title: Android - Activity constructor
body: <p>I noticed that using the shortcut <code>Alt + Insert</code> and selecting the builders, it tries to create a constructor with each private property (e.g. <code>cManager</code> and <code>mTextView</code>). I remember I already created projects without it and worked correctly.</p>
  
  <p>The error happens when I run the application, following the full logcat and the <code>Activity</code> constructor:</p>
  
  <p>Constructor with private property:</p>
  
  <pre><code>private ConnectivityManager cManager;
  private TextView mTextView;
  
  public SplashScreenActivity() {
      this.cManager = (ConnectivityManager) this.getSystemService(Context.CONNECTIVITY_SERVICE);
      this.mTextView = (TextView)this.findViewById(R.id.mProgressText);
  }
  </code></pre>
  
  <p>Logcat:</p>
  
  <pre><code>02-20 18:20:56.155    1591-1591/com.universo91.towersrock I/art﹕ Not late-enabling -Xcheck:jni (already on)
  02-20 18:20:58.355    1591-1591/com.universo91.towersrock D/AndroidRuntime﹕ Shutting down VM
      --------- beginning of crash
  02-20 18:20:58.361    1591-1591/com.universo91.towersrock E/AndroidRuntime﹕ FATAL EXCEPTION: main
      Process: com.universo91.towersrock, PID: 1591
      java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{com.universo91.towersrock/com.universo91.towersrock.Pages.SplashScreenActivity}: java.lang.InstantiationException: class com.universo91.towersrock.Pages.SplashScreenActivity has no zero argument constructor
              at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2209)
              at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2360)
              at android.app.ActivityThread.access$800(ActivityThread.java:144)
              at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1278)
              at android.os.Handler.dispatchMessage(Handler.java:102)
              at android.os.Looper.loop(Looper.java:135)
              at android.app.ActivityThread.main(ActivityThread.java:5221)
              at java.lang.reflect.Method.invoke(Native Method)
              at java.lang.reflect.Method.invoke(Method.java:372)
              at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:899)
              at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:694)
       Caused by: java.lang.InstantiationException: class com.universo91.towersrock.Pages.SplashScreenActivity has no zero argument constructor
              at java.lang.Class.newInstance(Class.java:1563)
              at android.app.Instrumentation.newActivity(Instrumentation.java:1065)
              at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2199)
              at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2360)
              at android.app.ActivityThread.access$800(ActivityThread.java:144)
              at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1278)
              at android.os.Handler.dispatchMessage(Handler.java:102)
              at android.os.Looper.loop(Looper.java:135)
              at android.app.ActivityThread.main(ActivityThread.java:5221)
              at java.lang.reflect.Method.invoke(Native Method)
              at java.lang.reflect.Method.invoke(Method.java:372)
              at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:899)
              at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:694)
       Caused by: java.lang.NoSuchMethodException: &lt;init&gt; []
              at java.lang.Class.getConstructor(Class.java:531)
              at java.lang.Class.getDeclaredConstructor(Class.java:510)
              at java.lang.Class.newInstance(Class.java:1561)
              at android.app.Instrumentation.newActivity(Instrumentation.java:1065)
              at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2199)
              at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2360)
              at android.app.ActivityThread.access$800(ActivityThread.java:144)
              at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1278)
              at android.os.Handler.dispatchMessage(Handler.java:102)
              at android.os.Looper.loop(Looper.java:135)
              at android.app.ActivityThread.main(ActivityThread.java:5221)
              at java.lang.reflect.Method.invoke(Native Method)
              at java.lang.reflect.Method.invoke(Method.java:372)
              at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:899)
              at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:694)
  02-20 18:20:58.772    1591-1603/com.universo91.towersrock I/art﹕ Background sticky concurrent mark sweep GC freed 1747(114KB) AllocSpace objects, 0(0B) LOS objects, 37% free, 391KB/623KB, paused 825us total 382.655ms
  02-20 18:21:29.824    1690-1690/com.universo91.towersrock D/AndroidRuntime﹕ Shutting down VM
  02-20 18:21:29.829    1690-1690/com.universo91.towersrock E/AndroidRuntime﹕ FATAL EXCEPTION: main
      Process: com.universo91.towersrock, PID: 1690
      java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{com.universo91.towersrock/com.universo91.towersrock.Pages.SplashScreenActivity}: java.lang.InstantiationException: class com.universo91.towersrock.Pages.SplashScreenActivity has no zero argument constructor
              at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2209)
              at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2360)
              at android.app.ActivityThread.access$800(ActivityThread.java:144)
              at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1278)
              at android.os.Handler.dispatchMessage(Handler.java:102)
              at android.os.Looper.loop(Looper.java:135)
              at android.app.ActivityThread.main(ActivityThread.java:5221)
              at java.lang.reflect.Method.invoke(Native Method)
              at java.lang.reflect.Method.invoke(Method.java:372)
              at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:899)
              at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:694)
       Caused by: java.lang.InstantiationException: class com.universo91.towersrock.Pages.SplashScreenActivity has no zero argument constructor
              at java.lang.Class.newInstance(Class.java:1563)
              at android.app.Instrumentation.newActivity(Instrumentation.java:1065)
              at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2199)
              at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2360)
              at android.app.ActivityThread.access$800(ActivityThread.java:144)
              at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1278)
              at android.os.Handler.dispatchMessage(Handler.java:102)
              at android.os.Looper.loop(Looper.java:135)
              at android.app.ActivityThread.main(ActivityThread.java:5221)
              at java.lang.reflect.Method.invoke(Native Method)
              at java.lang.reflect.Method.invoke(Method.java:372)
              at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:899)
              at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:694)
       Caused by: java.lang.NoSuchMethodException: &lt;init&gt; []
              at java.lang.Class.getConstructor(Class.java:531)
              at java.lang.Class.getDeclaredConstructor(Class.java:510)
              at java.lang.Class.newInstance(Class.java:1561)
              at android.app.Instrumentation.newActivity(Instrumentation.java:1065)
              at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2199)
              at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2360)
              at android.app.ActivityThread.access$800(ActivityThread.java:144)
              at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1278)
              at android.os.Handler.dispatchMessage(Handler.java:102)
              at android.os.Looper.loop(Looper.java:135)
              at android.app.ActivityThread.main(ActivityThread.java:5221)
              at java.lang.reflect.Method.invoke(Native Method)
              at java.lang.reflect.Method.invoke(Method.java:372)
              at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:899)
              at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:694)
  02-20 18:21:30.168    1690-1702/com.universo91.towersrock I/art﹕ Background sticky concurrent mark sweep GC freed 1749(114KB) AllocSpace objects, 0(0B) LOS objects, 37% free, 391KB/623KB, paused 856us total 166.355ms
  02-20 18:21:53.341    1690-1690/com.universo91.towersrock I/Process﹕ Sending signal. PID: 1690 SIG: 9
  02-20 18:26:00.878    1754-1754/com.universo91.towersrock D/AndroidRuntime﹕ Shutting down VM
  02-20 18:26:00.903    1754-1754/com.universo91.towersrock E/AndroidRuntime﹕ FATAL EXCEPTION: main
      Process: com.universo91.towersrock, PID: 1754
      java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{com.universo91.towersrock/com.universo91.towersrock.Pages.SplashScreenActivity}: java.lang.IllegalStateException: System services not available to Activities before onCreate()
              at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2209)
              at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2360)
              at android.app.ActivityThread.access$800(ActivityThread.java:144)
              at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1278)
              at android.os.Handler.dispatchMessage(Handler.java:102)
              at android.os.Looper.loop(Looper.java:135)
              at android.app.ActivityThread.main(ActivityThread.java:5221)
              at java.lang.reflect.Method.invoke(Native Method)
              at java.lang.reflect.Method.invoke(Method.java:372)
              at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:899)
              at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:694)
       Caused by: java.lang.IllegalStateException: System services not available to Activities before onCreate()
              at android.app.Activity.getSystemService(Activity.java:4989)
              at com.universo91.towersrock.Pages.SplashScreenActivity.&lt;init&gt;(SplashScreenActivity.java:24)
              at java.lang.reflect.Constructor.newInstance(Native Method)
              at java.lang.Class.newInstance(Class.java:1572)
              at android.app.Instrumentation.newActivity(Instrumentation.java:1065)
              at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2199)
              at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2360)
              at android.app.ActivityThread.access$800(ActivityThread.java:144)
              at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1278)
              at android.os.Handler.dispatchMessage(Handler.java:102)
              at android.os.Looper.loop(Looper.java:135)
              at android.app.ActivityThread.main(ActivityThread.java:5221)
              at java.lang.reflect.Method.invoke(Native Method)
              at java.lang.reflect.Method.invoke(Method.java:372)
              at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:899)
              at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:694)
  02-20 18:26:01.144    1754-1766/com.universo91.towersrock I/art﹕ Background sticky concurrent mark sweep GC freed 1745(118KB) AllocSpace objects, 0(0B) LOS objects, 38% free, 382KB/623KB, paused 950us total 131.218ms
  02-20 18:26:04.429    1754-1754/com.universo91.towersrock I/Process﹕ Sending signal. PID: 1754 SIG: 9
  </code></pre>