android 简单计算器

package supperRabbit.simpleCalculator; import java.math.BigDecimal; import android.app.Activity; import android.os.Bundle; import android.view.View; import android.view.View.OnClickListener; import android.widget.Button; import android.widget.TextView; public class SimpleCalculator extends Activity { /** Called when the activity is first created. */ private TextView outputForm; private Button numberZero; private Button numberOne; private Button numberTwo; private Button numberThree; private Button numberFour; private Button numberFive; private Button numberSix; private Button numberSeven; private Button numberEight; private Button numberNine; private Button pointButton; private Button clearButton; private Button deleteButton; private Button plusButton; private Button equalButton; private Button substractButton; private Button multiplyButton; private Button divisionButton; double plusNumber = 0; int symble = 0; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); //获取各个控件 outputForm = (TextView)findViewById(R.id.outputForm); numberZero = (Button) findViewById(R.id.numberZero); numberOne = (Button) findViewById(R.id.numberOne); numberTwo = (Button) findViewById(R.id.numberTwo); numberThree = (Button) findViewById(R.id.numberThree); numberFour = (Button) findViewById(R.id.numberFour); numberFive = (Button) findViewById(R.id.numberFive); numberSix = (Button) findViewById(R.id.numberSix); numberSeven = (Button) findViewById(R.id.numberSeven); numberEight = (Button) findViewById(R.id.numberEight); numberNine = (Button) findViewById(R.id.numberNine); pointButton = (Button) findViewById(R.id.pointButton); clearButton = (Button) findViewById(R.id.clearButton); deleteButton = (Button)findViewById(R.id.deleteButton); plusButton = (Button) findViewById(R.id.plusButton); equalButton = (Button) findViewById(R.id.equalButton); substractButton = (Button) findViewById(R.id.substractButton); multiplyButton = (Button) findViewById(R.id.multiplyButton); divisionButton = (Button) findViewById(R.id.divisionButton); outputForm.setText("0"); numberZero.setOnClickListener(new MyButtonListener()); numberOne.setOnClickListener(new MyButtonListener()); numberTwo.setOnClickListener(new MyButtonListener()); numberThree.setOnClickListener(new MyButtonListener()); numberFour.setOnClickListener(new MyButtonListener()); numberFive.setOnClickListener(new MyButtonListener()); numberSix.setOnClickListener(new MyButtonListener()); numberSeven.setOnClickListener(new MyButtonListener()); numberEight.setOnClickListener(new MyButtonListener()); numberNine.setOnClickListener(new MyButtonListener()); clearButton.setOnClickListener(new MyButtonListener()); pointButton.setOnClickListener(new MyButtonListener()); deleteButton.setOnClickListener(new MyButtonListener()); plusButton.setOnClickListener(new MyButtonListener()); equalButton.setOnClickListener(new MyButtonListener()); substractButton.setOnClickListener(new MyButtonListener()); multiplyButton.setOnClickListener(new MyButtonListener()); divisionButton.setOnClickListener(new MyButtonListener()); } class MyButtonListener implements OnClickListener { @Override public void onClick(View v) { // TODO Auto-generated method stub switch (v.getId()) { case(R.id.numberZero): numberZeroClick(); break; case(R.id.numberOne): numberOneToNineClick("1"); break; case(R.id.numberTwo): numberOneToNineClick("2"); break; case(R.id.numberThree): numberOneToNineClick("3"); break; case(R.id.numberFour): numberOneToNineClick("4"); break; case(R.id.numberFive): numberOneToNineClick("5"); break; case(R.id.numberSix): numberOneToNineClick("6"); break; case(R.id.numberSeven): numberOneToNineClick("7"); break; case(R.id.numberEight): numberOneToNineClick("8"); break; case(R.id.numberNine): numberOneToNineClick("9"); break; case(R.id.clearButton): clearButtonClick(); break; case(R.id.deleteButton): deleteButtonClick(); break; case(R.id.pointButton): pointButtonClick(); break; case(R.id.plusButton): plusButtonClick(); break; case(R.id.substractButton): substractButtonClick(); break; case(R.id.multiplyButton): multiplyButtonClick(); break; case(R.id.divisionButton): divisionButtonClick(); break; case(R.id.equalButton): equalButtonClick(); break; } } private void equalButtonClick() { // TODO Auto-generated method stub String existNumber = outputForm.getText().toString(); double result = 0; String theResult = ""; double number2 = Double.parseDouble(existNumber); switch(symble) { case(1): if(plusNumber == 315 && number2 == 518) { theResult = "我爱你！"; } else { result = plusNumber + number2; } break; case(2):result = plusNumber - number2; //Log.v("aaa","sdf"); break; case(3):result = plusNumber * number2; break; case(4):result = plusNumber / number2; break; } symble = 0; plusNumber = 0; if(theResult == "我爱你！") { outputForm.setText(theResult); } else { //解决textView中输出的double类型结果中小数点的问题 ，例如3*5 输出了15.0 BigDecimal result1 = new BigDecimal(result); if(result1.compareTo(result1.setScale(0,BigDecimal.ROUND_FLOOR)) == 0) { theResult = result1.setScale(0,BigDecimal.ROUND_FLOOR).toString(); } else { theResult = result1.toString(); } //String theResult = Double.toString(result); outputForm.setText(theResult); } } private void divisionButtonClick() { // TODO Auto-generated method stub String existNumber = outputForm.getText().toString(); double aaa = Double.parseDouble(existNumber); if(plusNumber == 0) { plusNumber = aaa; } else { plusNumber /= aaa; } outputForm.setText("0"); symble = 4; } private void multiplyButtonClick() { // TODO Auto-generated method stub String existNumber = outputForm.getText().toString(); double aaa = Double.parseDouble(existNumber); if(plusNumber == 0) { plusNumber = aaa; } else { plusNumber *= aaa; } outputForm.setText("0"); symble = 3; } private void substractButtonClick() { // TODO Auto-generated method stub String existNumber = outputForm.getText().toString(); double aaa = Double.parseDouble(existNumber); if(plusNumber == 0) { plusNumber = aaa; } else { plusNumber -= aaa; } outputForm.setText("0"); symble = 2; } private void plusButtonClick() { // TODO Auto-generated method stub String existNumber = outputForm.getText().toString(); double aaa = Double.parseDouble(existNumber); plusNumber += aaa; outputForm.setText("0"); symble = 1; } private void pointButtonClick() { // TODO Auto-generated method stub String existNumber = outputForm.getText().toString(); if(existNumber.equals("0")) { outputForm.setText("0."); } else if(existNumber.indexOf(".") < 0) { outputForm.setText(existNumber + "."); } } private void deleteButtonClick() { // TODO Auto-generated method stub String existNumber = outputForm.getText().toString(); if(!existNumber.equals("0")) { String cutNumber = existNumber.substring(0, existNumber.length()-1).toString(); if(cutNumber.equals("")) { outputForm.setText("0"); } else { outputForm.setText(cutNumber); } } } private void clearButtonClick() { // TODO Auto-generated method stub outputForm.setText("0"); }