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  1. POAndroid Activities Question
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    copied!<p>Where do i declare a custom button in my main activity class? Can it be on the onStart Method or will it only work in the onCreate Method?</p> <p>Any Help would be appreciated?</p> <p>Also to further illustrate what i am talking about: Here is my activity class.</p> <pre><code>public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); if(D) Log.e(TAG, "+++ ON CREATE +++"); setContentView(R.layout.main); mBluetoothAdapter = BluetoothAdapter.getDefaultAdapter(); if (mBluetoothAdapter == null) { Toast.makeText(this, "Bluetooth is not available", Toast.LENGTH_LONG).show(); finish(); return; } } @Override public void onStart() { super.onStart(); if(D) Log.e(TAG, "++ ON START ++"); // If BT is not on, request that it be enabled. if (!mBluetoothAdapter.isEnabled()) { Intent enableIntent = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE); startActivityForResult(enableIntent, REQUEST_ENABLE_BT); } else { startApp(); } } private void startApp(){ View Patient_Button = findViewById(R.id.patientButton); Patient_Button.setOnClickListener(new OnClickListener() { public void onClick(View v) { //case R.id.patientButton: //Intent b = new Intent(getApplicationContext(), Detailed_ModeActivity.class); //startActivity(b); //break; } } ); View Doctor_Button = findViewById(R.id.doctorButton); Doctor_Button.setOnClickListener(new OnClickListener() { public void onClick(View v) { Intent a = new Intent(getApplicationContext(), Detailed_ModeActivity.class); startActivity(a); //break; } } ); View About_Option = findViewById(R.id.aboutButton); About_Option.setOnClickListener(new OnClickListener() { public void onClick(View v) { Intent c = new Intent(getApplicationContext(), About.class); startActivity(c); //break; } } ); </code></pre> <p>*</p> <p>main.xml:</p> <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt; &lt;LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:background="@color/background" android:layout_width="fill_parent" android:layout_height="fill_parent" android:padding="85dip" android:orientation="horizontal"&gt; &lt;LinearLayout android:layout_width="wrap_content" android:layout_height="fill_parent" android:layout_gravity="center" android:orientation="vertical"&gt; &lt;TextView android:text="@string/mainTitle" android:layout_width="fill_parent" android:layout_height="wrap_content" android:layout_gravity="center" android:layout_marginBottom="25dip" android:textSize="24.5sp"/&gt; &lt;!-- Patient Option --&gt; &lt;Button android:layout_width="fill_parent" android:layout_height="wrap_content" android:layout_weight="1" android:text="@string/patientButton" android:id="@+id/patientButton"&gt; &lt;/Button&gt; &lt;!-- Doctor Option --&gt; &lt;Button android:layout_width="fill_parent" android:layout_height="wrap_content" android:text="@string/doctorButton" android:layout_weight="1" android:id="@+id/doctorButton"&gt; &lt;/Button&gt; &lt;!-- Exit Mode --&gt; &lt;Button android:text="@string/exit" android:layout_weight="1" android:id="@+id/exit" android:layout_width="fill_parent" android:layout_height="wrap_content"&gt;&lt;/Button&gt; &lt;!-- About Mode --&gt; &lt;Button android:text="@string/aboutButton" android:layout_weight="1" android:id="@+id/aboutButton" android:layout_width="fill_parent" android:layout_height="wrap_content"&gt;&lt;/Button&gt; &lt;/LinearLayout&gt; &lt;/LinearLayout&gt; </code></pre>
 

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