salut les informaticiens , je veux passer des donnés entre mes deux activity mes ça n'a pas marchait avec ce code

erreur : java.lang.RuntimeException: Failure delivering result ResultInfo{who=null, request=1, result=-1, data=Intent { cmp=ttstpackage.tttst/.EnterDataActivity (has extras) }} to activity {ttstpackage.tttst/ttstpackage.tttst.MyActivity}: java.lang.NullPointerException
at android.app.ActivityThread.deliverResults(ActivityThread.java:3319)
at android.app.ActivityThread.performResumeActivity(ActivityThread.java:2729)
************at android.app.ActivityThread.handleResumeActivity(ActivityThread.java:2771)
************at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2235)
************at android.app.ActivityThread.access$600(ActivityThread.java:141)
************at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1234)
************at android.os.Handler.dispatchMessage(Handler.java:99)
************at android.os.Looper.loop(Looper.java:137)
************at android.app.ActivityThread.main(ActivityThread.java:5039)
************at java.lang.reflect.Method.invokeNative(Native Method)
************at java.lang.reflect.Method.invoke(Method.java:511)
************at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793)
************at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560)
************at dalvik.system.NativeStart.main(Native Method)
Caused by: java.lang.NullPointerException
at ttstpackage.tttst.MyActivity.onActivityResult(MyActivity.java:75)
at android.app.Activity.dispatchActivityResult(Activity.java:5293)
at android.app.ActivityThread.deliverResults(ActivityThread.java:3315)
************at android.app.ActivityThread.performResumeActivity(ActivityThread.java:2729)
************at android.app.ActivityThread.handleResumeActivity(ActivityThread.java:2771)
************at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2235)
************at android.app.ActivityThread.access$600(ActivityThread.java:141)
************at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1234)
************at android.os.Handler.dispatchMessage(Handler.java:99)
************at android.os.Looper.loop(Looper.java:137)
************at android.app.ActivityThread.main(ActivityThread.java:5039)
************at java.lang.reflect.Method.invokeNative(Native Method)

voila le code :
EnterDataActivity :
Code : Sélectionner tout - Visualiser dans une fenêtre à part
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 public class EnterDataActivity extends Activity {
 
    EditText   edit_name;
    EditText edit_dated, edit_datef;
 
    /**
     * Called when the activity is first created.
     */
    @Override
    public void onCreate(Bundle savedInstanceState) {
 
        super.onCreate(savedInstanceState);
        setContentView(R.layout.enter_data);
 
        edit_name = (EditText) findViewById(R.id.et_person_name);
        edit_dated = (EditText) findViewById(R.id.et_person_pin);
        edit_datef = (EditText) findViewById(R.id.et_person_pin2);
    }
 
    public void onClickAdd (View btnAdd) {
 
        String pName = edit_name.getText().toString();
        int pdated = Integer.parseInt(edit_dated.getText().toString());
        int pdatef = Integer.parseInt(edit_datef.getText().toString());
 
        if ( pName.length() != 0 && pdated != 0 && pdatef != 0 ) {
 
 
 
            Intent newIntent = getIntent();
            newIntent.putExtra("tag_pname", pName);
            newIntent.putExtra("tag_pdated", pdated);
            newIntent.putExtra("tag_pdatef", pdatef);
 
            this.setResult(RESULT_OK, newIntent);
 
            finish();
        }
    }
}
MyActivity :
Code : Sélectionner tout - Visualiser dans une fenêtre à part
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 public class MyActivity extends Activity {
 
    private CustomCursorAdapter customAdapter;
    private ProjetHelper databaseHelper;
    private static final int ENTER_DATA_REQUEST_CODE = 1;
    private ListView listView;
    String    projetName;
    int dated,datef;
 
    private static final String TAG = MyActivity.class.getSimpleName();
 
    /**
     * Called when the activity is first created.
     */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
 
        databaseHelper = new ProjetHelper(this);
 
        listView = (ListView) findViewById(R.id.list_data);
        listView.setOnItemClickListener(new OnItemClickListener() {
 
            @Override
            public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
                Log.d(TAG, "clicked on item: " + position);
            }
        });
 
        // Database query can be a time consuming task ..
        // so its safe to call database query in another thread
        // Handler, will handle this stuff for you <img src="http://s0.wp.com/wp-includes/images/smilies/icon_smile.gif?m=1129645325g" alt=":)" class="wp-smiley">
 
        new Handler().post(new Runnable() {
            @Override
            public void run() {
                customAdapter = new CustomCursorAdapter(MyActivity.this, databaseHelper.getAllData());
                listView.setAdapter(customAdapter);
            }
        });
    }
 
    public void onClickEnterData(View btnAdd) {
 
        startActivityForResult(new Intent(this, EnterDataActivity.class), ENTER_DATA_REQUEST_CODE);
 
    }
 
    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
 
        super.onActivityResult(requestCode, resultCode, data);
 
        if (requestCode == ENTER_DATA_REQUEST_CODE && resultCode == RESULT_OK) {
 
            projetName=getIntent().getExtras().getString("tag_pname");
            dated=getIntent().getExtras().getInt("tag_pdated");
            datef= getIntent().getExtras().getInt("tag_pdatef");
            MesProjets p = new MesProjets(dated,datef,projetName);
            databaseHelper.insertprojet( p);
 
            //customAdapter.changeCursor(databaseHelper.getAllData());
        }
    }
    public class CustomCursorAdapter extends CursorAdapter {
 
        public CustomCursorAdapter(Context context, Cursor c) {
            super(context, c);
        }
 
        @Override
        public View newView(Context context, Cursor cursor, ViewGroup parent) {
            // when the view will be created for first time,
            // we need to tell the adapters, how each item will look
            LayoutInflater inflater = LayoutInflater.from(parent.getContext());
            View retView = inflater.inflate(R.layout.single_row_item, parent, false);
 
            return retView;
        }
 
        @Override
        public void bindView(View view, Context context, Cursor cursor) {
            // here we are setting our data
            // that means, take the data from the cursor and put it in views
 
            TextView textViewProjetName = (TextView) view.findViewById(R.id.tv_person_name);
            textViewProjetName.setText(cursor.getString(cursor.getColumnIndex(cursor.getColumnName(1))));
 
            TextView textViewProjetdated = (TextView) view.findViewById(R.id.tv_person_pin);
            textViewProjetdated.setText(cursor.getString(cursor.getColumnIndex(cursor.getColumnName(2))));
            TextView textViewProjetdatef = (TextView) view.findViewById(R.id.tv_person_pin2);
            textViewProjetdatef.setText(cursor.getString(cursor.getColumnIndex(cursor.getColumnName(3))));
        }
    }
}