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    <p>Other than the answers posted. You are trying to initialize views without setting the content to the activity in NextActivity. You can findviewbyid of the views of the current view hierarchy set to the activity.</p> <p>If you need to navigate from one activity to another say on button click</p> <pre><code> startActivity(new Intent(ActivityName.this,NextActivity.class); or startActiivty(new Intent("packagename.NextActivity); </code></pre> <p>setContentView. You have misunderstood the purpose of setContentView. </p> <p><a href="http://developer.android.com/reference/android/app/Activity.html#setContentView(int)" rel="nofollow">http://developer.android.com/reference/android/app/Activity.html#setContentView(int)</a></p> <p><strong>Set the activity content to an explicit view</strong>. </p> <p>This view is placed directly into the activity's view hierarchy. It can itself be a complex view hierarchy. When calling this method, the layout parameters of the specified view are ignored. Both the width and the height of the view are set by default to MATCH_PARENT. To use your own layout parameters, invoke setContentView(android.view.View, android.view.ViewGroup.LayoutParams) instead.</p> <p>Parameters</p> <pre><code> view The desired content to display. </code></pre> <p>In your NextActivity</p> <pre><code> @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); // this should be first not in buttonclick2() textView2 = (TextView) findViewById(R.id.textView2); // then initialize views. ... } </code></pre> <p>Example:</p> <pre><code> public class MainActivity extends Activity { String passw; TextView textView; Button button; EditText editText; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); textView = (TextView) findViewById(R.id.textView1); editText = (EditText) findViewById(R.id.editText1); button = (Button) findViewById(R.id.button1); button.setOnClickListener(new View.OnClickListener() { public void onClick(View p1) { passw = editText.getText().toString(); if (passw.equals("kev")) { Toast.makeText(MainActivity.this, "corrrect " + passw, Toast.LENGTH_SHORT).show(); startActivity(new Intent(MainActivity.this,NextActivity.class)); } else { Toast.makeText(MainActivity.this, "incorrect " + passw, Toast.LENGTH_SHORT).show(); } } }); } } </code></pre> <p>activity_main.xml</p> <pre><code>&lt;RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" android:paddingBottom="@dimen/activity_vertical_margin" android:paddingLeft="@dimen/activity_horizontal_margin" android:paddingRight="@dimen/activity_horizontal_margin" android:paddingTop="@dimen/activity_vertical_margin" tools:context=".MainActivity" &gt; &lt;EditText android:id="@+id/editText1" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignParentLeft="true" android:layout_alignParentRight="true" android:layout_alignParentTop="true" android:layout_marginTop="20dp" android:ems="10" android:inputType="textPassword" &gt; &lt;requestFocus /&gt; &lt;/EditText&gt; &lt;TextView android:id="@+id/textView1" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignLeft="@+id/editText1" android:layout_alignParentTop="true" android:layout_marginLeft="83dp" android:text="Password" /&gt; &lt;Button android:id="@+id/button1" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignLeft="@+id/textView1" android:layout_alignParentBottom="true" android:layout_marginLeft="39dp" android:text="Button" /&gt; &lt;/RelativeLayout&gt; </code></pre> <p>NextActivity.java</p> <pre><code>public class NextActivity extends Activity { Button button2; TextView textView2; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.next); textView2 = (TextView) findViewById(R.id.textView1); textView2.setText("Welcome Kevin"); button2 = (Button) findViewById(R.id.button1); button2.setOnClickListener(new OnClickListener(){ public void onClick(View p1) { textView2.setText("button clicked"); } }); } } </code></pre> <p>next.xml</p> <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt; &lt;RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical" &gt; &lt;TextView android:id="@+id/textView1" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_centerHorizontal="true" android:layout_centerVertical="true" android:text="TextView" /&gt; &lt;Button android:id="@+id/button1" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignLeft="@+id/textView1" android:layout_alignParentBottom="true" android:text="Button" /&gt; &lt;/RelativeLayout&gt; </code></pre> <p>Manifest.xml</p> <pre><code> &lt;activity android:name="com.example.MainActivity" android:label="@string/app_name" &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="com.example.NextActivity" android:label="@string/app_name" &gt; &lt;/activity&gt; </code></pre>
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    1. COI tried everything, seems like it crashes my app when I use the intent. (Running on Galaxy Note)
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    2. COyou should make entry for the activity in manifest file have you done that?
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    3. CODone that. <activity android:name=".nextActivity" > </activity>
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Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

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