Error #1009: Cannot access a property or method of a null object reference. -AS3 [android help]

Error #1009: Cannot access a property or method of a null object reference. -AS3

i got this error:

TypeError: Error #1009: Cannot access a property or method of a null object reference.
    at TriviaGameDeluxe/saveScore()[TriviaGameDeluxe::frame102:19]

This is my code:

//**//
playAgainbutton.addEventListener(MouseEvent.CLICK,saveScore);


function saveScore(event:MouseEvent) { // Save the score


if (savedSN == null) { // Check if a game save is created. If it is not, create one 
trace("New game save created");
savedSN = { // Set the varible 'savedSN'
            name1:"-",
            name2:"-",
            name3:"-",
            name4:"-",

        score1:"-",
        score2:"-",
        score3:"-",
        score4:"-"};
soSavedScNa.data.nameScore = savedSN; // Set the data in the save file to the 
savedSN variable
soSavedScNa.flush(); // Overwrite existing save file

}

    //**// Save the score
        if ((gameScore > savedSN.score1 || savedSN.score1 == "-") && 
gameScore != 0) {
            trace("Score 1");
            savedSN = { // Set the date the savedSN varible will have
                    name1:PName.text,
                    name2:savedSN.name1,
                    name3:savedSN.name2,
                    name4:savedSN.name3,
                score1:gameScore,
                score2:savedSN.score1,
                score3:savedSN.score2,
                score4:savedSN.score3};
            soSavedScNa.data.nameScore = savedSN; // Set the data in 
the save file to the savedSN variable
            soSavedScNa.flush(); // Overwrite existing save file
            playAgainbutton.removeEventListener(MouseEvent.MOUSE_UP, 
saveScore);
            cleanUp();
            gotoAndStop(1); // Go to the start menu
        } else if ((gameScore > savedSN.score2 || savedSN.score2 == "-") && 
gameScore != 0) {
            trace("Score 2");
            savedSN = { // Set the date the savedSN varible will have
                    name1:savedSN.name1,
                    name2:PName.text,
                    name3:savedSN.name2,
                    name4:savedSN.name3,
                score1:savedSN.score1,
                score2:gameScore,
                score3:savedSN.score2,
                score4:savedSN.score3};
            soSavedScNa.data.nameScore = savedSN; // Set the data in 
the save file to the savedSN variable
            soSavedScNa.flush(); // Overwrite existing save file
            playAgainbutton.removeEventListener(MouseEvent.MOUSE_UP, 
saveScore);
            cleanUp();
            gotoAndStop(1);
             // Go to the start menu
        } else if ((gameScore > savedSN.score3 || savedSN.score3 == "-") && 
gameScore != 0) {
            trace("Score 3");
            savedSN = { // Set the date the savedSN varible will have
                    name1:savedSN.name1,
                    name2:savedSN.name2,
                    name3:PName.text,
                    name4:savedSN.name3,
                score1:savedSN.score1,
                score2:savedSN.score2,
                score3:gameScore,
                score4:savedSN.score3};
            soSavedScNa.data.nameScore = savedSN; // Set the data in 
the save file to the savedSN variable
            soSavedScNa.flush(); // Overwrite existing save file
            playAgainbutton.removeEventListener(MouseEvent.MOUSE_UP, 
saveScore);

            cleanUp();
            gotoAndStop(1); // Go to the start menu
        } else if ((gameScore > savedSN.score4 || savedSN.score4 == "-") && 
gameScore != 0) {
            trace("Score 4");
            savedSN = { // Set the date the savedSN varible will have
                    name1:savedSN.name1,
                    name2:savedSN.name2,
                    name3:savedSN.name3,
                    name4:PName.text,
                score1:savedSN.score1,
                score2:savedSN.score2,
                score3:savedSN.score3,
                score4:gameScore};
            soSavedScNa.data.nameScore = savedSN; // Set the data in 
the save file to the savedSN variable
            soSavedScNa.flush(); // Overwrite existing save file
            playAgainbutton.removeEventListener(MouseEvent.MOUSE_UP, 
saveScore);
            cleanUp();
            gotoAndStop(1); // Go to the start menu
        }
    }

I cannot find where the error is.. Hope anybody can help. Thanks.

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File object can't find the file when there is one [android help]

File object can't find the file when there is one

In my app After user clicks on a button ,the download manager starts to download a file from internet and saving it to the internal sd card using this code:

void startDownload()
    {
        Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOWNLOADS).mkdirs();        
        download_req.setAllowedNetworkTypes(DownloadManager.Request.NETWORK_WIFI | DownloadManager.Request.NETWORK_MOBILE)
        .setAllowedOverRoaming(false)
        .setTitle(PersianReshape.reshape("Downloading"))
        .setDescription(PersianReshape.reshape("currently downloading the file..."))
        .setDestinationInExternalPublicDir(Environment.getExternalStorageDirectory().getAbsolutePath() , packageId + ".sqlite");
        download_ID = mgr.enqueue(download_req);
    }

After it is downloaded, I plan to check its existance everytime app runs with this code:

String DatabaseAddress =
Environment.getExternalStorageDirectory().getAbsolutePath() +
"/ee.sqlite";
File file = new File(DatabaseAddress);
Log.d("PATH File: ", DatabaseAddress);
if (file.exists()){
Toast.makeText(getApplicationContext(), "found", Toast.LENGTH_SHORT).show();
}else{
Toast.makeText(getApplicationContext(), "not found", Toast.LENGTH_SHORT).show();
}

Now when I run this code it returns "not found" message whereas the file is already there (I checked its existance using a file manager).

the device I test on is nexus 7 and path used in saving the download file is: /storage/emulated/0/ee.sqlite

ee.sqlite is the filename of downloaded file.

/storage/emulated/0/ is the default path returned by app

Permissions added to manifest for this code are:

Q: Why does file.exists() returns false when there is a file?

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Disable checkbox if X are checked in android [android help]

Disable checkbox if X are checked in android

I have 15 CheckBox and I must to stuck user when he checks more than 5 CheckBox. Is it possible? I used the method OnCheckedChangeListener to know if an item was checked... but I don't know how to make a limit after 5 items selected. See what I've tried to do below:

I instante my integer:

int lengthBox = 15;
int lenghtMax = 5;  

I select all my View in onCreate():

View[] tagsItem = new View[] { 
    findViewById(R.id.TagsCheckAA),
    findViewById(R.id.TagsCheckBB),
    findViewById(R.id.TagsCheckCC),
    findViewById(R.id.TagsCheckDD),
    findViewById(R.id.TagsCheckEE),
    findViewById(R.id.TagsCheckFF),
    findViewById(R.id.TagsCheckGG),
    findViewById(R.id.TagsCheckHH),
    findViewById(R.id.TagsCheckII),
    findViewById(R.id.TagsCheckJJ),
    findViewById(R.id.TagsCheckKK),
    findViewById(R.id.TagsCheckLL),
    findViewById(R.id.TagsCheckMM),
    findViewById(R.id.TagsCheckNN),
    findViewById(R.id.TagsCheckOO)
};  

I create 15 CheckBox:

final CheckBox[] tagsCheck = new CheckBox[lengthBox];  

Create the method (and it's here where I don't know what to do exactly):

OnCheckedChangeListener checker = new OnCheckedChangeListener(){ 
    @Override
    public void onCheckedChanged(CompoundButton cb, boolean b) {
          if(tagsCheck[0].isChecked() || tagsCheck[1].isChecked() || 
             tagsCheck[2].isChecked() || tagsCheck[3].isChecked() || 
             tagsCheck[4].isChecked() || tagsCheck[5].isChecked() || 
             tagsCheck[6].isChecked() || tagsCheck[7].isChecked() || 
             tagsCheck[8].isChecked() || tagsCheck[9].isChecked() || 
             tagsCheck[10].isChecked() || tagsCheck[11].isChecked() || 
             tagsCheck[12].isChecked() || tagsCheck[13].isChecked() || 
             tagsCheck[14].isChecked()) {  
            if(lenghtCount < 5){
                    // How can I get the String of the CheckBox 
                    // which just checked?
                String tags = (String) tagsCheck[].getText();
                Toast.makeText(getApplicationContext(), 
                tags + " checked", Toast.LENGTH_SHORT).show();
            }else{
                Toast.makeText(getApplicationContext(), 
                "Limit reached!!!", Toast.LENGTH_SHORT).show();
            }
        }
    }
};  

After this, I set my View id to my CheckBox and call the method:

for(int i = 0; i < lengthBox; i++) {
    tagsCheck[i] = (CheckBox) tagsItem[i];
    tagsCheck[i].setOnCheckedChangeListener(checker);
}  

Can someone point me in the right way, please?

Thanks, any help will be appreciate.

---

UPDATE:

I found an inelegant way with an if(tagsCheck[0].isChecked() || ...). But I have still a problem: how can I get the CheckBox which just checked? Cause of my if(), I don't know how can I do this.

Thanks!

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MediaRecorder crash [android help]

MediaRecorder crash

---

Very beginner in Android/Java, coming from C and Symbian, I started from the Hellworld example to try to display the sound level (the project is to record this level in a text file for hours). This code is written in the MainActivity file, as a method inside the MainActivity Class :

public void GetAFlevel(View view) throws IllegalStateException, IOException {
    float audiolevel = 0, maxal = 0;
    MediaRecorder mRecorder = new MediaRecorder();
    mRecorder.setAudioSource(MediaRecorder.AudioSource.MIC);
    mRecorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);
    mRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);
    mRecorder.setOutputFile("/dev/null");
    mRecorder.prepare();
    mRecorder.start();
    for (int i = 0; i < 1000; i++) {
        audiolevel = mRecorder.getMaxAmplitude();
        if (audiolevel > maxal)
            maxal = audiolevel;
    }
    EditText editText1 = (EditText) findViewById(R.id.editText1);
    editText1.setText(String.valueOf(maxal));
    mRecorder.stop();
    mRecorder.release();
    mRecorder = null;
}

The result is a crash of the application on the target :

11-17 00:23:09.859: D/AndroidRuntime(22096): Shutting down VM

11-17 00:23:09.859: W/dalvikvm(22096): threadid=1: thread exiting with uncaught exception (group=0x40018578)

11-17 00:23:09.921: E/AndroidRuntime(22096): FATAL EXCEPTION: main

11-17 00:23:09.921: E/AndroidRuntime(22096): java.lang.IllegalStateException: Could not execute method of the activity

No crash if I remove the following MediaRecorder functions : setAudioSource, setOutputFormat, setAudioEncoder, setOutputFile, prepare, start and stop, but getMaxAmplitude returns 0, of course.

As soon as I add only setAudioSource (normaly the only necessary for getMaxAmplitude), crash !

Any idea ?

Thanks in advance.

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