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Crappy Calculator #1

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2 changes: 1 addition & 1 deletion .idea/misc.xml
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1 change: 1 addition & 0 deletions .idea/modules.xml
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1 change: 1 addition & 0 deletions .idea/vcs.xml
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21 changes: 21 additions & 0 deletions Lab2Exercise1_Wed.iml
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Original file line number Diff line number Diff line change
@@ -0,0 +1,21 @@
<?xml version="1.0" encoding="UTF-8"?>
<module external.linked.project.path="$MODULE_DIR$" external.root.project.path="$MODULE_DIR$" external.system.id="GRADLE" type="JAVA_MODULE" version="4">
<component name="FacetManager">
<facet type="java-gradle" name="Java-Gradle">
<configuration>
<option name="BUILD_FOLDER_PATH" value="$MODULE_DIR$/build" />
</configuration>
</facet>
</component>
<component name="NewModuleRootManager" inherit-compiler-output="false">
<output url="file://$MODULE_DIR$/build/classes/main" />
<output-test url="file://$MODULE_DIR$/build/classes/test" />
<exclude-output />
<content url="file://$MODULE_DIR$">
<excludeFolder url="file://$MODULE_DIR$/.gradle" />
</content>
<orderEntry type="inheritedJdk" />
<orderEntry type="sourceFolder" forTests="false" />
</component>
</module>

97 changes: 95 additions & 2 deletions app/src/main/java/th/ac/tu/siit/its333/lab2exercise1/MainActivity.java
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Original file line number Diff line number Diff line change
Expand Up @@ -14,6 +14,7 @@ public class MainActivity extends ActionBarActivity {

// expr = the current string to be calculated
StringBuffer expr;
int memory =0;

@Override
protected void onCreate(Bundle savedInstanceState) {
Expand All @@ -28,6 +29,44 @@ public void updateExprDisplay() {
tvExpr.setText(expr.toString());
}

public void memoryHandle(View v)
{
int id = v.getId();
TextView tvAns = (TextView)findViewById(R.id.tvAns);
switch(id){
case R.id.madd:
int memadd = Integer.parseInt(tvAns.getText().toString());
memory+=memadd;
Toast t1 = Toast.makeText(this.getApplicationContext(),
"Memory Added, Value="+memory, Toast.LENGTH_SHORT);
t1.show();
break;
case R.id.msub:
int memsub = Integer.parseInt(tvAns.getText().toString());
memory-=memsub;
Toast t2 = Toast.makeText(this.getApplicationContext(),
"Memory Subtracted, Value="+memory, Toast.LENGTH_SHORT);
t2.show();
break;
case R.id.mr:
TextView tvExpr = (TextView)findViewById(R.id.tvExpr);
tvAns.setText(Integer.toString(memory));
Toast t3 = Toast.makeText(this.getApplicationContext(),
"Memory Showed", Toast.LENGTH_SHORT);
expr = new StringBuffer(Integer.toString(memory));
updateExprDisplay();
t3.show();
break;
case R.id.mc:
memory = 0;
Toast t4 = Toast.makeText(this.getApplicationContext(),
"Memory Cleared, Value="+memory, Toast.LENGTH_SHORT);
t4.show();
break;
default: break;
}
}

public void recalculate() {
//Calculate the expression and display the output

Expand All @@ -36,6 +75,40 @@ public void recalculate() {
//reference: http://stackoverflow.com/questions/2206378/how-to-split-a-string-but-also-keep-the-delimiters
String e = expr.toString();
String[] tokens = e.split("((?<=\\+)|(?=\\+))|((?<=\\-)|(?=\\-))|((?<=\\*)|(?=\\*))|((?<=/)|(?=/))");
TextView tvAns = (TextView)findViewById(R.id.tvAns);
if(tokens.length == 1)
{
tvAns.setText(tokens[0]);
}
else
{
if(tokens.length%2 == 1)
{
int result = Integer.parseInt(tokens[0]);
for(int i=1;i<tokens.length;i+=2)
{
String operator = tokens[i];
int operand = Integer.parseInt(tokens[i+1]);
if(operator.equals("+"))
{
result+=operand;
}
if(operator.equals("-"))
{
result-=operand;
}
if(operator.equals("*"))
{
result*=operand;
}
if(operator.equals("/"))
{
result/=operand;
}
}
tvAns.setText(Integer.toString(result));
}
}
}

public void digitClicked(View v) {
Expand All @@ -51,14 +124,33 @@ public void digitClicked(View v) {

public void operatorClicked(View v) {
//IF the last character in expr is not an operator and expr is not "",
//THEN append the clicked operator and updateExprDisplay,
//ELSE do nothing
if(expr.length()!=0)
{
char last = expr.charAt(expr.length() - 1);
if (last != '+' && last != '-' && last != '*' && last != '/')
{
//THEN append the clicked operator and updateExprDisplay,
String d = ((TextView) v).getText().toString();
expr.append(d);
updateExprDisplay();
}
}
}

public void equalClicked(View v){
TextView tvAns = (TextView)findViewById(R.id.tvAns);
String result = tvAns.getText().toString();
expr = new StringBuffer(result);
updateExprDisplay();
tvAns.setText("0");
}

public void ACClicked(View v) {
//Clear expr and updateExprDisplay
expr = new StringBuffer();
updateExprDisplay();
TextView tvAns = (TextView)findViewById(R.id.tvAns);
tvAns.setText(expr.toString());
//Display a toast that the value is cleared
Toast t = Toast.makeText(this.getApplicationContext(),
"All cleared", Toast.LENGTH_SHORT);
Expand All @@ -70,6 +162,7 @@ public void BSClicked(View v) {
if (expr.length() > 0) {
expr.deleteCharAt(expr.length()-1);
updateExprDisplay();
recalculate();
}
}

Expand Down
12 changes: 8 additions & 4 deletions app/src/main/res/layout/activity_main.xml
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Original file line number Diff line number Diff line change
Expand Up @@ -73,7 +73,8 @@
android:id="@+id/madd"
android:layout_row="3"
android:layout_column="0"
android:textSize="28sp" />
android:textSize="28sp"
android:onClick="memoryHandle" />

<Button
android:layout_width="wrap_content"
Expand All @@ -82,7 +83,8 @@
android:id="@+id/msub"
android:layout_row="3"
android:layout_column="1"
android:textSize="28sp" />
android:textSize="28sp"
android:onClick="memoryHandle" />

<Button
android:layout_width="wrap_content"
Expand All @@ -91,7 +93,8 @@
android:id="@+id/mr"
android:layout_row="3"
android:layout_column="2"
android:textSize="28sp" />
android:textSize="28sp"
android:onClick="memoryHandle" />

<Button
android:layout_width="wrap_content"
Expand All @@ -100,7 +103,8 @@
android:id="@+id/mc"
android:layout_row="3"
android:layout_column="3"
android:textSize="28sp" />
android:textSize="28sp"
android:onClick="memoryHandle" />

<Button
android:layout_width="wrap_content"
Expand Down