title: how do i call java class methods to other java class file on android development
body: <p>i hav two classes...both classes are extends activity.. i need call other class method on main class on android development..its urgent..please.. i done something like subclass sub = new subclass()...its not work..</p>
  
  <p>In 1st activity class</p>
  
  <pre><code>package org.me.intent_testing;
  
  import android.app.Activity; import android.os.Bundle; import android.widget.; import android.view.; import android.content.Intent;
  
  /** * * @author pavankumar */
  
  public class FirstActivity extends Activity {
  
  @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main);
  
  // Button orderButton = (Button)findViewById(R.id.order); Button orderButton = new Button(this); orderButton.setOnClickListener(new View.OnClickListener() {
  
    @Override
    public void onClick(View view) {
      Intent intent = new Intent(FirstActivity.this, secondActivity.class);
      startActivity(intent);
    }
  
  });
  } }
  
  In secondActivity class
  
  package org.me.intent_testing;
  
  /** * * @author pavankumar */
  
  import android.app.Activity; import android.os.Bundle; import android.widget.; import android.view.; import android.content.Intent;
  
  public class secondActivity extends Activity {
  
  @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); // setContentView(R.layout.order);
  
  // Button orderButton = (Button) findViewById(R.id.end); Button orderButton = new Button(this); orderButton.setOnClickListener(new View.OnClickListener() {
  
    @Override
    public void onClick(View view) {
      finish();
    }
  
  });
  } }
  </code></pre>
  
  <p>In AndroidManifest.xml</p>
  
  <pre><code>&lt;?xml version="1.0" encoding="UTF-8"?&gt;
  &lt;manifest xmlns:android="http://schemas.android.com/apk/res/android"
       package="org.me.intent_testing"&gt;
      &lt;application&gt;
           &lt;activity android:name=".FirstActivity" android:label="FirstActivity"&gt;
              &lt;intent-filter&gt;
                  &lt;action android:name="android.intent.action.MAIN"/&gt;
                  &lt;category android:name="android.intent.category.LAUNCHER"/&gt;
              &lt;/intent-filter&gt;
          &lt;/activity&gt;
           &lt;activity android:name=".OrderScreen" /&gt;
      &lt;/application&gt;
  
  &lt;/manifest&gt;
  </code></pre>
  
  <p>I hv problem to linking between two classes..</p>