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POGet linearLayout from another xml Android
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  1. POGet linearLayout from another xml Android
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    copied!<p>In need to get a LinearLayout that isn't located in the main xml file (the one that i set in setContentView()). So in write this code:</p> <pre><code>public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); LinearLayout main = (LinearLayout) findViewById(R.id.main1); LinearLayout oggetto = (LinearLayout) findViewById(R.id.element1); main.addView(oggetto); } </code></pre> <p>The xml file where element1 is written is:</p> <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt; &lt;LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:id="@+id/element1" android:layout_width="fill_parent" android:orientation="horizontal" android:layout_height="90px" android:background="#000000"&gt; &lt;LinearLayout android:id="@+id/linearLayoutLeftBar" android:layout_width="10px" android:layout_height="fill_parent" android:orientation="horizontal" android:background="#7FFF00" &gt; &lt;/LinearLayout&gt; &lt;LinearLayout android:id="@+id/linearLayoutRightContent" android:layout_width="fill_parent" android:layout_height="fill_parent" android:orientation="vertical" android:background="#EEEEEE" &gt; &lt;LinearLayout android:id="@+id/linearLayout1" android:layout_width="fill_parent" android:layout_height="45px" android:orientation="horizontal" android:background="#EEEEEE" &gt; &lt;LinearLayout android:id="@+id/linearLayoutTxtView1" android:layout_width="wrap_content" android:layout_height="fill_parent" android:orientation="vertical" android:background="#EEEEEE" android:layout_gravity="right" &gt; &lt;TextView android:id="@+id/textView1" android:layout_width="wrap_content" android:layout_height="fill_parent" android:text="TextBox1" android:layout_marginLeft="5px" android:textColor="#000000" android:gravity="center" /&gt; &lt;/LinearLayout&gt; &lt;LinearLayout android:id="@+id/linearLayoutImgView" android:layout_width="fill_parent" android:layout_height="fill_parent" android:orientation="vertical" android:gravity="right|center" &gt; &lt;ImageView android:id="@+id/imageView1" android:layout_width="16px" android:layout_height="16px" android:layout_marginRight="16px" android:src="@drawable/ic_launcher" android:background="#FF0000"/&gt; &lt;/LinearLayout&gt; &lt;/LinearLayout&gt; &lt;LinearLayout android:id="@+id/linearLayout2" android:layout_width="fill_parent" android:layout_height="45px" android:orientation="horizontal" android:background="#EEEEEE" &gt; &lt;LinearLayout android:id="@+id/linearLayoutTxtView1" android:layout_width="wrap_content" android:layout_height="fill_parent" android:orientation="vertical" android:background="#EEEEEE" android:layout_gravity="right" &gt; &lt;TextView android:id="@+id/textView2" android:layout_width="wrap_content" android:layout_height="fill_parent" android:text="TextBox2" android:layout_marginLeft="5px" android:textColor="#000000" android:gravity="center" /&gt; &lt;/LinearLayout&gt; &lt;LinearLayout android:id="@+id/linearLayoutImgView" android:layout_width="fill_parent" android:layout_height="fill_parent" android:orientation="vertical" android:gravity="right|center" &gt; &lt;TextView android:id="@+id/textView3" android:layout_width="wrap_content" android:layout_height="fill_parent" android:layout_marginRight="16px" android:text="TextBox3" android:textColor="#000000" android:gravity="center|right" /&gt; &lt;/LinearLayout&gt; &lt;/LinearLayout&gt; &lt;/LinearLayout&gt; &lt;/LinearLayout&gt; </code></pre> <p>The problem is that I get an error when I start the app: Unable to start activity ComponentInfo{com.chiamata/com.chiamata.ChiamataActivity}: java.lang.NullPointerException This because element1 is null. If I put if(element1 != null) before adding it to main Linearlayout everything works fine, but element1 is obviously not added. I need to add it programmatically, so I can't put all in one xml file. How can I do? Thanks, Mattia</p>
 

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