Can anyone help?
Thanks
Graham
On Nov 23, 2011 11:51 a.m., "Graham Bright" <[email protected]>
wrote:
> Hi,
>
> I am creating service which will run in the background and contain a
> blocking list (implemented using ArrayList) which may be used later
> by other activites.
>
> My Problem:-
>
>
> From my activity Services Demo I pass data to my service using
>
> dataIntent.putExtra("originator", x);
>
> this is fine but when I try to store this data in my Service in an
> ArrayList called Items I get an exception and I cannot figure out
> why.
>
> The problem is in my Service code MyService :
>
> if(items.contains(ORIG)){
> Log.d(TAG, "Element already exists exiting ");
> } else {
> Log.d(TAG, "Adding Element");
> items.add(ORIG);
>
> }
> Please help.
>
> EXCEPTION
> java.lang.RuntimeException: Unable to start service ...... with
> intent
>
> caused by: java.lang.NullPointerException
>
> Best Regards,
>
> Graham
>
> CODE Eclipse
>
> Activity -> ServicesDemo
> Service -> MyService
>
> ACTIVITY ServicesDemo
>
> package com.example;
>
> import android.app.Activity;
> import android.content.Intent;
> import android.os.Bundle;
> import android.util.Log;
> import android.view.View;
> import android.view.View.OnClickListener;
> import android.widget.Button;
> import android.widget.EditText;
>
> public class ServicesDemo extends Activity implements OnClickListener
> {
> private static final String TAG = "ServicesDemo";
> Button buttonStart, buttonStop;
> EditText Input;
> String x = ""; //test pass to my service
>
> @Override
> public void onCreate(Bundle savedInstanceState) {
> super.onCreate(savedInstanceState);
> setContentView(R.layout.main);
>
> buttonStart = (Button) findViewById(R.id.buttonStart);
> buttonStop = (Button) findViewById(R.id.buttonStop);
> Input = (EditText) findViewById(R.id.INPUT);
> buttonStart.setOnClickListener(this);
> buttonStop.setOnClickListener(this);
>
> }
>
> public void onClick(View src) {
> switch (src.getId()) {
> case R.id.buttonStart:
> Log.d(TAG, "onClick: starting srvice");
> Intent dataIntent = new Intent(ServicesDemo.this,
> MyService.class);
> x = Input.getText().toString();
> dataIntent.putExtra("originator", x);
> startService(dataIntent);
>
> break;
>
> case R.id.buttonStop:
>
> Log.d(TAG, "onClick: stopping srvice");
> //implicit starting
> stopService(new Intent(this, MyService.class));
> break;
> }
> }
>
>
> public static String getTag() {
> return TAG;
> }
> }
> -----------------------------------<end ACTIVITY>
>
>
> --Service MyService ---------
> package com.example;
>
>
> import java.util.ArrayList;
>
> import android.app.Service;
> import android.content.Intent;
> import android.os.Bundle;
> import android.os.IBinder;
> import android.util.Log;
> import android.widget.Toast;
>
> public class MyService extends Service {
>
> ArrayList<String> items;
>
> public String ORIG = "";
> private static final String TAG = "MyService";
> public Bundle data = new Bundle();
>
>
> @Override
> public IBinder onBind(Intent intent) {
> return null;
> }
>
>
> public static String getTag() {
> return TAG;
> }
>
>
> @Override
> public void onCreate() {
> Toast.makeText(this, "My Service Created",
> Toast.LENGTH_LONG).show();
> Log.d(TAG, "onCreate");
>
>
> }
>
> @Override
> public void onDestroy() {
> Toast.makeText(this, "My Service Stopped",
> Toast.LENGTH_LONG).show();
> Log.d(TAG, "onDestroy");
>
> }
>
> @Override
> public void onStart(Intent intent, int startid) {
> Log.d(TAG, "onStart");
> data = intent.getExtras();
> ORIG = data.getString("originator");
> Toast.makeText(this, "My Service Started with passed in
> value " +
> ORIG, Toast.LENGTH_LONG).show();
> if(items.contains(ORIG)){
> Log.d(TAG, "Element already exists exiting ");
> } else {
> Log.d(TAG, "Adding Element");
> items.add(ORIG);
>
> }
>
>
> Thread initBkgdThread = new Thread(new Runnable() {
> public void run() {
> //print_result();
> }
> });
> initBkgdThread.start();
>
> }
>
> public void print_result(String orig){
> Log.d(TAG, "HELLO WORLD:" + orig);
>
>
> }
>
> }
>
> --------------end of service-----------
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