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POandroid setonclicklistener intent null pointer exception
 

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  1. POandroid setonclicklistener intent null pointer exception
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    <p>I'm trying to create a quiz game, but when I click on the response button, I get a <code>NullPointerException</code>.</p> <p>It seems all variables are initialized, can anyone help me?</p> <p>This is the class:</p> <pre><code>public class QActivity extends Activity { protected int qst = 0; protected int err = 0; protected String mode = ""; protected Intent intent; protected ArrayList&lt;Integer&gt; tb; protected Integer x = 0; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_q); Button r1 = (Button) findViewById(R.id.rep1); Button r2 = (Button) findViewById(R.id.rep2); Button r3 = (Button) findViewById(R.id.rep3); TextView txt = (TextView) findViewById(R.id.questiontxt); Question q = new Question(); DatabaseHelper myDbHelper = new DatabaseHelper(this); tb = getIntent().getExtras().getIntegerArrayList("tb"); mode = getIntent().getExtras().getString("Mode"); qst = getIntent().getExtras().getInt("qst"); err = getIntent().getExtras().getInt("err"); if (mode.equals("25")) { x = 0; do { x = (int) (Math.random() * 57); } while (Verif(x, tb) == true); tb.add(x); qst += 1; try { q = myDbHelper.getQuestion(x); } catch (SQLException sqle) { throw sqle; } txt.setText(q.getQuestion()); r1.setText(q.getAnswer1()); r2.setText(q.getAnswer2()); r3.setText(q.getAnswer3()); TextView t1 = (TextView) findViewById(R.id.questid); TextView t3 = (TextView) findViewById(R.id.questnumber); intent = new Intent(this, QActivity.class); intent.putExtra("Mode", mode); intent.putExtra("qst", qst); intent.putExtra("err", err); intent.putExtra("tab", tb); } r1.setOnClickListener(new OnClickListener() { public void onClick(View v) { // TODO Auto-generated method stub startActivity(intent); } }); } public boolean Verif(int n, ArrayList&lt;Integer&gt; tbl) { for (Integer s : tbl) { if (s == n) return true; } return false; } @Override public boolean onCreateOptionsMenu(Menu menu) { // Inflate the menu; this adds items to the action bar if it is present. getMenuInflater().inflate(R.menu.activity_q, menu); return true; } } </code></pre> <p>And this is LogCat output:</p> <pre><code>12-12 00:27:47.233: W/dalvikvm(7142): threadid=1: thread exiting with uncaught exception (group=0x40c471f8) 12-12 00:27:47.233: E/AndroidRuntime(7142): FATAL EXCEPTION: main 12-12 00:27:47.233: E/AndroidRuntime(7142): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.dreamappz.alamalmaarefa/com.dreamappz.alamalmaarefa.QActivity}: java.lang.NullPointerException 12-12 00:27:47.233: E/AndroidRuntime(7142): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1967) 12-12 00:27:47.233: E/AndroidRuntime(7142): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1992) 12-12 00:27:47.233: E/AndroidRuntime(7142): at android.app.ActivityThread.access$600(ActivityThread.java:127) 12-12 00:27:47.233: E/AndroidRuntime(7142): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1158) 12-12 00:27:47.233: E/AndroidRuntime(7142): at android.os.Handler.dispatchMessage(Handler.java:99) 12-12 00:27:47.233: E/AndroidRuntime(7142): at android.os.Looper.loop(Looper.java:137) 12-12 00:27:47.233: E/AndroidRuntime(7142): at android.app.ActivityThread.main(ActivityThread.java:4511) 12-12 00:27:47.233: E/AndroidRuntime(7142): at java.lang.reflect.Method.invokeNative(Native Method) 12-12 00:27:47.233: E/AndroidRuntime(7142): at java.lang.reflect.Method.invoke(Method.java:511) 12-12 00:27:47.233: E/AndroidRuntime(7142): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:980) 12-12 00:27:47.233: E/AndroidRuntime(7142): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:747) 12-12 00:27:47.233: E/AndroidRuntime(7142): at dalvik.system.NativeStart.main(Native Method) 12-12 00:27:47.233: E/AndroidRuntime(7142): Caused by: java.lang.NullPointerException 12-12 00:27:47.233: E/AndroidRuntime(7142): at com.dreamappz.alamalmaarefa.QActivity.Verif(QActivity.java:87) 12-12 00:27:47.233: E/AndroidRuntime(7142): at com.dreamappz.alamalmaarefa.QActivity.onCreate(QActivity.java:47) 12-12 00:27:47.233: E/AndroidRuntime(7142): at android.app.Activity.performCreate(Activity.java:4470) 12-12 00:27:47.233: E/AndroidRuntime(7142): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1052) 12-12 00:27:47.233: E/AndroidRuntime(7142): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1931) 12-12 00:27:47.233: E/AndroidRuntime(7142): ... 11 more </code></pre>
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    1. PO
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    1. PTQuestion
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    1. USuser1896191
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    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PO
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      1. PTAnswer
    2. PO
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      1. PTAnswer
    1. This table or related slice is empty.
    1. COWhat is at line 47 of this class? If its a reference to your Question class then post that part of the code also
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      1. POandroid setonclicklistener intent null pointer exception
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    2. COSee which of your variables are null when you get to the `onClickListener`. Where do you call this class to get the `getIntentExtras`? And, what is at line 47 of this class? I only ask because it could be very pertinent
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      1. POandroid setonclicklistener intent null pointer exception
      1. UScodeMagic
 

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