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POAndroid SDK SharedPreferences troubles
 

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  1. POAndroid SDK SharedPreferences troubles
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    <p>I'm working on an app and would like to save the state of obe of my checkbox options, but when I try using the SharedPreferences class (first time using it) I get a nullpointer exception. I have been troubleshooting for a couple hours and cant find a solution. Could anyone look at this and tell me what's wrong? The full code is alot longer but this is the park giving me the null pointer exception. I know for a fact it has to do with SharedPreferences.</p> <pre><code>package us.mattmccoy.meanfind; //import java.util.Arrays; import android.annotation.SuppressLint; import android.app.Activity; import android.app.AlertDialog; import android.content.ClipData; import android.content.Context; import android.content.DialogInterface; import android.content.Intent; import android.content.SharedPreferences; import android.content.SharedPreferences.Editor; import android.os.Bundle; import android.view.Menu; import android.view.View; import android.view.View.OnClickListener; import android.widget.CheckBox; import android.widget.EditText; import android.widget.Toast; public class MainActivity extends Activity { //saved data stuff needed SharedPreferences preferences = this.getSharedPreferences("us.mattmccoy.meanfind", Context.MODE_PRIVATE); Editor edit = preferences.edit(); //private data using saved data String autoclearKEY = "us.mattmccoy.meanfind.AUTOCLEAR"; boolean autoclear = preferences.getBoolean(autoclearKEY, false); //normal private data final Context con1 = this; int dividend;String dataFixed;boolean tb; private CheckBox myCBox, acBox; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); addListenerBoxes(); if(autoclear == true){ acBox.setChecked(true); }else{ acBox.setChecked(false); } } //check box listeners public void addListenerBoxes(){ //instantiate boxes acBox = (CheckBox) findViewById(R.id.chex2); acBox.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { //is acBox checked? if (((CheckBox) v).isChecked()) { edit.putBoolean(autoclearKEY, true).commit(); }else{ edit.putBoolean(autoclearKEY, false).commit(); } } }); myCBox = (CheckBox) findViewById(R.id.chex); } </code></pre> <p>error message:</p> <p><a href="http://pastebin.com/5P2Mfwik" rel="nofollow noreferrer">http://pastebin.com/5P2Mfwik</a></p>
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