Develop Reference

App crashed when using setText method

Problem: My app crashed whenever the comment part is removed. But after I had tried to debug the problem seemed to be at line priceTextViews[i].setText(price[i]). Can anyone help to point out the problem? Thank you
TextView[] quantityTextViews;
TextView[] priceTextViews;
int[] unitPrice = {5, 15, 40, 20, 25, 15, 20, 25, 10, 20};
int[] price = new int[10];
int[] quantity = new int[10];
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.balance_page);
textView();
Intent intent = getIntent();
String[] quantityOfItemString = intent.getStringArrayExtra (ShoppingPageActivity.EXTRA_MESSAGE);
for (int i = 0; i < quantityTextViews.length; i++) {
quantityTextViews[i].setText(quantityOfItemString[i]);
quantity[i] = Integer.parseInt(quantityOfItemString[i]);
price[i]= unitPrice[i]* quantity[i];
}
/*for (int i = 0; i < priceTextViews.length; i++) {
price[i]= unitPrice[i]* quantity[i];
priceTextViews[i].setText(price[i]);
}*/
}
public void textView() {
quantityTextViews = new TextView[]{
(TextView) findViewById(R.id.textView49),
(TextView) findViewById(R.id.textView48),
(TextView) findViewById(R.id.textView47),
(TextView) findViewById(R.id.textView46),
(TextView) findViewById(R.id.textView45),
(TextView) findViewById(R.id.textView44),
(TextView) findViewById(R.id.textView43),
(TextView) findViewById(R.id.textView42),
(TextView) findViewById(R.id.textView41),
(TextView) findViewById(R.id.textView40),
};
priceTextViews = new TextView[]{
(TextView) findViewById(R.id.textView51),
(TextView) findViewById(R.id.textView52),
(TextView) findViewById(R.id.textView53),
(TextView) findViewById(R.id.textView54),
(TextView) findViewById(R.id.textView55),
(TextView) findViewById(R.id.textView56),
(TextView) findViewById(R.id.textView57),
(TextView) findViewById(R.id.textView58),
(TextView) findViewById(R.id.textView59),
(TextView) findViewById(R.id.textView50),
};
}

setText requires a string. The setText method that does accept an int needs to correspond to a text resource within your application.
priceTextViews[i].setText(Integer.toString(price[i]));

When you're using setText with int argument it automatically use setText(#StringRes int resid) instead of void setText(CharSequence text), so cast your argument to String or similar CharSequence type.
Easiest solution is
priceTextViews[i].setText("" + price[i]);

How to make decision in onClick

This is for searching the word on the TextView
public void viewWord(View view)
{
score = (TextView)findViewById(R.id.yourScore);
tv2 = (TextView)findViewById(R.id.tv2);
tv3 = (TextView)findViewById(R.id.tv3);
searchWord = (ImageView) findViewById(R.id.searchWord);
wordList = (ListView) findViewById(R.id.wordList);
text = (AutoCompleteTextView) findViewById(R.id.textHere);
wordList = (ListView) findViewById(R.id.wordList);
//SearchWord in AutoCompleteTextView text
//Display equivalent score of word in TextView score
String s1= search.getText().toString();
String s2= dbHelper.getData(s1);
score.setText(s2);
tv2.setText(s2);
tv3.setText(s2);
//Get data from textview
ArrayAdapter<String> adapter = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, new ArrayList<String>());
wordList.setAdapter(adapter);
adapter.add(text.getText().toString());
adapter.notifyDataSetChanged();
text.setText("");
add();
}
public void add (){
x = Integer.parseInt(tv2.getText().toString());
y = Integer.parseInt(tv3.getText().toString());
z = x + y;
score.setText(Double.toString(z));
}
In my app, I am using an ImageView to search the word and display the score. I am having a hard time in displaying the score using 1 TextView so I decided to make it 2. I want my ImageView to function like this:
if(onMyImageViewFirstClick){
display the score on textview1
}
else{
if(onMyImageViewSecondClick){
display the score on textview2
}
how can i do it this way? Any suggestions will be highly appreciated :)
Note: I am new in android programming. I would appreciate if you'll also help me with the codes

You can do it with a class variable changin his value between 0 - 1, for example:
private int optionTxtView = 0
imageButton = (ImageButton) findViewById(R.id.imageButton1);
imageButton.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View arg0) {
if(optionTxtView == 0){
//display the score on textview1
optionTxtView = 1;
}else{
//display the score on textview2
optionTxtView = 0;
}
}
});
or you can use a boolean value (suggested by #mapo)
private boolean optionTxtView;
imageButton = (ImageButton) findViewById(R.id.imageButton1);
imageButton.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View arg0) {
if(optionTxtView){
//display the score on textview1
optionTxtView = false;
}else{
//display the score on textview2
optionTxtView = true;
}
}
});
So, according to your code, the solution must be:
//declare a boolean variable
private int optionTxtView = 0
public void viewWord(View view) {
...
...
...
//SearchWord in AutoCompleteTextView text
//Display equivalent score of word in TextView score
String s1= search.getText().toString();
String s2= dbHelper.getData(s1);
score.setText(s2);
if(optionTxtView == 0){
//display the score on textview1
tv2.setText(s2);
optionTxtView = 1;
}else{
//display the score on textview2
tv3.setText(s2);
optionTxtView = 0;
}
...
...
...
}

Here's how you can implement a click counter.
Note how you reset the counter when a total of 2 clicks are registered. Once that happens the counter starts over and again will first affect tv1 and then tv2.
// Find TextViews before (so you don't have to repeat this expensive operation)
final TextView tv1 = findViewById(R.id.textView1);
final TextView tv2 = findViewById(R.id.textView2);
imageButton.setOnClickListener(new View.OnClickListener() {
int numberOfClicks = 0;
#Override
public void onClick(View view) {
++numberOfClicks;
if(numberOfClicks < 2){
tv1.setText("Some text");
} else if(numberOfClicks >= 2){
tv1.setText("Some other text");
// Reset the click counter
numberOfClicks = 0;
}
}
});

Calculating Values inside ArrayList

I have an Array List that i am getting Values from the EditText widget and placing them inside an Array List
I would like to do a Calculation and output the total to a Text View
The Program is Running fine it just crashes when i hit Calculate..
ArrayList<String> score = new ArrayList<String>();
public class MyActivity extends Activity {
EditText T1, T2, T3, T4, T5, T6, T7, T8, T9;
TextView total;
int sum = 0;
Button ButtonClear, ButtonScore;
ArrayList<String> score = new ArrayList<String>();
#Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_my);
T1 = (EditText) findViewById(R.id.editText2);
T2 = (EditText) findViewById(R.id.editText3);
T3 = (EditText) findViewById(R.id.editText4);
T4 = (EditText) findViewById(R.id.editText5);
T5 = (EditText) findViewById(R.id.editText6);
T6 = (EditText) findViewById(R.id.editText7);
T7 = (EditText) findViewById(R.id.editText8);
T8 = (EditText) findViewById(R.id.editText9);
T9 = (EditText) findViewById(R.id.editText10);
total = (TextView) findViewById(R.id.textView28);
ButtonScore = (Button) findViewById(R.id.buttonScore);
ButtonClear = (Button) findViewById(R.id.buttonClear);
score.add(T1.getText().toString());
score.add(T2.getText().toString());
score.add(T3.getText().toString());
score.add(T4.getText().toString());
score.add(T5.getText().toString());
score.add(T6.getText().toString());
score.add(T7.getText().toString());
score.add(T8.getText().toString());
score.add(T9.getText().toString());
public void Calculate(View v)
{
for (int i = 0; i < score.size(); i++)
{
sum = Integer.valueOf(score.get(i));
}
total.setText(sum);
}

You are setting integer value to textview therefore it crash,So change
total.setText(sum);
to
total.setText(String.valueOf(sum));
And to calculate sum do like
sum += Integer.valueOf(score.get(i));

Approach to get values of a dynamically generated textView

I successfully created a dynamic TextView and a Button now when ever the button was clicked the value of a TextView changes.
But the problem is I have a final "submit button" outside a loop which should get the INDIVIDUAL values of each TextView and I cant think of a way how to do it can someone pls give me an approach for this thanks!. pls be nice..
code
Cursor citem= sdb.rawQuery("SELECT * FROM ITEM INNER JOIN CATEGORY ON item.categoryid = category.id where category.categoryname='"+fcat+"'", null);
ScrollView scrollView= new ScrollView(this);
LinearLayout mainLayout= new LinearLayout(this);
mainLayout.setOrientation(LinearLayout.VERTICAL);
Button border = new Button(this);
border.setId(Integer.parseInt(cuser.getString(cuser.getColumnIndex("id"))));;
border.setText("ORDER");
while (citem.moveToNext())
{
byte[] blob =citem.getBlob(citem.getColumnIndex("itemimage"));
int id = Integer.parseInt(citem.getString(citem.getColumnIndex("id")));
LinearLayout linearLayout = new LinearLayout(this);
linearLayout.setOrientation(LinearLayout.HORIZONTAL);
linearLayout.setTag(id);
int i;
ImageView iv = new ImageView(this);
iv.setId(id);
iv.setImageBitmap(dh.getPhoto(blob));
final TextView txtquantity = new TextView(this);
txtquantity.setId(id);
txtquantity.setText("0");
txtquantity.setTextSize(20);
final TextView txtprice = new TextView(this);
txtprice.setId(id);
txtprice.setText(citem.getString(citem.getColumnIndex("itemprice")));
txtprice.setTextSize(30);
ImageButton btn1 = new ImageButton(this);
btn1.setId(id);
final int id_ = btn1.getId();
btn1.setImageResource(R.drawable.ic_launcher);
btn1.setOnClickListener(new View.OnClickListener() {
public void onClick(View view) {
int i = 0;
i=Integer.parseInt((String) txtquantity.getText())+1;
txtquantity.setText(String.valueOf(i));
totalprice.setText(String.valueOf(Integer.parseInt(totalprice.getText().toString())+(Integer.parseInt(txtprice.getText().toString())*1)));
}
});
ImageButton btn2 = new ImageButton(this);
btn2.setId(id);
final int id2_ = btn2.getId();
btn2.setImageResource(R.drawable.ic_launcher);
btn2.setOnClickListener(new View.OnClickListener() {
public void onClick(View view) {
if(Integer.parseInt((String)txtquantity.getText())<=0)
{
}
else
{
int i=0;
i= Integer.parseInt((String) txtquantity.getText())-1;
txtquantity.setText(String.valueOf(i));
totalprice.setText(String.valueOf(Integer.parseInt(totalprice.getText().toString())-(Integer.parseInt(txtprice.getText().toString())*1)));
}
}
});
linearLayout.addView(iv);
linearLayout.addView(txtprice);
linearLayout.addView(btn1);
linearLayout.addView(txtquantity);
linearLayout.addView(btn2);
mainLayout.addView(linearLayout);
}
mainLayout.addView(totalprice);
mainLayout.addView(border);
scrollView.addView(mainLayout);
setContentView(scrollView);

Not quite sure what problem you're having? If it's just reading all the TextViews you created in the loop, then you should just keep a list, and send it off for processing when you submit...
List<TextView> tv_list = new ArrayList<TextView>();
while(...){
//In loop..add your tv's
TextView some_tv = new TextView()
tv_list.add(some_tv);
...
}
//In the submit, send them off for processing...
private void process_tvs(List<TextView> tv_list){
for(TextView tv:tv_list){
//Assuming your tv's have numbers...
int val = Integer.valueOf(tv.getText().toString());
//do something....
}
}

defining a view based upon a int

is there anyway to change which view you are editing based upon the value of a int?
Without using a if statement?
for example:
int counter = 1;
public void attach(){
final SharedPreferences sp = PreferenceManager.getDefaultSharedPreferences(this);
TextView text1 = (TextView) findViewById(R.id.text1)
TextView text2 = (TextView) findViewById(R.id.text2)
TextView text3 = (TextView) findViewById(R.id.text3)
TextView text4 = (TextView) findViewById(R.id.text4)
if (counter < 5){
if (sp.getInt("test" + counter , 0) == counter){
text + counter .setText("test" + counter);
}else{counter = counter + 1; attach();}}
}

Simplest way is to define an array of possible view IDs.
int[] viewIds = new int[] {
R.id.text1,
R.id.text2,
R.id.text3,
R.id.text4
}
//some code
int i = /*whatever*/;
TextView tv = (TextView)findViewById(viewIds[i]);
tv.setText("test"+i);