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Editorial Team
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Asked: 2026-06-14T06:30:14+00:00

I got null pointer exception error right after I click button1. But I’m not

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I got null pointer exception error right after I click button1. But I’m not sure what is the route cause. Could someone help me?

public class FirstActivity extends Activity {
@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    Button button1 = (Button)findViewById(R.id.button1);
    button1.setOnClickListener(new ButtonClickListener());
}
class ButtonClickListener implements OnClickListener {
    public void onClick(View v){
        EditText name = (EditText)findViewById(R.id.name);
        EditText address = (EditText)findViewById(R.id.address);

        Spinner month = (Spinner)findViewById(R.id.month);
        Spinner day = (Spinner)findViewById(R.id.day);

        RadioGroup radio = (RadioGroup)findViewById(R.id.gendar);
        RadioButton radiobutton=
                (RadioButton)findViewById(radio.getCheckedRadioButtonId());

        CheckBox applecheck = (CheckBox)findViewById(R.id.applecheck);
        CheckBox orangecheck = (CheckBox)findViewById(R.id.orangecheck);
        CheckBox peachcheck = (CheckBox)findViewById(R.id.peachcheck);

        EditText appleqty = (EditText)findViewById(R.id.appleqty);
        EditText orangeqty = (EditText)findViewById(R.id.orangeqty);
        EditText peachqty = (EditText)findViewById(R.id.peachqty);

        Intent intent = new Intent(FirstActivity.this,SecondActivity.class);

        intent.putExtra("NAME", name.getText().toString());
        intent.putExtra("ADDRESS", address.getText().toString());
        intent.putExtra("MONTH",month.getSelectedItem().toString());
        intent.putExtra("DAY", day.getSelectedItem().toString());
        intent.putExtra("GENDAR", radiobutton.getText().toString());
        if(applecheck.isChecked())
            intent.putExtra("APPLE", appleqty.getText().toString());
        if(orangecheck.isChecked())
            intent.putExtra("ORANGE", orangeqty.getText().toString());
        if(peachcheck.isChecked())
            intent.putExtra("PEACH", peachqty.getText().toString());

        startActivity(intent);

    }
}

}

public class SecondActivity extends Activity {
@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_second);

    Bundle extra= getIntent().getExtras();

    String name = extra.getString("NAME");
    String address = extra.getString("ADDRESS");
    String month = extra.getString("MONTH");
    String day = extra.getString("DAY");
    String gendar = extra.getString("GENDAR");
    String apple = extra.getString("APPLE");
    String orange = extra.getString("ORANGE");
    String peach = extra.getString("PEACH");

11-11 14:38:38.681: E/AndroidRuntime(363): FATAL EXCEPTION: main
11-11 14:38:38.681: E/AndroidRuntime(363): java.lang.NullPointerException
11-11 14:38:38.681: E/AndroidRuntime(363): at com.example.sample4_3.FirstActivity$ButtonClickListener.onClick(FirstActivity.java:34)
11-11 14:38:38.681: E/AndroidRuntime(363): at android.view.View.performClick(View.java:2408)
11-11 14:38:38.681: E/AndroidRuntime(363): at android.view.View$PerformClick.run(View.java:8816)
11-11 14:38:38.681: E/AndroidRuntime(363): at android.os.Handler.handleCallback(Handler.java:587)
11-11 14:38:38.681: E/AndroidRuntime(363): at android.os.Handler.dispatchMessage(Handler.java:92)
11-11 14:38:38.681: E/AndroidRuntime(363): at android.os.Looper.loop(Looper.java:123)
11-11 14:38:38.681: E/AndroidRuntime(363): at android.app.ActivityThread.main(ActivityThread.java:4627)
11-11 14:38:38.681: E/AndroidRuntime(363): at java.lang.reflect.Method.invokeNative(Native Method)
11-11 14:38:38.681: E/AndroidRuntime(363): at java.lang.reflect.Method.invoke(Method.java:521)
11-11 14:38:38.681: E/AndroidRuntime(363): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)

New error I’m having is as follows;
11-11 16:24:39.680: E/AndroidRuntime(554): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.sample4_3/com.example.sample4_3.SecondActivity}: android.view.InflateException: Binary XML file line #126: Error inflating class textView
11-11 16:24:39.680: E/AndroidRuntime(554): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2663)
11-11 16:24:39.680: E/AndroidRuntime(554): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2679)
11-11 16:24:39.680: E/AndroidRuntime(554): at android.app.ActivityThread.access$2300(ActivityThread.java:125)
11-11 16:24:39.680: E/AndroidRuntime(554): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2033)
11-11 16:24:39.680: E/AndroidRuntime(554): at android.os.Handler.dispatchMessage(Handler.java:99)
11-11 16:24:39.680: E/AndroidRuntime(554): at android.os.Looper.loop(Looper.java:123)
11-11 16:24:39.680: E/AndroidRuntime(554): at android.app.ActivityThread.main(ActivityThread.java:4627)
11-11 16:24:39.680: E/AndroidRuntime(554): at java.lang.reflect.Method.invokeNative(Native Method)
11-11 16:24:39.680: E/AndroidRuntime(554): at java.lang.reflect.Method.invoke(Method.java:521)
11-11 16:24:39.680: E/AndroidRuntime(554): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
11-11 16:24:39.680: E/AndroidRuntime(554): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
11-11 16:24:39.680: E/AndroidRuntime(554): at dalvik.system.NativeStart.main(Native Method)
11-11 16:24:39.680: E/AndroidRuntime(554): Caused by: android.view.InflateException: Binary XML file line #126: Error inflating class textView
11-11 16:24:39.680: E/AndroidRuntime(554): at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:576)
11-11 16:24:39.680: E/AndroidRuntime(554): at android.view.LayoutInflater.rInflate(LayoutInflater.java:618)
11-11 16:24:39.680: E/AndroidRuntime(554): at android.view.LayoutInflater.rInflate(LayoutInflater.java:621)
11-11 16:24:39.680: E/AndroidRuntime(554): at android.view.LayoutInflater.rInflate(LayoutInflater.java:621)
11-11 16:24:39.680: E/AndroidRuntime(554): at android.view.LayoutInflater.rInflate(LayoutInflater.java:621)
11-11 16:24:39.680: E/AndroidRuntime(554): at android.view.LayoutInflater.inflate(LayoutInflater.java:407)
11-11 16:24:39.680: E/AndroidRuntime(554): at android.view.LayoutInflater.inflate(LayoutInflater.java:320)
11-11 16:24:39.680: E/AndroidRuntime(554): at android.view.LayoutInflater.inflate(LayoutInflater.java:276)
11-11 16:24:39.680: E/AndroidRuntime(554): at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:198)
11-11 16:24:39.680: E/AndroidRuntime(554): at android.app.Activity.setContentView(Activity.java:1647)
11-11 16:24:39.680: E/AndroidRuntime(554): at com.example.sample4_3.SecondActivity.onCreate(SecondActivity.java:14)
11-11 16:24:39.680: E/AndroidRuntime(554): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
11-11 16:24:39.680: E/AndroidRuntime(554): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2627)
11-11 16:24:39.680: E/AndroidRuntime(554): … 11 more
11-11 16:24:39.680: E/AndroidRuntime(554): Caused by: java.lang.ClassNotFoundException: android.view.textView in loader dalvik.system.PathClassLoader[/data/app/com.example.sample4_3-2.apk]
11-11 16:24:39.680: E/AndroidRuntime(554): at dalvik.system.PathClassLoader.findClass(PathClassLoader.java:243)
11-11 16:24:39.680: E/AndroidRuntime(554): at java.lang.ClassLoader.loadClass(ClassLoader.java:573)
11-11 16:24:39.680: E/AndroidRuntime(554): at java.lang.ClassLoader.loadClass(ClassLoader.java:532)
11-11 16:24:39.680: E/AndroidRuntime(554): at android.view.LayoutInflater.createView(LayoutInflater.java:466)
11-11 16:24:39.680: E/AndroidRuntime(554): at android.view.LayoutInflater.onCreateView(LayoutInflater.java:544)
11-11 16:24:39.680: E/AndroidRuntime(554): at com.android.internal.policy.impl.PhoneLayoutInflater.onCreateView(PhoneLayoutInflater.java:66)
11-11 16:24:39.680: E/AndroidRuntime(554): at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:563)
11-11 16:24:39.680: E/AndroidRuntime(554): … 23 more

Well, I can not find how to fix this error even I checked line #126.

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1 Answer

  1. Editorial Team

    Could you highlight line 34. But from what I can readily tell from your code, in ButtonClickListener, you are accessing findViewById without using the view that is passed in as a parameter. I am not sure why thats not the error as you should not be able to do that. The other thing that could be the issue is that R.id.button1 could be misspelled, or its misspelled in the xml.

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