Initial design and functionality

1 files changed, 194 insertions, 0 deletions

diff --git a/app/src/main/java/me/marvinborner/myapplication/MainActivity.java b/app/src/main/java/me/marvinborner/myapplication/MainActivity.java
new file mode 100644
index 0000000..921f0f1
--- /dev/null
+++ b/app/src/main/java/me/marvinborner/myapplication/MainActivity.java
@@ -0,0 +1,194 @@
+package me.marvinborner.myapplication;
+
+import android.os.Bundle;
+import android.support.v7.app.AppCompatActivity;
+import android.text.method.ScrollingMovementMethod;
+import android.view.View;
+import android.widget.Button;
+import android.widget.TextView;
+
+public class MainActivity extends AppCompatActivity {
+
+    Button button0, button1, button2, button3, button4, button5, button6,
+            button7, button8, button9, buttonAdd, buttonSub, buttonDivision,
+            buttonMul, button10, buttonC, buttonEqual;
+    TextView ResultTextView;
+
+    float mValueOne, mValueTwo;
+
+    boolean Addition, Subtraction, Multiplication, Division;
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_main);
+
+        button0 = findViewById(R.id.button0);
+        button1 = findViewById(R.id.button1);
+        button2 = findViewById(R.id.button2);
+        button3 = findViewById(R.id.button3);
+        button4 = findViewById(R.id.button4);
+        button5 = findViewById(R.id.button5);
+        button6 = findViewById(R.id.button6);
+        button7 = findViewById(R.id.button7);
+        button8 = findViewById(R.id.button8);
+        button9 = findViewById(R.id.button9);
+        button10 = findViewById(R.id.button10);
+        buttonAdd = findViewById(R.id.buttonadd);
+        buttonSub = findViewById(R.id.buttonsub);
+        buttonMul = findViewById(R.id.buttonmul);
+        buttonDivision = findViewById(R.id.buttondiv);
+        buttonC = findViewById(R.id.buttonC);
+        buttonEqual = findViewById(R.id.buttoneql);
+        ResultTextView = findViewById(R.id.edt1);
+
+        ResultTextView.setMovementMethod(new ScrollingMovementMethod());
+
+
+        button1.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                ResultTextView.setText(ResultTextView.getText() + "1");
+            }
+        });
+
+        button2.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                ResultTextView.setText(ResultTextView.getText() + "2");
+            }
+        });
+
+        button3.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                ResultTextView.setText(ResultTextView.getText() + "3");
+            }
+        });
+
+        button4.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                ResultTextView.setText(ResultTextView.getText() + "4");
+            }
+        });
+
+        button5.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                ResultTextView.setText(ResultTextView.getText() + "5");
+            }
+        });
+
+        button6.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                ResultTextView.setText(ResultTextView.getText() + "6");
+            }
+        });
+
+        button7.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                ResultTextView.setText(ResultTextView.getText() + "7");
+            }
+        });
+
+        button8.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                ResultTextView.setText(ResultTextView.getText() + "8");
+            }
+        });
+
+        button9.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                ResultTextView.setText(ResultTextView.getText() + "9");
+            }
+        });
+
+        button0.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                ResultTextView.setText(ResultTextView.getText() + "0");
+            }
+        });
+
+        buttonAdd.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+
+                if (ResultTextView == null) {
+                    ResultTextView.setText("");
+                } else {
+                    mValueOne = Float.parseFloat(ResultTextView.getText() + "");
+                    Addition = true;
+                    ResultTextView.setText(null);
+                }
+            }
+        });
+
+        buttonSub.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                mValueOne = Float.parseFloat(ResultTextView.getText() + "");
+                Subtraction = true;
+                ResultTextView.setText(null);
+            }
+        });
+
+        buttonMul.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                mValueOne = Float.parseFloat(ResultTextView.getText() + "");
+                Multiplication = true;
+                ResultTextView.setText(null);
+            }
+        });
+
+        buttonDivision.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                mValueOne = Float.parseFloat(ResultTextView.getText() + "");
+                Division = true;
+                ResultTextView.setText(null);
+            }
+        });
+
+        buttonEqual.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                mValueTwo = Float.parseFloat(ResultTextView.getText() + "");
+
+                if (Addition){
+                    ResultTextView.setText(mValueOne + mValueTwo + "");
+                    Addition = false;
+                } else if (Subtraction) {
+                    ResultTextView.setText(mValueOne - mValueTwo + "");
+                    Subtraction = false;
+                } else if (Multiplication) {
+                    ResultTextView.setText(mValueOne * mValueTwo + "");
+                    Multiplication = false;
+                } else if (Division) {
+                    ResultTextView.setText(mValueOne / mValueTwo + "");
+                    Division = false;
+                }
+            }
+        });
+
+        buttonC.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                ResultTextView.setText("");
+            }
+        });
+
+        button10.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                ResultTextView.setText(ResultTextView.getText() + ".");
+            }
+        });
+    }
+}