package de.hofk.kreisberechnung.app; import android.support.v7.app.ActionBarActivity; import android.os.Bundle; import android.view.Gravity; import android.view.Menu; import android.view.MenuItem; import android.view.SubMenu; import android.view.inputmethod.InputMethodManager; import android.widget.Button; import android.widget.EditText; import android.text.Editable; import android.text.TextWatcher; import android.widget.GridLayout; import android.widget.TextView; import android.content.Context; import android.graphics.Canvas; import android.graphics.Color; import android.graphics.Paint; import android.view.View; import android.app.AlertDialog; import android.content.DialogInterface; public class MainActivity extends ActionBarActivity { private int zaehle = 0 ; String radius_txt = ""; // Leerstring, falls sofort Berechnung ohne Eingabe @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); GridLayout gl = (GridLayout) findViewById(R.id.GridLayout1); gl.setColumnCount(2); gl.setRowCount(6); // bei 5 crash // Edit 1 Zeile 0, Spalte 0 GridLayout.LayoutParams lytp_edit1 = new GridLayout.LayoutParams(GridLayout.spec(0), GridLayout.spec(0)); final EditText edit1 = new EditText(this); edit1.setEms(4); edit1.setText(radius_txt); // für Softkeybord (wird nach Betätigung Button/Menü ausgeblendet - siehe dort final InputMethodManager imm = (InputMethodManager)getSystemService(Context.INPUT_METHOD_SERVICE); // Button 2 Zeile 1, Spalte 0 GridLayout.LayoutParams lytp_button2 = new GridLayout.LayoutParams(GridLayout.spec(1), GridLayout.spec(0)); final Button button2 = new Button(this); button2.setText(" Kreisfläche "); // Button 3 Zeile 2, Spalte 0 GridLayout.LayoutParams lytp_button3 = new GridLayout.LayoutParams(GridLayout.spec(2), GridLayout.spec(0)); final Button button3 = new Button(this); button3.setText("Kreisumfang"); // tv 1 Zeile 1, Spalte 1 Zeile erstreckt sich über 3 Zeilen GridLayout.LayoutParams lytp_tv1 = new GridLayout.LayoutParams(GridLayout.spec(0, 3), GridLayout.spec(1)); lytp_tv1.setGravity(Gravity.FILL); TextView tv1 = new TextView(this); tv1.setBackgroundColor(Color.argb(128, 50, 220, 220)); tv1.setText("\nBitte den Radius eingeben.\n" + "Dann den entsrechenden\n" + "Button betätigen.\n" + "Kreisformeln:\n" + "Fläche A = Pi*r*r\n" + "Umfang U = 2*Pi*r\n"); // tv 2 Zeile 3, Spalte 0 GridLayout.LayoutParams lytp_tv2 = new GridLayout.LayoutParams(GridLayout.spec(3), GridLayout.spec(0)); lytp_tv2.setGravity(Gravity.FILL); final TextView tv2 = new TextView(this); tv2.setText("Ergebnis\n"); // Button 4 Zeile 3, Spalte 1 GridLayout.LayoutParams lytp_button4 = new GridLayout.LayoutParams(GridLayout.spec(3), GridLayout.spec(1)); final Button button4 = new Button(this); button4.setText("Klickzähler"); button4.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { button4.setText("Button " + (++zaehle) + " mal geklickt"); } }); // Canvas Zeile 4 über 2 Spalten GridLayout.LayoutParams lytp_canv = new GridLayout.LayoutParams(GridLayout.spec(5), GridLayout.spec(0, 2)); CanvViev canv = new CanvViev(this); canv.setBackgroundColor(Color.rgb(240, 255, 160)); // Button und Textview mit Layout dem GridLayout übergeben gl.addView(edit1, lytp_edit1); gl.addView(button2, lytp_button2); gl.addView(button3, lytp_button3); gl.addView(tv2, lytp_tv2); gl.addView(button4, lytp_button4); gl.addView(tv1, lytp_tv1); gl.addView(canv, lytp_canv); edit1.addTextChangedListener(new TextWatcher() { @Override public void onTextChanged(CharSequence s, int start, int before, int count) { tv2.setText(" ... tippt gerade ... "); } @Override public void beforeTextChanged(CharSequence s, int start, int count, int after) { } @Override public void afterTextChanged(Editable s) { radius_txt = edit1.getText().toString(); } }); button2.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { imm.hideSoftInputFromWindow(edit1.getWindowToken(), 0); // Softkeybord ausblenden tv2.setText(berechne_flaeche(radius_txt)); // Kreisfläche berechnen } }); button3.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { imm.hideSoftInputFromWindow(edit1.getWindowToken(), 0); // Softkeybord ausblenden tv2.setText(berechne_umfang(radius_txt)); // Kreisumfang berechnen } }); } // onCreate(Bundle ... public class CanvViev extends View { Paint paint; public CanvViev(Context context) { super(context); paint = new Paint(); paint.setColor(Color.BLUE); paint.setStyle(Paint.Style.STROKE); } @Override public void onDraw(Canvas canvas) { canvas.drawCircle(200.0f, 100.0f, 80.0f, paint); canvas.drawCircle(150.0f, 250.0f, 120.0f, paint); canvas.drawCircle(350.0f, 450.0f, 200.0f, paint); } } public String berechne_flaeche(String kradius_txt) { // Fläche berechnen if (radius_txt.matches("\\d+([.]{1}\\d+)?")) { double kradius = Double.parseDouble(kradius_txt); double flaeche = Math.PI * kradius * kradius; flaeche = Math.round(flaeche * 1000.0) / 1000.0; return "Ergebnis:\nFläche = " + flaeche; } else { return "keine Zahl!" ; } } public String berechne_umfang(String kradius_txt) { // Umfang berechnen if (radius_txt.matches("\\d+([.]{1}\\d+)?")) { double kradius = Double.parseDouble(kradius_txt); double umfang = 2*Math.PI * kradius; umfang = Math.round(umfang * 1000.0) / 1000.0; return "Ergebnis:\nUmfang = " + umfang; } else { return "keine Zahl!" ; } } protected void ergebnisbox(String titel, String meldung) { new AlertDialog.Builder(this) .setMessage(meldung) .setTitle(titel) .setCancelable(true) .setNeutralButton( android.R.string.ok, new DialogInterface.OnClickListener() { public void onClick(DialogInterface dialog, int whichButton){} } ) .show(); } @Override public boolean onCreateOptionsMenu(Menu menu) { menu.add(Menu.NONE, 1, Menu.NONE, "Fläche berechnen"); menu.add(Menu.NONE, 2, Menu.NONE, "Umfang berechnen"); menu.add(Menu.NONE, 3, Menu.NONE, "Programm beenden"); return true; } @Override public boolean onOptionsItemSelected(MenuItem item) { if(item.getItemId() == 1 ) { ergebnisbox("Fläche",berechne_flaeche(radius_txt)); // Kreisfläche anzeigen return true; } if(item.getItemId() == 2 ) { ergebnisbox("Umfang",berechne_umfang(radius_txt)); // Kreisumfang anzeigen return true; } if(item.getItemId() == 3 ) { this.finish(); return true; } return super.onOptionsItemSelected(item); // oder nur return false; } } // MainActivity