NullPointerException in android app on sharedpreferences declaration?
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So, making an app. I added loads of new code, and now it FC's on open :(

Here is the logcat:


    07-25 16:59:12.490: D/AndroidRuntime(26121): Shutting down VM
    07-25 16:59:12.495: W/dalvikvm(26121): threadid=1: thread exiting with uncaught exception (group=0x40a641f8)
    07-25 16:59:12.495: E/AndroidRuntime(26121): FATAL EXCEPTION: main
    07-25 16:59:12.495: E/AndroidRuntime(26121): java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{com.liamwli.smsbusy/com.liamwli.smsbusy.Sms_busyActivity}: java.lang.NullPointerException
    07-25 16:59:12.495: E/AndroidRuntime(26121): 	at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1993)
    07-25 16:59:12.495: E/AndroidRuntime(26121): 	at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2104)
    07-25 16:59:12.495: E/AndroidRuntime(26121): 	at android.app.ActivityThread.access$600(ActivityThread.java:132)
    07-25 16:59:12.495: E/AndroidRuntime(26121): 	at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1157)
    07-25 16:59:12.495: E/AndroidRuntime(26121): 	at android.os.Handler.dispatchMessage(Handler.java:99)
    07-25 16:59:12.495: E/AndroidRuntime(26121): 	at android.os.Looper.loop(Looper.java:137)
    07-25 16:59:12.495: E/AndroidRuntime(26121): 	at android.app.ActivityThread.main(ActivityThread.java:4575)
    07-25 16:59:12.495: E/AndroidRuntime(26121): 	at java.lang.reflect.Method.invokeNative(Native Method)
    07-25 16:59:12.495: E/AndroidRuntime(26121): 	at java.lang.reflect.Method.invoke(Method.java:511)
    07-25 16:59:12.495: E/AndroidRuntime(26121): 	at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:789)
    07-25 16:59:12.495: E/AndroidRuntime(26121): 	at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:556)
    07-25 16:59:12.495: E/AndroidRuntime(26121): 	at dalvik.system.NativeStart.main(Native Method)
    07-25 16:59:12.495: E/AndroidRuntime(26121): Caused by: java.lang.NullPointerException
    07-25 16:59:12.495: E/AndroidRuntime(26121): 	at android.preference.PreferenceManager.getDefaultSharedPreferencesName(PreferenceManager.java:371)
    07-25 16:59:12.495: E/AndroidRuntime(26121): 	at android.preference.PreferenceManager.getDefaultSharedPreferences(PreferenceManager.java:366)
    07-25 16:59:12.495: E/AndroidRuntime(26121): 	at com.liamwli.smsbusy.Sms_busyActivity.<init>(Sms_busyActivity.java:23)
    07-25 16:59:12.495: E/AndroidRuntime(26121): 	at java.lang.Class.newInstanceImpl(Native Method)
    07-25 16:59:12.495: E/AndroidRuntime(26121): 	at java.lang.Class.newInstance(Class.java:1319)
    07-25 16:59:12.495: E/AndroidRuntime(26121): 	at android.app.Instrumentation.newActivity(Instrumentation.java:1023)
    07-25 16:59:12.495: E/AndroidRuntime(26121): 	at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1984)
    07-25 16:59:12.495: E/AndroidRuntime(26121): 	... 11 more
    07-25 16:59:12.940: I/dalvikvm(26121): threadid=3: reacting to signal 3
    07-25 16:59:12.950: I/dalvikvm(26121): Wrote stack traces to '/data/anr/traces.txt'
    07-25 16:59:13.040: I/dalvikvm(26121): threadid=3: reacting to signal 3
    07-25 16:59:13.045: I/dalvikvm(26121): Wrote stack traces to '/data/anr/traces.txt'



Line 23 of Sms_busyActivity.java is:

    SharedPreferences getPrefs = PreferenceManager.getDefaultSharedPreferences(getBaseContext());

I don't understand what I am getting this error.

The rest of the activity is below (It is quite large):

    package com.liamwli.smsbusy;
    
    import android.app.Activity;
    import android.os.Bundle;
    import android.preference.PreferenceManager;
    import android.util.Log;
    import android.view.KeyEvent;
    import android.view.Menu;
    import android.view.View;
    import android.widget.Button;
    import android.widget.CompoundButton;
    import android.widget.EditText;
    import android.widget.Toast;
    import android.widget.ToggleButton;
    import android.content.IntentFilter;
    import android.content.SharedPreferences;
    
    public class Sms_busyActivity extends Activity {
    	IntentFilter intentFilter;
    	ToggleButton endis;
    	EditText message;
    	Button smessage;
    	SharedPreferences getPrefs = PreferenceManager.getDefaultSharedPreferences(getBaseContext());
    	SharedPreferences.Editor editor = getPrefs.edit();
    
    	public void onCreate(Bundle savedInstanceState) {
    		super.onCreate(savedInstanceState);
    		// Intent i = new Intent("com.liamwli.smsbusy.PREFS");
    		// startActivity(i);
    		setContentView(R.layout.main);
    
    		endis = (ToggleButton) findViewById(R.id.enableddis);
    
    		smessage = (Button) findViewById(R.id.savemess);
    
    		message = (EditText) findViewById(R.id.message);
    
    		// ---intent to filter for SMS messages received---
    		intentFilter = new IntentFilter();
    		intentFilter.addAction("SMS_RECEIVED_ACTION");
    
    		endis.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
    
    			@Override
    			public void onCheckedChanged(CompoundButton arg0, boolean arg1) {
    				// TODO Auto-generated method stub
    				Toast.makeText(Sms_busyActivity.this, "App state changed",
    						Toast.LENGTH_LONG).show();
    				if (endis.isChecked()){
    					editor.putBoolean("enabled", true);
    					editor.commit();
    				}else {
    					editor.putBoolean("enabled", false);
    					editor.commit();
    				}
    
    				editor.putString("message", message.getText().toString());
    				editor.commit();
    				
    			}
    		});
    
    		smessage.setOnClickListener(new View.OnClickListener() {
    			
    			@Override
    			public void onClick(View arg0) {
    				// TODO Auto-generated method stub
    				
    				editor.putString("message", message.getText().toString());
    				editor.commit();
    				
    			}
    		});
    		
    	}
    
    	@SuppressWarnings("deprecation")
    	@Override
    	public boolean onKeyDown(int keyCode, KeyEvent event) {
    		if (Integer.parseInt(android.os.Build.VERSION.SDK) < 5
    				&& keyCode == KeyEvent.KEYCODE_BACK
    				&& event.getRepeatCount() == 0) {
    			Log.d("CDA", "onKeyDown Called");
    			onBackPressed();
    		}
    
    		return super.onKeyDown(keyCode, event);
    	}
    
    	public void onBackPressed() {
    		Log.d("CDA", "onBackPressed Called");
    
    	}
    
    	@Override
    	public boolean onCreateOptionsMenu(Menu menu) {
    		// TODO Auto-generated method stub
    		return super.onCreateOptionsMenu(menu);
    	}
    
    }

Please can someone help me?