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POerror trying to change activities using onClick()
 

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    <p>I have the following program that does a calculation based on user input.But when I click the <code>calc</code> button which is referenced in <code>onClick()</code> nothing happens.As in it doesn't navigate to the result screen.Can somebody shed some light on this as I'm not sure why iit isn't changing intent.</p> <p>My main class is like this:</p> <pre><code>public class MainActivity extends Activity implements android.view.View.OnClickListener { //variables for xml objects EditText offsetLength,offsetDepth,ductDepth; Button calculate; protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); //setting the variables to the xml id's and setting the click listener on the calc button offsetLength = (EditText)findViewById(R.id.offLength); offsetDepth = (EditText)findViewById(R.id.offDepth); ductDepth = (EditText)findViewById(R.id.ductDepth); calculate = (Button)findViewById(R.id.calc); calculate.setOnClickListener((OnClickListener) this); } //called when button is clicked. public void OnClick(View v) { try { String getoffsetlength = offsetLength.getText().toString(); String getoffsetdepth = offsetDepth.getText().toString(); String getductdepth = ductDepth.getText().toString(); double tri1,tri2; double marking1,marking2; double off1 = Double.parseDouble(getoffsetlength); double off2 = Double.parseDouble(getoffsetdepth); double off3 = Double.parseDouble(getductdepth) ; marking1 = Math.pow(off1,2) + Math.pow(off2,2); tri1 = (float)off2/(float)off1; tri2 = (float)off3/Math.atan((float)tri1); marking2 = (float)off3/Math.atan(tri2); Intent myIntent = new Intent(this, CalcResult.class); myIntent.putExtra("number1", marking1); myIntent.putExtra("number2", marking2); startActivity(myIntent); Intent i = new Intent(this,CalcResult.class); } catch (NumberFormatException e) { // TODO: handle exception System.out.println("Must enter a numeric value!"); } } </code></pre> <p>Also this is the class where my calculation that should be navigated to:</p> <pre><code> public class CalcResult extends MainActivity { EditText result1,result2; protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.result); result1 = (EditText)findViewById(R.id.mark1); result2 = (EditText)findViewById(R.id.mark2); Intent intent = getIntent(); Bundle bundle = intent.getExtras(); double mark1 = bundle.getDouble("number1"); double mark2 = bundle.getDouble("number2"); } } </code></pre>
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    1. USuser2815899
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    1. CODo you have `implements OnClickListener` in your class header?
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      1. UScodeMagic
    2. COI have `implements android.view.View.OnClickListener`
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    3. COHave you set breakpoints to see if it enters the `onClick()` or not
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