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POEditText.getText().toString() crashes
 

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  1. POEditText.getText().toString() crashes
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    <p>In my android application , I have 3 dialogue boxes in which the user puts info into 3 editTexts and it will display the one of the data onto another class/page after it randomly picks which data to choose. </p> <p>This is my mainClass</p> <pre><code>public class MainActivity extends Activity { //Variables are displayed in this area String choices[] = new String[3]; //EditText editText; //EditText editText2; //EditText editText3; Button mainButton ; Random rand = new Random(); int finalChoice; String displayChoice = ""; EditText editText ; EditText editText2; EditText editText3; EditText editText4; String test; int count = 3; //--------------------------- -------------------------------------------------------- @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); //Makes Button setContentView(R.layout.activity_main); declareTextBox(); setButton(); String choice1 = editText.getText().toString(); String choice2 = editText2.getText().toString(); String choice3 = editText3.getText().toString(); choices[0] = choice1; //pass from click button to method. choices[1] = choice2; choices[2] = choice3; finalChoice =rand.nextInt(2); } public void setButton() { final Button mainbutton = (Button) findViewById(R.id.mainButton); mainbutton.setOnClickListener(new View.OnClickListener() { public void onClick(View v) { test = ((EditText) findViewById(R.id.editText4)).getText().toString(); // count++; //retChoice(); // loadScreen(); Intent i = new Intent(MainActivity.this, resultScreen.class); i.putExtra("display" , displayChoice); Intent intent = new Intent(MainActivity.this,loadingScreen.class); //start the second Activity MainActivity.this.startActivity(intent); } }); } public void declareTextBox() { editText = (EditText) findViewById(R.id.editText1); editText2 = (EditText) findViewById(R.id.editText2); editText3 = (EditText) findViewById(R.id.editText3); } public void getString(String finalChoice) { finalChoice = displayChoice; } public String retChoice() { displayChoice = choices[finalChoice]; return displayChoice; } public void clearText() { editText.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { // TODO Auto-generated method stub editText.setText(" "); } }); editText2.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { // TODO Auto-generated method stub editText2.setText(" "); } }); editText3.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { // TODO Auto-generated method stub editText3.setText(" "); } }); } public void getText2() { } public void getText() { } @Override public boolean onCreateOptionsMenu(Menu menu) { // Inflate the menu; this adds items to the action bar if it is present. getMenuInflater().inflate(R.menu.main, menu); return true; } } </code></pre> <p>This is my Display class : </p> <pre><code>public class resultScreen extends Activity { MainActivity ma = new MainActivity(); //Method supposedly retrieves the string data from MainActivity Class but somehow displayed null instead. //Find a way to keep the string variable when transfering from one class to another class. String finalResult = ma.retChoice(); public void onCreate(Bundle resultScreen){ super.onCreate(resultScreen); setContentView(R.layout.resultscreen); //ma.displayChoice.toString(); String str = finalResult; TextView text = (TextView) findViewById(R.id.textView1); text.setText(str); final Button backbutton = (Button) findViewById(R.id.backButton); backbutton.setOnClickListener(new View.OnClickListener() { public void onClick(View v) { Intent intent = new Intent(resultScreen.this,MainActivity.class); resultScreen.this.startActivity(intent); } }); } } </code></pre> <p>And this is my loading screen class right after the main button is clicked</p> <pre><code>public class loadingScreen extends Activity{ protected void onCreate(Bundle loadingScreen) { // TODO Auto-generated method stub super.onCreate(loadingScreen); setContentView(R.layout.loadingscreen); //If sound clip 20 sec long we don't want to carryit outside next class // A timer thread looking for "run" method Thread timer = new Thread() { public void run() { try { //this is how many mil sec sleep(8000); } catch (InterruptedException e) { e.printStackTrace(); } finally { Intent intent = new Intent(loadingScreen.this, resultScreen.class); loadingScreen.this.startActivity(intent); loadingScreen.this.finish(); } } }; timer.start(); } </code></pre> <p>}</p> <p>My app crashes a few seconds into the loading screen when the program attempts to display the data on the resultScreen.</p> <p>Here's my logCat </p> <pre><code> 05-17 22:32:54.446: D/AndroidRuntime(1181): Shutting down VM 05-17 22:32:54.446: W/dalvikvm(1181): threadid=1: thread exiting with uncaught exception (group=0x40a70930) 05-17 22:32:54.636: E/AndroidRuntime(1181): FATAL EXCEPTION: main 05-17 22:32:54.636: E/AndroidRuntime(1181): java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{com.example.choiceprototest/com.example.choiceprototest.resultScreen}: java.lang.NullPointerException 05-17 22:32:54.636: E/AndroidRuntime(1181): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2106) 05-17 22:32:54.636: E/AndroidRuntime(1181): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2230) 05-17 22:32:54.636: E/AndroidRuntime(1181): at android.app.ActivityThread.access$600(ActivityThread.java:141) 05-17 22:32:54.636: E/AndroidRuntime(1181): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1234) 05-17 22:32:54.636: E/AndroidRuntime(1181): at android.os.Handler.dispatchMessage(Handler.java:99) 05-17 22:32:54.636: E/AndroidRuntime(1181): at android.os.Looper.loop(Looper.java:137) 05-17 22:32:54.636: E/AndroidRuntime(1181): at android.app.ActivityThread.main(ActivityThread.java:5039) 05-17 22:32:54.636: E/AndroidRuntime(1181): at java.lang.reflect.Method.invokeNative(Native Method) 05-17 22:32:54.636: E/AndroidRuntime(1181): at java.lang.reflect.Method.invoke(Method.java:511) 05-17 22:32:54.636: E/AndroidRuntime(1181): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793) 05-17 22:32:54.636: E/AndroidRuntime(1181): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560) 05-17 22:32:54.636: E/AndroidRuntime(1181): at dalvik.system.NativeStart.main(Native Method) 05-17 22:32:54.636: E/AndroidRuntime(1181): Caused by: java.lang.NullPointerException 05-17 22:32:54.636: E/AndroidRuntime(1181): at com.example.choiceprototest.MainActivity.retChoice(MainActivity.java:101) 05-17 22:32:54.636: E/AndroidRuntime(1181): at com.example.choiceprototest.resultScreen.&lt;init&gt;(resultScreen.java:18) 05-17 22:32:54.636: E/AndroidRuntime(1181): at java.lang.Class.newInstanceImpl(Native Method) 05-17 22:32:54.636: E/AndroidRuntime(1181): at java.lang.Class.newInstance(Class.java:1319) 05-17 22:32:54.636: E/AndroidRuntime(1181): at android.app.Instrumentation.newActivity(Instrumentation.java:1054) 05-17 22:32:54.636: E/AndroidRuntime(1181): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2097) 05-17 22:32:54.636: E/AndroidRuntime(1181): ... 11 more 05-17 22:33:03.385: I/Process(1181): Sending signal. PID: 1181 SIG: 9 05-17 22:33:05.435: E/Trace(1204): error opening trace file: No such file or directory (2) </code></pre> <p>Thanks guys. </p>
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    1. COPost the error message...
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    2. COWhat is at line 101 of `MainActivity`?
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    3. COAlso, its hard to follow what exactly you are doing here but if you want to pass `String` values, simply pass them through the `Intent`
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