Error Moving Data From One Activity to Another

Question

I am trying To Move Some Data From One Activity To another one. Using Class Application

Projects Activities :

Main_Activity.
Second_Activity.

Main Activity Code

public class MainActivity extends Activity
{
    private ApplicationSettings application;
    private Button btn;
    private EditText txt1;
    private EditText txt2;
    @Override
    protected void onCreate(Bundle savedInstanceState)
    {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        txt1 = (EditText)findViewById(R.id.txt1);
        txt2 = (EditText)findViewById(R.id.txt2);
        btn = (Button)findViewById(R.id.btn);
        btn.setOnClickListener(new View.OnClickListener()
        {
            @Override
            public void onClick(View arg0)
            {
                application = (ApplicationSettings)getApplication();
                application.setUserID(txt1.getText().toString());
                application.setUserName(txt2.getText().toString());
                Intent intent = new Intent(MainActivity.this,SecondActivity.class);
                startActivity(intent);
            }
        });
    }

    @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_main, menu);
        return true;
    }
}

============================= Second Activity Code

public class SecondActivity extends Activity 
{

    private ApplicationSettings application;
    private TextView txt1,txt2;

    @Override
    protected void onCreate(Bundle savedInstanceState) 
    {
        // TODO Auto-generated method stub
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_second);

           application = (ApplicationSettings)getApplication();

           txt1 = (TextView)findViewById(R.id.txt1);
           txt2 = (TextView)findViewById(R.id.txt2);

           txt1.setText(application.getUserID().toString());
           txt2.setText(application.getUserName().toString());
    }
}

============================== Application Class

public class ApplicationSettings extends Application
{


    String UserID;
    String UserName;

    public String getUserID()
    {
        return UserID;
    }
    public void setUserID(String userID)
    {
        UserID = userID;
    }
    public String getUserName()
    {
        return UserName;
    }
    public void setUserName(String userName)
    {
        UserName = userName;
    }

    @Override
    public void onCreate() {
        super.onCreate();

    }   
}

=============================

LogCat

11-25 15:32:31.695: E/Trace(17282): error opening trace file: No such file or directory (2)
11-25 15:32:31.960: D/libEGL(17282): loaded /system/lib/egl/libEGL_mali.so
11-25 15:32:31.965: D/libEGL(17282): loaded /system/lib/egl/libGLESv1_CM_mali.so
11-25 15:32:31.965: D/libEGL(17282): loaded /system/lib/egl/libGLESv2_mali.so
11-25 15:32:31.975: D/(17282): Device driver API match
11-25 15:32:31.975: D/(17282): Device driver API version: 10
11-25 15:32:31.975: D/(17282): User space API version: 10 
11-25 15:32:31.975: D/(17282): mali: REVISION=Linux-r2p4-02rel0 BUILD_DATE=Wed Sep 12 17:53:53 KST 2012 
11-25 15:32:32.000: D/OpenGLRenderer(17282): Enabling debug mode 0
11-25 15:32:32.005: E/SensorManager(17282): thread start
11-25 15:32:32.010: D/SensorManager(17282): registerListener :: handle = 0  name= LSM330DLC Acceleration Sensor delay= 200000 Listener= android.view.OrientationEventListener$SensorEventListenerImpl@41f68078
11-25 15:32:32.075: W/IInputConnectionWrapper(17282): showStatusIcon on inactive InputConnection
11-25 15:32:37.290: D/GestureDetector(17282): [Surface Touch Event] mSweepDown False, mLRSDCnt : -1 mTouchCnt : 2 mFalseSizeCnt:0
11-25 15:32:37.295: D/SensorManager(17282): unregisterListener::  Listener= android.view.OrientationEventListener$SensorEventListenerImpl@41f68078
11-25 15:32:37.295: D/Sensors(17282): Remain listener = Sending .. normal delay 200ms
11-25 15:32:37.295: I/Sensors(17282): sendDelay --- 200000000
11-25 15:32:37.295: D/SensorManager(17282): JNI - sendDelay
11-25 15:32:37.295: I/SensorManager(17282): Set normal delay = true
11-25 15:32:37.300: D/SensorManager(17282): registerListener :: handle = 0  name= LSM330DLC Acceleration Sensor delay= 200000 Listener= android.view.OrientationEventListener$SensorEventListenerImpl@41f69650
11-25 15:32:37.315: W/IInputConnectionWrapper(17282): getSelectedText on inactive InputConnection
11-25 15:32:37.315: W/IInputConnectionWrapper(17282): setComposingText on inactive InputConnection
11-25 15:32:37.315: W/IInputConnectionWrapper(17282): getExtractedText on inactive InputConnection
11-25 15:32:41.350: D/SensorManager(17282): unregisterListener::  Listener= android.view.OrientationEventListener$SensorEventListenerImpl@41f69650
11-25 15:32:41.350: D/Sensors(17282): Remain listener = Sending .. normal delay 200ms
11-25 15:32:41.350: I/Sensors(17282): sendDelay --- 200000000
11-25 15:32:41.350: D/SensorManager(17282): JNI - sendDelay
11-25 15:32:41.350: I/SensorManager(17282): Set normal delay = true
11-25 15:32:41.620: W/IInputConnectionWrapper(17282): showStatusIcon on inactive InputConnection
11-25 15:32:46.200: D/SensorManager(17282): registerListener :: handle = 0  name= LSM330DLC Acceleration Sensor delay= 200000 Listener= android.view.OrientationEventListener$SensorEventListenerImpl@41f8b4c8
11-25 15:32:47.170: D/GestureDetector(17282): [Surface Touch Event] mSweepDown False, mLRSDCnt : -1 mTouchCnt : 2 mFalseSizeCnt:0
11-25 15:32:47.175: D/SensorManager(17282): unregisterListener::  Listener= android.view.OrientationEventListener$SensorEventListenerImpl@41f8b4c8
11-25 15:32:47.175: D/Sensors(17282): Remain listener = Sending .. normal delay 200ms
11-25 15:32:47.175: I/Sensors(17282): sendDelay --- 200000000
11-25 15:32:47.175: D/SensorManager(17282): JNI - sendDelay
11-25 15:32:47.175: I/SensorManager(17282): Set normal delay = true
11-25 15:32:47.180: D/SensorManager(17282): registerListener :: handle = 0  name= LSM330DLC Acceleration Sensor delay= 200000 Listener= android.view.OrientationEventListener$SensorEventListenerImpl@41f8c6b8
11-25 15:32:47.210: W/IInputConnectionWrapper(17282): getSelectedText on inactive InputConnection
11-25 15:32:47.210: W/IInputConnectionWrapper(17282): setComposingText on inactive InputConnection
11-25 15:32:47.210: W/IInputConnectionWrapper(17282): getExtractedText on inactive InputConnection
11-25 15:32:50.470: D/GestureDetector(17282): [Surface Touch Event] mSweepDown False, mLRSDCnt : -1 mTouchCnt : 2 mFalseSizeCnt:0
11-25 15:32:50.475: D/SensorManager(17282): unregisterListener::  Listener= android.view.OrientationEventListener$SensorEventListenerImpl@41f8c6b8
11-25 15:32:50.475: D/Sensors(17282): Remain listener = Sending .. normal delay 200ms
11-25 15:32:50.475: I/Sensors(17282): sendDelay --- 200000000
11-25 15:32:50.475: D/SensorManager(17282): JNI - sendDelay
11-25 15:32:50.475: I/SensorManager(17282): Set normal delay = true
11-25 15:32:50.480: D/SensorManager(17282): registerListener :: handle = 0  name= LSM330DLC Acceleration Sensor delay= 200000 Listener= android.view.OrientationEventListener$SensorEventListenerImpl@41f8b4c8
11-25 15:32:50.490: W/IInputConnectionWrapper(17282): getSelectedText on inactive InputConnection
11-25 15:32:50.490: W/IInputConnectionWrapper(17282): setComposingText on inactive InputConnection
11-25 15:32:50.490: W/IInputConnectionWrapper(17282): getExtractedText on inactive InputConnection
11-25 15:32:53.000: D/GestureDetector(17282): [Surface Touch Event] mSweepDown False, mLRSDCnt : -1 mTouchCnt : 3 mFalseSizeCnt:0
11-25 15:32:53.160: D/AndroidRuntime(17282): Shutting down VM
11-25 15:32:53.160: W/dalvikvm(17282): threadid=1: thread exiting with uncaught exception (group=0x412862a0)
11-25 15:32:53.175: E/AndroidRuntime(17282): FATAL EXCEPTION: main
11-25 15:32:53.175: E/AndroidRuntime(17282): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.test01/com.example.test01.SecondActivity}: java.lang.NullPointerException
11-25 15:32:53.175: E/AndroidRuntime(17282):    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2100)
11-25 15:32:53.175: E/AndroidRuntime(17282):    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2125)
11-25 15:32:53.175: E/AndroidRuntime(17282):    at android.app.ActivityThread.access$600(ActivityThread.java:140)
11-25 15:32:53.175: E/AndroidRuntime(17282):    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1227)
11-25 15:32:53.175: E/AndroidRuntime(17282):    at android.os.Handler.dispatchMessage(Handler.java:99)
11-25 15:32:53.175: E/AndroidRuntime(17282):    at android.os.Looper.loop(Looper.java:137)
11-25 15:32:53.175: E/AndroidRuntime(17282):    at android.app.ActivityThread.main(ActivityThread.java:4898)
11-25 15:32:53.175: E/AndroidRuntime(17282):    at java.lang.reflect.Method.invokeNative(Native Method)
11-25 15:32:53.175: E/AndroidRuntime(17282):    at java.lang.reflect.Method.invoke(Method.java:511)
11-25 15:32:53.175: E/AndroidRuntime(17282):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1008)
11-25 15:32:53.175: E/AndroidRuntime(17282):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:775)
11-25 15:32:53.175: E/AndroidRuntime(17282):    at dalvik.system.NativeStart.main(Native Method)
11-25 15:32:53.175: E/AndroidRuntime(17282): Caused by: java.lang.NullPointerException
11-25 15:32:53.175: E/AndroidRuntime(17282):    at com.example.test01.SecondActivity.onCreate(SecondActivity.java:26)
11-25 15:32:53.175: E/AndroidRuntime(17282):    at android.app.Activity.performCreate(Activity.java:5191)
11-25 15:32:53.175: E/AndroidRuntime(17282):    at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1094)
11-25 15:32:53.175: E/AndroidRuntime(17282):    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2064)
11-25 15:32:53.175: E/AndroidRuntime(17282):    ... 11 more
11-25 15:32:53.195: D/dalvikvm(17282): GC_CONCURRENT freed 180K, 9% free 12405K/13575K, paused 12ms+2ms, total 31ms

I need To Pass Data From the DditTexts on the main activity to the TextView in Second_activity

Thanks In Advance

Regards

Thank you , Yes Actually i Forget to Add the Activity the the manifest File ,, I Added to the file ... but now there is another error when [assing the data between activiteies I update the second code and the logcat in the main post — Loai, Nov 25 '12 at 12:37
it's Working Now ,, BUT Still Have Problem to move data from activity to another activity . Regards . — Loai, Nov 25 '12 at 12:43
Do You Mean The Way i Save The Data In The Application Class Is Wrong ,, Or It Can Be Easier More That Application Class ? — Loai, Nov 25 '12 at 12:48
you are sending data from activity one to activity two right? — Android Developer, Nov 25 '12 at 12:50
then u need to send the data with the intent and as I see in ur code, u r sending an empty intent — Android Developer, Nov 25 '12 at 12:50
Intent intent = new Intent(MainActivity.this,SecondActivity.class); intent.putExtra(name,value); startActivity(intent); — Android Developer, Nov 25 '12 at 12:51
@NancyKhleif : why he use intent for sharing data between Activity because he is doing right and Application Class is also a way to share data between application components — ρяσѕρєя K, Nov 25 '12 at 12:51
@imran: if that way is right then its ok,, because I usually use intent to send data between activities :) — Android Developer, Nov 25 '12 at 12:53
@NancyKhleif - Which Is Bettet Application Or `PutExtra()` Method ? And How I Can Recieve A data From It In Second Activity ? — Loai, Nov 25 '12 at 12:54
I didn't use your way before, so I don't know but from my experience Intents and putExtra is pretty easy ! — Android Developer, Nov 25 '12 at 12:56
@NancyKhleif If I Use Your Way ,, In SecondActivity How Can I Get The Data From The Intent ? — Loai, Nov 25 '12 at 12:57
check this it may help http://stackoverflow.com/questions/4233873/how-to-get-extra-data-from-intent-in-android — Android Developer, Nov 25 '12 at 12:59

score 3 · Accepted Answer · answered Nov 25 '12 at 12:24

3

As your Logs as :

have you declared this activity in your AndroidManifest.xml?

means make sure you have declared SecondActivity.class activity in AndroidManifest as :

<Activity android:name=".SecondActivity" />

if you have declared it then make sure it's in same package or have same name as you have created in SecondActivity.java

if you have SecondActivity in different Package then declare it in AndroidManifest as :

<Activity android:name="<FULL_PACKAGE_NAME>.SecondActivity" />

answered Nov 25 '12 at 12:24

ρяσѕρєя K

132,198
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Thank you , Yes Actually i Forget to Add the Activity the the manifest File ,, I Added to the file ... but now there is another error when [assing the data between activiteies I update the second code and the logcat in the main post – Loai Nov 25 '12 at 12:38
where is line SecondActivity.java:26? – ρяσѕρєя K Nov 25 '12 at 12:40
i mean what is line number 26 in SecondActivity.java? – ρяσѕρєя K Nov 25 '12 at 12:42
`txt2.setText(application.getUserName().toString());` – Loai Nov 25 '12 at 12:44
are you sure you have txt2 TextView in activity_second.xml layout? – ρяσѕρєя K Nov 25 '12 at 12:46
1

or use this.UserName = userName; and this.UserID = userID; in appliction class – ρяσѕρєя K Nov 25 '12 at 12:50
It WORKS Fine After Clean The Project and add `This` before Property Thank You So Much ,,, Is There is another way to move data between activities without using an application Class ?? – Loai Nov 25 '12 at 12:52
let us [continue this discussion in chat](http://chat.stackoverflow.com/rooms/20066/discussion-between-loai-alhalabi-and-imran-khan) – Loai Nov 25 '12 at 13:00

Error Moving Data From One Activity to Another

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