I am currently new to Android Development and i am having a difficult time trying to use a self made class in my MainActivity Android class.
Let me give you an example;
I created a SquareArea class and want to use it in the MainActivity Class
public class SquareArea{
private double _length;
private double _width;
public SquareArea(double length , double width){
_length = length;
_width = width;
area();
}
private double area(){
return _length
}
}
When i instantiate the SquareClass in MainActivity class i want to be able to use the area() method and return when values that are Extracted from(EditText)
I want to use the value in order to place it in a text view;however this does not seem to happen.
I can do it with methods but i want to use my own classes instead.
Please help, I am getting frustrated with this.
///Below is my MainActivity Class///
public class MainActivity extends Activity {
EditText mEditText1;
EditText mEditText2;
EditText mEditText3;
TextView mTextView;
Button mButton;
Double value1, value2;
SquareArea sq1;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mEditText1 = (EditText) findViewById(R.id.editText1);
mEditText2 = (EditText) findViewById(R.id.editText2);
mEditText3 = (EditText) findViewById(R.id.editText3);
mTextView = (TextView) findViewById(R.id.textView1);
mEditText1.setBackgroundColor(Color.GREEN);
mEditText2.setBackgroundColor(Color.GREEN);
mEditText3.setBackgroundColor(Color.RED);
mButton = (Button) findViewById(R.id.button1);
mButton.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
//When the button is clicked, call the calucate method.
// calculate();
try {
value1 = Double.parseDouble(mEditText1.getText().toString());
value2 = Double.parseDouble(mEditText2.getText().toString());
sq1 = new SquareArea(value1, value2);
mTextView.setText(sq1.toString());
} catch (NumberFormatException e) {
mTextView.setText("Please use numbers");
}
});
}
}
You declare area() private, so cannot you call it
public double area(){
return _length
}
and you just have to call your area()
mTextView.setText(String.ValueOf(sq1.area()));
I see several problems
mTextView.setText(sq1.toString());
The toString method in SquareArea is not overridden. So the toString will return the default information about the object (location in memory, name, etc.)
public SquareArea(double length , double width){
_length = length;
_width = width;
area();
}
In the code above, you are inside the constructor. Why are you calling area() from here? A constructor can't return anything and the result from area() is being lost because area() returns a double.
And lastly:
private double area(){
return _length
}
This method is private. It cannot be called from outside the class/object.
To make your code work this is what I would change.
public class SquareArea{
private double _length;
private double _width;
public SquareArea(double length , double width){
_length = length;
_width = width;
}
public double area(){
return _length * _width;
}
}
///Below is my MainActivity Class///
public class MainActivity extends Activity {
EditText mEditText1;
EditText mEditText2;
EditText mEditText3;
TextView mTextView;
Button mButton;
Double value1, value2;
SquareArea sq1;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mEditText1 = (EditText) findViewById(R.id.editText1);
mEditText2 = (EditText) findViewById(R.id.editText2);
mEditText3 = (EditText) findViewById(R.id.editText3);
mTextView = (TextView) findViewById(R.id.textView1);
mEditText1.setBackgroundColor(Color.GREEN);
mEditText2.setBackgroundColor(Color.GREEN);
mEditText3.setBackgroundColor(Color.RED);
mButton = (Button) findViewById(R.id.button1);
mButton.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
//When the button is clicked, call the calucate method.
// calculate();
try {
value1 = Double.parseDouble(mEditText1.getText().toString());
value2 = Double.parseDouble(mEditText2.getText().toString());
sq1 = new SquareArea(value1, value2);
mTextView.setText(String.ValueOf(sq1.area()));
} catch (NumberFormatException e) {
mTextView.setText("Please use numbers");
}
});
}
}
Related
This question already has answers here:
What is a NullPointerException, and how do I fix it?
(12 answers)
Closed 5 years ago.
package com.example.teopeishen.test2;
import android.content.Intent;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
public class First extends AppCompatActivity {
public Button but;
public void change(){
but = (Button) findViewById(R.id.buttonGenerate);
View.OnClickListener click = new View.OnClickListener(){
#Override
public void onClick (View v){
Intent calc = new Intent (First.this,Second.class);
startActivity(calc);
Bundle bundle = new Bundle();
bundle.putString("testName",testName.getText().toString());
bundle.putDouble("writeMark3",writeMark3);
bundle.putDouble("speakMark3",speakMark3);
bundle.putDouble("listenMark3",listenMark3);
bundle.putDouble("finalMark3",finalMark3);
Intent intent = new Intent(First.this,Second.class);
intent.putExtras(bundle);
startActivity(intent);
}
};
but.setOnClickListener(click);
}
private EditText testName;
private EditText writeMark;
private EditText speakMark;
private EditText listenMark;
private Double writeMark2;
private Double speakMark2;
private Double listenMark2;
private Double writeMark3;
private Double speakMark3;
private Double listenMark3;
private Double finalMark3;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_first);
testName = (EditText) findViewById(R.id.editTextName);
writeMark = (EditText) findViewById(R.id.editTextWrite);
speakMark = (EditText) findViewById(R.id.editTextSpeak);
listenMark = (EditText) findViewById(R.id.editTextListen);
try {
writeMark2 = Double.valueOf(writeMark.getText().toString());
speakMark2 = Double.valueOf(speakMark.getText().toString());
listenMark2 = Double.valueOf(listenMark.getText().toString());
writeMark3 = writeMark2 / 100 * 50;
speakMark3 = speakMark2 / 100 * 30;
listenMark3 = listenMark2 / 100 * 20;
finalMark3 = writeMark3 + speakMark3 + listenMark3;
} catch (Exception e) {
finalMark3 = 0.0;
}
change();
}
}
I try to addextra bundle and but get and error of
java.lang.NullPointerException: Attempt to invoke virtual method
'double java.lang.Double.doubleValue()' on a null object reference
at com.example.teopeishen.test2.First$1.onClick(First.java:23). What
it means? Anyone know about it. It say the problem is within line 23
which is bundle.putDouble("writeMark3",writeMark3);
writeMark3 is null but that is not the biggest problem you have. In fact, you have quite a few of them.
any EditText input after onCreate is ignored
the try-catch in onCreate is causing most of your relevant variables to be null (including writeMark3)
the Bundle in onClick is not used at all, you start an activity with an empty Intent and then initialize the Bundle you should've sent with that Intent
Providing a complex answer would mean explaining programming basics to you so maybe this is not a good place to start acquiring programming skills.
Change your First class Activity like this
public class First extends AppCompatActivity {
private EditText testName;
private EditText writeMark;
private EditText speakMark;
private EditText listenMark;
private Double writeMark2;
private Double speakMark2;
private Double listenMark2;
private Double writeMark3;
private Double speakMark3;
private Double listenMark3;
private Double finalMark3;
public Button but;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_first);
testName = (EditText) findViewById(R.id.editTextName);
writeMark = (EditText) findViewById(R.id.editTextWrite);
speakMark = (EditText) findViewById(R.id.editTextSpeak);
listenMark = (EditText) findViewById(R.id.editTextListen);
but = (Button) findViewById(R.id.buttonGenerate);
but.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
getValues();
Bundle bundle = new Bundle();
bundle.putString("testName", testName.getText().toString());
bundle.putDouble("writeMark3", writeMark3);
bundle.putDouble("speakMark3", speakMark3);
bundle.putDouble("listenMark3", listenMark3);
bundle.putDouble("finalMark3", finalMark3);
Intent intent = new Intent(First.this, Second.class);
intent.putExtras(bundle);
startActivity(intent);
}
});
}
public void getValues() {
try {
writeMark2 = Double.valueOf(writeMark.getText().toString());
speakMark2 = Double.valueOf(speakMark.getText().toString());
listenMark2 = Double.valueOf(listenMark.getText().toString());
writeMark3 = writeMark2 / 100 * 50;
speakMark3 = speakMark2 / 100 * 30;
listenMark3 = listenMark2 / 100 * 20;
finalMark3 = writeMark3 + speakMark3 + listenMark3;
} catch (Exception e) {
finalMark3 = 0.0;
}
}
}
Changes made are:
1.You are computing the editText value initially and not at the time of button click,so the values were not getting updated.
2.Bundle value was not used as you were calling intent two times inside onclick function.
This question already has answers here:
OnClickListener in Android Studio
(5 answers)
Closed 6 years ago.
I am new to android studio and tried a tutorial where the presenter demonstrated his program but when I type out the code I am persistently getting an error like Cannot resolve Symbol setOnClickListener where the setOnClickListener is highlighted in red.
TextView Resultant = (TextView) findViewById(R.id.Resultant);
EditText Percentage_Input = (EditText) findViewById(R.id.Percentage_Input);
EditText Number_Input = (EditText) findViewById(R.id.Percentage_Input);
#Override
public View findViewById(#IdRes int id) {
return super.findViewById(R.id.Percentage_Input);
}
Button calc_btn = (Button) findViewById(R.id.calc_btn);
calc_btn.setOnClickListener(new View.OnClickListener(){
public void onClick((View) view); {
float percent = Float.parseFloat(Percentage_Input.getText().toString());
float dec = percent/100;
float Qty = Float.parseFloat(Number_Input.getText().toString());
float total = dec*Qty;
Resultant.setText(Float.toString(total));
}
})
I think your code is not in the right place. I see you are overriding findViewById (I wonder why) and rest of your code is also at the same level. You need to put all this code within a lifecycle method.
Maybe in onCreate()
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
TextView Resultant = (TextView) findViewById(R.id.Resultant);
EditText Percentage_Input = (EditText) findViewById(R.id.Percentage_Input);
EditText Number_Input = (EditText) findViewById(R.id.Percentage_Input);
Button calc_btn = (Button) findViewById(R.id.calc_btn);
calc_btn.setOnClickListener(new View.OnClickListener() {
public void onClick((View) view); {
float percent = Float.parseFloat(Percentage_Input.getText().toString());
float dec = percent / 100;
float Qty = Float.parseFloat(Number_Input.getText().toString());
float total = dec * Qty;
Resultant.setText(Float.toString(total));
}
});
}
Also you are missing a semicolon ; at the end of setting OnClickListener.
Move ; and put at the end, this:
TextView Resultant = (TextView) findViewById(R.id.Resultant);
EditText Percentage_Input = (EditText) findViewById(R.id.Percentage_Input);
EditText Number_Input = (EditText) findViewById(R.id.Percentage_Input);
#Override
public View findViewById(#IdRes int id) {
return super.findViewById(R.id.Percentage_Input);
}
Button calc_btn = (Button) findViewById(R.id.calc_btn);
calc_btn.setOnClickListener(new View.OnClickListener(){
public void onClick((View) view) {
float percent = Float.parseFloat(Percentage_Input.getText().toString());
float dec = percent/100;
float Qty = Float.parseFloat(Number_Input.getText().toString());
float total = dec*Qty;
Resultant.setText(Float.toString(total));
}
});
Remove you method findViewById, this is some weird stuff, returning always the same view.
Put the rest of your code inside onCreate and add the missing ; at the end.
So , I was not making my self clear. I'm having a little trouble trying to get a button index from a matrix.
I have this matrix bt[4][4], and each button has a value like this :
btn11 = bt[0][0].
Now what I want to do is, whenever I click on a Button, I get it´s "cordinates".
Ex: Bt11 would give [0] and [0] .
Now the problems that I'm having:
I've set listeners to each button, but I can't implement a "onClick" method.
Whenever I try to implement here "public class easy extends Activity" I get an error message.
Second problem, I don't know to get the cordinates from bt[x][y].
To sum it up. I want to set a onClick method so every time you click on a button you get it's [x][y] cordinates.
Here's my code:
public class easy extends Activity { //Can't implement OnClick Listener
Button bt[][] = new Button[4][4];
Button up;
Button down;
Button left;
Button right;
int listaTroca[] = new int[10]; // lista pra receber os valores de retorno da logica
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_easy);
//Linha 1
bt[0][0] = (Button) findViewById(R.id.bt11);
bt[0][0].setOnClickListener((View.OnClickListener) this);
bt[0][1] = (Button) findViewById(R.id.bt12);
bt[0][1].setOnClickListener((View.OnClickListener) this);
bt[0][2] = (Button) findViewById(R.id.bt13);
bt[0][2].setOnClickListener((View.OnClickListener) this);
bt[0][3] = (Button) findViewById(R.id.bt14);
bt[0][3].setOnClickListener((View.OnClickListener) this);
//--------------------- Linha 2
bt[1][0] = (Button) findViewById(R.id.bt21);
bt[1][0].setOnClickListener((View.OnClickListener) this);
bt[1][1] = (Button) findViewById(R.id.bt22);
bt[1][1].setOnClickListener((View.OnClickListener) this);
bt[1][2] = (Button) findViewById(R.id.bt23);
bt[1][2].setOnClickListener((View.OnClickListener) this);
bt[1][3] = (Button) findViewById(R.id.bt24);
bt[1][3].setOnClickListener((View.OnClickListener) this);
//------------------------Linha 3
bt[2][0] = (Button) findViewById(R.id.bt31);
bt[2][0].setOnClickListener((View.OnClickListener) this);
bt[2][1] = (Button) findViewById(R.id.bt32);
bt[2][1].setOnClickListener((View.OnClickListener) this);
bt[2][2] = (Button) findViewById(R.id.bt33);
bt[2][2].setOnClickListener((View.OnClickListener) this);
bt[2][3] = (Button) findViewById(R.id.bt34);
bt[2][3].setOnClickListener((View.OnClickListener) this);
//---------------------Linha 4
bt[3][0] = (Button) findViewById(R.id.bt41);
bt[3][0].setOnClickListener((View.OnClickListener) this);
bt[3][1] = (Button) findViewById(R.id.bt42);
bt[3][1].setOnClickListener((View.OnClickListener) this);
bt[3][2] = (Button) findViewById(R.id.bt43);
bt[3][2].setOnClickListener((View.OnClickListener) this);
bt[3][3] = (Button) findViewById(R.id.bt44);
bt[3][3].setOnClickListener((View.OnClickListener) this);
//----------------------FIM DECLARAÇÃO + OUVIDOS
listaTroca = Logic.Logic_main(1,1,1);
}
}
I'm not completely sure what your question is here, but from what i understand you want a View.OnClickListener() on each button, and when the button is being clicked you want to do something right?
EDITED: I've edited the answer as the question was clarified in the comments below.
What you want to do, is simply iterate your bt[][] to find the right button, like so:
public class Easy extends Activity {
Button[][] bt = new Button[4][4];
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_easy);
//Linha 1
bt[0][0] = (Button) findViewById(R.id.bt11);
bt[0][0].setOnClickListener(mOnClickListener);
bt[0][1] = (Button) findViewById(R.id.bt12);
bt[0][1].setOnClickListener(mOnClickListener);
// ADD YOUR OTHER findViewByID
}
View.OnClickListener mOnClickListener = new View.OnClickListener() {
#Override
public void onClick(View v) {
ButtonCoordinate bc = getButtonCoordinate(v);
if (bc != null) {
// You now have your button, and the coordinates
Log.d("Easy", "Button.position[ x:" + bc.x + ", y:" + bc.y + " ]");
}
}
};
private ButtonCoordinate getButtonCoordinate(View v) {
for (int x = 0 ; x < bt.length ; x++ ) {
for (int y = 0 ; y < bt[x].length ; y++) {
Button b = bt[x][y];
if (v == b) {
return new ButtonCoordinate(x, y, b);
}
}
}
return null;
}
public static class ButtonCoordinate {
public final int x;
public final int y;
public final Button button;
public ButtonCoordinate(int x, int y, Button button) {
this.x = x;
this.y = y;
this.button = button;
}
}
}
you just need to call getButtonCoordinate(View) which will return a ButtonCoordinate containing the Button and it's x and y coordinates in the bt[][]
I have a problem. I do not know how to call a different class. the code is for a button (when you click the button a message appears in random) so i thought it would be better if i placed it in a different class as i have also used arrays.Now i do not know how to call the class.
This is my code.I want to call "Firstin" inside SecondActivity.
public class SecondActivity extends Activity {
private Firstin mFirst = new Firstin ();
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_second);
//finds textview
final Text Ftext = (Text) findViewById(R.id.textView2);
#SuppressWarnings("unused")
final Text Stext = (Text) findViewById(R.id.textView3);
//finds button view
Button btnView = (Button) findViewById(R.id.button1);
#SuppressWarnings("unused")
Button btnView2 = (Button) findViewById(R.id.button2);
btnView.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
String Answer = mFirst.firstAnswer();
Ftext.setTextContent(Answer);
}
});
this is the class I'm trying to call:
package com.example.insultgenerator;
import java.util.Random;
public class Firstin {
public String firstAnswer(){
String [] mResults={
"its cool",
"we cool",
"im cool",
"he cool",
"she cool"
};
// the button was clicked so replace the answer label with answer
String Answer = "" ;
// the two double is a 'empty string
Random RandomGen = new Random();// telling the program to construct a random generator
int RandomNum= RandomGen.nextInt(mResults.length);
Answer = mResults[RandomNum];
return(Answer);
}
}
You should cast to TextView
final TextViewFtext = (TextView) findViewById(R.id.textView2);
#SuppressWarnings("unused")
final TextViewStext = (TextView) findViewById(R.id.textView3);
then use TextView.setText(...) method:
String Answer = mFirst.firstAnswer();
Ftext.setText(new Firstin().firstAnswer());
}
});
then last call the method from the other class with new Firstin().firstAnswer() which creates a instance of the class and executes the method.
I am learning how to create UI elements. I have created a few EditText input fields. On the click of a Button I want to capture the content typed into that input field.
<EditText android:id="#+id/name" android:width="220px" />
That's my field. How can I get the content?
By using getText():
Button mButton;
EditText mEdit;
/** Called when the activity is first created. */
#Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
mButton = (Button)findViewById(R.id.button);
mEdit = (EditText)findViewById(R.id.edittext);
mButton.setOnClickListener(
new View.OnClickListener()
{
public void onClick(View view)
{
Log.v("EditText", mEdit.getText().toString());
}
});
}
Get value from an EditText control in android. EditText getText property use to get value an EditText:
EditText txtname = findViewById(R.id.name);
String name = txtname.getText().toString();
I guess you will have to use this code when calling the "mEdit" your EditText object :
myActivity.this.mEdit.getText().toString()
Just make sure that the compiler know which EditText to call and use.
I hope this one should work:
Integer.valueOf(mEdit.getText().toString());
I tried Integer.getInteger() method instead of valueOf() - it didn't work.
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
Button rtn = (Button)findViewById(R.id.button);
EditText edit_text = (EditText)findViewById(R.id.edittext1);
rtn .setOnClickListener(
new View.OnClickListener()
{
public void onClick(View view)
{
Log.v("EditText value=", edit_text.getText().toString());
}
});
}
You might also want to take a look at Butter Knife. It aims at reducing the amount of boilerplate code by using annotation. Here is a simple example:
public class ExampleActivity extends ActionBarActivity {
#InjectView(R.id.name)
EditText nameEditText;
#InjectView(R.id.email)
EditText emailEditText;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_example);
Butterknife.inject(this);
}
#OnClick(R.id.submit)
public void onSubmit() {
Editable name = nameEditText.getText();
Editable email = emailEditText.getText();
}
}
Just add the following dependency to your build.gradle:
compile 'com.jakewharton:butterknife:x.y.z'
As an alternative there is also AndroidAnnotations.
Shortest & Simplest
getText(editText);
getText(button);
getText(textView);
Little Workaround
Just make method in your BaseActivity / create BaseActivity if you don't have.
public class BaseActivity extends AppCompatActivity{
public String getText(TextView tv) {
return tv.getText().toString().trim();
}
}
And extend your all activities by this BaseActivity.
public class YourActivity extends BaseActivity {
#Override
public void onCreate(Bundle savedInstanceState){
getText(editText);
getText(button);
getText(textView);
}
}
Note that EditText, Button extends TextView, so I created only getText(TextView tv).
String value = YourEditText.getText().toString;
A more advanced way would be to use butterknife bindview. This eliminates redundant code.
In your gradle under dependencies; add this 2 lines.
compile('com.jakewharton:butterknife:8.5.1') {
exclude module: 'support-compat'
}
apt 'com.jakewharton:butterknife-compiler:8.5.1'
Then sync up.
Example binding edittext in MainActivity
import butterknife.BindView;
import butterknife.ButterKnife;
public class MainActivity {
#BindView(R.id.name) EditTextView mName;
...
public void onCreate(Bundle savedInstanceState){
ButterKnife.bind(this);
...
}
}
But this is an alternative once you feel more comfortable or starting to work with lots of data.
step 1 : create layout with name activity_main.xml
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="#+id/rl"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:padding="10dp"
tools:context=".MainActivity"
android:background="#c6cabd"
>
<TextView
android:id="#+id/tv"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textSize="17dp"
android:textColor="#ff0e13"
/>
<EditText
android:id="#+id/et"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="#id/tv"
android:hint="Input your country"
/>
<Button
android:id="#+id/btn"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Get EditText Text"
android:layout_below="#id/et"
/>
</RelativeLayout>
Step 2 : Create class Main.class
public class Main extends Activity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Button btn = (Button) findViewById(R.id.btn);
final TextView tv = (TextView) findViewById(R.id.tv);
final EditText et = (EditText) findViewById(R.id.et);
btn.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
String country = et.getText().toString();
tv.setText("Your inputted country is : " + country);
}
});
}
}
If you are using Kotlin and wants to make it generic you can use the Extension function
Extension function:
fun EditText.getTextString(): String {
this.text.toString()
}
and call this method directly from your EditText
yourEditText.getTextString()
Try this code
final EditText editText = findViewById(R.id.name); // your edittext id in xml
Button submit = findViewById(R.id.submit_button); // your button id in xml
submit.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v)
{
String string = editText.getText().toString();
Toast.makeText(MainActivity.this, string, Toast.LENGTH_SHORT).show();
}
});
Button kapatButon = (Button) findViewById(R.id.islemButonKapat);
Button hesaplaButon = (Button) findViewById(R.id.islemButonHesapla);
Button ayarlarButon = (Button) findViewById(R.id.islemButonAyarlar);
final EditText ders1Vize = (EditText) findViewById(R.id.ders1Vize);
final EditText ders1Final = (EditText) findViewById(R.id.ders1Final);
final EditText ders1Ortalama = (EditText) findViewById(R.id.ders1Ortalama);
//
final EditText ders2Vize = (EditText) findViewById(R.id.ders2Vize);
final EditText ders2Final = (EditText) findViewById(R.id.ders2Final);
final EditText ders2Ortalama = (EditText) findViewById(R.id.ders2Ortalama);
//
final EditText ders3Vize = (EditText) findViewById(R.id.ders3Vize);
final EditText ders3Final = (EditText) findViewById(R.id.ders3Final);
final EditText ders3Ortalama = (EditText) findViewById(R.id.ders3Ortalama);
//
final EditText ders4Vize = (EditText) findViewById(R.id.ders4Vize);
final EditText ders4Final = (EditText) findViewById(R.id.ders4Final);
final EditText ders4Ortalama = (EditText) findViewById(R.id.ders4Ortalama);
//
final EditText ders5Vize = (EditText) findViewById(R.id.ders5Vize);
final EditText ders5Final = (EditText) findViewById(R.id.ders5Final);
final EditText ders5Ortalama = (EditText) findViewById(R.id.ders5Ortalama);
//
final EditText ders6Vize = (EditText) findViewById(R.id.ders6Vize);
final EditText ders6Final = (EditText) findViewById(R.id.ders6Final);
final EditText ders6Ortalama = (EditText) findViewById(R.id.ders6Ortalama);
//
final EditText ders7Vize = (EditText) findViewById(R.id.ders7Vize);
final EditText ders7Final = (EditText) findViewById(R.id.ders7Final);
final EditText ders7Ortalama = (EditText) findViewById(R.id.ders7Ortalama);
//
/*
*
*
* */
kapatButon.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
// kapatma islemi
Toast.makeText(getApplicationContext(), "kapat",
Toast.LENGTH_LONG).show();
}
});
/*
*
*
* */
hesaplaButon.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
// hesap islemi
int d1v = Integer.parseInt(ders1Vize.getText().toString());
int d1f = Integer.parseInt(ders1Final.getText().toString());
int ort1 = (int) (d1v * 0.4 + d1f * 0.6);
ders1Ortalama.setText("" + ort1);
//
int d2v = Integer.parseInt(ders2Vize.getText().toString());
int d2f = Integer.parseInt(ders2Final.getText().toString());
int ort2 = (int) (d2v * 0.4 + d2f * 0.6);
ders2Ortalama.setText("" + ort2);
//
int d3v = Integer.parseInt(ders3Vize.getText().toString());
int d3f = Integer.parseInt(ders3Final.getText().toString());
int ort3 = (int) (d3v * 0.4 + d3f * 0.6);
ders3Ortalama.setText("" + ort3);
//
int d4v = Integer.parseInt(ders4Vize.getText().toString());
int d4f = Integer.parseInt(ders4Final.getText().toString());
int ort4 = (int) (d4v * 0.4 + d4f * 0.6);
ders4Ortalama.setText("" + ort4);
//
int d5v = Integer.parseInt(ders5Vize.getText().toString());
int d5f = Integer.parseInt(ders5Final.getText().toString());
int ort5 = (int) (d5v * 0.4 + d5f * 0.6);
ders5Ortalama.setText("" + ort5);
//
int d6v = Integer.parseInt(ders6Vize.getText().toString());
int d6f = Integer.parseInt(ders6Final.getText().toString());
int ort6 = (int) (d6v * 0.4 + d6f * 0.6);
ders6Ortalama.setText("" + ort6);
//
int d7v = Integer.parseInt(ders7Vize.getText().toString());
int d7f = Integer.parseInt(ders7Final.getText().toString());
int ort7 = (int) (d7v * 0.4 + d7f * 0.6);
ders7Ortalama.setText("" + ort7);
//
Toast.makeText(getApplicationContext(), "hesapla",
Toast.LENGTH_LONG).show();
}
});