context).getBoolean(BOOTUP_KEY, BOOTUP_TRUE);
}
} `
Since this question has gotten more than 100 views I thought it would be nice of me to post the code that works properly.
Note: I don't know why the closing curly bracket for the class isn't showing with the rest of the code it's a stackoverflow error
According to log ('java.lang.RuntimeException: Unable to instantiate receiver'), system is unable to create instance of your receiver class, because system is unable to find specified class (com.brandon.labs.nsettings.receivers.notifyBootup). I think it is probably problems with name (of receiver class) in your AndroidManifest.xml file, and it is not related to preferences.
In future, if you will get another exception, i recommend you to read carefully message of exception ;) and stack trace. Usually they contains the half of answer to your question. And for popular mistakes - you can try to type exception text into Google (excluding some specific info such as name of class), and you will find solution very fast.
Have you added the following to your AndroidManifest.xml along with registering the BroadcastReceiver??
<uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" />
来源：https://stackoverflow.com/questions/5683959/broadcast-receiver-check-a-checkbox-preference-state-on-bootup-then-send-a-noti