I am trying to create an application that reads an NFC tag and checks the tag against strings in a string array and then sets the text on another activity. I have got it working so that it checks if the string exists and sets the text in the new activity, but I want to be able to specify which string I want it to check against within the array, because there will be multiple strings in the NFC tag that I want to then display in the new activity. I have tried this for it:
result == getResources().getString(R.string.test_dd)
Here is the relevant code:
String[] dd;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
dd = getResources().getStringArray(R.array.device_description);
}
#Override
protected void onPostExecute(String result) {
if (result != null) {
if(doesArrayContain(dd, result)) {
Vibrator v = (Vibrator)getSystemService(Context.VIBRATOR_SERVICE);
v.vibrate(800);
Intent newIntent = new Intent(getApplicationContext(), TabsTest.class);
Bundle bundle1 = new Bundle();
bundle1.putString("key", result);
newIntent.putExtras(bundle1);
startActivity(newIntent);
Toast.makeText(getApplicationContext(), "NFC tag written successfully!", Toast.LENGTH_SHORT).show();
}
else{
Toast.makeText(getApplicationContext(), result + " is not in the device description!", Toast.LENGTH_SHORT).show();
}
}
}
EDIT:
Here is the method used and please can anyone help me with this problem:
public static boolean doesArrayContain(String[] array, String text) {
for (String element : array) {
if(element != null && element.equalsIgnoreCase(text)) {
return true;
}
}
return false;
}
For comparing equality of strings (and other objects) use the equals() method. == compares identity of objects (same string object).
Here is the solution that I found:
Create a new method:
public static boolean stringCaseInsensitive(String string, String result) {
if(string != null && string.equalsIgnoreCase(result)) {
return true;
}
return false;
}
And call it in like this:
if(stringCaseInsensitive(getResources().getString(R.string.test_dd), result))
{
Intent newIntent = new Intent(getApplicationContext(), TabsTest.class);
Bundle bundle1 = new Bundle();
bundle1.putString("key", result);
newIntent.putExtras(bundle1);
startActivity(newIntent);
Toast.makeText(getApplicationContext(), "NFC tag written successfully!", Toast.LENGTH_SHORT).show();
}
else{
}
Related
I wrote a custom plugin to read blocks of data from an NfcA(i.e.non-ndef) tag. It seems to work fine , but only after the second scan. I am using Activity intent to derive the "NfcAdapter.EXTRA_TAG" to later use it for reading the values. I am also updating the Intents in onNewIntent(). OnNewIntent gets called after the second scan and after that I get result all the time.But in the first scan onNewIntent does not gets called, hence I end up using the Activity tag that does not have "NfcAdapter.EXTRA_TAG", hence I get null. Please see the my code below.
SE_NfcA.java(my native code for plugin)
#Override
public boolean execute(String action, JSONArray args, CallbackContext callbackContext) throws JSONException {
String Result = "";
String TypeOfTalking = "";
if (action.contains("TalkToNFC"))
{
JSONObject arg_object = args.getJSONObject(0);
TypeOfTalking = arg_object.getString("type");
if(TypeOfTalking != "")
{
if (TypeOfTalking.contains("readBlock"))
{
if(TypeOfTalking.contains("#"))
{
try
{
String[] parts = TypeOfTalking.split("#");
int index = Integer.parseInt(parts[1]);
Result = Readblock(cordova.getActivity().getIntent(),(byte)index);
callbackContext.success(Result);
}
catch(Exception e)
{
callbackContext.error("Exception Reading "+ TypeOfTalking + "due to "+ e.toString());
return false;
}
}
}
else
{
return false;
}
}
else
{
return false;
}
}
else
{
return false;
}
return true;
}
#Override
public void onNewIntent(Intent intent) {
ShowAlert("onNewIntent called");
Tag tagFromIntent = intent.getParcelableExtra(NfcAdapter.EXTRA_TAG);
super.onNewIntent(intent);
getActivity().setIntent(intent);
savedTag = tagFromIntent;
savedIntent = intent;
}
#Override
public void onPause(boolean multitasking) {
Log.d(TAG, "onPause " + getActivity().getIntent());
super.onPause(multitasking);
if (multitasking) {
// nfc can't run in background
stopNfc();
}
}
#Override
public void onResume(boolean multitasking) {
Log.d(TAG, "onResume " + getActivity().getIntent());
super.onResume(multitasking);
startNfc();
}
public String Readblock(Intent Intent,byte block) throws IOException{
byte[] response = new byte[]{};
if(Intent != null)
{
Tag myTag = Intent.getParcelableExtra(NfcAdapter.EXTRA_TAG);
if(savedTag != null)
myTag = savedTag;
if(myTag != null)
{
try{
Reader nTagReader = new Reader(myTag);
nTagReader.close();
nTagReader.connect();
nTagReader.SectorSelect(Sector.Sector0);
response = nTagReader.fast_read(block, block);
nTagReader.close();
return ConvertH(response);
}catch(Exception e){
ShowAlert(e.toString());
}
}
else
ShowAlert("myTag is null.");
}
return null;
}
private void createPendingIntent() {
if (pendingIntent == null) {
Activity activity = getActivity();
Intent intent = new Intent(activity, activity.getClass());
intent.addFlags(Intent.FLAG_ACTIVITY_SINGLE_TOP| Intent.FLAG_ACTIVITY_CLEAR_TOP);
pendingIntent = PendingIntent.getActivity(activity, 0, intent, 0);
}
}
private void startNfc() {
createPendingIntent(); // onResume can call startNfc before execute
getActivity().runOnUiThread(new Runnable() {
public void run() {
NfcAdapter nfcAdapter = NfcAdapter.getDefaultAdapter(getActivity());
if (nfcAdapter != null && !getActivity().isFinishing()) {
try {
nfcAdapter.enableForegroundDispatch(getActivity(), getPendingIntent(), getIntentFilters(), getTechLists());
if (p2pMessage != null) {
nfcAdapter.setNdefPushMessage(p2pMessage, getActivity());
}
} catch (IllegalStateException e) {
// issue 110 - user exits app with home button while nfc is initializing
Log.w(TAG, "Illegal State Exception starting NFC. Assuming application is terminating.");
}
}
}
});
}
private void stopNfc() {
Log.d(TAG, "stopNfc");
getActivity().runOnUiThread(new Runnable() {
public void run() {
NfcAdapter nfcAdapter = NfcAdapter.getDefaultAdapter(getActivity());
if (nfcAdapter != null) {
try {
nfcAdapter.disableForegroundDispatch(getActivity());
} catch (IllegalStateException e) {
// issue 125 - user exits app with back button while nfc
Log.w(TAG, "Illegal State Exception stopping NFC. Assuming application is terminating.");
}
}
}
});
}
private Activity getActivity() {
return this.cordova.getActivity();
}
private PendingIntent getPendingIntent() {
return pendingIntent;
}
private IntentFilter[] getIntentFilters() {
return intentFilters.toArray(new IntentFilter[intentFilters.size()]);
}
private String[][] getTechLists() {
//noinspection ToArrayCallWithZeroLengthArrayArgument
return techLists.toArray(new String[0][0]);
}
}
My index.js file
nfc.addTagDiscoveredListener(
function(nfcEvent){
console.log(nfcEvent.tag.id);
alert(nfcEvent.tag.id);
window.echo("readBlock#88");//call to plugin
},
function() {
alert("Listening for NFC tags.");
},
function() {
alert("NFC activation failed.");
}
);
SE_NfcA.js(plugin interface for interaction b/w index.js and SE_NfcA.java)
window.echo = function(natureOfTalk)
{
alert("Inside JS Interface, arg =" + natureOfTalk);
cordova.exec(function(result){alert("Result is : "+result);},
function(error){alert("Some Error happened : "+ error);},
"SE_NfcA","TalkToNFC",[{"type": natureOfTalk}]);
};
I guess I have messed up with the Intents/Activity Life-Cycle, please help. TIA!
I found a tweak/hack and made it to work.
Before making any call to read or write, I made one dummy Initialize call.
window.echo("Initialize");
window.echo("readBlock#88");//call to plugin to read.
And in the native code of the plugin, on receiving the "Initialize" token I made a startNFC() call.
else if(TypeOfTalking.equalsIgnoreCase("Initialize"))
{
startNfc();
}
how can I check if Activity is started by default or a method of the Activity is called from an intent in an other activity?
I think at the moment my Code is very bad, because i handle it over a Try/Catch
It works fine, but i want better code
public class MyScan extends Activity {
public final static String EXTRA_MESSAGE = ".MESSAGE";
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
checkIntent();
}
public void checkIntent() {
try {
Intent i = getIntent();
String method_name = i.getStringExtra("method_name");// is firing an error if there is no intent call
if (method_name.equals("scanBarcode")) {
scanBarcode2();// That starts my method
}
} catch (Exception e) {
setContentView(R.layout.activity_my_scan); // that shows just my Content
}
}
....
Thanky you for your hint Alex Terreaux
i changed the code this way
public void checkIntent() {
Intent i = getIntent();
if (i != null) {
String method_name = i.getStringExtra("method_name");
if (method_name != null && method_name.equals("scanBarcode")) {
scanBarcode2();
} else {
setContentView(R.layout.activity_my_scan);
}
}
}
and that works.
Try checking if the result of getIntent() is null.
You could use extras. In strings.xml add a new string:
<string name="starting_from_intent">STARTING_FROM_INTENT</string>
In the file where you are starting the activity by intent you can use:
intent.putExtra(getString(R.string.starting_from_intent), 1);
Then, in the checkIntent(), do:
boolean startedFromIntent;
Intent i = getIntent();
if (i.getIntExtra(getString(R.string.starting_from_intent), 0) == null
|| i.getIntExtra(getString(R.string.starting_from_intent), 0) == 0)
startedFromIntent = false;
else
startedFromIntent = true;
Hope this wasn't too hard to understand and hope this helps.
When your activity was started just by startActivity() a getCallingActivity() method in target activity will return null.
When it was called by startActivityForResult() it will return name of calling activity.
I have a written a receiver for a NEW_OUTGOING_CALL intent (static receiver). In order not to hold the system, I do the lengthy part of the process in a AsyncTask.
Based on the number dialed, I may or may not start the AsyncTask (and proceed with regular processing). However, the tasks starts on its own, with the right param passed, and I cant figure out how !!
I've grep'ed the project, and there are no other calls to LongOperation other than the one in the CallOneShot function - but the traces surrounding the 'new' statement do not appear.
How can this happen ?
Please find the code attached, sorry for the length, I've tried to cut it down a bit
Thanks for the help
J.
package com.iper.phoneeco;
public class MyReceiver extends BroadcastReceiver {
private static final String TAG = "XXBroadcastReceiver";
FileWriter fDevLog;
MyPrefs myprefs=null;
public final static String EXTRA_MESSAGE = "com.iper.phoneeco.msg1";
#Override
public void onReceive(Context context, Intent intent) {
if(intent.getAction().equalsIgnoreCase("android.intent.action.NEW_OUTGOING_CALL"))
{
Log.d(TAG,"OUTGOING CALL RECEIVED");
String phoneNumber = getResultData();
if (phoneNumber == null) {
// No reformatted number, use the original
phoneNumber = intent.getStringExtra(Intent.EXTRA_PHONE_NUMBER);
}
Log.d(TAG,"phone number:"+phoneNumber);
if (IsToProcess(phoneNumber)) {
Log.d (TAG,"Trapping the call");
// Lets Roll
CallOneShot(phoneNumber);
// and prevent other apps from calling as well
setResultData(null);
// abortBroadcast();
}
else {
Log.d (TAG,"Standard processing");
Toast.makeText(context, "standard processing" , Toast.LENGTH_LONG).show();
}
Log.d (TAG,"Finished processing intent");
}
//
// check is number against a list of exceptions, that we dont handle
//
private boolean IsToProcess(String num){
String[] excluded = {"15","17","18","112","911","991","08.*","^\\*.*","^#.*"};
for (String ex : excluded){
Log.d(TAG,"Exclusion test: "+ex + "versus: "+num);
if (num.matches(ex)) {
Log.d(TAG,"Exclusion FOUND: "+ex);
return false;
}
}
if (num.length() < myprefs.minLen) {
Log.d(TAG,"Exclusion FOUND: Numero trop court");
return false;
}
Log.d(TAG,"Exclusion not found: ");
return true;
}
//
// Displays a toast
//
void MyToast(String s, int col, int dur ) {
Toast toast=Toast.makeText(myprefs.ctx, s, dur);
toast.setGravity(Gravity.CENTER_HORIZONTAL, 0, 0);
toast.getView().setBackgroundColor(col );
LinearLayout toastLayout = (LinearLayout) toast.getView();
TextView toastTV = (TextView) toastLayout.getChildAt(0);
toastTV.setTextSize(20);
toast.show();
}
void MyToast(String s, int col) {
MyToast(s,col,Toast.LENGTH_LONG);
}
public void CallOneShot(String phoneNumber) {
Log.d (TAG,"CallOneShot");
MyToast (myprefs.ctx.getResources().getString(R.string.callbackipg)+" "+phoneNumber,Color.BLUE);
new LongOperation().execute(phoneNumber);
}
//
// the meat....
//
public class LongOperation extends AsyncTask<String, Void, String> {
String numToCall;
#Override
protected String doInBackground(String... params) {
int bytesRead;
ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream(1024);
byte[] buffer = new byte[1024];
String msgres;
String response;
Log.d(TAG, "Clientthread started");
numToCall=params[0];
Log.d(TAG, "numTocall"+numToCall);
// and add to the call log
ContentValues values = new ContentValues();
values.put(CallLog.Calls.NUMBER, numToCall);
values.put(CallLog.Calls.DATE, System.currentTimeMillis());
values.put(CallLog.Calls.DURATION, 0);
values.put(CallLog.Calls.TYPE, CallLog.Calls.OUTGOING_TYPE);
values.put(CallLog.Calls.NEW, 1);
values.put(CallLog.Calls.CACHED_NAME, "");
values.put(CallLog.Calls.CACHED_NUMBER_TYPE, 0);
values.put(CallLog.Calls.CACHED_NUMBER_LABEL, "");
Log.d(TAG, "Inserting call log placeholder for " + numToCall);
ContentResolver resolver = myprefs.ctx.getContentResolver();
resolver.insert(CallLog.Calls.CONTENT_URI, values);
response=myprefs.ctx.getResources().getString(R.string.errundef);
return response;
}
protected void onPostExecute (String s) {
if (!s.equals("ok")) {
Log.d(TAG,"OnPostExecute - failed: "+s);
MyToast (myprefs.ctx.getResources().getString(R.string.errcallback)+"\n"+s,Color.RED);
}
}
}
}
Have you assign value to myprefs. It seems that you have initialized it to null and never assign it to any value
ok - stupid me is the answer - I had changed the name of the package, and an old version of the package was still on the emulator, trapping the intent ! once I removed it, it all went back to normal...
Many thanks for your help anyway
I have a Form with edittexts and a button to call the camera with an intent (return a bitmap that is put into the imageview)...From the portrait mode i enter all edittext filed and then click the camera button which forwards me to the camera - in the camera i take a picture after what I get returned to Activity 1 (staying in portrait orientation - and all editext fields are restore in onRestoreInstanceState()) - and the last callback method of Activity 1 is onResume() (what is ok) - But the problem comes when I make an orientation change from this portrait to landscape mode - the callback methods are following
So the last callback orientation change is onPause(). I do not understand why? The problem is that onSaveInstanceState is called prior of onPause - so when I turn back to portrait mode everything will be empty (editexts, imageview..) - this strange behavior continues on every orientation change (the onPause() is called last).
I am sure this problem has to do something with the taking an image (startInentforResult....) because everything (editext fields) works fine on orientation change prior to taking an image...sometimes I can also take an image and it works fine, but in most cases not...
So my question is what is it that "drives" my Activity up to the onPause() method instead up to the onResume()?
Thanks, I would really appreciate if somebody knows the solution because I am struggling with this already a few days and could not find the solution.
The project has many classes but this is the activity code (Important to note is that the problem arises only when I take an image from camera app, after that the activity lifecycle goes crazy - also this activity is called from the main activity with 'startIntentforResult()'. I do not use 'android:configChanges="orientation|keyboardHidden"' to stop the recreatioin ):
public class NewCounterActivity extends Activity {
Button btnCreate;
Button btnCancel;
Button btnTakeImg;
ImageView counterImgView;
CheckBox existsDamage;
EditText inputNameFirst;
EditText inputNameLast;
EditText inputAdresse;
EditText inputCounterID;
EditText inputCounterValue;
EditText inputDescription;
TextView registerErrorMsg;
DatabaseHandler db;
//Data to be submitted
String nameFirst;
String nameLast;
String adresse;
String counterID;
String counterValue;
String countDescript;
String existsDmg;
Bitmap counterBitmap;
Bitmap recievedBitmap;
String longitude;
String latitude;
LocationTracker gps;
// JSON Response node names
private static String KEY_SUCCESS = "success";
private static String KEY_ERROR = "error";
private static String KEY_ERROR_MSG = "error_msg";
//The dimensions of the ImageView
int targetW;
int targetH;
// Some lifecycle callbacks so that the image can survive orientation change
#Override
protected void onSaveInstanceState(Bundle outState) {
super.onSaveInstanceState(outState);
Log.e("onSaveInstanceState", "fadsfass");
outState.putParcelable("bitmap", counterBitmap);
outState.putString("fname", inputNameFirst.getText().toString());
outState.putString("lname", inputNameLast.getText().toString());
outState.putString("adrese", inputAdresse.getText().toString());
outState.putString("cID", inputCounterID.getText().toString());
outState.putString("cValue", inputCounterValue.getText().toString());
outState.putString("Descript", inputDescription.getText().toString());
outState.putString("ErrorMsg", registerErrorMsg.getText().toString());
outState.putBoolean("damageCheck", existsDamage.isChecked());
((MyApplicationClass) getApplication()).detach(this);
}
#Override
protected void onRestoreInstanceState(Bundle savedInstanceState) {
super.onRestoreInstanceState(savedInstanceState);
Log.e("onRestoreInstanceState", "fadsfass");
counterBitmap = savedInstanceState.getParcelable("bitmap");
counterImgView.setImageBitmap(counterBitmap);
inputNameFirst.setText(savedInstanceState.getString("fname"));
inputNameLast.setText(savedInstanceState.getString("lname"));
inputAdresse.setText(savedInstanceState.getString("adrese"));
inputCounterID.setText(savedInstanceState.getString("cID"));
inputCounterValue.setText(savedInstanceState.getString("cValue"));
inputDescription.setText(savedInstanceState.getString("Descript"));
registerErrorMsg.setText(savedInstanceState.getString("ErrorMsg"));
existsDamage.setChecked(savedInstanceState.getBoolean("damageCheck"));
((MyApplicationClass) getApplication()).attach(this);
}
#Override
public void onContentChanged() {
// TODO Auto-generated method stub
super.onContentChanged();
Log.e("onContetnChanged", "fadsfass");
}
#Override
protected void onDestroy() {
// TODO Auto-generated method stub
super.onDestroy();
Log.e("onDestroy", "fadsfass");
}
#Override
public void onDetachedFromWindow() {
// TODO Auto-generated method stub
super.onDetachedFromWindow();
Log.e("onDetachedFromWindow", "fadsfass");
}
#Override
protected void onPause() {
// TODO Auto-generated method stub
super.onPause();
Log.e("onPause", "fadsfass");
}
#Override
protected void onRestart() {
// TODO Auto-generated method stub
super.onRestart();
Log.e("onRestart", "fadsfass");
}
#Override
protected void onResume() {
// TODO Auto-generated method stub
super.onResume();
Log.e("onResume", "fadsfass");
}
#Override
protected void onStart() {
// TODO Auto-generated method stub
super.onStart();
Log.e("onStart", "fadsfass");
}
#Override
protected void onStop() {
// TODO Auto-generated method stub
super.onStop();
Log.e("onStop", "fadsfass");
}
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.newcounteractivity_layout);
Log.e("onCreate", "mActivity equals NULL");
inputNameFirst = (EditText) findViewById(R.id.createFirstName);
inputNameLast = (EditText) findViewById(R.id.createLastName);
inputAdresse = (EditText) findViewById(R.id.createAdresse);
inputCounterID = (EditText) findViewById(R.id.createCounterID);
inputCounterValue = (EditText) findViewById(R.id.createCounterValue);
inputDescription = (EditText) findViewById(R.id.createDescription);
registerErrorMsg = (TextView) findViewById(R.id.create_error);
btnCreate = (Button) findViewById(R.id.btnCreate);
btnCancel = (Button) findViewById(R.id.btnCancel);
btnTakeImg = (Button) findViewById(R.id.btnImage);
counterImgView = (ImageView) findViewById(R.id.counterImgView);
existsDamage = (CheckBox) findViewById(R.id.createDamageExists);
//REGISTER BUTTON CLICK EVENTS
btnCreate.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
//new DoBackgroundTask(NewCounterActivity.this).execute();
//CounterUser data to submit
nameFirst = inputNameFirst.getText().toString().trim();
nameLast = inputNameLast.getText().toString().trim();
adresse = inputAdresse.getText().toString().trim();
counterID = inputCounterID.getText().toString().trim();
counterValue = inputCounterValue.getText().toString().trim();
countDescript = inputDescription.getText().toString().trim();
existsDmg = Integer.toString((existsDamage.isChecked()) ? 1 : 0);
// create LocationTracker class object
gps = new LocationTracker(NewCounterActivity.this);
if(!gps.canGetLocation()){
gps.stopUsingGPS();
gps.showSettingsAlert();
//Ovo se mozda treba i izbaciti
gps.getLocation();
}
else{
processInput();
}
}
});
btnCancel.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
Intent returnIntent = new Intent();
setResult(RESULT_CANCELED, returnIntent);
finish();
}
});
btnTakeImg.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
if(isIntentAvailable(NewCounterActivity.this, MediaStore.ACTION_IMAGE_CAPTURE)){
Intent takePictureIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
startActivityForResult(takePictureIntent,2);
}
else {
Toast.makeText(NewCounterActivity.this, "No Camera Available", Toast.LENGTH_SHORT).show();
}
}
});
}
/************************************************************************************************
* Methods used in this class
* */
public void processInput(){
//Get current Longitude and Latitude
longitude = Double.toString(gps.getLongitude());
latitude = Double.toString(gps.getLatitude());
//Na kraju iskljuci location updatese - ne moze na emulatru jer ja emit coordinate preko DDMS... a kad emit on mora biti ukljucen da bi primio
//gps.stopUsingGPS();
Toast.makeText(getApplicationContext(), "Your Location is - \nLat: " + longitude + "\nLong: " + latitude, Toast.LENGTH_LONG).show();
if (!nameFirst.equals("") && !nameLast.equals("") && !adresse.equals("") && !counterID.equals("") && !counterValue.equals("")
&& counterBitmap != null ){
new DoBackgroundTask(NewCounterActivity.this).execute();
}
else{
// Not all fields are filled
registerErrorMsg.setText("Not all fields are filled");
}
}
//Method to check whether an app can handle your intent
public boolean isIntentAvailable(Context context, String action) {
final PackageManager packageManager = context.getPackageManager();
final Intent intent = new Intent(action);
List<ResolveInfo> list = packageManager.queryIntentActivities(intent, PackageManager.MATCH_DEFAULT_ONLY);
return list.size() > 0;
}
/**************************************************************************************************
*
* When the calling activity, Activity #1, resumes after having called another activity, Activity #2, using startActivityForResult,
* the method onActivityResult in Activity #1 is called BEFORE onResume.
* This is important to know if you are instantiating your SQLite Database objects from within onResume in Activity #1. If so, you will also need to instantiate the object from within onActivityResult,
* when returning from Activity #2.
*
* startActivityForResult() is asynchronous. It can feel synchronous to the user since the UI will change and your calling activity will be paused
* (your onPause() method will be called).
*/
#Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
// TODO Auto-generated method stub
super.onActivityResult(requestCode, resultCode, data);
Log.e("onActivityResult", "fadsfass");
if (requestCode == 2) {
if(resultCode == RESULT_OK){
Bundle extras = data.getExtras();
recievedBitmap = (Bitmap) extras.get("data");
}
if (resultCode == RESULT_CANCELED) {
Toast.makeText(NewCounterActivity.this, "No Image Taken", Toast.LENGTH_SHORT).show();
}
}
}
/**
* Koristim onWindowFocusChanged jer kad se vratim na Activity 1 onda dodje do potpunog recreate Activitija i getWidth()/height() ne mogu dobiti
* ni u jednom od lifecicle methoda - naime ide start onCreate,...onActivityResult(), onResume() - u onactivityResult izvadim bitmap i pohranim ga u receivedBitmap
* te kad getWidth() postane dostupan system invoke ovu dole methodu. :D
*/
#Override
public void onWindowFocusChanged(boolean hasFocus){
if(recievedBitmap != null){
targetW=counterImgView.getWidth();
targetH=counterImgView.getHeight();
Log.e("onWindowFocusChanged", "fadsfass" + " " + targetW + " " + targetH);
// http://stackoverflow.com/questions/4837715/how-to-resize-a-bitmap-in-android
// http://sunil-android.blogspot.com/2013/03/resize-bitmap-bitmapcreatescaledbitmap.html
// Scale or resize Bitmap to ImageView dimensions
counterBitmap = Bitmap.createScaledBitmap(recievedBitmap, targetW, targetH, false);
/**
* Canvas: trying to use a recycled bitmap android.graphics - This exception occurs when you try to recycle a bitmap which is already recycled.
* http://androdevvision.blogspot.com/2011/10/solution-for-out-of-memory-error-and.html
*/
if(recievedBitmap != null && !recievedBitmap.isRecycled()){
recievedBitmap.recycle();
recievedBitmap = null;
}
counterImgView.setImageBitmap(counterBitmap);
}
}
/************************************************************************************************
* Background AsyncTask to create new counterUser - https://github.com/callorico/CustomAsyncTask - najbolje radi
* new DoBackgroundTask(NewCounterActivity.this).execute();
* */
private static class DoBackgroundTask extends CustomAsyncTask<Void, Integer, JSONObject> {
private static final String TAG = "DoBackgroundTask";
private ProgressDialog mProgress;
private int mCurrProgress;
private NewCounterActivity myActivity = null;
public DoBackgroundTask(NewCounterActivity activity) {
super(activity);
}
#Override
protected void onPreExecute() {
super.onPreExecute();
showProgressDialog();
}
#Override
protected void onActivityDetached() {
if (mProgress != null) {
mProgress.dismiss();
mProgress = null;
}
}
#Override
protected void onActivityAttached() {
showProgressDialog();
}
private void showProgressDialog() {
mProgress = new ProgressDialog(mActivity);
mProgress.setProgressStyle(ProgressDialog.STYLE_SPINNER);
mProgress.setIndeterminate(true);
mProgress.setMessage(" Saljem na server... ");
mProgress.setCancelable(true);
mProgress.setOnCancelListener(new OnCancelListener() {
#Override
public void onCancel(DialogInterface dialog) {
cancel(true);
}
});
mProgress.show();
mProgress.setProgress(mCurrProgress);
}
#Override
protected JSONObject doInBackground(Void... params) {
//so you need to either pass an instance of the outer class to the inner class method (or its constructor) as a parameter,
//or create it inside the method.
JSONObject json = null;
if(mActivity != null){
myActivity = (NewCounterActivity) mActivity;
//Prepare counterBitmap as String
ByteArrayOutputStream stream = new ByteArrayOutputStream();
//Write a compressed version of the bitmap to the specified output stream.
myActivity.counterBitmap.compress(Bitmap.CompressFormat.JPEG, 90, stream);
byte [] b_array = stream.toByteArray();
String bitmapString = Base64.encodeBytes(b_array);
//Get workerId from logged worker
Functions workerFunction = new Functions();
DatabaseHandler db = new DatabaseHandler(mActivity);
String workerID = db.retrieveWorker().get("workerId");
if(myActivity != null){
//Get JsonObject from Functions.java
json = workerFunction.newCounterUser(myActivity.counterID, myActivity.counterValue, myActivity.adresse, myActivity.nameFirst, myActivity.nameLast, bitmapString, myActivity.existsDmg, myActivity.countDescript, workerID, myActivity.longitude, myActivity.latitude);
}
}
return json;
}
#Override
protected void onPostExecute(JSONObject jsonObject) {
super.onPostExecute(jsonObject);
if (mActivity != null) {
mProgress.dismiss();
try {
if (jsonObject.getString(KEY_SUCCESS) != null) {
myActivity.registerErrorMsg.setText("");
String res = jsonObject.getString(KEY_SUCCESS);
if(Integer.parseInt(res) == 1){
// counterUser successfully registered
Toast.makeText(mActivity, "New counterUser is created", Toast.LENGTH_LONG).show();
// Return back to MainActivity
Intent returnIntent = new Intent();
returnIntent.putExtra("result",jsonObject.toString());
mActivity.setResult(RESULT_OK,returnIntent);
// Close all views before launching MainActivity
returnIntent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
mActivity.finish();
}else{
// Error in registration
myActivity.registerErrorMsg.setText("Error occured in registration");
}
}
} catch (JSONException e) {
Log.e("Error","NO Json at all");
e.printStackTrace();
}
} else {
Log.d(TAG, "AsyncTask finished while no Activity was attached.");
}
}
}
Same issues on call to recreate(), when activity has been updated it get onPause after onResume. Tested on emulator, bug exists on Marshallow and below.
This is my fix
private static boolean isRecreate = false;
private void reCreateActivity() {
isRecreate = true;
recreate();
}
#Override
public void onWindowFocusChanged(boolean hasFocus) {
super.onWindowFocusChanged(hasFocus);
if(isRecreate) {
isRecreate = false;
runOnUiThread(new Runnable() {
#Override
public void run() {
onResume();
}
});
}
}
I don't know if that's correct, but it works.
EDIT
Best solution to avoid this issues, call recreate in postDelayed with 0 delayMillis
new Handler().postDelayed(new Runnable() {
#Override
public void run() {
recreate();
}
}, 0);
It is only normal, that strange code produces strange behavior ...
replace this line:
((MyApplicationClass) getApplication()).detach(this);
with this line:
super.onSaveInstanceState(outState);
I have a activity am using a boolean condition to check some thing .if the boolean condition Satisfy i need to Go to The next Page. But When The condition Satisfy the Device get crash With NullPointerException Am giving The Code Below
The Boolean Condition
boolean check()
{
boolean matches=false;
int falseFlag=0;
if(cc.length==picarray.length)
{
for (int i=0;i<cc.length;i++)
{
if(cc[i].equals(picarray[i]))
{
//---The Database Value Stored in Array is modified---
xmin=X[i]-25;
xmax=X[i]+25;
ymin=Y[i]-25;
ymax=Y[i]+25;
//---Check Whether The Selected Password Is Inside The Array Values---
if(xmin<realx[i]&&realx[i]<xmax)
{
System.out.println("TRUE");
}
else
{
falseFlag++;
System.out.println("FALSE");
}
if(ymin<realy[i]&&realy[i]<ymax)
{
System.out.println("TRUE");
}
else
{
falseFlag++;
System.out.println("FALSE");
}
}
else
{
falseFlag++;
}
}
}
else
{
falseFlag++;
}
if(falseFlag==0)
{
matches=true;
}
System.out.println("Authentication returns "+matches);
return matches;
}
in button click
b.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
if(check())
{
Intent sa=new Intent(Test.class,Test2.class);
startActivity(sa);
System.out.println("U R AUTHENTICATED");
}
else
{
System.out.println("INVALID USER");
Toast.makeText(getApplicationContext(), "INVALID USER", Toast.LENGTH_LONG).show();
}
}
});
try this,
Intent sa=new Intent(getApplicationContext(),Test2.class);
basically intent needs context and not a class...
i doub't this (Intent sa=new Intent(Test.class,Test2.class);) will compile
The first argument is a Context so when you create the intent, it should be:
Intent sa=new Intent(Test.this,Test2.class);
instead of
Intent sa=new Intent(Test.class,Test2.class);
This should also work:
Intent sa=new Intent(v.getContext(),Test2.class);
Intent sa=new Intent(Test.class,Test2.class);
The first parameter should be Test.this(Context), is it not throwing a Compile-time error ??