NullPointerException on getting current location value (lat, lng) Google Maps - java

My code on getting current location is working when I'm using map fragment, but when I use it in another class without displaying the map, I'm getting nullpointerException in String provider. Can you please check what's wrong with my program and if possible explain why I'm getting this error.
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// TODO Auto-generated method stub
View v = inflater
.inflate(R.layout.layout_school_list, container, false);
lvList = (ListView) v.findViewById(R.id.lvSchools);
LocationManager locationManager = (LocationManager) getSystemService("location");
Criteria criteria = new Criteria();
String provider = locationManager.getBestProvider(criteria, true);
final Location currentLoc = locationManager
.getLastKnownLocation(provider);
if (currentLoc != null) {
onLocationChanged(currentLoc);
}
if (Distance==true){
double lat = currentLoc.getLatitude();
double lng = currentLoc.getLongitude();
ArrayList<Double> rangeList = getRangeList(lat, lng);
ArrayList<String> theList1 = new ArrayList<String>();
for (int count = 0; count < rangeList.size(); count++)
{
String temp = sTuition[count];
theTuitionFee = Integer.parseInt(temp);
for(int subloop=0; subloop<sSpecialty[count].length; subloop++) {
List<String> values = (List<String>)thisFilter[4];
if (rangeList.get(count) <= DistanceVal
&&sReg[count].equalsIgnoreCase((String)thisFilter[0])
&& sAdmin[count].equalsIgnoreCase((String)thisFilter[1])
&& sAmbience[count].equalsIgnoreCase((String)thisFilter[3])
&& amountTF >= theTuitionFee
&& filtered(sSpecialty[count][subloop], values)) {
theList1.add(sList[count]);
}
}
}
displayNearbyList(theList1);
}
Here's my methods:
public void onLocationChanged(Location location) {
double currentLat = location.getLatitude();
double currentLng = location.getLongitude();
}
And also getting error with getSystemService and my IDE requires me to put this
private LocationManager getSystemService(String string) {
// TODO Auto-generated method stub
return null;
}
which is not used in my other working class.
Here's my stack trace . I'm new here , so I don't know how to post stack trace properly
08-29 12:14:45.017: E/AndroidRuntime(6864): FATAL EXCEPTION: main
08-29 12:14:45.017: E/AndroidRuntime(6864): java.lang.NullPointerException
08-29 12:14:45.017: E/AndroidRuntime(6864): at capstone.app.recommender.SchoolListFragmentFilter.onCreateView(SchoolListFragmentFilter.java:67)
08-29 12:14:45.017: E/AndroidRuntime(6864): at android.support.v4.app.Fragment.performCreateView(Fragment.java:1786)
08-29 12:14:45.017: E/AndroidRuntime(6864): at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:947)
08-29 12:14:45.017: E/AndroidRuntime(6864): at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1126)
08-29 12:14:45.017: E/AndroidRuntime(6864): at android.support.v4.app.BackStackRecord.run(BackStackRecord.java:739)
08-29 12:14:45.017: E/AndroidRuntime(6864): at android.support.v4.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1489)
08-29 12:14:45.017: E/AndroidRuntime(6864): at android.support.v4.app.FragmentManagerImpl$1.run(FragmentManager.java:454)
08-29 12:14:45.017: E/AndroidRuntime(6864): at android.os.Handler.handleCallback(Handler.java:725)
08-29 12:14:45.017: E/AndroidRuntime(6864): at android.os.Handler.dispatchMessage(Handler.java:92)
08-29 12:14:45.017: E/AndroidRuntime(6864): at android.os.Looper.loop(Looper.java:137)
08-29 12:14:45.017: E/AndroidRuntime(6864): at android.app.ActivityThread.main(ActivityThread.java:5041)
08-29 12:14:45.017: E/AndroidRuntime(6864): at java.lang.reflect.Method.invokeNative(Native Method)
08-29 12:14:45.017: E/AndroidRuntime(6864): at java.lang.reflect.Method.invoke(Method.java:511)
08-29 12:14:45.017: E/AndroidRuntime(6864): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793)
08-29 12:14:45.017: E/AndroidRuntime(6864): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560)
08-29 12:14:45.017: E/AndroidRuntime(6864): at dalvik.system.NativeStart.main(Native Method)

You should replace your line
LocationManager locationManager = (LocationManager) getSystemService("location");
With this one
LocationManager locationManager = (LocationManager)<your context>.getSystemService(Context.LOCATION_SERVICE);

private LocationManager getSystemService(String string) {
// TODO Auto-generated method stub
return null;
}
This is the method you have to imlpement by yourself, as you return null. the locationManager below is null, and therefore throws NullPointerException
String provider = locationManager.getBestProvider(criteria, true);
check the post below to know how should you implement getSystemService()
How does getSystemService() work exactly?

Related

Fatal exception at main android during dropbox authentication [duplicate]

This question already exists:
Dropbox Core API is not working. I don't want to hardcode app key and secret?
Closed 7 years ago.
I am getting fatal exception error at main nullpointer exception. basically i have 2 activities login and main activity.you will enter app key and app secret in login activity then after authentication it will take you to main activity any help ??
login activity
public class login_activity extends AppCompatActivity {
public String APP_kEY ;
public String APP_SECRET;
public String accessToken;
EditText app_key_view;
EditText App_secret_view;
Button dropbox;
public DropboxAPI<AndroidAuthSession> mDBApi;
#Override
protected void onCreate(Bundle savedInstanceState) {
SharedPreferences pref = getSharedPreferences("login",MODE_PRIVATE);
APP_kEY = pref.getString("appkey",null);
APP_SECRET = pref.getString("appsecret",null);
accessToken = pref.getString("access",null);
if (accessToken != null){
AppKeyPair appkeys = new AppKeyPair(APP_kEY,APP_SECRET);
AndroidAuthSession session = new AndroidAuthSession(appkeys);
session.setOAuth2AccessToken(accessToken);
Intent i = new Intent(login_activity.this,MainActivity.class);
startActivity(i);
finish();
}
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_login_activity);
app_key_view=(EditText)findViewById(R.id.app_key_text);
App_secret_view=(EditText)findViewById(R.id.app_secret_text);
dropbox = (Button)findViewById(R.id.link_dropbox);
//////////////////////////////////////////////////////////////
dropbox.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
APP_kEY = app_key_view.getText().toString();
APP_SECRET = App_secret_view.getText().toString();
AppKeyPair appKeys = new AppKeyPair(APP_kEY,APP_SECRET);
AndroidAuthSession session = new AndroidAuthSession(appKeys);
mDBApi = new DropboxAPI<>(session);
mDBApi.getSession().startOAuth2Authentication(login_activity.this);
}
});
}
#Override
protected void onResume () {
super.onResume();
if(mDBApi.getSession().authenticationSuccessful()){
try {
mDBApi.getSession().finishAuthentication();
accessToken = mDBApi.getSession().getOAuth2AccessToken();
SharedPreferences.Editor editor = getSharedPreferences("login",MODE_PRIVATE).edit();
editor.putString("appkey",APP_kEY);
editor.putString("appsecret",APP_SECRET);
editor.putString("access",accessToken);
editor.commit();
Intent i = new Intent(login_activity.this,MainActivity.class);
startActivity(i);
finish();
}
catch (IllegalStateException e){
Log.i("DbAuthLog", "Error authenticationg", e);
}
}
}
Logcat
09-11 21:06:01.947 3842-3842/? I/art﹕ Late-enabling -Xcheck:jni
09-11 21:06:01.975 3842-3851/? I/art﹕ Debugger is no longer active
09-11 21:06:02.370 3842-3857/? I/art﹕ Background sticky concurrent mark sweep GC freed 2909(253KB) AllocSpace objects, 2(32KB) LOS objects, 0% free, 50MB/50MB, paused 36.891ms total 133.660ms
09-11 21:06:02.803 3842-3842/? D/AndroidRuntime﹕ Shutting down VM
09-11 21:06:02.803 3842-3842/? E/AndroidRuntime﹕ FATAL EXCEPTION: main
Process: com.example.ayzaz.timescopev1.timescope, PID: 3842
java.lang.RuntimeException: Unable to resume activity {com.example.ayzaz.timescopev1.timescope/com.example.ayzaz.timescopev1.timescope.login_activity}: java.lang.NullPointerException: Attempt to invoke virtual method 'com.dropbox.client2.session.Session com.dropbox.client2.DropboxAPI.getSession()' on a null object reference
at android.app.ActivityThread.performResumeActivity(ActivityThread.java:2986)
at android.app.ActivityThread.handleResumeActivity(ActivityThread.java:3017)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2392)
at android.app.ActivityThread.access$800(ActivityThread.java:151)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1303)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5254)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:903)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:698)
Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'com.dropbox.client2.session.Session com.dropbox.client2.DropboxAPI.getSession()' on a null object reference
at com.example.ayzaz.timescopev1.timescope.login_activity.onResume(login_activity.java:77)
at android.app.Instrumentation.callActivityOnResume(Instrumentation.java:1257)
at android.app.Activity.performResume(Activity.java:6076)
at android.app.ActivityThread.performResumeActivity(ActivityThread.java:2975)
            at android.app.ActivityThread.handleResumeActivity(ActivityThread.java:3017)
            at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2392)
            at android.app.ActivityThread.access$800(ActivityThread.java:151)
            at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1303)
            at android.os.Handler.dispatchMessage(Handler.java:102)
            at android.os.Looper.loop(Looper.java:135)
            at android.app.ActivityThread.main(ActivityThread.java:5254)
            at java.lang.reflect.Method.invoke(Native Method)
            at java.lang.reflect.Method.invoke(Method.java:372)
            at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:903)
            at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:698)
09-11 21:06:05.849 3842-3842/com.example.ayzaz.timescopev1.timescope I/Process﹕ Sending signal. PID: 3842 SIG: 9
onResume() always gets called after onCreate().
When onResume() begins, mDBApi is null, because this field is only ever assigned in the onClick() method.
You either need to assign mDBApi in onCreate() directly, or you need to check that it is not null before you try to use it.

Cannot update text in EditText inside onActivityResult

I am trying to use Voice Recognition on Android. Following is my code.
This is the code of the Button that is responsible to start speech recognition.
speak.setOnClickListener(new OnClickListener(){
#Override
public void onClick(View v)
{
Intent intent = new Intent(RecognizerIntent.ACTION_RECOGNIZE_SPEECH);
intent.putExtra(RecognizerIntent.EXTRA_LANGUAGE_MODEL,RecognizerIntent.LANGUAGE_MODEL_FREE_FORM);
intent.putExtra(RecognizerIntent.EXTRA_PROMPT, "City Name Please?");
startActivityForResult(intent, REQUEST_CODE);
}});
Here is a onActivityResult method.
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
if (requestCode == REQUEST_CODE && resultCode == RESULT_OK) {
ArrayList<String> matches_Text = data.getStringArrayListExtra(RecognizerIntent.EXTRA_RESULTS);
Log.v("Results", matches_Text.get(0).toString());
//Update EditText cityname here
String normalized_cityname = matches_Text.get(0).toString().trim();
normalized_cityname = normalized_cityname.replace(" ","%20");
try {
getResponseString("http://api.openweathermap.org/data/2.5/weather?q="+normalized_cityname+"&units=metric", true);
} catch (IOException e) {
e.printStackTrace();
} catch (JSONException e) {
e.printStackTrace();
}
}
}
The code worked ok but there are two problems I am encountering now and I am afraid that they may be related.
If I try to update text in an EditText instance cityname using cityname.setText(matches_Text.get(0).toString()), it crashes the app.
If I hit the speak button now, the google voice dialog comes up but shows can't reacg google at the moment.
Please suggest what can I do?
Adding the getResponseString method also.
public void getResponseString(String Url, boolean IsCalledOnVoiceInput) throws IOException, JSONException {
String temperature="";
String city;
String country;
String weather_main, weather_description;
MyAsyncTask xxx = new MyAsyncTask();
try {
String responseString = xxx.execute(Url).get();
TextView txtTemp = (TextView)findViewById(R.id.txt_temp);
TextView txtCity = (TextView)findViewById(R.id.txt_CityName);
TextView txtWeatherMain = (TextView)findViewById(R.id.textView2);
TextView txtWeatherDescription = (TextView)findViewById(R.id.textView3);
JSONObject reader = new JSONObject(responseString);
JSONObject main = reader.getJSONObject("main");
temperature = main.getString("temp");
Log.v("temperarure",temperature);
city = reader.getString("name");
Log.v("city",city);
JSONObject sys = reader.getJSONObject("sys");
country = sys.getString("country");
Log.v("country",country);
JSONArray weather = reader.getJSONArray("weather");
JSONObject weather_obj = weather.getJSONObject(0);
weather_main = weather_obj.getString("main");
weather_description = weather_obj.getString("description");
txtTemp.setText(temperature+" °C");
txtCity.setText(city+" ("+country+")");
txtWeatherMain.setText(weather_main);
txtWeatherDescription.setText(weather_description);
if(IsCalledOnVoiceInput)
Speak_Weather_Data(city,temperature,weather_main,weather_description);
} catch (InterruptedException e) {
e.printStackTrace();
} catch (ExecutionException e) {
e.printStackTrace();
} catch (JSONException e){
e.printStackTrace();
}
}
Here is the log output
12-24 13:36:06.050 12164-12164/samarth.learning.http D/dalvikvm﹕ Late-enabling CheckJNI
12-24 13:36:06.300 12164-12164/samarth.learning.http D/Network﹕ Network
12-24 13:36:06.300 12164-12164/samarth.learning.http V/Lat﹕ 28.8331443
12-24 13:36:06.300 12164-12164/samarth.learning.http V/Long﹕ 78.7717138
12-24 13:36:06.360 12164-12164/samarth.learning.http D/libEGL﹕ loaded /vendor/lib/egl/libEGL_adreno.so
12-24 13:36:06.370 12164-12164/samarth.learning.http D/libEGL﹕ loaded /vendor/lib/egl/libGLESv1_CM_adreno.so
12-24 13:36:06.380 12164-12164/samarth.learning.http D/libEGL﹕ loaded /vendor/lib/egl/libGLESv2_adreno.so
12-24 13:36:06.380 12164-12164/samarth.learning.http I/Adreno-EGL﹕ <qeglDrvAPI_eglInitialize:316>: EGL 1.4 QUALCOMM build: (CL4169980)
OpenGL ES Shader Compiler Version: 17.01.10.SPL
Build Date: 11/04/13 Mon
Local Branch:
Remote Branch:
Local Patches:
Reconstruct Branch:
12-24 13:36:06.430 12164-12164/samarth.learning.http D/OpenGLRenderer﹕ Enabling debug mode 0
12-24 13:36:06.531 12164-12164/samarth.learning.http E/SpannableStringBuilder﹕ SPAN_EXCLUSIVE_EXCLUSIVE spans cannot have a zero length
12-24 13:36:06.531 12164-12164/samarth.learning.http E/SpannableStringBuilder﹕ SPAN_EXCLUSIVE_EXCLUSIVE spans cannot have a zero length
12-24 13:36:08.232 12164-12164/samarth.learning.http W/IInputConnectionWrapper﹕ showStatusIcon on inactive InputConnection
12-24 13:36:18.844 12164-12164/samarth.learning.http V/Results﹕ new delhi
12-24 13:36:18.844 12164-12164/samarth.learning.http D/AndroidRuntime﹕ Shutting down VM
12-24 13:36:18.844 12164-12164/samarth.learning.http W/dalvikvm﹕ threadid=1: thread exiting with uncaught exception (group=0x4157c8b0)
12-24 13:36:18.854 12164-12164/samarth.learning.http E/AndroidRuntime﹕ FATAL EXCEPTION: main
java.lang.RuntimeException: Failure delivering result ResultInfo{who=null, request=1234, result=-1, data=Intent { (has extras) }} to activity {samarth.learning.http/samarth.learning.http.MainActivity}: java.lang.NullPointerException
at android.app.ActivityThread.deliverResults(ActivityThread.java:3462)
at android.app.ActivityThread.handleSendResult(ActivityThread.java:3505)
at android.app.ActivityThread.access$1100(ActivityThread.java:150)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1346)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:213)
at android.app.ActivityThread.main(ActivityThread.java:5225)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:525)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:741)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:557)
at dalvik.system.NativeStart.main(Native Method)
Caused by: java.lang.NullPointerException
at samarth.learning.http.MainActivity.onActivityResult(MainActivity.java:160)
at android.app.Activity.dispatchActivityResult(Activity.java:5322)
at android.app.ActivityThread.deliverResults(ActivityThread.java:3458)
            at android.app.ActivityThread.handleSendResult(ActivityThread.java:3505)
            at android.app.ActivityThread.access$1100(ActivityThread.java:150)
            at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1346)
            at android.os.Handler.dispatchMessage(Handler.java:99)
            at android.os.Looper.loop(Looper.java:213)
            at android.app.ActivityThread.main(ActivityThread.java:5225)
            at java.lang.reflect.Method.invokeNative(Native Method)
            at java.lang.reflect.Method.invoke(Method.java:525)
            at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:741)
            at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:557)
            at dalvik.system.NativeStart.main(Native Method)
12-24 13:36:22.558 12164-12164/samarth.learning.http I/Process﹕ Sending signal. PID: 12164 SIG: 9
is this what you mean?
i think matches_Text is sometimes NULL?! how about adding an
if(matches_Text == null){
Log.v("Results","matches_Text is NULL!");
return;
}
add above code just after ArrayList<String> matches_Text = da...

NullPointerException in savedInstanceState Bundle

I am getting a NullPointerException when my code tries to access the value in a key/value pair created by onSaveInstanceState method of Activity class.
I set break points and I know for fact my Bundle is not null and it contains references to my key/values. I dont understand why I am getting this runtime error. Here are my codes for onSaveInstanceState
#Override
protected void onSaveInstanceState(Bundle outState) {
int mPoints = winCount;
int hPoints = loseCount;
String reTextView = resultsTextView.getText().toString();
String pTextView = pointsTextView.getText().toString();
String roTextView = rollTextView.getText().toString();
outState.putInt("MY_POINTS", mPoints);
outState.putInt("HOUSE_POINTS", hPoints);
outState.putString("RESULTS", reTextView);
outState.putString("POINTS", pTextView);
outState.putString("ROLL", roTextView);
super.onSaveInstanceState(outState);
}
and here is my code to restore the state on the onCreate method
// check if app just started or is being restored from memory
if ( savedInstanceState == null ) // the app just started running
{
winCount = 0;
loseCount = 0;
}
else
{
winCount = savedInstanceState.getInt("MY_POINTS");
loseCount = savedInstanceState.getInt("HOUSE_POINTS");
resultsTextView.setText(String.valueOf(savedInstanceState.getString("RESULTS")));
pointsTextView.setText(String.valueOf(savedInstanceState.getString("POINTS")));
rollTextView.setText(String.valueOf(savedInstanceState.getString("ROLL")));
}
I get the runtime error on line that starts with resultsTextView.setText... and here is contents of the savedInstanceState Bundle retrieved from break points in debug mode
Bundle[{RESULTS=Roll Again, MY_POINTS=2, POINTS=Your Point is 8,
HOUSE_POINTS=2,
android:viewHierarchyState=Bundle[{android:Panels=android.util.SparseArray#421c5560,
android:views=android.util.SparseArray#421c5358,
android:ActionBar=android.util.SparseArray#421c57f8}], ROLL=You Rolled
Easy Four}]
as you can see all my strings have a value, the interesting thing is that I dont get the NullPointerException runtime error on int variables (winCount and loseCount) but I am getting it at string values. I appreciate any help.
Update: here is the whole error log from log cat, I have resultsTextView.setText... at line 68 (within the else block on onCreat())
W/dalvikvm(27797): threadid=1: thread exiting with uncaught exception (group=0x418b6700)
E/AndroidRuntime(27797): FATAL EXCEPTION: main
E/AndroidRuntime(27797): java.lang.RuntimeException: Unable to start activity ComponentInfo{…}: java.lang.NullPointerException
E/AndroidRuntime(27797): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2211)
E/AndroidRuntime(27797): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2261)
E/AndroidRuntime(27797): at android.app.ActivityThread.handleRelaunchActivity(ActivityThread.java:3740)
E/AndroidRuntime(27797): at android.app.ActivityThread.access$700(ActivityThread.java:141)
E/AndroidRuntime(27797): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1262)
E/AndroidRuntime(27797): at android.os.Handler.dispatchMessage(Handler.java:99)
E/AndroidRuntime(27797): at android.os.Looper.loop(Looper.java:137)
E/AndroidRuntime(27797): at android.app.ActivityThread.main(ActivityThread.java:5103)
E/AndroidRuntime(27797): at java.lang.reflect.Method.invokeNative(Native Method)
E/AndroidRuntime(27797): at java.lang.reflect.Method.invoke(Method.java:525)
E/AndroidRuntime(27797): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:737)
E/AndroidRuntime(27797): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
E/AndroidRuntime(27797): at dalvik.system.NativeStart.main(Native Method)
E/AndroidRuntime(27797): Caused by: java.lang.NullPointerException
E/AndroidRuntime(27797): at app.package.onCreate(AppName.java:68)
E/AndroidRuntime(27797): at android.app.Activity.performCreate(Activity.java:5133)
E/AndroidRuntime(27797): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1087)
E/AndroidRuntime(27797): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2175)
E/AndroidRuntime(27797): ... 12 more
here is my whole onCreate method, since many commentators requested to see the whole method. Hope it helps!
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity);
// check if app just started or is being restored from memory
if ( savedInstanceState == null ) // the app just started running
{
winCount = 0;
loseCount = 0;
}
else
{
winCount = savedInstanceState.getInt("MY_POINTS");
loseCount = savedInstanceState.getInt("HOUSE_POINTS");
resultsTextView.setText(savedInstanceState.getString("RESULTS"));
pointsTextView.setText(savedInstanceState.getString("POINTS"));
rollTextView.setText(savedInstanceState.getString("ROLL"));
}
die1 = (ImageView) findViewById(R.id.imageView1);
die2 = (ImageView) findViewById(R.id.imageView2);
dealButton = (Button) findViewById(R.id.dealButton);
resetButton = (Button) findViewById(R.id.resetButton);
resultsTextView = (TextView) findViewById(R.id.resultsTextView);
myPointsTextView = (TextView) findViewById(R.id.myPointstTextView);
housePointsTextView = (TextView) findViewById(R.id.housePointsTextView);
pointsTextView = (TextView) findViewById(R.id.pointsTextView1);
rollTextView = (TextView) findViewById(R.id.rollTextView);
dealButton.setOnClickListener(dealButtonListener);
resetButton.setOnClickListener(resetButtonLinstener);
//on shake event
mSensorManager = (SensorManager) getSystemService(SENSOR_SERVICE);
mAccelerometer = mSensorManager.getDefaultSensor(Sensor.TYPE_ACCELEROMETER);
mShakeDetector = new ShakeDetector(new OnShakeListener() {
#Override
public void onShake() {
game(rollDice());
}
});
resultsTextView.setTextColor(Color.BLACK);
myPointsTextView.setText(String.format("%s", winCount));
housePointsTextView.setText(String.format("%s", loseCount));
}
You should initialize your TextViews before calling setText method. So onCreate should be like this:
setContentView(R.layout.activity);
die1 = (ImageView) findViewById(R.id.imageView1);
die2 = (ImageView) findViewById(R.id.imageView2);
dealButton = (Button) findViewById(R.id.dealButton);
resetButton = (Button) findViewById(R.id.resetButton);
resultsTextView = (TextView) findViewById(R.id.resultsTextView);
myPointsTextView = (TextView) findViewById(R.id.myPointstTextView);
housePointsTextView = (TextView) findViewById(R.id.housePointsTextView);
pointsTextView = (TextView) findViewById(R.id.pointsTextView1);
rollTextView = (TextView) findViewById(R.id.rollTextView);
// check if app just started or is being restored from memory
if ( savedInstanceState == null ) // the app just started running
{
winCount = 0;
loseCount = 0;
}
else
{
winCount = savedInstanceState.getInt("MY_POINTS");
loseCount = savedInstanceState.getInt("HOUSE_POINTS");
resultsTextView.setText(savedInstanceState.getString("RESULTS"));
pointsTextView.setText(savedInstanceState.getString("POINTS"));
rollTextView.setText(savedInstanceState.getString("ROLL"));
}
...

Unable to start activity ComponentInfo; trying to create splash screen

I recently added a splash screen to my Android application to mask the loading of a JSON file, but my app crashes after finishing parsing. I've commented out and uncommented out code until I found the problematic segment, but I'm not sure why it isn't working.
The code works if I comment out the for loop from this code segment.
From MagazinePagesActivity.java:
public void loadItems() {
for (Item item : SplashActivity.downloadedItems) {
Post post = (Post) item;
for (String tag : post.tags) {
if (tag.equals(this.tag)) {
// loader.loadImage(magazine.imageURL, new
// SimpleImageLoadingListener());
Bundle bundle = new Bundle();
bundle.putString("title", post.title);
bundle.putString("article", post.article);
bundle.putString("imageURL", post.imageURL);
MagazineFragment cover = new MagazineFragment();
cover.setArguments(bundle);
coverAdapter.addNewItem(cover);
}
}
}
setContentView(vp);
}
At first, I thought it was because SplashActivity.downloadedItems wasn't properly defined, but it looks fine to me:
From SplashActivity.java:
public static ArrayList<Item> downloadedItems = new ArrayList<Item>();
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_splash);
new RetreiveJSONTask() {
protected void onPostExecute(String JSON)
{
Log.d("SplashActivity", "Beginning parsingJSON" );
downloadedItems = parseJSON ( JSON );
Log.d("SplashActivity", "Finished parsingJSON" );
Log.d("SplashActivity", "" + SplashActivity.downloadedItems.isEmpty());
Intent i = new Intent(SplashActivity.this, MagazinePagesActivity.class);
startActivity(i);
// Closes the splash screen
finish();
}
}.execute(sourceURL());
}
From LogCat:
10-16 19:23:12.602: D/AndroidRuntime(828): Shutting down VM
10-16 19:23:12.602: W/dalvikvm(828): threadid=1: thread exiting with uncaught exception (group=0x41465700)
10-16 19:23:12.632: E/AndroidRuntime(828): FATAL EXCEPTION: main
10-16 19:23:12.632: E/AndroidRuntime(828): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.bruinfootball/com.dailybruin.bruinframework.channels.StoryListActivity}: java.lang.NullPointerException
10-16 19:23:12.632: E/AndroidRuntime(828): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2211)
10-16 19:23:12.632: E/AndroidRuntime(828): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2261)
10-16 19:23:12.632: E/AndroidRuntime(828): at android.app.ActivityThread.access$600(ActivityThread.java:141)
10-16 19:23:12.632: E/AndroidRuntime(828): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1256)
10-16 19:23:12.632: E/AndroidRuntime(828): at android.os.Handler.dispatchMessage(Handler.java:99)
10-16 19:23:12.632: E/AndroidRuntime(828): at android.os.Looper.loop(Looper.java:137)
10-16 19:23:12.632: E/AndroidRuntime(828): at android.app.ActivityThread.main(ActivityThread.java:5103)
10-16 19:23:12.632: E/AndroidRuntime(828): at java.lang.reflect.Method.invokeNative(Native Method)
10-16 19:23:12.632: E/AndroidRuntime(828): at java.lang.reflect.Method.invoke(Method.java:525)
10-16 19:23:12.632: E/AndroidRuntime(828): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:737)
10-16 19:23:12.632: E/AndroidRuntime(828): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
10-16 19:23:12.632: E/AndroidRuntime(828): at dalvik.system.NativeStart.main(Native Method)
10-16 19:23:12.632: E/AndroidRuntime(828): Caused by: java.lang.NullPointerException
10-16 19:23:12.632: E/AndroidRuntime(828): at com.dailybruin.bruinframework.channels.StoryListActivity.loadItems(StoryListActivity.java:27)
10-16 19:23:12.632: E/AndroidRuntime(828): at com.dailybruin.bruinframework.channels.JSONItemsActivity.onCreate(JSONItemsActivity.java:20)
10-16 19:23:12.632: E/AndroidRuntime(828): at com.dailybruin.bruinframework.channels.StoryItemsActivity.onCreate(StoryItemsActivity.java:18)
10-16 19:23:12.632: E/AndroidRuntime(828): at com.dailybruin.bruinframework.channels.StoryListActivity.onCreate(StoryListActivity.java:18)
10-16 19:23:12.632: E/AndroidRuntime(828): at android.app.Activity.performCreate(Activity.java:5133)
10-16 19:23:12.632: E/AndroidRuntime(828): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1087)
10-16 19:23:12.632: E/AndroidRuntime(828): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2175)
10-16 19:23:12.632: E/AndroidRuntime(828): ... 11 more
Not sure if it helps, but both SplashActivity and MagazinePagesActivity extend JSONItemsActivity, separately.
Thanks in advance for any help! I'm fairly new to Android, so please bear with me.
Edit: That's odd, the debug statement I put to check if the ArrayList is empty returns true, but another debug statement within parseJSON shows that things are being added. My parseJSON method:
public ArrayList<Item> parseJSON(String jsonString) {
ArrayList<Item> magazines = new ArrayList<Item>();
JSONArray jArray;
try {
jArray = new JSONArray(jsonString);
JSONObject jObject;
JSONObject image;
String img;
String title;
String subtitle;
int commentCount;
String content;
String date;
String ID;
String slug;
JSONArray array;
String[] tags;
for (int i = 0; i < jArray.length(); i++) {
jObject = jArray.getJSONObject(i);
img = jObject.getString("tall_image_url");
if (img.equals(""))
img = jObject.getString("image_url");
if (img.equals("") && !jObject.isNull("poster_image")) {
image = jObject.getJSONObject("poster_image");
img = image.getString("name");
}
title = jObject.getString("title");
subtitle = jObject.getString("subtitle");
commentCount = jObject.getInt("comment_count");
content = jObject.getString("content_html");
date = jObject.getString("creation_date");
ID = jObject.getString("id");
slug = jObject.getString("slug");
array = jObject.getJSONArray("tags_list");
tags = new String[array.length()];
for (int j = 0; j < array.length(); j++) {
tags[j] = array.getString(j);
}
for (String tag : tags) {
if (tag.equals(this.tag))
{
Post additive = new Post(img, title, subtitle,
commentCount, content, date, ID, slug, tags);
magazines.add(additive);
Log.d("SplashActivity", additive.toString());
}
}
}
} catch (JSONException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return magazines;
}
StoryListActivity line 27:
public void loadItems() {
(findViewById(R.id.progress_bar)).setVisibility(View.GONE);
getSupportFragmentManager().beginTransaction()
.replace(R.id.loading, new StoryListFragment()).commit();
}
StoryItemsActivity (MagazinePagesActivity and StoryListActivity extend this class; this class extends JSONItemsActivity, which SplashActivity also extends):
package com.dailybruin.bruinframework.channels;
import java.util.ArrayList;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import com.dailybruin.bruinframework.R;
import com.dailybruin.bruinframework.base.BaseActivity;
import com.dailybruin.bruinframework.base.URLBuilder;
import android.os.Bundle;
public abstract class StoryItemsActivity extends JSONItemsActivity {
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
}
public String sourceURL()
{
return URLBuilder.getPostsURL(getString(R.string.slug));
}
public ArrayList<Item> parseJSON(String jsonString) {
// Using pre-downloaded and parsed JSON
return SplashActivity.downloadedItems;
}
}
Check this part of the code. Line number 27. That is null and hence causing NPE.
Caused by: java.lang.NullPointerException
10-16 19:23:12.632: E/AndroidRuntime(828): at com.dailybruin.bruinframework.channels.StoryListActivity.loadItems(StoryListActivity.java:27)

Use My location Latitude Longitude and DB Latitude Longitude Calculation Distance

Use My location Latitude Longitude and DB Latitude Longitude Calculation Distance.but always error "The application AndroidGoogleMaps(process com.androidhive.googlemaps)has stopped unexpectedly.Please try again."
public class AndroidGoogleMapsActivity extends MapActivity {
public int mm[][]= new int[100][100];
double[][] rtdist= new double[50][2];
double[][] okdist= new double[50][2];
public GeoPoint[] endpp = new GeoPoint[100];
private static String KEY_SUCCESS = "success";
private MyLocationOverlay mylayer;
private MapController mapController;
private MapView mapView;
protected GeoPoint geoPoint;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
findViews();
setupMap();
}
private void findViews() {
mapView = (MapView) findViewById(R.id.mapView);
mapController = mapView.getController();
mapView.setBuiltInZoomControls(true);
}
private void setupMap() {
List<Overlay> overlays = mapView.getOverlays();
mylayer = new MyLocationOverlay(this, mapView);
mylayer.runOnFirstFix(new Runnable() {
public void run() {
// Zoom in to current location
mapView.setTraffic(true);
mapController.setZoom(17);
mapController.animateTo(mylayer.getMyLocation());
}
});
overlays.add(mylayer);
GeoPoint startpp = mylayer.getMyLocation();
String b="SELECT lat,lng FROM markers";
UserFunctions userFunction = new UserFunctions();
JSONObject json = userFunction.execqlcmd(b);
try {
if (json.getString(KEY_SUCCESS) != null)
{
String res = json.getString(KEY_SUCCESS);
if(Integer.parseInt(res) == 1)
{
for(int i=0 ; i<100 ; i++) {
JSONObject json_row = json.getJSONObject("r"+i);
mm[i][0]=(int)(Double.parseDouble(json_row.getString("c0")) * 1E6) ;
mm[i][1]=(int)(Double.parseDouble(json_row.getString("c1")) * 1E6) ;
endpp[i] =new GeoPoint(mm[i][0], mm[i][1] );
MapController mc = mapView.getController();
DistanceCalculator caldist= new DistanceCalculator(6371);
for(int j = 0; j < 2; j++)
{
rtdist[j][0]=1;
rtdist[j][1]=caldist.CalculationByDistance(startpp, endpp[j]);
//startpp The location of the phone is
//endpp DB's lat lng
//To judge the results of this array is in line with the distance required by the user
if(rtdist[j][1]<=50)
{
okdist[j][0]=rtdist[j][0]; //The amount of store
okdist[j][0]=rtdist[j][1]; //Store the distance
}
}
mc.animateTo(geoPoint);
mc.setZoom(15);
mapView.invalidate();
List<Overlay> mapOverlays = mapView.getOverlays();
Drawable drawable = this.getResources().getDrawable(R.drawable.mark_red);
AddItemizedOverlay itemizedOverlay =
new AddItemizedOverlay(drawable, this);
OverlayItem overlayitem = new OverlayItem(geoPoint, "Hello", "Sample Overlay item");
itemizedOverlay.addOverlay(overlayitem);
mapOverlays.add(itemizedOverlay);
}}}}
catch (JSONException e) {
e.printStackTrace();
}
}
#Override
protected void onResume() {
// TODO Auto-generated method stub
super.onResume();
mylayer.enableMyLocation();
}
#Override
protected void onPause() {
// TODO Auto-generated method stub
super.onPause();
mylayer.disableMyLocation();
}
#Override
protected boolean isRouteDisplayed() {
return false;
}
public class DistanceCalculator {
private double Radius;
// R = earth's radius (mean radius = 6,371km)
// Constructor
DistanceCalculator(double R) {
Radius = R;
}
public double CalculationByDistance(GeoPoint startpp, GeoPoint endpp) {
double lat1 = startpp.getLatitudeE6()/1E6;
double lat2 = endpp.getLatitudeE6()/1E6;
double lon1 = startpp.getLongitudeE6()/1E6;
double lon2 = endpp.getLongitudeE6()/1E6;
double dLat = Math.toRadians(lat2-lat1);
double dLon = Math.toRadians(lon2-lon1);
double a = Math.sin(dLat/2) * Math.sin(dLat/2) +
Math.cos(Math.toRadians(lat1)) * Math.cos(Math.toRadians(lat2)) *
Math.sin(dLon/2) * Math.sin(dLon/2);
double c = 2 * Math.asin(Math.sqrt(a));
return Radius * c;
}
}
}
LogCat :
05-13 14:49:44.703: D/dalvikvm(303): GC_FOR_MALLOC freed 4358 objects / 275032 bytes in 316ms
05-13 14:49:44.903: D/dalvikvm(303): GC_FOR_MALLOC freed 10567 objects / 641664 bytes in 58ms
05-13 14:49:45.063: D/dalvikvm(303): GC_FOR_MALLOC freed 4727 objects / 310440 bytes in 45ms
05-13 14:49:45.243: D/dalvikvm(303): GC_FOR_MALLOC freed 6480 objects / 394584 bytes in 48ms
05-13 14:49:45.443: D/dalvikvm(303): GC_FOR_MALLOC freed 7949 objects / 616640 bytes in 51ms
05-13 14:49:45.623: D/dalvikvm(303): GC_FOR_MALLOC freed 6072 objects / 370040 bytes in 51ms
05-13 14:49:45.813: D/dalvikvm(303): GC_FOR_MALLOC freed 4449 objects / 354128 bytes in 62ms
05-13 14:49:45.823: I/dalvikvm-heap(303): Grow heap (frag case) to 3.048MB for 87396-byte allocation
05-13 14:49:45.884: D/dalvikvm(303): GC_FOR_MALLOC freed 45 objects / 2392 bytes in 66ms
05-13 14:49:45.953: D/dalvikvm(303): GC_FOR_MALLOC freed 2 objects / 80 bytes in 67ms
05-13 14:49:45.953: I/dalvikvm-heap(303): Grow heap (frag case) to 3.129MB for 87396-byte allocation
05-13 14:49:46.013: D/dalvikvm(303): GC_FOR_MALLOC freed 0 objects / 0 bytes in 58ms
05-13 14:49:46.273: E/JSON(303): {"tag":"exesqlcmd","success":1,"error":0,"rownum":2,"colnum":2,"r0":{"c0":"23.973728","c1":"121.583641"},"r1":{"c0":"23.973827","c1":"121.585625"}}
05-13 14:49:46.293: D/AndroidRuntime(303): Shutting down VM
05-13 14:49:46.293: W/dalvikvm(303): threadid=1: thread exiting with uncaught exception (group=0x4001d800)
05-13 14:49:46.313: E/AndroidRuntime(303): FATAL EXCEPTION: main
05-13 14:49:46.313: E/AndroidRuntime(303): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.androidhive.googlemaps/com.androidhive.googlemaps.AndroidGoogleMapsActivity}: java.lang.NullPointerException
05-13 14:49:46.313: E/AndroidRuntime(303): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2663)
05-13 14:49:46.313: E/AndroidRuntime(303): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2679)
05-13 14:49:46.313: E/AndroidRuntime(303): at android.app.ActivityThread.access$2300(ActivityThread.java:125)
05-13 14:49:46.313: E/AndroidRuntime(303): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2033)
05-13 14:49:46.313: E/AndroidRuntime(303): at android.os.Handler.dispatchMessage(Handler.java:99)
05-13 14:49:46.313: E/AndroidRuntime(303): at android.os.Looper.loop(Looper.java:123)
05-13 14:49:46.313: E/AndroidRuntime(303): at android.app.ActivityThread.main(ActivityThread.java:4627)
05-13 14:49:46.313: E/AndroidRuntime(303): at java.lang.reflect.Method.invokeNative(Native Method)
05-13 14:49:46.313: E/AndroidRuntime(303): at java.lang.reflect.Method.invoke(Method.java:521)
05-13 14:49:46.313: E/AndroidRuntime(303): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
05-13 14:49:46.313: E/AndroidRuntime(303): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
05-13 14:49:46.313: E/AndroidRuntime(303): at dalvik.system.NativeStart.main(Native Method)
05-13 14:49:46.313: E/AndroidRuntime(303): Caused by: java.lang.NullPointerException
05-13 14:49:46.313: E/AndroidRuntime(303): at com.androidhive.googlemaps.AndroidGoogleMapsActivity$DistanceCalculator.CalculationByDistance(AndroidGoogleMapsActivity.java:178)
05-13 14:49:46.313: E/AndroidRuntime(303): at com.androidhive.googlemaps.AndroidGoogleMapsActivity.setupMap(AndroidGoogleMapsActivity.java:106)
05-13 14:49:46.313: E/AndroidRuntime(303): at com.androidhive.googlemaps.AndroidGoogleMapsActivity.onCreate(AndroidGoogleMapsActivity.java:41)
05-13 14:49:46.313: E/AndroidRuntime(303): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
05-13 14:49:46.313: E/AndroidRuntime(303): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2627)
05-13 14:49:46.313: E/AndroidRuntime(303): ... 11 more
if you want to calculate distance between two geographic point you have to see those two methods in the Location Class
Location Class
you can use it like this:
Location locationA = new Location("point A");
locationA.setLatitude(latA);
locationA.setLongitude(lngA);
Location locationB = new Location("point B");
locationB.setLatitude(latB);
LocationB.setLongitude(lngB);
distance = locationA.distanceTo(locationB);

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