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POAndroid Application not running (Error : Application stopped running unexpectedly. Please Try Again)
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  1. POAndroid Application not running (Error : Application stopped running unexpectedly. Please Try Again)
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    copied!<p>This is the manifest file </p> <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt; &lt;manifest xmlns:android="http://schemas.android.com/apk/res/android" package="net.learn2develop.SMSMessaging" android:versionCode="1" android:versionName="1.0"&gt; &lt;uses-sdk android:minSdkVersion="10" /&gt; &lt;uses-permission android:name="android.permission.SEND_SMS"&gt;&lt;/uses-permission&gt; &lt;uses-permission android:name="android.permission.RECEIVE_SMS"&gt;&lt;/uses-permission&gt; &lt;application android:icon="@drawable/icon" android:label="@string/app_name"&gt; &lt;activity android:name=".SMS" 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;/application&gt; &lt;/manifest&gt; </code></pre> <p>This is the XML file (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:orientation="vertical" android:layout_width="fill_parent" android:layout_height="fill_parent" &gt; &lt;TextView android:layout_width="fill_parent" android:layout_height="wrap_content" android:text="Enter the phone number of recipient" /&gt; &lt;EditText android:id="@+id/txtPhoneNo" android:layout_width="fill_parent" android:layout_height="wrap_content" /&gt; &lt;TextView android:layout_width="fill_parent" android:layout_height="wrap_content" android:text="Message" /&gt; &lt;EditText android:id="@+id/txtMessage" android:layout_width="fill_parent" android:layout_height="150px" android:gravity="top" /&gt; &lt;Button android:id="@+id/btnSendSMS" android:layout_width="fill_parent" android:layout_height="wrap_content" android:text="Send SMS" /&gt; &lt;/LinearLayout&gt; </code></pre> <p>This is the java file (SMS.java):-</p> <pre><code>package net.learn2develop.SMSMessaging; import android.app.Activity; import android.app.PendingIntent; import android.content.Intent; import android.os.Bundle; import android.view.View; import android.widget.Button; import android.widget.EditText; import android.widget.Toast; import android.telephony.SmsManager; public class SMS extends Activity { Button btnSendSMS; EditText txtPhoneNo; EditText txtMessage; /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); btnSendSMS = (Button) findViewById(R.id.btnSendSMS); txtPhoneNo = (EditText) findViewById(R.id.txtPhoneNo); txtMessage = (EditText) findViewById(R.id.txtMessage); btnSendSMS.setOnClickListener(new View.OnClickListener() { public void onClick(View v) { String phoneNo = txtPhoneNo.getText().toString(); String message = txtMessage.getText().toString(); if (phoneNo.length()&gt;0 &amp;&amp; message.length()&gt;0) { sendSMS(phoneNo, message); } else { Toast.makeText(getBaseContext(), "Please enter both phone number and message.", Toast.LENGTH_SHORT).show(); } } }); } private void sendSMS(String phoneNumber, String message) { PendingIntent pi = PendingIntent.getActivity(this, 0, new Intent(this, SMS.class), 0); SmsManager sms = SmsManager.getDefault(); sms.sendTextMessage(phoneNumber, null, message, pi, null); } } </code></pre> <p>The error portion :-</p> <pre><code>08-26 23:06:41.040: ERROR/AndroidRuntime(411): FATAL EXCEPTION: main 08-26 23:06:41.040: ERROR/AndroidRuntime(411): java.lang.RuntimeException: Unable to start activity ComponentInfo{net.learn2develop.SMSMessaging/net.learn2develop.SMSMessaging.SMS}: java.lang.NullPointerException 08-26 23:06:41.040: ERROR/AndroidRuntime(411): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1647) 08-26 23:06:41.040: ERROR/AndroidRuntime(411): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1663) 08-26 23:06:41.040: ERROR/AndroidRuntime(411): at android.app.ActivityThread.access$1500(ActivityThread.java:117) 08-26 23:06:41.040: ERROR/AndroidRuntime(411): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:931) 08-26 23:06:41.040: ERROR/AndroidRuntime(411): at android.os.Handler.dispatchMessage(Handler.java:99) 08-26 23:06:41.040: ERROR/AndroidRuntime(411): at android.os.Looper.loop(Looper.java:123) 08-26 23:06:41.040: ERROR/AndroidRuntime(411): at android.app.ActivityThread.main(ActivityThread.java:3683) 08-26 23:06:41.040: ERROR/AndroidRuntime(411): at java.lang.reflect.Method.invokeNative(Native Method) 08-26 23:06:41.040: ERROR/AndroidRuntime(411): at java.lang.reflect.Method.invoke(Method.java:507) 08-26 23:06:41.040: ERROR/AndroidRuntime(411): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839) 08-26 23:06:41.040: ERROR/AndroidRuntime(411): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597) 08-26 23:06:41.040: ERROR/AndroidRuntime(411): at dalvik.system.NativeStart.main(Native Method) 08-26 23:06:41.040: ERROR/AndroidRuntime(411): Caused by: java.lang.NullPointerException 08-26 23:06:41.040: ERROR/AndroidRuntime(411): at net.learn2develop.SMSMessaging.SMS.onCreate(SMS.java:31) 08-26 23:06:41.040: ERROR/AndroidRuntime(411): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047) 08-26 23:06:41.040: ERROR/AndroidRuntime(411): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1611) 08-26 23:06:41.040: ERROR/AndroidRuntime(411): ... 11 more </code></pre>
 

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