title: App crashes when opened in emulator
body: <p>Whenever I try to run this app in the emulator it always crashes and I can't figure out why!</p>
  
  <p>P.S. I am very new to Android app development so I probably made about a dozen mistakes already so please be understanding!</p>
  
  <p>Logcat:</p>
  
  <pre><code>06-29 01:16:30.719      392-406/system_process I/Choreographer﹕ Skipped 41 frames!  The application may be doing too much work on its main thread.
  06-29 01:16:30.889    1195-1195/com.trial.contactmanager I/Process﹕ Sending signal. PID: 1195 SIG: 9
  06-29 01:16:30.929      392-436/system_process E/SoundPool﹕ error loading /system/media/audio/ui/Effect_Tick.ogg
  06-29 01:16:30.929      392-436/system_process W/AudioService﹕ Soundpool could not load file: /system/media/audio/ui/Effect_Tick.ogg
  06-29 01:16:30.929      392-436/system_process E/SoundPool﹕ error loading /system/media/audio/ui/Effect_Tick.ogg
  06-29 01:16:30.929      392-436/system_process W/AudioService﹕ Soundpool could not load file: /system/media/audio/ui/Effect_Tick.ogg
  06-29 01:16:30.929      392-436/system_process E/SoundPool﹕ error loading /system/media/audio/ui/Effect_Tick.ogg
  06-29 01:16:30.929      392-436/system_process W/AudioService﹕ Soundpool could not load file: /system/media/audio/ui/Effect_Tick.ogg
  06-29 01:16:30.929      392-436/system_process E/SoundPool﹕ error loading /system/media/audio/ui/Effect_Tick.ogg
  06-29 01:16:30.929      392-436/system_process W/AudioService﹕ Soundpool could not load file: /system/media/audio/ui/Effect_Tick.ogg
  06-29 01:16:30.939      392-436/system_process E/SoundPool﹕ error loading /system/media/audio/ui/Effect_Tick.ogg
  06-29 01:16:30.939      392-436/system_process W/AudioService﹕ Soundpool could not load file: /system/media/audio/ui/Effect_Tick.ogg
  06-29 01:16:30.939      392-436/system_process E/SoundPool﹕ error loading /system/media/audio/ui/KeypressStandard.ogg
  06-29 01:16:30.939      392-436/system_process W/AudioService﹕ Soundpool could not load file: /system/media/audio/ui/KeypressStandard.ogg
  06-29 01:16:30.939      392-436/system_process E/SoundPool﹕ error loading /system/media/audio/ui/KeypressSpacebar.ogg
  06-29 01:16:30.939      392-436/system_process W/AudioService﹕ Soundpool could not load file: /system/media/audio/ui/KeypressSpacebar.ogg
  06-29 01:16:30.939      392-436/system_process E/SoundPool﹕ error loading /system/media/audio/ui/KeypressDelete.ogg
  06-29 01:16:30.939      392-436/system_process W/AudioService﹕ Soundpool could not load file: /system/media/audio/ui/KeypressDelete.ogg
  06-29 01:16:30.939      392-436/system_process E/SoundPool﹕ error loading /system/media/audio/ui/KeypressReturn.ogg
  06-29 01:16:30.949      392-436/system_process W/AudioService﹕ Soundpool could not load file: /system/media/audio/ui/KeypressReturn.ogg
  06-29 01:16:30.949      392-436/system_process E/SoundPool﹕ error loading /system/media/audio/ui/KeypressInvalid.ogg
  06-29 01:16:30.949      392-436/system_process W/AudioService﹕ Soundpool could not load file: /system/media/audio/ui/KeypressInvalid.ogg
  06-29 01:16:30.949      392-436/system_process W/AudioService﹕ onLoadSoundEffects(), Error -1 while loading samples
  06-29 01:16:31.109      392-407/system_process I/Choreographer﹕ Skipped 58 frames!  The application may be doing too much work on its main thread.
  06-29 01:16:31.489      392-614/system_process I/ActivityManager﹕ Process com.trial.contactmanager (pid 1195) has died.
  06-29 01:16:31.559      392-404/system_process W/InputMethodManagerService﹕ Window already focused, ignoring focus gain of: com.android.internal.view.IInputMethodClient$Stub$Proxy@b420dad0 attribute=null, token = android.os.BinderProxy@b4023778
  06-29 01:30:01.049      392-431/system_process D/ConnectivityService﹕ Sampling interval elapsed, updating statistics ..
  06-29 01:30:01.059      392-431/system_process D/ConnectivityService﹕ Done.
  06-29 01:30:01.079      392-431/system_process D/ConnectivityService﹕ Setting timer for 720seconds
  </code></pre>
  
  <p>Here is my code:</p>
  
  <pre><code>package com.trial.contactmanager;
  
  import android.app.Activity;
  import android.app.ActionBar;
  import android.app.Fragment;
  import android.os.Bundle;
  import android.text.Editable;
  import android.text.TextWatcher;
  import android.view.LayoutInflater;
  import android.view.Menu;
  import android.view.MenuItem;
  import android.view.View;
  import android.view.ViewGroup;
  import android.os.Build;
  import android.widget.Button;
  import android.widget.EditText;
  import android.widget.TabHost;
  
  public class MainActivity extends Activity {
  
      EditText name, phone, email, address;
  
      @Override
      protected void onCreate(Bundle savedInstanceState) {
          super.onCreate(savedInstanceState);
          setContentView(R.layout.activity_main);
  
          if (savedInstanceState == null) {
              getFragmentManager().beginTransaction()
                      .add(R.id.container, new PlaceholderFragment())
                      .commit();
          }
  
          name = (EditText) findViewById(R.id.name);
          phone = (EditText) findViewById(R.id.phone);
          email = (EditText) findViewById(R.id.email);
          address = (EditText) findViewById(R.id.address);
          final Button add_btn = (Button) findViewById(R.id.add_btn);
          TabHost tabHost = (TabHost) findViewById(R.id.tabHost);
  
  
          tabHost.setup();
  
          TabHost.TabSpec tabSpec = tabHost.newTabSpec("creator");
          tabSpec.setContent(R.id.tabCreate);
          tabSpec.setIndicator("Creator");
          tabHost.addTab(tabSpec);
  
  
          tabSpec = tabHost.newTabSpec("list");
          tabSpec.setContent(R.id.tabList);
          tabSpec.setIndicator("List");
          tabHost.addTab(tabSpec);
  
  
  
  
  
  
  
          name.addTextChangedListener(new TextWatcher() {
              @Override
              public void beforeTextChanged(CharSequence charSequence, int i, int i2, int i3) {
  
              }
  
              @Override
              public void onTextChanged(CharSequence charSequence, int i, int i2, int i3) {
                  add_btn.setEnabled(!name.getText().toString().trim().isEmpty());
  
              }
  
              @Override
              public void afterTextChanged(Editable editable) {
  
              }
          });
      }
  
  
      @Override
      public boolean onCreateOptionsMenu(Menu menu) {
  
          // Inflate the menu; this adds items to the action bar if it is present.
          getMenuInflater().inflate(R.menu.main, menu);
          return true;
      }
  
      @Override
      public boolean onOptionsItemSelected(MenuItem item) {
  
          int id = item.getItemId();
          if (id == R.id.action_settings) {
              return true;
          }
          return super.onOptionsItemSelected(item);
      }
  
      /**
       * A placeholder fragment containing a simple view.
       */
      public static class PlaceholderFragment extends Fragment {
  
          public PlaceholderFragment() {
          }
  
          @Override
          public View onCreateView(LayoutInflater inflater, ViewGroup container,
                  Bundle savedInstanceState) {
              View rootView = inflater.inflate(R.layout.fragment_main, container, false);
              return rootView;
          }
      }
  
  }
  </code></pre>