代码如下：

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);
   }
}