thoerup/calculator/CalculatorActivity.java

package dk.thoerup.calculator;

import android.app.Activity;
import android.os.Bundle;
import android.text.Editable;
import android.view.View;
import android.widget.EditText;

public class CalculatorActivity extends Activity {
        enum Ops {
                None,
                Addition,
                Subtraction,
                Multiplication,
                Division
        }
        
        
        EditText mEdit;
        
        
        double mVal1;
        Ops mOperation = Ops.None;
        boolean mClear = false;
                
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        
        findViewById(R.id.btn0).setOnClickListener( new NumericClick('0') );
        findViewById(R.id.btn1).setOnClickListener( new NumericClick('1') );
        findViewById(R.id.btn2).setOnClickListener( new NumericClick('2') );
        findViewById(R.id.btn3).setOnClickListener( new NumericClick('3') );
        findViewById(R.id.btn4).setOnClickListener( new NumericClick('4') );
        findViewById(R.id.btn5).setOnClickListener( new NumericClick('5') );
        findViewById(R.id.btn6).setOnClickListener( new NumericClick('6') );
        findViewById(R.id.btn7).setOnClickListener( new NumericClick('7') );
        findViewById(R.id.btn8).setOnClickListener( new NumericClick('8') );
        findViewById(R.id.btn9).setOnClickListener( new NumericClick('9') );
     
        findViewById(R.id.btnback).setOnClickListener( new BackClick() );
        findViewById(R.id.btnpoint).setOnClickListener( new PointClick() );
        
        findViewById(R.id.btnadd).setOnClickListener( new OperationClick(Ops.Addition) );
        findViewById(R.id.btnsub).setOnClickListener( new OperationClick(Ops.Subtraction) );
        findViewById(R.id.btnmul).setOnClickListener( new OperationClick(Ops.Multiplication) );
        findViewById(R.id.btndiv).setOnClickListener( new OperationClick(Ops.Division) );
        
        findViewById(R.id.btnsum).setOnClickListener( new SumClick() );
        
        mEdit = (EditText) findViewById(R.id.edit);
        mEdit.setCursorVisible(false);
       
        
    }
    
    
    class NumericClick implements View.OnClickListener {
        char mNumval;

        public NumericClick(char numval) {
                mNumval = numval;
        }
        
                @Override
                public void onClick(View v) {
                        Editable tempText = mEdit.getText();
                        
                        if (tempText.toString().equals("0") || mClear==true ) {
                                mClear=false;
                                tempText.clear();
                        }
                        tempText.append(mNumval);                       
                }
        
    }
    
    class BackClick implements View.OnClickListener {

                @Override
                public void onClick(View v) {
                        if (mClear) {
                                mClear = false;
                                mEdit.setText("0");
                                return;
                        }
                        
                        Editable tempText = mEdit.getText();
                        if (tempText.length() > 0) {
                                CharSequence cs = tempText.subSequence(0, tempText.length() -1);
                                mEdit.setText(cs);
                        }
                }
    }
    
    class PointClick implements View.OnClickListener {

                @Override
                public void onClick(View v) {                   
                        
                        Editable tempText = mEdit.getText();
                        if (tempText.toString().indexOf('.') == -1) {
                                tempText.append('.');
                        }
                }
    }
    
    class OperationClick implements View.OnClickListener {
        Ops mOp;
        public OperationClick(Ops op) {
                mOp = op;
        }

                @Override
                public void onClick(View v) {                   
                        mVal1 = Double.parseDouble( mEdit.getText().toString() );
                        mEdit.setText("0");
                        
                        mOperation = mOp;
                        
                }
    }
    
    class SumClick implements View.OnClickListener {
                @Override
                public void onClick(View v) {
                        if (mOperation == Ops.None) {
                                return;
                        }                       
                        
                        double val2 = Double.parseDouble( mEdit.getText().toString() );

                        Double res = 0.0;
                        switch (mOperation) {
                        case Addition:
                                res = mVal1 + val2;
                                break;
                        case Subtraction:
                                res = mVal1 - val2;
                                break;
                        case Multiplication:
                                res = mVal1 * val2;
                                break;
                        case Division:
                                res = mVal1 / val2;
                                break;                          
                        }
                        
                        if ( res.isInfinite() || res.isNaN() ) {
                                mClear = true;
                        }
                        
                        mEdit.setText( res.toString() );
                        mOperation = Ops.None;
                        mVal1 = res;
                }
    }    
}
1	torben	931	package dk.thoerup.calculator;
2
3			import android.app.Activity;
4			import android.os.Bundle;
5			import android.text.Editable;
6			import android.view.View;
7			import android.widget.EditText;
8
9			public class CalculatorActivity extends Activity {
10	torben	936	enum Ops {
11			None,
12			Addition,
13			Subtraction,
14			Multiplication,
15			Division
16			}
17	torben	931
18	torben	936
19	torben	931	EditText mEdit;
20
21
22			double mVal1;
23	torben	936	Ops mOperation = Ops.None;
24	torben	931	boolean mClear = false;
25
26			@Override
27			public void onCreate(Bundle savedInstanceState) {
28			super.onCreate(savedInstanceState);
29			setContentView(R.layout.main);
30
31			findViewById(R.id.btn0).setOnClickListener( new NumericClick('0') );
32			findViewById(R.id.btn1).setOnClickListener( new NumericClick('1') );
33			findViewById(R.id.btn2).setOnClickListener( new NumericClick('2') );
34			findViewById(R.id.btn3).setOnClickListener( new NumericClick('3') );
35			findViewById(R.id.btn4).setOnClickListener( new NumericClick('4') );
36			findViewById(R.id.btn5).setOnClickListener( new NumericClick('5') );
37			findViewById(R.id.btn6).setOnClickListener( new NumericClick('6') );
38			findViewById(R.id.btn7).setOnClickListener( new NumericClick('7') );
39			findViewById(R.id.btn8).setOnClickListener( new NumericClick('8') );
40			findViewById(R.id.btn9).setOnClickListener( new NumericClick('9') );
41
42			findViewById(R.id.btnback).setOnClickListener( new BackClick() );
43			findViewById(R.id.btnpoint).setOnClickListener( new PointClick() );
44
45	torben	936	findViewById(R.id.btnadd).setOnClickListener( new OperationClick(Ops.Addition) );
46			findViewById(R.id.btnsub).setOnClickListener( new OperationClick(Ops.Subtraction) );
47			findViewById(R.id.btnmul).setOnClickListener( new OperationClick(Ops.Multiplication) );
48			findViewById(R.id.btndiv).setOnClickListener( new OperationClick(Ops.Division) );
49	torben	931
50			findViewById(R.id.btnsum).setOnClickListener( new SumClick() );
51
52			mEdit = (EditText) findViewById(R.id.edit);
53			mEdit.setCursorVisible(false);
54
55
56			}
57
58
59			class NumericClick implements View.OnClickListener {
60			char mNumval;
61
62			public NumericClick(char numval) {
63			mNumval = numval;
64			}
65
66			@Override
67			public void onClick(View v) {
68			Editable tempText = mEdit.getText();
69
70			if (tempText.toString().equals("0") \|\| mClear==true ) {
71	torben	935	mClear=false;
72	torben	931	tempText.clear();
73			}
74			tempText.append(mNumval);
75			}
76
77			}
78
79			class BackClick implements View.OnClickListener {
80
81			@Override
82			public void onClick(View v) {
83			if (mClear) {
84	torben	933	mClear = false;
85	torben	931	mEdit.setText("0");
86			return;
87			}
88
89			Editable tempText = mEdit.getText();
90			if (tempText.length() > 0) {
91			CharSequence cs = tempText.subSequence(0, tempText.length() -1);
92			mEdit.setText(cs);
93			}
94			}
95			}
96
97			class PointClick implements View.OnClickListener {
98
99			@Override
100			public void onClick(View v) {
101
102			Editable tempText = mEdit.getText();
103			if (tempText.toString().indexOf('.') == -1) {
104			tempText.append('.');
105			}
106			}
107			}
108
109			class OperationClick implements View.OnClickListener {
110	torben	936	Ops mOp;
111			public OperationClick(Ops op) {
112	torben	931	mOp = op;
113			}
114
115			@Override
116			public void onClick(View v) {
117			mVal1 = Double.parseDouble( mEdit.getText().toString() );
118			mEdit.setText("0");
119
120			mOperation = mOp;
121
122			}
123			}
124
125			class SumClick implements View.OnClickListener {
126			@Override
127			public void onClick(View v) {
128	torben	936	if (mOperation == Ops.None) {
129	torben	931	return;
130			}
131
132			double val2 = Double.parseDouble( mEdit.getText().toString() );
133
134			Double res = 0.0;
135			switch (mOperation) {
136	torben	936	case Addition:
137	torben	931	res = mVal1 + val2;
138			break;
139	torben	936	case Subtraction:
140	torben	931	res = mVal1 - val2;
141			break;
142	torben	936	case Multiplication:
143	torben	931	res = mVal1 * val2;
144			break;
145	torben	936	case Division:
146	torben	931	res = mVal1 / val2;
147			break;
148			}
149
150			if ( res.isInfinite() \|\| res.isNaN() ) {
151			mClear = true;
152			}
153
154			mEdit.setText( res.toString() );
155	torben	936	mOperation = Ops.None;
156	torben	931	mVal1 = res;
157			}
158			}
159			}