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 {
    /** Called when the activity is first created. */
        
        EditText mEdit;
        
        
        double mVal1;
        char mOperation = ' ';
        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('+') );
        findViewById(R.id.btnsub).setOnClickListener( new OperationClick('-') );
        findViewById(R.id.btnmul).setOnClickListener( new OperationClick('*') );
        findViewById(R.id.btndiv).setOnClickListener( new OperationClick('/') );
        
        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 {
        char mOp;
        public OperationClick(char 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 == ' ') {
                                return;
                        }                       
                        
                        double val2 = Double.parseDouble( mEdit.getText().toString() );

                        Double res = 0.0;
                        switch (mOperation) {
                        case '+':
                                res = mVal1 + val2;
                                break;
                        case '-':
                                res = mVal1 - val2;
                                break;
                        case '*':
                                res = mVal1 * val2;
                                break;
                        case '/':
                                res = mVal1 / val2;
                                break;                          
                        }
                        
                        if ( res.isInfinite() || res.isNaN() ) {
                                mClear = true;
                        }
                        
                        mEdit.setText( res.toString() );
                        mOperation = ' ';
                        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			/** Called when the activity is first created. */
11
12			EditText mEdit;
13
14
15			double mVal1;
16			char mOperation = ' ';
17			boolean mClear = false;
18
19			@Override
20			public void onCreate(Bundle savedInstanceState) {
21			super.onCreate(savedInstanceState);
22			setContentView(R.layout.main);
23
24			findViewById(R.id.btn0).setOnClickListener( new NumericClick('0') );
25			findViewById(R.id.btn1).setOnClickListener( new NumericClick('1') );
26			findViewById(R.id.btn2).setOnClickListener( new NumericClick('2') );
27			findViewById(R.id.btn3).setOnClickListener( new NumericClick('3') );
28			findViewById(R.id.btn4).setOnClickListener( new NumericClick('4') );
29			findViewById(R.id.btn5).setOnClickListener( new NumericClick('5') );
30			findViewById(R.id.btn6).setOnClickListener( new NumericClick('6') );
31			findViewById(R.id.btn7).setOnClickListener( new NumericClick('7') );
32			findViewById(R.id.btn8).setOnClickListener( new NumericClick('8') );
33			findViewById(R.id.btn9).setOnClickListener( new NumericClick('9') );
34
35			findViewById(R.id.btnback).setOnClickListener( new BackClick() );
36			findViewById(R.id.btnpoint).setOnClickListener( new PointClick() );
37
38			findViewById(R.id.btnadd).setOnClickListener( new OperationClick('+') );
39			findViewById(R.id.btnsub).setOnClickListener( new OperationClick('-') );
40			findViewById(R.id.btnmul).setOnClickListener( new OperationClick('*') );
41			findViewById(R.id.btndiv).setOnClickListener( new OperationClick('/') );
42
43			findViewById(R.id.btnsum).setOnClickListener( new SumClick() );
44
45			mEdit = (EditText) findViewById(R.id.edit);
46			mEdit.setCursorVisible(false);
47
48
49			}
50
51
52			class NumericClick implements View.OnClickListener {
53			char mNumval;
54
55			public NumericClick(char numval) {
56			mNumval = numval;
57			}
58
59			@Override
60			public void onClick(View v) {
61			Editable tempText = mEdit.getText();
62
63			if (tempText.toString().equals("0") \|\| mClear==true ) {
64	torben	935	mClear=false;
65	torben	931	tempText.clear();
66			}
67			tempText.append(mNumval);
68			}
69
70			}
71
72			class BackClick implements View.OnClickListener {
73
74			@Override
75			public void onClick(View v) {
76			if (mClear) {
77	torben	933	mClear = false;
78	torben	931	mEdit.setText("0");
79			return;
80			}
81
82			Editable tempText = mEdit.getText();
83			if (tempText.length() > 0) {
84			CharSequence cs = tempText.subSequence(0, tempText.length() -1);
85			mEdit.setText(cs);
86			}
87			}
88			}
89
90			class PointClick implements View.OnClickListener {
91
92			@Override
93			public void onClick(View v) {
94
95			Editable tempText = mEdit.getText();
96			if (tempText.toString().indexOf('.') == -1) {
97			tempText.append('.');
98			}
99			}
100			}
101
102			class OperationClick implements View.OnClickListener {
103			char mOp;
104			public OperationClick(char op) {
105			mOp = op;
106			}
107
108			@Override
109			public void onClick(View v) {
110			mVal1 = Double.parseDouble( mEdit.getText().toString() );
111			mEdit.setText("0");
112
113			mOperation = mOp;
114
115			}
116			}
117
118			class SumClick implements View.OnClickListener {
119			@Override
120			public void onClick(View v) {
121			if (mOperation == ' ') {
122			return;
123			}
124
125			double val2 = Double.parseDouble( mEdit.getText().toString() );
126
127			Double res = 0.0;
128			switch (mOperation) {
129			case '+':
130			res = mVal1 + val2;
131			break;
132			case '-':
133			res = mVal1 - val2;
134			break;
135			case '*':
136			res = mVal1 * val2;
137			break;
138			case '/':
139			res = mVal1 / val2;
140			break;
141			}
142
143			if ( res.isInfinite() \|\| res.isNaN() ) {
144			mClear = true;
145			}
146
147			mEdit.setText( res.toString() );
148			mOperation = ' ';
149			mVal1 = res;
150			}
151			}
152			}