I want to store selected checkbox values in ArrayList. There is five checkbox if I select three then they will store on ArrayList. I used String []ad = new String[5]; is it write on not to store the value of checkbox
public class MainActivity extends AppCompatActivity implements View.OnClickListener {
List<String> mList = new ArrayList<>();
CheckBox android, java, python, php, unity3D;
Button submitButton;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
android = (CheckBox) findViewById(R.id.androidCheckBox);
android.setOnClickListener(this);
java = (CheckBox) findViewById(R.id.javaCheckBox);
java.setOnClickListener(this);
python = (CheckBox) findViewById(R.id.pythonCheckBox);
python.setOnClickListener(this);
php = (CheckBox) findViewById(R.id.phpCheckBox);
php.setOnClickListener(this);
unity3D = (CheckBox) findViewById(R.id.unityCheckBox);
unity3D.setOnClickListener(this);
submitButton = (Button) findViewById(R.id.submitButton);
submitButton.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
Log.e("ArrayList Values*******",mList.toString());
}
});
}
#Override
public void onClick(View view) {
switch (view.getId()) {
case R.id.androidCheckBox:
if (android.isChecked()) {
mList.add(String.valueOf(android.getText()));
Log.e("Android*******",mList.toString());
}
break;
case R.id.javaCheckBox:
if (java.isChecked()) {
mList.add(String.valueOf(java.getText()));
Log.e("Java*******",mList.toString());
}
break;
case R.id.phpCheckBox:
if (php.isChecked()) {
mList.add(String.valueOf(php.getText()));
Log.e("PHP*******",mList.toString());
}
break;
case R.id.pythonCheckBox:
if (python.isChecked()){
mList.add(String.valueOf(python.getText()));
Log.e("Python*******",mList.toString());
}
break;
case R.id.unityCheckBox:
if (unity3D.isChecked()){
mList.add(String.valueOf(unity3D.getText()));
Log.e("Unity*******",mList.toString());
}
break;
}
}
}
Just create a List and add values when your click events are fired:
final List<String> mList = new ArrayList<>();
mList.add("Your value");
Note: consider to implement onCheckChangeListener intead of onClickListener to handle your checkbox selection events.
No, it's not quite correct.
I strongly recommend creating the array when the user presses submitButton. Otherwise, if they check some boxes, and either
Rotate the screen, or
Put the app in the background and the Activity gets destroyed by the system (You can simulate this by selecting the "Don't keep Activities" option in Developer Options)
When they see your UI again, it will be correctly re-created - all the boxes the user has checked will still be checked, but your array will be empty! I recommend something like
submitButton = (Button) findViewById(R.id.submitButton);
submitButton.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
String []ad = new String[5];
if (android.isChecked()) {
ad[0] = (String) android.getText();
}
if (java.isChecked()) {
ad[1] = (String) java.getText();
}
...
}
});
If you care about ad outside the context of submitting the user's choices, the best practice is to save it in the Bundle in public void onSaveInstanceState(Bundle outState) {}
and fetch and set it in your onCreate(Bundle savedInstanceState){}. This way you will not loose data even on orientation change, or on the system destroying your Activity. See this answer for details on how to do that.
Related
I know that was already asked but it is outdated:
I have 2 buttons that represent 2 choices and if one is selected the background color gets changed to yellow. But if i want to change the choice i need to somehow reset the button:
I already try to set it back but some old design comes out. Can you provide me the id of the modern button style? And show me how to implement it?
int myChoice;
if (view == findViewById(R.id.choice1)){
myChoice = 1;
choice1.setBackgroundColor(getResources().getColor(R.color.highlightButton));
choice2.setBackgroundResource(android.R.drawable.btn_default);
}
else if (view == findViewById(R.id.choice2)){
myChoice = 2;
choice2.setBackgroundColor(getResources().getColor(R.color.highlightButton));
choice1.setBackgroundResource(android.R.drawable.btn_default);
}
}
Use Tags with getBackground(). This will assure you are always setting back to original.
Add following in beginning of function
if (v.getTag() == null)
v.setTag(v.getBackground());
Then instead of setBackgroundResource, use
v.setBackground(v.getTag());
Starting from here, you can store the default color of the button into a Drawable and grab the selection color (Yellow in your case) into anther Drawable, then toggle background colors of buttons with these Drawable variables
please check below demo
public class MainActivity extends AppCompatActivity {
private Drawable mDefaultButtonColor;
private Drawable mSelectedButtonColor;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
final Button btn1 = findViewById(R.id.btn1);
final Button btn2 = findViewById(R.id.btn2);
mDefaultButtonColor = (btn1.getBackground());
mSelectedButtonColor = ContextCompat.getDrawable(this, R.color.buttonSelected);
btn1.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
toggleButton(btn1, true);
toggleButton(btn2, false);
}
});
btn2.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
toggleButton(btn1, false);
toggleButton(btn2, true);
}
});
}
private void toggleButton(Button button, boolean isSelected) {
button.setBackground(isSelected ? mSelectedButtonColor : mDefaultButtonColor);
}
}
I am creating an android dictionary app with sounds... I have listview, when an item is selected, a new activity open, inside the new activity contains 4 textviews and an image button, the textviews function perfectly but the image button was not. The audio files are placed in raw folder. How can I put the specific sounds of an item that was clicked?
Here's the code:
MainActivityJava
public class MainActivity extends AppCompatActivity {
ListView lv;
SearchView sv;
String[] tagalog= new String[] {"alaala (png.)","araw (png.)","baliw (png.)","basura (png.)",
"kaibigan (png.)","kakatuwa (pu.)", "kasunduan (png.)","dambuhala (png.)",
"dulo (png.)","gawin (pd.)","guni-guni (png.)","hagdan (png.)","hintay (pd.)",
"idlip (png.)","maganda (pu.)","masarap (pu.)", "matalino (pu.)"};
int[] sounds= new int[]{R.raw.alaala,
R.raw.araw,
R.raw.baliw,
R.raw.basura,
R.raw.kaibigan,
R.raw.kakatuwa,
R.raw.kasunduan,
};
ArrayAdapter<String> adapter;
#TargetApi(Build.VERSION_CODES.HONEYCOMB)
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
lv = (ListView) findViewById(R.id.listView1);
sv = (SearchView) findViewById(R.id.searchView1);
adapter = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1,tagalog);
lv.setAdapter(adapter);
lv.setOnItemClickListener(new OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
String tagword =tagalog[position];
String[] definition = getResources().getStringArray(R.array.definition);
final String definitionlabel = definition[position];
String[] cuyuno = getResources().getStringArray(R.array.cuyuno);
final String cuyunodefinition = cuyuno[position];
String[] english = getResources().getStringArray(R.array.english);
final String englishdefinition = english[position];
Intent intent = new Intent(getApplicationContext(), DefinitionActivity.class);
intent.putExtra("tagword", tagword);
intent.putExtra("definitionlabel", definitionlabel);
intent.putExtra("cuyunodefinition",cuyunodefinition);
intent.putExtra("englishdefinition", englishdefinition);
startActivity(intent);
}
});
sv.setOnQueryTextListener(new SearchView.OnQueryTextListener() {
#Override
public boolean onQueryTextSubmit(String text) {
return false;
}
#Override
public boolean onQueryTextChange(String text) {
adapter.getFilter().filter(text);
return false;
}
});
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
return super.onCreateOptionsMenu(menu);
}
}
DefinitionActivity.java
public class DefinitionActivity extends AppCompatActivity {
MediaPlayer mp;
String tagalogword;
String worddefinition;
String cuyunoword;
String englishword;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_definition);
TextView wordtv = (TextView) findViewById(R.id.wordtv);
TextView definitiontv = (TextView) findViewById(R.id.definitiontv);
TextView cuyunotv = (TextView) findViewById(R.id.cuyunotv);
TextView englishtv = (TextView) findViewById(R.id.englishtv);
ImageButton playbtn = (ImageButton) findViewById(R.id.playbtn);
final Bundle extras = getIntent().getExtras();
if (extras != null) {
tagalogword = extras.getString("tagword");
wordtv.setText(tagalogword);
worddefinition = extras.getString("definitionlabel");
definitiontv.setText(worddefinition);
cuyunoword = extras.getString("cuyunodefinition");
cuyunotv.setText(cuyunoword);
englishword = extras.getString("englishdefinition");
englishtv.setText(englishword);
}
playbtn.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
}
});
}
you can pass the raw id in the intent extra and play it on meadiaPlayer
What you want to accomplish is pretty simple.
you can ofcourse pass the id.
But I created this method for your case you can paste it in your activity or class and make a call to it. In my case, I put this method in a class that holds all the common functions, methods, strings, etc. The choice is yours :
public static void playDisSound(Context c, int soundID){
//Play short tune
MediaPlayer mediaPlayer = MediaPlayer.create(c, soundID);
mediaPlayer.setOnCompletionListener( new OnCompletionListener(){
#Override
public void onCompletion( MediaPlayer mp){
mp.release();
}
});
mediaPlayer.start();
}
And this is how to use it in your case :
Example I want to play an audio track from :
int[] sounds= new int[]{R.raw.alaala,
R.raw.araw,
R.raw.baliw,
R.raw.basura,
R.raw.kaibigan,
R.raw.kakatuwa,
R.raw.kasunduan,
};
So I just do :
//TODO ~ pls. remember to define context inside "onCreate" as
//call this before "onCreate"
Context context;
//And do this inside "onCreate" :
context = getApplicationContext();
OR
context = MainActivity.this;
//Then here comes the solution, just make a call to the playDisSound method with the id , in this case the "sounds[postion_referencer_i]"
playDisSound(context, sounds[postion_referencer_i]);
//And now on the question of what your "position_referencer_i" would be .... it also depends on how you intend to pass the id.
Are your going to make a match between the position picked and the position of the sound. It depends on you. But I would have created a set of integers to signify which try I want to play and do a matching simple calculation between the position picked for the item clicked to arrive at the position_referencer_id.
//But simply : note that in your array if I want to play for example "R.raw.baliw" I would just call :
playDisSound(context, R.raw.baliw);
I hope this works perfectly for you. So if I elaborated too much. Do let me know if you may need to stream the sound so I would just paste/send you a very cool method I have been using here in an app am working.
//FINALLY PLS. Remember this : this method would play the sound alright but it wont hesitate to play the sound all over again if you repeat the process. So do remember to check if the sound did play and finished before allowing the user to repeat, if not it could lead to repeated or kind of two speakers playing from the same song but at different time. (And the user may start to think that there is problem with the app. Pls. be very logical and sensitive in using this method)
In solving that, you can disable the button or the UI element that initiates the sound playing until the sound has finished playing, by way of monitoring duration of the track (which I am sure you should know and inculcate into your logic or by simply listening if sound is already playing)
All the best. Era. :)
I have just started Android Studio and am also a little new to java, so please excuse the inefficient code.
Anyway, when I click on the button on the main activity on my app to take the user to the activity that I want to display the images, my app stops working and it throws an OutOfMemoryError.
Here is MainActivty.java:
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Button presidentQuizButton = (Button) findViewById(R.id.presidentQuizButton);
Button reviewPresidentsButton = (Button) findViewById(R.id.reviewPresidentsButton);
presidentQuizButton.setOnClickListener(new Button.OnClickListener(){
public void onClick(View v){
//when button is clicked, do something
}
});
reviewPresidentsButton.setOnClickListener(new Button.OnClickListener(){
public void onClick(View v){
//when button is clicked, do something
startActivity(new Intent(MainActivity.this, presidentReviewActivity.class));
}
});
}
Here is presidentReviewActivity.java:
ImageView imageView;
public int presidentNumber = 0;
private Drawable drawable;
private Drawable [] drawables = null;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_president_review);
Button menuButton = (Button) findViewById(R.id.menuButton);
Button nextButton = (Button) findViewById(R.id.nextButton);
Button backButton = (Button) findViewById(R.id.backButton);
drawables = new Drawable[]{
getResources().getDrawable(R.drawable.president1),
getResources().getDrawable(R.drawable.president2),
getResources().getDrawable(R.drawable.president3),
getResources().getDrawable(R.drawable.president4),
getResources().getDrawable(R.drawable.president5),
getResources().getDrawable(R.drawable.president6),
getResources().getDrawable(R.drawable.president7),
getResources().getDrawable(R.drawable.president8),
getResources().getDrawable(R.drawable.president9),
getResources().getDrawable(R.drawable.president10),
getResources().getDrawable(R.drawable.president11),
getResources().getDrawable(R.drawable.president12),
getResources().getDrawable(R.drawable.president13),
getResources().getDrawable(R.drawable.president14),
getResources().getDrawable(R.drawable.president15),
getResources().getDrawable(R.drawable.president16),
getResources().getDrawable(R.drawable.president17),
getResources().getDrawable(R.drawable.president18),
getResources().getDrawable(R.drawable.president19),
getResources().getDrawable(R.drawable.president20),
getResources().getDrawable(R.drawable.president21),
getResources().getDrawable(R.drawable.president22),
getResources().getDrawable(R.drawable.president23),
getResources().getDrawable(R.drawable.president24),
getResources().getDrawable(R.drawable.president25),
getResources().getDrawable(R.drawable.president26),
getResources().getDrawable(R.drawable.president27),
getResources().getDrawable(R.drawable.president28),
getResources().getDrawable(R.drawable.president29),
getResources().getDrawable(R.drawable.president30),
getResources().getDrawable(R.drawable.president31),
getResources().getDrawable(R.drawable.president32),
getResources().getDrawable(R.drawable.president33),
getResources().getDrawable(R.drawable.president34),
getResources().getDrawable(R.drawable.president35),
getResources().getDrawable(R.drawable.president36),
getResources().getDrawable(R.drawable.president37),
getResources().getDrawable(R.drawable.president38),
getResources().getDrawable(R.drawable.president39),
getResources().getDrawable(R.drawable.president40),
getResources().getDrawable(R.drawable.president41),
getResources().getDrawable(R.drawable.president42),
getResources().getDrawable(R.drawable.president43),
getResources().getDrawable(R.drawable.president44),
};
menuButton.setOnClickListener(new View.OnClickListener(){
#Override
public void onClick(View v) {
finish();
}
});
nextButton.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
presidentNumber++;
drawable = drawables[presidentNumber];
imageView.setImageDrawable(drawable);
}
});
And here is most of the error log:
http://imgur.com/xzFfPrq
Instead of store all the drawable content in an array. You can actually just store the resource id in a array.
replace private Drawable [] drawables = null; with private int[] drawableids
replace drawables = new Drawable[]{...} to drawableids = new int[]{...}
replace
drawable = drawables[presidentNumber];
imageView.setImageDrawable(drawable);
to
drawable = getResource().getDrawable(drawableids[presidentNumber]);
imageView.setImageDrawable(drawable);
Try to change as above steps and try again.
The nullpointerexception may be caused by you did not init the drawableids array or you are still using the drawables array instead of drawableids.
you are trying to load large size images directly into memory which causes out of memory exceptions,this issue is discussed in details and a nice solution is given in developers site
How can i display list items on each button click. Lets say there are 4 names in the list. When I press next it displays the first name. Then when you press next it displays the second name and so on.
The only way I think is using the list.get() method. however I dont know how to use the method so that it knows how many values there are in the list and displaying then on each button hit. I think i need to use for method however I hadnt had any luck with it.
public class ZaidimasActivity extends ZaidejaiActivity {
public TextView mPlayer;
public TextView mKlausimas;
public Button mNext;
public Button mBack;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_zaidimas);
/** //get the player list from ZaidejaiActivity
Bundle recdData = getIntent().getExtras();
String myVal = recdData.getString("playerList"); */
Intent zaidejuInfo = getIntent();
Bundle extrasBundle = zaidejuInfo.getExtras();
final ArrayList<String> players = extrasBundle.getStringArrayList("playerList");
//show the first players name
mPlayer = (TextView)findViewById(R.id.ZaidejoVardas);
players.size();
mPlayer.setText(players.get(0));
mNext = (Button)findViewById(R.id.KitasBtn);
mNext.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
mPlayer.setText(players.get(1));
}
});
mBack = (Button)findViewById(R.id.GryztiMeniuBtn);
mBack.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Intent gryztiMeniu = new Intent(ZaidimasActivity.this, ZaidejaiActivity.class);
startActivity(gryztiMeniu);
}
});
}
Here you go, maintain a variable for storing the global array index and increment it every time the button is clicked.
private int count = 0; // Global array index. Make it as class field
final ArrayList<String> players = extrasBundle.getStringArrayList("playerList");
mPlayer = (TextView)findViewById(R.id.ZaidejoVardas);
players.size();
mPlayer.setText(players.get(0));
mNext = (Button)findViewById(R.id.KitasBtn);
mNext.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
count++;
mPlayer.setText(players.get((count)%players.size())); //Incrementing global count and making sure it never exceeds the players list size
}
});
Can anyone help me work out where I'm going wrong here. On the button click the media player plays one of the mfiles at random and I'm trying to set a textview depending on which file was played. Currently the setText if statements only match the audio playing half the time. Really not sure where I'm going wrong here.
private final int SOUND_CLIPS = 3;
private int mfile[] = new int[SOUND_CLIPS];
private Random rnd = new Random();
MediaPlayer mpButtonOne;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mfile[0] = R.raw.one;
mfile[1] = R.raw.two;
mfile[2] = R.raw.three;
//Button setup
Button bOne = (Button) findViewById(R.id.button1);
bOne.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
final TextView textOne = (TextView)findViewById(R.id.textView1);
mpButtonOne = MediaPlayer.create(MainActivity.this, mfile[rnd.nextInt(SOUND_CLIPS)]);
if (mpButtonOne==null){
//display a Toast message here
return;
}
mpButtonOne.start();
if (mfile[rnd.nextInt(SOUND_CLIPS)] == mfile[0]){
textOne.setText("one");
}
if (mfile[rnd.nextInt(SOUND_CLIPS)] == mfile[1]){
textOne.setText("two");
}
if (mfile[rnd.nextInt(SOUND_CLIPS)] == mfile[2]){
textOne.setText("three");
}
mpButtonOne.setOnCompletionListener(new soundListener1());
{
}
So just to clarify the problem I am having is that the setText only matches the audio occasionally, not on every click. The rest of the time it displays the wrong text for the wrong audio.
You are choosing another random file
mfile[rnd.nextInt(SOUND_CLIPS)]
set that to a variable in onClick() then check against that variable in your if statement
public void onClick(View v) {
int song = mfile[rnd.nextInt(SOUND_CLIPS)];
final TextView textOne = (TextView)findViewById(R.id.textView1);
mpButtonOne = MediaPlayer.create(MainActivity.this, song);
if (song == mfile[0]){
textOne.setText("one");
}
Edit
To make it a member variable so you can use it anywhere in the class, just declare it outside of a method. Usually do this before onCreate() just so all member variables are in the same place and it makes your code more readable/manageable.
public class SomeClass extends Activity
{
int song;
public void onCreate()
{
// your code
}
then you can just initialize it in your onClick()
public void onClick(View v) {
song = mfile[rnd.nextInt(SOUND_CLIPS)];
final TextView textOne = (TextView)findViewById(R.id.textView1);
mpButtonOne = MediaPlayer.create(MainActivity.this, song);