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Brian WiederBrian Wieder
Brian Wieder
authored and
Brian Wieder
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Added Quadratic Formula and Trinomial Factoring
1 parent e7e4641 commit d85cb8d

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9 files changed

+415
-2
lines changed

9 files changed

+415
-2
lines changed

‎.idea/modules.xml

+1
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‎.idea/vcs.xml

-1
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‎app/src/main/AndroidManifest.xml

+3-1
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@@ -16,7 +16,9 @@
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</intent-filter>
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</activity>
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<activity android:name=".PolynomialActivity" />
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<activity android:name=".BinomialActivity"></activity>
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<activity android:name=".BinomialActivity" />
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<activity android:name=".QuadraticActivity" />
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<activity android:name=".TrinomialActivity"></activity>
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</application>
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</manifest>

‎app/src/main/java/com/a4wieders/algebraandbeyond/Functions.java

+38
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@@ -84,4 +84,42 @@ private static String cant(){
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public static String BinomialFactoring(double x, double constant){
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return"("+sqrt(x)+"x + "+sqrt(constant) +")("+sqrt(x)+"x - "+sqrt(constant)+")\nAlways check to make sure that the outputing factors are in simplest form";
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}
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public static String QuadraticFormula(double a, double b, double c){
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Double determinant = b*b-4*a*c;
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if(determinant > 0){
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double root2 = (-b-sqrt(determinant))/(2*a);
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double root1 = (-b+sqrt(determinant))/(2*a);
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return "The roots of this is are "+root1 +" and "+root2;
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}else if(determinant == 0) {
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double root1 = -b / (2 * a);
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double root2 = root1;
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return "The roots of this is are " + root1 + " and " + root2;
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}
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Log.e("Debug", "The determinate is "+ determinant);
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return "Error, roots could not be found";
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}
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public static String findStuff(double firstCoeffient, double secondCoeffient, double thirdCoeffient){
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boolean found = false;
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double x = -200;
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int y1 = -200;
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while(!found){
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double firstThird = firstCoeffient * thirdCoeffient;
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double xDivThird = firstThird / x;
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double xPxDthird = x + xDivThird;
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if(xPxDthird == secondCoeffient){
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return GCF(x, xDivThird, firstCoeffient, thirdCoeffient);
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}else{
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x += 1;
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y1 += 1;
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}
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if(y1 >= 2000){
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return cant();
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}
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}
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return cant();
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}
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}

‎app/src/main/java/com/a4wieders/algebraandbeyond/MainActivity.java

+14
Original file line numberDiff line numberDiff line change
@@ -32,5 +32,19 @@ public void onClick(View v) {
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startActivity(binoIntent);
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}
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});
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QuadBtn.setOnClickListener(new View.OnClickListener() {
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@Override
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public void onClick(View v) {
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Intent quadIntent = new Intent(MainActivity.this, QuadraticActivity.class);
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startActivity(quadIntent);
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}
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});
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TriBtn.setOnClickListener(new View.OnClickListener() {
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@Override
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public void onClick(View v) {
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Intent triIntent = new Intent(MainActivity.this, TrinomialActivity.class);
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startActivity(triIntent);
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}
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});
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}
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}

‎app/src/main/java/com/a4wieders/algebraandbeyond/QuadraticActivity.java

+67
Original file line numberDiff line numberDiff line change
@@ -0,0 +1,67 @@
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package com.a4wieders.algebraandbeyond;
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import android.content.DialogInterface;
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import android.content.Intent;
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import android.support.v7.app.AlertDialog;
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import android.support.v7.app.AppCompatActivity;
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import android.os.Bundle;
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import android.view.View;
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import android.widget.Button;
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import android.widget.EditText;
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import android.widget.TextView;
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public class QuadraticActivity extends AppCompatActivity {
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EditText x2;
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EditText x;
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EditText constant;
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Button calculate;
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TextView result;
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@Override
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protected void onCreate(Bundle savedInstanceState) {
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super.onCreate(savedInstanceState);
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setContentView(R.layout.activity_quadratic);
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x2 = (EditText) findViewById(R.id.x2Quad);
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x = (EditText) findViewById(R.id.xQuad);
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constant = (EditText) findViewById(R.id.constQuad);
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calculate = (Button) findViewById(R.id.calcBtnQuad);
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result = (TextView) findViewById(R.id.resultLblQuad);
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calculate.setOnClickListener(new View.OnClickListener() {
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@Override
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public void onClick(View v) {
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String x2String = x2.getText().toString();
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String xString = x.getText().toString();
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String constString = constant.getText().toString();
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if(!x2String.isEmpty() && x2String != null && !xString.isEmpty() && xString != null && !constString.isEmpty() && constString != null){
40+
try {
41+
double x2Double = Double.parseDouble(x2.getText().toString());
42+
double xDouble = Double.parseDouble(x.getText().toString());
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double constantDouble = Double.parseDouble(constant.getText().toString());
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result.setText(Functions.QuadraticFormula(x2Double, xDouble, constantDouble));
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} catch (NumberFormatException e) {
48+
AlertDialog.Builder errorDialog = new AlertDialog.Builder(QuadraticActivity.this);
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errorDialog.setTitle("Incompatible numbers");
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errorDialog.setMessage("Please enter compatible numbers");
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errorDialog.setCancelable(false);
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errorDialog.setPositiveButton("Ok", new DialogInterface.OnClickListener() {
53+
@Override
54+
public void onClick(DialogInterface dialog, int which) {
55+
Intent main = new Intent(QuadraticActivity.this, MainActivity.class);
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startActivity(main);
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}
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});
59+
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AlertDialog error = errorDialog.create();
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error.show();
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}
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}
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}
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});
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}
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}

‎app/src/main/java/com/a4wieders/algebraandbeyond/TrinomialActivity.java

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package com.a4wieders.algebraandbeyond;
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import android.content.DialogInterface;
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import android.content.Intent;
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import android.support.v7.app.AlertDialog;
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import android.support.v7.app.AppCompatActivity;
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import android.os.Bundle;
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import android.view.View;
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import android.widget.Button;
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import android.widget.EditText;
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import android.widget.TextView;
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public class TrinomialActivity extends AppCompatActivity {
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EditText x2;
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EditText x;
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EditText constant;
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Button calculate;
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TextView result;
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@Override
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protected void onCreate(Bundle savedInstanceState) {
23+
super.onCreate(savedInstanceState);
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setContentView(R.layout.activity_trinomial);
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x2 = (EditText) findViewById(R.id.x2Tri);
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x = (EditText) findViewById(R.id.xTri);
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constant = (EditText) findViewById(R.id.constTri);
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calculate = (Button) findViewById(R.id.calcTri);
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result = (TextView) findViewById(R.id.resultTri);
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calculate.setOnClickListener(new View.OnClickListener() {
33+
@Override
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public void onClick(View v) {
35+
try {
36+
double x2Double = Double.parseDouble(x2.getText().toString());
37+
double xDouble = Double.parseDouble(x.getText().toString());
38+
double constantDouble = Double.parseDouble(constant.getText().toString());
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40+
result.setText(Functions.findStuff(x2Double, xDouble, constantDouble));
41+
42+
} catch (NumberFormatException e) {
43+
AlertDialog.Builder errorDialog = new AlertDialog.Builder(TrinomialActivity.this);
44+
errorDialog.setTitle("Incompatible numbers");
45+
errorDialog.setMessage("Please enter compatible numbers");
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errorDialog.setCancelable(false);
47+
errorDialog.setPositiveButton("Ok", new DialogInterface.OnClickListener() {
48+
@Override
49+
public void onClick(DialogInterface dialog, int which) {
50+
Intent main = new Intent(TrinomialActivity.this, MainActivity.class);
51+
startActivity(main);
52+
}
53+
});
54+
55+
AlertDialog error = errorDialog.create();
56+
error.show();
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}
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}
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});
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}
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}

‎app/src/main/res/layout/activity_quadratic.xml

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<?xml version="1.0" encoding="utf-8"?>
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<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
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xmlns:tools="http://schemas.android.com/tools"
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android:layout_width="match_parent"
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android:layout_height="match_parent"
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android:paddingBottom="@dimen/activity_vertical_margin"
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android:paddingLeft="@dimen/activity_horizontal_margin"
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android:paddingRight="@dimen/activity_horizontal_margin"
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android:paddingTop="@dimen/activity_vertical_margin"
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tools:context="com.a4wieders.algebraandbeyond.QuadraticActivity"
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android:background="#00ff22">
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<LinearLayout
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android:orientation="vertical"
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android:layout_width="match_parent"
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android:layout_height="match_parent">
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<LinearLayout
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android:orientation="horizontal"
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android:layout_width="match_parent"
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android:layout_height="wrap_content" >
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<TextView
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android:layout_width="90dp"
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android:layout_height="wrap_content"
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android:textAppearance="?android:attr/textAppearanceLarge"
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android:text="X^2"
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android:id="@+id/textView5"
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android:textAlignment="center"
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android:textColor="#000000" />
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<EditText
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android:layout_width="fill_parent"
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android:layout_height="wrap_content"
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android:ems="10"
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android:id="@+id/x2Quad"
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android:hint="X^2"
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android:backgroundTint="#000000"
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android:textColor="#000000"
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android:inputType="text"
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android:selectAllOnFocus="true" />
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</LinearLayout>
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<LinearLayout
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android:orientation="horizontal"
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android:layout_width="match_parent"
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android:layout_height="wrap_content" >
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<TextView
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android:layout_width="90dp"
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android:layout_height="wrap_content"
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android:textAppearance="?android:attr/textAppearanceLarge"
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android:text="X "
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android:id="@+id/textView6"
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android:textAlignment="center"
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android:textColor="#000000" />
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<EditText
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android:layout_width="fill_parent"
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android:layout_height="wrap_content"
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android:ems="10"
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android:id="@+id/xQuad"
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android:hint="X"
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android:backgroundTint="#000000"
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android:textColor="#000000"
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android:inputType="text"
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android:selectAllOnFocus="true" />
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</LinearLayout>
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<LinearLayout
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android:orientation="horizontal"
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android:layout_width="match_parent"
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android:layout_height="wrap_content" >
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<TextView
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android:layout_width="90dp"
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android:layout_height="wrap_content"
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android:textAppearance="?android:attr/textAppearanceLarge"
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android:text="Constant"
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android:id="@+id/textView7"
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android:textAlignment="center"
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android:textColor="#000000" />
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<EditText
85+
android:layout_width="fill_parent"
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android:layout_height="wrap_content"
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android:ems="10"
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android:id="@+id/constQuad"
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android:hint="Constant"
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android:backgroundTint="#000000"
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android:textColor="#000000"
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android:inputType="text"
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android:selectAllOnFocus="true" />
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</LinearLayout>
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<Button
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android:layout_width="wrap_content"
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android:layout_height="wrap_content"
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android:text="Calculate"
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android:id="@+id/calcBtnQuad"
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android:layout_gravity="center_horizontal" />
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<TextView
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android:layout_width="wrap_content"
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android:layout_height="wrap_content"
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android:textAppearance="?android:attr/textAppearanceLarge"
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android:id="@+id/resultLblQuad"
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android:layout_gravity="center_horizontal"
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android:textAlignment="center" />
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</LinearLayout>
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</RelativeLayout>

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