package com.example.testhockeyapp; import net.hockeyapp.android.CrashManager; import net.hockeyapp.android.CrashManagerListener; import net.hockeyapp.android.UpdateManager; import android.os.Bundle; import android.app.Activity; import android.view.Menu; import android.view.View; import android.view.View.OnClickListener; import android.widget.Button; import android.widget.Toast; public class MainActivity extends Activity {  private static final String App_ID = "a7ab0fe5f11edc8afbfbc842ecc38ad7";  String a = null;  @Override  protected void onCreate(Bundle savedInstanceState) {   super.onCreate(savedInstanceState);   setContentView(R.layout.activity_main);   Button button = (Button) findViewById(R.id.button1);   button.setOnClickListener(new OnClickListener() {    @Override    public void onClick(View v) {    a.charAt(23);    }   });    checkForUpdates();  }  @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  protected void onResume() {   // TODO Auto-generated method stub   super.onResume();   checkForCrashes();  }  private void checkForCrashes() {   CrashManager.register(this, App_ID, new CrashManagerListener() {    @Override    public void onCrashesSent() {     super.onCrashesSent();     runOnUiThread(new Runnable() {      @Override      public void run() {       Toast.makeText(getApplicationContext(),         "Crash data was sent. Thanks!",         Toast.LENGTH_LONG).show();      }     });    }    @Override    public void onCrashesNotSent() {     super.onCrashesNotSent();     runOnUiThread(new Runnable() {      @Override      public void run() {       Toast.makeText(         getApplicationContext(),         "Crash data failed to sent. Please try again later.",         Toast.LENGTH_LONG).show();      }     });    }   });  }    private void checkForUpdates() {      // Remove this for store builds!      UpdateManager.register(this, App_ID);    } }