Unknown error: Unable to build: the file dx.jar was not loaded from the SDK folder!

This error is annoying and seemingly hard to find a way to fix it.

I got it will Eclipse Luna (4.4.1) and the latest SDK and ADT.

After much messing around – I found the way to fix is to remove Android SDK Tools. SDK Platform-tools and Build-Tools (you might not need to remove al three but I tried platform-tools by itself and it didn’t work)tools

 

and then re-installed them. Restart Eclipse and the error should be gone!

Huawei UK’s support or lack of it

On Oct 30th I contacted Huawei UK re an Ascend P1 that was not powering on. I posted the phone back to them on the same day (Oct 30th 2013).

I rang on the 12th November to get an update from Huawei about the status of the repair as I had not heard from them. The Huawei tech support team said that the item had been posted out to me 4 days previously so I assumed the phone would arrive to me the next day. I am in the Rep of Ireland and I had sent the phone to the UK to get repaired. So if the phone had been posted on the 8th of November then usually I would have received it on or before the 15th November.

On the 20th November I rang Huawei to again check the status of the phone repair as I still had not received the phone. Dan the Huawei customer support rep gave me a Royal Mail tracking number – when I checked this number later that day it turned out the phone had been delivered – but in Norwich and had been signed for. So it turns out my phone had been sent but somehow was in Norwich in the UK….not Tralee in the Rep of Ireland.

So on the 22nd November (phone call no 4) I rang Huawei again and was talking to Christine. She was not very helpful and couldn’t even say where my phone was. She said I should ring Royal Mail, but as I could see Royal Mail had already delivered the phone to an address in Norwich there was not much point in me ringing them. Also as I hadn’t sent the package I was not the customer of Royal Mail…Huawei were. She eventually said the phone was in the repair centre and would be sent out as soon as possible. As I was quite frustrated at this point I said I would like the phone by 29/November/2013 or a full refund. Which would have allowed them time to post it to me or to courier it. I also said if there was any issue/problem with returning the phone I would appreciate being contacted by email or phone.

So….on the 29th November I rang Huawei Tech Support again….5th call. I was talking to Sam (who again was not very helpful). He at first got me to explain the situation even though he should have the information in front of him. He then stated that I should ring the Repair Centre – I explained to him that as a Huawei representative shouldn’t it be his job to find out where my phone was. I then asked to talk to his superior and he put me on hold. When he returned he said his manager was unavailable to talk to me but he had magically contacted the repair centre and my phone was still there. So 20 days after my phone was sent to me it was somehow still in their repair centre. I then asked could he escalate this issue and he said as they are a contracted company to Huawei that he couldn’t. I asked him could he escalate it to someone in the repair company and he couldn’t. I asked him about contacting Huawei directly and he said they had no real presence in the UK. He said that the phone would be posted today….(not sure how I am meant to believe that) and that he could not help me any further re a refund or escalating the issue. I have contacted Huawei previously through email & twitter where I got responseson the 26th November by never received any update from them after that.

So I am now looking at taking legal advice re the next steps as I have no other way to contact them and having already wasted over €20 ringing them I am put off wasting more money and time without any real progress.

 

 

 

Android Twitter oAuth with Twitter4j (without signpost)

Basic Code for Twitter oAuth for Android works with any version of Android I have tested it against – will crash if no Internet access but adding a check for this is relevantly simple (wanted to keep the code just about the oAuth process – the core idea and code comes from this blogpost

AndroidBasicOAuthActivity Code

package me.crowleydavid.android.basicoauth;

import twitter4j.Twitter;
import twitter4j.TwitterException;
import twitter4j.TwitterFactory;
import twitter4j.auth.AccessToken;
import twitter4j.auth.RequestToken;
import twitter4j.conf.Configuration;
import twitter4j.conf.ConfigurationBuilder;
import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.content.SharedPreferences;
import android.net.ConnectivityManager;
import android.net.NetworkInfo;
import android.os.Bundle;
import android.preference.PreferenceManager;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.Toast;

public class AndroidBasicOAuthActivity extends Activity {
    private int TWITTER_AUTH;
    private Twitter mTwitter;
    private RequestToken mRequestToken;

    private String accessToken;
    private String accessTokenSecret;

    private boolean haveConnectedWifi;
    private boolean haveConnectedMobile;
    private double x;

    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);

        SharedPreferences settings = PreferenceManager.getDefaultSharedPreferences(this);
        accessToken = settings.getString( "twitter_access_token", null );
        accessTokenSecret = settings.getString( "twitter_access_token_secret", null );
        Button tweetB = (Button) findViewById(R.id.tweet_button);
        tweetB.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View v) {
                // TODO Auto-generated method stub
                updateStatus();

            }
        });

    }
    private boolean haveNetworkConnection() {
        haveConnectedWifi = false;
        haveConnectedMobile = false;

        ConnectivityManager cm = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
        NetworkInfo[] netInfo = cm.getAllNetworkInfo();
        for (NetworkInfo ni : netInfo) {
            if (ni.getTypeName().equalsIgnoreCase("WIFI"))
                if (ni.isConnected())
                    haveConnectedWifi = true;
            if (ni.getTypeName().equalsIgnoreCase("MOBILE"))
                if (ni.isConnected())
                    haveConnectedMobile = true;
        }
        return haveConnectedWifi || haveConnectedMobile;
    }

// private void updateStatusLoggedIn() {
// SharedPreferences settings = PreferenceManager.getDefaultSharedPreferences(this);
// accessToken = settings.getString( "twitter_access_token", null );
// accessTokenSecret = settings.getString( "twitter_access_token_secret", null );
//
// // String s2 = String.valueOf(i);
// // Toast.makeText(this, s2, 10000).show();
// ConfigurationBuilder builder = new ConfigurationBuilder();
// builder.setOAuthConsumerKey(Constants.CONSUMER_KEY);
// builder.setOAuthConsumerSecret(Constants.CONSUMER_SECRET);
// builder.setOAuthAccessToken(accessToken);
// builder.setOAuthAccessTokenSecret(accessTokenSecret);
// Configuration conf = builder.build();
// Twitter t = new TwitterFactory(conf).getInstance();
// i++;
// try {
// if(i<10){
// t.updateStatus( "Loggedin" + i);
// }
// }
// catch (TwitterException e) {
// e.printStackTrace();
// }
//
// }

    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        // TODO Auto-generated method stub

        if (requestCode == TWITTER_AUTH)
        {

            if (resultCode == Activity.RESULT_OK)
            {
                Toast.makeText(this, "Hey Ho", 300).show();
                String oauthVerifier = (String) data.getExtras().get("oauth_verifier");

                AccessToken at = null;

                try
                {
                    // Pair up our request with the response
                    at = mTwitter.getOAuthAccessToken(oauthVerifier);
                    String theToken = at.getToken();
                    // Toast.makeText(this, theToken, 10000).show();
                    String theTokenSecret = at.getTokenSecret();
                    // Toast.makeText(this, theTokenSecret, 10000).show();
                    SharedPreferences settings = PreferenceManager.getDefaultSharedPreferences(this);
                    settings = PreferenceManager.getDefaultSharedPreferences(this);
                    SharedPreferences.Editor editor = settings.edit();
                    editor.putString("twitter_access_token",theToken);
                    editor.putString("twitter_access_token_secret", theTokenSecret);
                    editor.commit();

                    // his method
                    // settings.edit()
                    // .putString( "twitter_access_token", at.getToken() )
                    // .putString( "twitter_access_token_secret", at.getTokenSecret() )
                    // .commit();
                    // Intent i = new Intent(this, someclass.class);
                    // startActivity(i);

                    updateStatus();
                }
                catch (TwitterException e)
                {
                    e.printStackTrace();
                }
            }
        }
        else
        {
            Toast.makeText(this, "uh oh, Spaghetti Os", 300).show();
        }

    }
    private void updateStatus() {
        // TODO Auto-generated method stub
        SharedPreferences settings = PreferenceManager.getDefaultSharedPreferences(this);
        accessToken = settings.getString( "twitter_access_token", null );
        accessTokenSecret = settings.getString( "twitter_access_token_secret", null );
        // Toast.makeText(this, accessToken, 10000).show();
        // Toast.makeText(this, accessTokenSecret, 10000).show();
        haveNetworkConnection();
        if ((haveConnectedWifi)|| (haveConnectedMobile)){
            ConfigurationBuilder builder = new ConfigurationBuilder();
            builder.setOAuthConsumerKey(Constants.CONSUMER_KEY);
            builder.setOAuthConsumerSecret(Constants.CONSUMER_SECRET);
            builder.setOAuthAccessToken(accessToken);
            builder.setOAuthAccessTokenSecret(accessTokenSecret);
            Configuration conf = builder.build();
            Twitter t = new TwitterFactory(conf).getInstance();

            try {
                x = Math.random();
                t.updateStatus( "Yo ho ho and a bottle of rum " + x);

            }
            catch (TwitterException e) {
                e.printStackTrace();
            }
        }
        else{
            Toast.makeText(this, "No access to Internet..please try again", 3000).show();
        }
    }
    @Override
    protected void onResume() {
        // TODO Auto-generated method stub
        super.onResume();
        SharedPreferences settings = PreferenceManager.getDefaultSharedPreferences(this);

        accessToken = settings.getString( "twitter_access_token", null );
        accessTokenSecret = settings.getString( "twitter_access_token_secret", null );
        haveNetworkConnection();
        if ((haveConnectedWifi)|| (haveConnectedMobile)){
            // Toast.makeText(this, "Internet is go!", 3000).show();
            // Intent i = new Intent(this, AndroidBasicOAuthActivity.class);
            // startActivity(i);

            if ((accessToken==null)||(accessTokenSecret==null)){
                mTwitter = new TwitterFactory().getInstance();
                mRequestToken = null;
                mTwitter.setOAuthConsumer(Constants.CONSUMER_KEY,Constants.CONSUMER_SECRET );
                String callbackURL = getResources().getString(R.string.twitter_callback);
                try
                {
                    mRequestToken = mTwitter.getOAuthRequestToken(callbackURL);
                }
                catch (TwitterException e)
                {
                    e.printStackTrace();
                }
                Intent i = new Intent(this, TwitterWebviewActivity.class);
                i.putExtra("URL", mRequestToken.getAuthenticationURL());
                startActivityForResult(i, TWITTER_AUTH);
            }
            else{
                Toast.makeText(this, "Token found..logged in", 3000).show();
                // updateStatusLoggedIn();
            }
        }
        else{
            Toast.makeText(this, "No access to Internet..please try again", 3000).show();
            Intent i = new Intent(this, CheckNetAccess.class);
            startActivity(i);
        }
    }
}

Constants Code you need to enter your own Twitter Developer keys here

package me.crowleydavid.android.basicoauth;

public class Constants {

    public static final String CONSUMER_KEY = "************";
    public static final String CONSUMER_SECRET= "**************";

TwitterWebviewActivity Code
package me.crowleydavid.android.basicoauth;

import android.app.Activity;
import android.content.Intent;
import android.net.Uri;
import android.os.Bundle;
import android.webkit.WebView;
import android.webkit.WebViewClient;

public class TwitterWebviewActivity extends Activity {
    private Intent mIntent;
    public void onCreate(Bundle savedInstanceState)
    {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.twitter_webview);
        mIntent = getIntent();
        String url = (String)mIntent.getExtras().get("URL");
        WebView webView = (WebView) findViewById(R.id.webview);
        webView.setWebViewClient( new WebViewClient()
        {
            @Override
            public boolean shouldOverrideUrlLoading(WebView view, String url)
            {
                if( url.contains(getResources().getString( R.string.twitter_callback )))
                {
                    Uri uri = Uri.parse( url );
                    String oauthVerifier = uri.getQueryParameter( "oauth_verifier" );
                    mIntent.putExtra( "oauth_verifier", oauthVerifier );
                    setResult( RESULT_OK, mIntent );
                    finish();
                    return true;
                }
                return false;
            }
        });
        webView.loadUrl(url);
    }
}

}

CheckNetAccess Code

package me.crowleydavid.android.basicoauth;

import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.net.ConnectivityManager;
import android.net.NetworkInfo;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.Toast;

public class CheckNetAccess extends Activity {
    private boolean haveConnectedWifi;
    private boolean haveConnectedMobile;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        // TODO Auto-generated method stub
        super.onCreate(savedInstanceState);
        setContentView(R.layout.checknet);
        Button netB = (Button) findViewById(R.id.netbutton);
        netB.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View v) {
                // TODO Auto-generated method stub
                haveNetworkConnection();
                if ((haveConnectedWifi)|| (haveConnectedMobile)){
                    Toast.makeText(CheckNetAccess.this, "Internet is go!", 3000).show();
                    Intent i = new Intent(CheckNetAccess.this, AndroidBasicOAuthActivity.class);
                    startActivity(i);
                }
                else{
                    Toast.makeText(CheckNetAccess.this, "No access to Internet..please try again", 3000).show();
                }
            }
        });

    }

    private boolean haveNetworkConnection() {
        haveConnectedWifi = false;
        haveConnectedMobile = false;

        ConnectivityManager cm = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
        NetworkInfo[] netInfo = cm.getAllNetworkInfo();
        for (NetworkInfo ni : netInfo) {
            if (ni.getTypeName().equalsIgnoreCase("WIFI"))
                if (ni.isConnected())
                    haveConnectedWifi = true;
            if (ni.getTypeName().equalsIgnoreCase("MOBILE"))
                if (ni.isConnected())
                    haveConnectedMobile = true;
        }
        return haveConnectedWifi || haveConnectedMobile;
    }
    @Override
    protected void onResume() {
        // TODO Auto-generated method stub
        super.onResume();
    }

}

Android Manifest needs these permissions

<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.READ_PHONE_STATE" />

AndroidBasicOAuth

Rotation Vector Sensor Android – Gyroscope

After messing around with sensors for a while and tried to see what TYPE_ROTATION_VECTOR actually returned as values. The docs seemed pretty sparse to me!

But whenever I tried to run a simple program to display the sensor output the activity crashed….due to a null pointer exception. Read a few posts and none was very clear….some mentioned that a gyroscope was needed…

Found this post which implies the device needs a gyroscope to implement a Rotation Vector Sensor.

Not 100% but as much information as I can find online!

Displaying a list of Sensors available on an Android device (Gingerbread) 2.3.3 used

Code below displays all available sensors (hardware and virtual)

import java.util.List;
import android.app.Activity;
import android.hardware.Sensor;
import android.hardware.SensorEvent;
import android.hardware.SensorEventListener;
import android.hardware.SensorManager;
import android.os.Bundle;
import android.widget.TextView;

public class SensorListActivity extends Activity implements SensorEventListener {
	private SensorManager mSensorManager;
	private TextView mTextView;

	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.main);
		mSensorManager = (SensorManager) getSystemService(SENSOR_SERVICE);
		mTextView = (TextView) findViewById(R.id.text_view);

		List<Sensor> mList
        = mSensorManager.getSensorList(Sensor.TYPE_ALL);
		for (int i = 1; i < mList.size(); i++) {
			mTextView.append("\n" + mList.get(i).getName());
			}
	}

	@Override
	public void onAccuracyChanged(Sensor arg0, int arg1) {
		// TODO Auto-generated method stub

	}

	@Override
	public void onSensorChanged(SensorEvent event) {
		// TODO Auto-generated method stub 

	}
	protected void onPause(){
		super.onStop();
	}
	protected void onStop() {
		super.onStop();
	}
	protected void onResume()
	{
		super.onResume();
	}

}

main.xml (just a textview to show the list of sensors)

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    >
<TextView
	android:id="@+id/text_view"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content" 

    />
</LinearLayout>
Sensors list displayed on Nexus One
Sensors list displayed on Nexus One