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POaddition in my android calculator doesn't work fully
 

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  1. POaddition in my android calculator doesn't work fully
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    <p>I have made an android calculator. Though it isn't completely as a normal calculator. In normal calculators, when we add up two numbers, suppose 5+5 and we click any of these, /*-+=, the number sums up and the new arithmetic logic is implemented on the result. Though it doesn't work for me. Can someone please tell me what changes shall I make in my code? Thank you. :)</p> <pre><code>package com.example.asd; import android.os.Bundle; import android.app.Activity; import android.graphics.Typeface; import android.view.Menu; import android.view.View; import android.widget.Button; import android.widget.EditText; import android.widget.TextView; import android.view.Window; import android.view.View.OnClickListener; public class MainActivity extends Activity { Typeface font1, font2; TextView tv1; private EditText Scr; //textbox screen private float NumberBf; //Save screen before pressing button operation; private String Operation; private ButtonClickListener btnClick; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); requestWindowFeature(Window.FEATURE_NO_TITLE); setContentView(R.layout.activity_main); font1=Typeface.createFromAsset(getAssets(), "digits.ttf"); Scr=(EditText)findViewById(R.id.editText); Scr.setTypeface(font1); font2=Typeface.createFromAsset(getAssets(), "alexbrush.TTF"); tv1=(TextView)findViewById(R.id.textView1); tv1.setTypeface(font2); Scr = (EditText) findViewById(R.id.editText); Scr.setEnabled(false); btnClick = new ButtonClickListener(); int idList[] = {R.id.button0,R.id.button7, R.id.button1, R.id.button8,R.id.button9,R.id.button4, R.id.button5,R.id.button6,R.id.button,R.id.button2,R.id.button3,R.id.buttonDot, R.id.buttonMul,R.id.buttonDiv,R.id.buttonAdd,R.id.buttonSub,R.id.buttonC, R.id.buttonEq, R.id.buttonSqrt, R.id.buttonsquare, R.id.buttonNp }; for(int id:idList){ View v = (View) findViewById(id); v.setOnClickListener(btnClick); } } @Override public boolean onCreateOptionsMenu(Menu menu) { // Inflate the menu; this adds items to the action bar if it is present. getMenuInflater().inflate(R.menu.main, menu); return true; } public void mMath(String str){ NumberBf = Float.parseFloat(Scr.getText().toString()); //save the screen Operation = str; //save operation Scr.setText("0"); //Clear screen } public void getKeyboard(String str){ String ScrCurrent = Scr.getText().toString(); if(ScrCurrent.equals("0")) ScrCurrent = ""; ScrCurrent += str; Scr.setText(ScrCurrent); } public void mResult(){ float NumAf = Float.parseFloat(Scr.getText().toString()); float result = 0; if(Operation.equals("+")){ result = NumAf + NumberBf; } if(Operation.equals("-")){ result = NumberBf - NumAf; } if(Operation.equals("*")){ result = NumAf * NumberBf; } if(Operation.equals("/")){ result = NumberBf / NumAf; } Scr.setText(String.format("%10d", result)); } public void fnSqrt(){ double Number = Double.parseDouble(Scr.getText().toString()); Number = Math.sqrt(Number); Scr.setText(String.valueOf(Number)); } public void fnSquare(){ float Number1 = Float.parseFloat(Scr.getText().toString()); Number1 = pow(Number1, 2); Scr.setText(String.valueOf(Number1)); } public void fnNp(){ float Number = Float.parseFloat(Scr.getText().toString()); Number = Number*(-1); Scr.setText(String.valueOf(Number)); } //new class ButtonClickListener private float pow(float number1, int i) { // TODO Auto-generated method stub return number1*number1; } private class ButtonClickListener implements OnClickListener{ public void onClick(View v){ switch (v.getId()){ case R.id.buttonC: //Clear screen Scr.setText("0"); NumberBf = 0; Operation = ""; break; case R.id.buttonAdd: //function Add mMath("+"); break; case R.id.buttonSub: mMath("-"); break; case R.id.buttonMul: mMath("*"); break; case R.id.buttonDiv: mMath("/"); break; case R.id.buttonEq: mResult(); break; case R.id.buttonSqrt: fnSqrt(); break; case R.id.buttonNp: fnNp(); break; case R.id.buttonsquare: fnSquare(); break; default: String numb = ((Button) v).getText().toString(); getKeyboard(numb); break; } } } </code></pre> <p>}</p>
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    1. USAijaz
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    1. CO"it doesn't work for me" -- this is not a very useful description of your symptoms. Please edit your question to explain **completely and precisely** what this means. You may wish to consider reading other StackOverflow questions to see what sorts of information is needed in order to get assistance.
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      1. USCommonsWare
 

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