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Abdiaziz Abdullahi Abdulle
Full Stack JavaScript Techdegree Student 7,458 PointsUnfortunately, Xaqiiqooyinka has stopped
I am trying to create the project of this question " Extra Credit Array Madness
Create a new project and add two TextViews to the screen. Create an array of numbers and see if you can display the numbers in order in the first TextView and then reversed in the second TextView. " I did my code but unfortunately the app is stopping, here is my code, please help me with what I am supposed to add:
package com.ceelcali.xaqiiqooyinka;
import android.app.Activity; import android.os.Bundle; import android.view.Menu; import android.view.MenuItem; import android.view.View; import android.widget.Button; import android.widget.TextView;
import java.util.Random;
import static android.view.View.OnClickListener;
public class MyActivity extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_my);
//Declare my Variables and assign them to the layout file
final TextView FactLabel;
FactLabel = (TextView) findViewById(R.id.FactsTextView);
Button FactsButton = (Button) findViewById(R.id.FactButton);
View.OnClickListener Listener = new OnClickListener() {
@Override
public void onClick(View view) {
String[] Numbers = {"1","2","3","4","5","6","7","8","9"};
String Number = "";
Random randomGenerator = new Random();
int randomNumber = randomGenerator.nextInt(Numbers.length);
Number = Numbers[randomNumber];
FactLabel.setText(Number);
//the button was clicked, so update the facts.
}
};
FactsButton.setOnClickListener(Listener);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.my, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
}
And Here is my Logcat
05-30 20:02:10.770 1371-1371/com.ceelcali.xaqiiqooyinka D/dalvikvm﹕ Late-enabling CheckJNI 05-30 20:02:11.110 1371-1371/com.ceelcali.xaqiiqooyinka D/AndroidRuntime﹕ Shutting down VM 05-30 20:02:11.110 1371-1371/com.ceelcali.xaqiiqooyinka W/dalvikvm﹕ threadid=1: thread exiting with uncaught exception (group=0xa4d07b20) 05-30 20:02:11.110 1371-1371/com.ceelcali.xaqiiqooyinka E/AndroidRuntime﹕ FATAL EXCEPTION: main Process: com.ceelcali.xaqiiqooyinka, PID: 1371 java.lang.RuntimeException: Unable to start activity ComponentInfo{com.ceelcali.xaqiiqooyinka/com.ceelcali.xaqiiqooyinka.MyActivity}: java.lang.NullPointerException at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2184) at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2233) at android.app.ActivityThread.access$800(ActivityThread.java:135) at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1196) at android.os.Handler.dispatchMessage(Handler.java:102) at android.os.Looper.loop(Looper.java:136) at android.app.ActivityThread.main(ActivityThread.java:5001) at java.lang.reflect.Method.invokeNative(Native Method) at java.lang.reflect.Method.invoke(Method.java:515) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:785) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:601) at dalvik.system.NativeStart.main(Native Method) Caused by: java.lang.NullPointerException at com.ceelcali.xaqiiqooyinka.MyActivity.onCreate(MyActivity.java:44) at android.app.Activity.performCreate(Activity.java:5231) at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1087) at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2148) at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2233) at android.app.ActivityThread.access$800(ActivityThread.java:135) at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1196) at android.os.Handler.dispatchMessage(Handler.java:102) at android.os.Looper.loop(Looper.java:136) at android.app.ActivityThread.main(ActivityThread.java:5001) at java.lang.reflect.Method.invokeNative(Native Method) at java.lang.reflect.Method.invoke(Method.java:515) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:785) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:601) at dalvik.system.NativeStart.main(Native Method) 05-30 20:06:46.438 1475-1475/com.ceelcali.xaqiiqooyinka W/ActivityThread﹕ Application com.ceelcali.xaqiiqooyinka is waiting for the debugger on port 8100... 05-30 20:06:46.458 1475-1475/com.ceelcali.xaqiiqooyinka I/System.out﹕ Sending WAIT chunk 05-30 20:06:47.574 1475-1480/com.ceelcali.xaqiiqooyinka I/dalvikvm﹕ Debugger is active 05-30 20:06:47.670 1475-1475/com.ceelcali.xaqiiqooyinka I/System.out﹕ Debugger has connected 05-30 20:06:47.670 1475-1475/com.ceelcali.xaqiiqooyinka I/System.out﹕ waiting for debugger to settle... 05-30 20:06:47.870 1475-1475/com.ceelcali.xaqiiqooyinka I/System.out﹕ waiting for debugger to settle... 05-30 20:06:48.070 1475-1475/com.ceelcali.xaqiiqooyinka I/System.out﹕ waiting for debugger to settle... 05-30 20:06:48.274 1475-1475/com.ceelcali.xaqiiqooyinka I/System.out﹕ waiting for debugger to settle... 05-30 20:06:48.474 1475-1475/com.ceelcali.xaqiiqooyinka I/System.out﹕ waiting for debugger to settle... 05-30 20:06:48.678 1475-1475/com.ceelcali.xaqiiqooyinka I/System.out﹕ waiting for debugger to settle... 05-30 20:06:48.878 1475-1475/com.ceelcali.xaqiiqooyinka I/System.out﹕ waiting for debugger to settle... 05-30 20:06:49.078 1475-1475/com.ceelcali.xaqiiqooyinka I/System.out﹕ waiting for debugger to settle... 05-30 20:06:49.282 1475-1475/com.ceelcali.xaqiiqooyinka I/System.out﹕ waiting for debugger to settle... 05-30 20:06:49.482 1475-1475/com.ceelcali.xaqiiqooyinka I/System.out﹕ waiting for debugger to settle... 05-30 20:06:49.686 1475-1475/com.ceelcali.xaqiiqooyinka I/System.out﹕ waiting for debugger to settle... 05-30 20:06:49.886 1475-1475/com.ceelcali.xaqiiqooyinka I/System.out﹕ waiting for debugger to settle... 05-30 20:06:50.086 1475-1475/com.ceelcali.xaqiiqooyinka I/System.out﹕ waiting for debugger to settle... 05-30 20:06:50.290 1475-1475/com.ceelcali.xaqiiqooyinka I/System.out﹕ waiting for debugger to settle... 05-30 20:06:50.490 1475-1475/com.ceelcali.xaqiiqooyinka I/System.out﹕ waiting for debugger to settle... 05-30 20:06:50.694 1475-1475/com.ceelcali.xaqiiqooyinka I/System.out﹕ debugger has settled (1441) 05-30 20:06:50.910 1475-1475/com.ceelcali.xaqiiqooyinka D/AndroidRuntime﹕ Shutting down VM 05-30 20:06:50.910 1475-1475/com.ceelcali.xaqiiqooyinka W/dalvikvm﹕ threadid=1: thread exiting with uncaught exception (group=0xa4d07b20) 05-30 20:06:50.918 1475-1475/com.ceelcali.xaqiiqooyinka E/AndroidRuntime﹕ FATAL EXCEPTION: main Process: com.ceelcali.xaqiiqooyinka, PID: 1475 java.lang.RuntimeException: Unable to start activity ComponentInfo{com.ceelcali.xaqiiqooyinka/com.ceelcali.xaqiiqooyinka.MyActivity}: java.lang.NullPointerException at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2184) at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2233) at android.app.ActivityThread.access$800(ActivityThread.java:135) at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1196) at android.os.Handler.dispatchMessage(Handler.java:102) at android.os.Looper.loop(Looper.java:136) at android.app.ActivityThread.main(ActivityThread.java:5001) at java.lang.reflect.Method.invokeNative(Native Method) at java.lang.reflect.Method.invoke(Method.java:515) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:785) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:601) at dalvik.system.NativeStart.main(Native Method) Caused by: java.lang.NullPointerException at com.ceelcali.xaqiiqooyinka.MyActivity.onCreate(MyActivity.java:44) at android.app.Activity.performCreate(Activity.java:5231) at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1087) at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2148) at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2233) at android.app.ActivityThread.access$800(ActivityThread.java:135) at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1196) at android.os.Handler.dispatchMessage(Handler.java:102) at android.os.Looper.loop(Looper.java:136) at android.app.ActivityThread.main(ActivityThread.java:5001) at java.lang.reflect.Method.invokeNative(Native Method) at java.lang.reflect.Method.invoke(Method.java:515) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:785) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:601) at dalvik.system.NativeStart.main(Native Method)
Abdiaziz Abdullahi Abdulle
Full Stack JavaScript Techdegree Student 7,458 PointsHello, James :) , line 44 is FactsButton.setOnClickListener(Listener);
Abdiaziz Abdullahi Abdulle
Full Stack JavaScript Techdegree Student 7,458 Pointsactually they're the same in the code and in the xml but still having the problem :) thanks for being helpful
James Simshaw
28,738 PointsCould you post your updated code, xml, and error message so that we can see the changes(especially any changes in the error message)?
Abdiaziz Abdullahi Abdulle
Full Stack JavaScript Techdegree Student 7,458 Pointsmy updated code = ```package com.ceelcali.xaqiiqooyinka;
import android.app.Activity; import android.os.Bundle; import android.view.Menu; import android.view.MenuItem; import android.view.View; import android.widget.Button; import android.widget.TextView;
import java.util.Random;
import static android.view.View.OnClickListener;
public class MyActivity extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_my);
//Declare my Variables and assign them to the layout file
final TextView FactLabel;
FactLabel = (TextView) findViewById(R.id.FactsTextView);
Button FactsButton = (Button) findViewById(R.id.FactButton);
View.OnClickListener Listener = new OnClickListener() {
@Override
public void onClick(View view) {
String[] Numbers = {"1","2","3","4","5","6","7","8","9"};
String Number = "";
Random randomGenerator = new Random();
int randomNumber = randomGenerator.nextInt(Numbers.length);
Number = Numbers[randomNumber];
FactLabel.setText(Number);
//the button was clicked, so update the facts.
}
};
FactsButton.setOnClickListener(Listener);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.my, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
}
My updated xml =
```<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
android:paddingBottom="@dimen/activity_vertical_margin"
tools:context=".MyActivity">
<TextView
android:text="@string/hello_world"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/textView2" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="There We Go"
android:id="@+id/textView"
android:layout_below="@+id/textView2"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
android:layout_marginTop="68dp"
android:textSize="20sp" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Here We Are"
android:id="@+id/textView3"
android:layout_below="@+id/textView"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
android:layout_marginTop="41dp"
android:textSize="20sp" />
<Button
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Show me"
android:id="@+id/FactsButton"
android:layout_toEndOf="@+id/textView2"
android:layout_centerVertical="true"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true" />
</RelativeLayout>
logcat =
05-31 16:59:48.952 1384-1384/com.ceelcali.xaqiiqooyinka D/AndroidRuntime﹕ Shutting down VM
05-31 16:59:48.952 1384-1384/com.ceelcali.xaqiiqooyinka W/dalvikvm﹕ threadid=1: thread exiting with uncaught exception (group=0xa4caeb20)
05-31 16:59:48.956 1384-1384/com.ceelcali.xaqiiqooyinka E/AndroidRuntime﹕ FATAL EXCEPTION: main
Process: com.ceelcali.xaqiiqooyinka, PID: 1384
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.ceelcali.xaqiiqooyinka/com.ceelcali.xaqiiqooyinka.MyActivity}: java.lang.NullPointerException
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2184)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2233)
at android.app.ActivityThread.access$800(ActivityThread.java:135)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1196)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:136)
at android.app.ActivityThread.main(ActivityThread.java:5001)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:515)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:785)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:601)
at dalvik.system.NativeStart.main(Native Method)
Caused by: java.lang.NullPointerException
at com.ceelcali.xaqiiqooyinka.MyActivity.onCreate(MyActivity.java:44)
at android.app.Activity.performCreate(Activity.java:5231)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1087)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2148)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2233)
at android.app.ActivityThread.access$800(ActivityThread.java:135)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1196)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:136)
at android.app.ActivityThread.main(ActivityThread.java:5001)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:515)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:785)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:601)
at dalvik.system.NativeStart.main(Native Method)
05-31 16:59:58.420 1384-1384/com.ceelcali.xaqiiqooyinka I/Process﹕ Sending signal. PID: 1384 SIG: 9
05-31 17:01:41.256 1474-1474/com.ceelcali.xaqiiqooyinka D/AndroidRuntime﹕ Shutting down VM
05-31 17:01:41.256 1474-1474/com.ceelcali.xaqiiqooyinka W/dalvikvm﹕ threadid=1: thread exiting with uncaught exception (group=0xa4caeb20)
05-31 17:01:41.260 1474-1474/com.ceelcali.xaqiiqooyinka E/AndroidRuntime﹕ FATAL EXCEPTION: main
Process: com.ceelcali.xaqiiqooyinka, PID: 1474
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.ceelcali.xaqiiqooyinka/com.ceelcali.xaqiiqooyinka.MyActivity}: java.lang.NullPointerException
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2184)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2233)
at android.app.ActivityThread.access$800(ActivityThread.java:135)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1196)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:136)
at android.app.ActivityThread.main(ActivityThread.java:5001)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:515)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:785)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:601)
at dalvik.system.NativeStart.main(Native Method)
Caused by: java.lang.NullPointerException
at com.ceelcali.xaqiiqooyinka.MyActivity.onCreate(MyActivity.java:44)
at android.app.Activity.performCreate(Activity.java:5231)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1087)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2148)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2233)
at android.app.ActivityThread.access$800(ActivityThread.java:135)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1196)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:136)
at android.app.ActivityThread.main(ActivityThread.java:5001)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:515)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:785)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:601)
at dalvik.system.NativeStart.main(Native Method)
05-31 17:01:47.688 1474-1474/com.ceelcali.xaqiiqooyinka I/Process﹕ Sending signal. PID: 1474 SIG: 9
05-31 17:22:05.376 1593-1593/com.ceelcali.xaqiiqooyinka I/Process﹕ Sending signal. PID: 1593 SIG: 9
05-31 17:24:45.752 1659-1659/com.ceelcali.xaqiiqooyinka W/ActivityThread﹕ Application com.ceelcali.xaqiiqooyinka is waiting for the debugger on port 8100...
05-31 17:24:45.756 1659-1659/com.ceelcali.xaqiiqooyinka I/System.out﹕ Sending WAIT chunk
05-31 17:24:45.936 1659-1665/com.ceelcali.xaqiiqooyinka I/dalvikvm﹕ Debugger is active
05-31 17:24:45.960 1659-1659/com.ceelcali.xaqiiqooyinka I/System.out﹕ Debugger has connected
05-31 17:24:45.960 1659-1659/com.ceelcali.xaqiiqooyinka I/System.out﹕ waiting for debugger to settle...
05-31 17:24:46.164 1659-1659/com.ceelcali.xaqiiqooyinka I/System.out﹕ waiting for debugger to settle...
05-31 17:24:46.372 1659-1659/com.ceelcali.xaqiiqooyinka I/System.out﹕ waiting for debugger to settle...
05-31 17:24:46.576 1659-1659/com.ceelcali.xaqiiqooyinka I/System.out﹕ waiting for debugger to settle...
05-31 17:24:46.776 1659-1659/com.ceelcali.xaqiiqooyinka I/System.out﹕ waiting for debugger to settle...
05-31 17:24:46.976 1659-1659/com.ceelcali.xaqiiqooyinka I/System.out﹕ waiting for debugger to settle...
05-31 17:24:47.184 1659-1659/com.ceelcali.xaqiiqooyinka I/System.out﹕ waiting for debugger to settle...
05-31 17:24:47.384 1659-1659/com.ceelcali.xaqiiqooyinka I/System.out﹕ waiting for debugger to settle...
05-31 17:24:47.588 1659-1659/com.ceelcali.xaqiiqooyinka I/System.out﹕ waiting for debugger to settle...
05-31 17:24:47.788 1659-1659/com.ceelcali.xaqiiqooyinka I/System.out﹕ waiting for debugger to settle...
05-31 17:24:47.992 1659-1659/com.ceelcali.xaqiiqooyinka I/System.out﹕ waiting for debugger to settle...
05-31 17:24:48.192 1659-1659/com.ceelcali.xaqiiqooyinka I/System.out﹕ waiting for debugger to settle...
05-31 17:24:48.396 1659-1659/com.ceelcali.xaqiiqooyinka I/System.out﹕ debugger has settled (1318)
05-31 17:24:48.568 1659-1659/com.ceelcali.xaqiiqooyinka D/AndroidRuntime﹕ Shutting down VM
05-31 17:24:48.568 1659-1659/com.ceelcali.xaqiiqooyinka W/dalvikvm﹕ threadid=1: thread exiting with uncaught exception (group=0xa4caeb20)
05-31 17:24:48.584 1659-1659/com.ceelcali.xaqiiqooyinka E/AndroidRuntime﹕ FATAL EXCEPTION: main
Process: com.ceelcali.xaqiiqooyinka, PID: 1659
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.ceelcali.xaqiiqooyinka/com.ceelcali.xaqiiqooyinka.MyActivity}: java.lang.NullPointerException
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2184)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2233)
at android.app.ActivityThread.access$800(ActivityThread.java:135)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1196)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:136)
at android.app.ActivityThread.main(ActivityThread.java:5001)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:515)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:785)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:601)
at dalvik.system.NativeStart.main(Native Method)
Caused by: java.lang.NullPointerException
at com.ceelcali.xaqiiqooyinka.MyActivity.onCreate(MyActivity.java:44)
at android.app.Activity.performCreate(Activity.java:5231)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1087)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2148)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2233)
at android.app.ActivityThread.access$800(ActivityThread.java:135)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1196)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:136)
at android.app.ActivityThread.main(ActivityThread.java:5001)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:515)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:785)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:601)
at dalvik.system.NativeStart.main(Native Method)
05-31 17:24:51.576 1659-1659/com.ceelcali.xaqiiqooyinka I/Process﹕ Sending signal. PID: 1659 SIG: 9
1 Answer
James Simshaw
28,738 PointsHello,
Its likely that either your button does not have the id of FactButton or it is not located in the activity_my.xml file. Could you double check those two are correct and try again. If this still doesn't help, could you at least post the activity_my.xml file, or post your full code on GitHub, so we can take a further look.
Abdiaziz Abdullahi Abdulle
Full Stack JavaScript Techdegree Student 7,458 PointsWELL SAID, honestly, I didn't have the id of FactsButton but as I added now, the problem is still there and I checked the xml file and there is also added the FactsButton id.
here is my activity_my.xml file
```<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" android:paddingLeft="@dimen/activity_horizontal_margin" android:paddingRight="@dimen/activity_horizontal_margin" android:paddingTop="@dimen/activity_vertical_margin" android:paddingBottom="@dimen/activity_vertical_margin" tools:context=".MyActivity">
<TextView
android:text="@string/hello_world"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/textView2" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="There We Go"
android:id="@+id/textView"
android:layout_below="@+id/textView2"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
android:layout_marginTop="68dp"
android:textSize="20sp" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Here We Are"
android:id="@+id/textView3"
android:layout_below="@+id/textView"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
android:layout_marginTop="41dp"
android:textSize="20sp" />
<Button
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Show me"
android:id="@+id/FactsButton"
android:layout_toEndOf="@+id/textView2"
android:layout_centerVertical="true"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true" />
</RelativeLayout>
James Simshaw
28,738 PointsYou actually need to either change it so its FactButton in the xml or FactsButton in the code. They need to be the same.
James Simshaw
28,738 PointsYou need to change R.id.FactButton to be R.id.FactsButton to match your xml's id of FactsButton.
Abdiaziz Abdullahi Abdulle
Full Stack JavaScript Techdegree Student 7,458 Pointsit worked, thank you very much Mr James, I really appreciate that.
James Simshaw
28,738 PointsYou're welcome. Have fun with Android development.
James Simshaw
28,738 PointsJames Simshaw
28,738 PointsHello,
Could you tell us which line of code is line 44 in MyActivity.java? Your NullPointerException is happening there, but your line spacing got clobbered when you copy and pasted your code to the forums.