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POMy second android activity wont start when button is selected
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2013-04-25T19:20:12.583
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my MainActivity opens with all the widgets working, but when i select the button to open my second activity it fails to open and the app crashes. Eclipse is showing no errors My Main Activity class: <pre><code>public class MainActivity extends FragmentActivity { private int dYear; private int dMonth; private int dDay; private int rYear; private int rMonth; private int rDay; static final int dDATE_DIALOG_ID = 0; static final int rDATE_DIALOG_ID = 1; private RadioButton buttonO = null; private RadioButton buttonR = null; private TableRow tr; TextView txD, txR; private Button btnDepart,btnReturn, btnSubmit,btnClose; private Spinner noOfPassengersSpinner,departureSpinner,returnSpinner; private CheckBox tandCCB; final Context context = this; private Bundle basket; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); buttonO = (RadioButton) findViewById(R.id.radioO); buttonR = (RadioButton) findViewById(R.id.radioR); txD=(TextView)findViewById(R.id.tvDepartureDate); txR=(TextView)findViewById(R.id.tvReturnDate); btnDepart = (Button)findViewById(R.id.btnDepart); btnReturn = (Button)findViewById(R.id.btnReturn); tr = (TableRow)findViewById(R.id.tableRow5); btnSubmit = (Button)findViewById(R.id.btnSubmit); btnClose = (Button)findViewById(R.id.btnClose); noOfPassengersSpinner = (Spinner)findViewById(R.id.noOfPassengersSpinner); departureSpinner = (Spinner)findViewById(R.id.departureSpinner); returnSpinner = (Spinner)findViewById(R.id.returnSpinner); tandCCB = (CheckBox)findViewById(R.id.tandCCB); final Calendar dC = Calendar.getInstance(); final Calendar rC = Calendar.getInstance(); dYear = dC.get(Calendar.YEAR); dMonth = dC.get(Calendar.MONTH); dDay = dC.get(Calendar.DAY_OF_MONTH); rYear = rC.get(Calendar.YEAR); rMonth = rC.get(Calendar.MONTH); rDay = rC.get(Calendar.DAY_OF_MONTH); updateDisplay(); tandCCB.setOnCheckedChangeListener(new OnCheckedChangeListener() { public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) { if(isChecked){ btnSubmit.setEnabled(true); } else{ btnSubmit.setEnabled(false); } } }); this.btnClose.setOnClickListener(new OnClickListener() { public void onClick(View v) { finish(); System.exit(0); } }); this.btnSubmit.setOnClickListener(new OnClickListener() { public void onClick(View v) { String depAir = departureSpinner.getSelectedItem().toString(); String desAir = returnSpinner.getSelectedItem().toString(); int numOfPass = Integer.parseInt(noOfPassengersSpinner.getSelectedItem().toString()); basket.putString("departureAir", depAir); basket.putString("destenationAir", desAir); basket.putInt("numOfPass", numOfPass); basket.putString("depDate", txD.getText().toString()); String type = ""; if(buttonR.isChecked()){ String returnDate = txR.getText().toString(); basket.putString("returnDate", returnDate); type = "Return"; } else{ type = "Oneway"; } basket.putString("type", type); Intent intent = new Intent(context, Second.class); intent.putExtras(basket); startActivity(intent); } }); this.buttonO.setOnClickListener(new OnClickListener() { public void onClick(View v) { tr.setVisibility(View.GONE); } }); this.buttonR.setOnClickListener(new OnClickListener() { public void onClick(View v) { tr.setVisibility(View.VISIBLE); } }); this.btnDepart.setOnClickListener(new OnClickListener() { public void onClick(View v) { showDialog(dDATE_DIALOG_ID); } }); this.btnReturn.setOnClickListener(new OnClickListener() { public void onClick(View v) { showDialog(rDATE_DIALOG_ID); } }); } @Override public boolean onCreateOptionsMenu(Menu menu) { getMenuInflater().inflate(R.menu.activity_main, menu); return true; } private void updateDisplay() { txD.setText( new StringBuilder() // Month is 0 based so add 1 .append(dYear).append("-") .append(dMonth + 1).append("-") .append(dDay).append(" ") ); txR.setText( new StringBuilder() .append(rYear).append("-") .append(rMonth + 1).append("-") .append(rDay).append(" ") ); } private DatePickerDialog.OnDateSetListener dDateSetListener = new DatePickerDialog.OnDateSetListener() { public void onDateSet(DatePicker view, int year, int monthOfYear, int dayOfMonth) { dYear = year; dMonth = monthOfYear; dDay = dayOfMonth; updateDisplay(); } }; private DatePickerDialog.OnDateSetListener rDateSetListener = new DatePickerDialog.OnDateSetListener() { public void onDateSet(DatePicker view, int year, int monthOfYear, int dayOfMonth) { rYear = year; rMonth = monthOfYear; rDay = dayOfMonth; updateDisplay(); } }; @Override protected Dialog onCreateDialog(int id) { switch (id) { case dDATE_DIALOG_ID: return new DatePickerDialog(this, dDateSetListener, dYear, dMonth, dDay); case rDATE_DIALOG_ID: return new DatePickerDialog(this, rDateSetListener, rYear, dMonth, rDay); } return null; } } </code></pre> My Second activity is: <pre><code> public class Second extends Activity { private TextView typeTv, departureTv,returnTv,departureDateTv,returnDateTv,noOfPassengersTv,tvReturnDateLbl; private RadioButton buttonR = null; public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.second); typeTv = (TextView)findViewById(R.id.typeTv); departureTv = (TextView)findViewById(R.id.departureTv); returnTv = (TextView)findViewById(R.id.returnTv); departureDateTv= (TextView)findViewById(R.id.departureTv); returnDateTv= (TextView)findViewById(R.id.returneDateTv); noOfPassengersTv = (TextView)findViewById(R.id.noOfPassengersTv); buttonR = (RadioButton) findViewById(R.id.radioR); tvReturnDateLbl = (TextView)findViewById(R.id.tvReturnDateLbl); Intent i = getIntent();//MAking an intent called i Bundle basket = this.getIntent().getExtras(); String tTv = basket.getString("type"); String dTv = basket.getString("departureAir"); String rTv = basket.getString("destinationAir"); String dDTv = basket.getString("depDateTv"); int nOPTv = basket.getInt("numOfPass"); if(buttonR.isChecked()){ String rDTv = basket.getString("returnDate"); returnDateTv.setText(rDTv); } else{ returnDateTv.setVisibility(View.GONE); tvReturnDateLbl.setVisibility(View.GONE); } typeTv.setText(tTv); departureTv.setText(dTv); returnTv.setText(rTv); departureDateTv.setText(dDTv); noOfPassengersTv.setText(""+nOPTv); } </code></pre> } And Finally my Manifest file is: <pre><code><uses-sdk android:minSdkVersion="8" android:targetSdkVersion="15" /> <application android:icon="@drawable/ic_launcher" android:label="@string/app_name" android:theme="@style/AppTheme" > <activity android:name=".MainActivity" android:label="@string/title_activity_main" > <intent-filter> <action android:name="android.intent.action.MAIN" /> <category android:name="android.intent.category.LAUNCHER" /> </intent-filter> </activity> <activity android:name=".Second" android:label="@string/app_name"> </activity> </application> </code></pre> My LogCat <pre><code>04-25 19:04:11.912: E/AndroidRuntime(999): FATAL EXCEPTION: main 04-25 19:04:11.912: E/AndroidRuntime(999): java.lang.NullPointerException 04-25 19:04:11.912: E/AndroidRuntime(999): at com.example.assignment2.MainActivity$5.onClick(MainActivity.java:121) 04-25 19:04:11.912: E/AndroidRuntime(999): at android.view.View.performClick(View.java:4084) 04-25 19:04:11.912: E/AndroidRuntime(999): at android.view.View$PerformClick.run(View.java:16966) 04-25 19:04:11.912: E/AndroidRuntime(999): at android.os.Handler.handleCallback(Handler.java:615) 04-25 19:04:11.912: E/AndroidRuntime(999): at android.os.Handler.dispatchMessage(Handler.java:92) 04-25 19:04:11.912: E/AndroidRuntime(999): at android.os.Looper.loop(Looper.java:137) 04-25 19:04:11.912: E/AndroidRuntime(999): at android.app.ActivityThread.main(ActivityThread.java:4745) 04-25 19:04:11.912: E/AndroidRuntime(999): at java.lang.reflect.Method.invokeNative(Native Method) 04-25 19:04:11.912: E/AndroidRuntime(999): at java.lang.reflect.Method.invoke(Method.java:511) 04-25 19:04:11.912: E/AndroidRuntime(999): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:786) 04-25 19:04:11.912: E/AndroidRuntime(999): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553) 04-25 19:04:11.912: E/AndroidRuntime(999): at dalvik.system.NativeStart.main(Native Method) </code></pre> My new logcat <pre><code>04-25 19:38:14.443: E/Trace(1155): error opening trace file: No such file or directory (2) 04-25 19:38:15.282: D/gralloc_goldfish(1155): Emulator without GPU emulation detected. 04-25 19:38:19.251: D/AndroidRuntime(1155): Shutting down VM 04-25 19:38:19.251: W/dalvikvm(1155): threadid=1: thread exiting with uncaught exception (group=0x40a13300) 04-25 19:38:19.281: E/AndroidRuntime(1155): FATAL EXCEPTION: main 04-25 19:38:19.281: E/AndroidRuntime(1155): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.assignment2/com.example.assignment2.Second}: java.lang.NullPointerException 04-25 19:38:19.281: E/AndroidRuntime(1155): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2059) 04-25 19:38:19.281: E/AndroidRuntime(1155): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2084) 04-25 19:38:19.281: E/AndroidRuntime(1155): at android.app.ActivityThread.access$600(ActivityThread.java:130) 04-25 19:38:19.281: E/AndroidRuntime(1155): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1195) 04-25 19:38:19.281: E/AndroidRuntime(1155): at android.os.Handler.dispatchMessage(Handler.java:99) 04-25 19:38:19.281: E/AndroidRuntime(1155): at android.os.Looper.loop(Looper.java:137) 04-25 19:38:19.281: E/AndroidRuntime(1155): at android.app.ActivityThread.main(ActivityThread.java:4745) 04-25 19:38:19.281: E/AndroidRuntime(1155): at java.lang.reflect.Method.invokeNative(Native Method) 04-25 19:38:19.281: E/AndroidRuntime(1155): at java.lang.reflect.Method.invoke(Method.java:511) 04-25 19:38:19.281: E/AndroidRuntime(1155): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:786) 04-25 19:38:19.281: E/AndroidRuntime(1155): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553) 04-25 19:38:19.281: E/AndroidRuntime(1155): at dalvik.system.NativeStart.main(Native Method) 04-25 19:38:19.281: E/AndroidRuntime(1155): Caused by: java.lang.NullPointerException 04-25 19:38:19.281: E/AndroidRuntime(1155): at com.example.assignment2.Second.onCreate(Second.java:46) 04-25 19:38:19.281: E/AndroidRuntime(1155): at android.app.Activity.performCreate(Activity.java:5008) 04-25 19:38:19.281: E/AndroidRuntime(1155): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1079) 04-25 19:38:19.281: E/AndroidRuntime(1155): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2023) 04-25 19:38:19.281: E/AndroidRuntime(1155): ... 11 more 04-25 19:38:19.441: D/dalvikvm(1155): GC_CONCURRENT freed 163K, 3% free 8303K/8519K, paused 79ms+112ms, total 315ms </code></pre>
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My second android activity wont start when button is selected
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