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POAndroid activity error
 

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  1. POAndroid activity error
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    <p>I am newbie in android. In android I trying to run a simple work. From my main.xml(http://pastebin.com/Mhgmpj4w) I have one button( my main.java(http://pastebin.com/b5irLVTc) ) it will switch to another activity the second.xml(http://pastebin.com/F92VxSEZ) where it will show some text ( my second.java(http://pastebin.com/MR3L5WXL) ) but there are some errors(http://pastebin.com/KH2wDh7b). I am a newbie please help me.</p> <p><strong>main.xml</strong>:</p> <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt; &lt;LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="fill_parent" android:layout_height="fill_parent" android:orientation="vertical" &gt; &lt;Button android:id="@+id/button1" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="Button" /&gt; &lt;/LinearLayout&gt; </code></pre> <p><strong>main.java:</strong></p> <pre><code> package com.rana.activities; import android.app.Activity; import android.content.Intent; import android.os.Bundle; import android.view.View; import android.view.View.OnClickListener; import android.widget.Button; public class Main extends Activity { /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); Button b = (Button) findViewById(android.R.id.button1); b.setOnClickListener(new OnClickListener() { public void onClick(View v) { startActivity(new Intent(Main.this, Second.class)); } }); } } </code></pre> <p><strong>second.xml:</strong></p> <pre><code> &lt;?xml version="1.0" encoding="utf-8"?&gt; &lt;LinearLayout 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:text="This is the second activity" /&gt; &lt;/LinearLayout&gt; </code></pre> <p><strong>second.java:</strong></p> <pre><code> package com.rana.activities; import android.app.Activity; import android.os.Bundle; public class Second extends Activity { @Override protected void onCreate(Bundle savedInstanceState) { // TODO Auto-generated method stub super.onCreate(savedInstanceState); setContentView(R.layout.second); } } </code></pre> <p><strong>logcat:</strong></p> <pre><code> 10-29 19:19:25.377: D/AndroidRuntime(859): Shutting down VM 10-29 19:19:25.377: W/dalvikvm(859): threadid=1: thread exiting with uncaught exception (group=0x40015560) 10-29 19:19:25.397: E/AndroidRuntime(859): FATAL EXCEPTION: main 10-29 19:19:25.397: E/AndroidRuntime(859): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.rana.activities/com.rana.activities.Main}: java.lang.NullPointerException 10-29 19:19:25.397: E/AndroidRuntime(859): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1647) 10-29 19:19:25.397: E/AndroidRuntime(859): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1663) 10-29 19:19:25.397: E/AndroidRuntime(859): at android.app.ActivityThread.access$1500(ActivityThread.java:117) 10-29 19:19:25.397: E/AndroidRuntime(859): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:931) 10-29 19:19:25.397: E/AndroidRuntime(859): at android.os.Handler.dispatchMessage(Handler.java:99) 10-29 19:19:25.397: E/AndroidRuntime(859): at android.os.Looper.loop(Looper.java:123) 10-29 19:19:25.397: E/AndroidRuntime(859): at android.app.ActivityThread.main(ActivityThread.java:3683) 10-29 19:19:25.397: E/AndroidRuntime(859): at java.lang.reflect.Method.invokeNative(Native Method) 10-29 19:19:25.397: E/AndroidRuntime(859): at java.lang.reflect.Method.invoke(Method.java:507) 10-29 19:19:25.397: E/AndroidRuntime(859): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839) 10-29 19:19:25.397: E/AndroidRuntime(859): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597) 10-29 19:19:25.397: E/AndroidRuntime(859): at dalvik.system.NativeStart.main(Native Method) 10-29 19:19:25.397: E/AndroidRuntime(859): Caused by: java.lang.NullPointerException 10-29 19:19:25.397: E/AndroidRuntime(859): at com.rana.activities.Main.onCreate(Main.java:18) 10-29 19:19:25.397: E/AndroidRuntime(859): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047) 10-29 19:19:25.397: E/AndroidRuntime(859): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1611) 10-29 19:19:25.397: E/AndroidRuntime(859): ... 11 more &lt;-------LogCat-------------------&gt; </code></pre>
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    1. USARIF MAHMUD RANA
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    1. COPlease accept the ans if it has solve the problem. and close the question
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      1. POAndroid activity error
      1. USDinesh Prajapati
 

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