启动界面

public class MainActivity extends Activity {    public  MainActivity() {   // TODO Auto-generated constructor stub   Log.e("TAG","MainActivity()");  }

 @Override  protected void onCreate(Bundle savedInstanceState) {   Log.e("TAG","onCreate()");   super.onCreate(savedInstanceState);   setContentView(R.layout.activity_main);  }  //  @Override  protected void onStart() {   Log.e("TAG","onStart()");   super.onStart();  }  @Override  protected void onResume() {   Log.e("TAG","onResume()");   super.onResume();  }  @Override  protected void onPause() {   Log.e("TAG","onPause()");   super.onPause();  }  @Override  protected void onStop() {   Log.e("TAG","onStop0()");   super.onStop();  }  @Override  protected void onDestroy() {   Log.e("TAG","onDestroy()");   super.onDestroy();  }  @Override  protected void onRestart() {   Log.e("TAG","onRestart()");   super.onRestart();  }  public void startSecond(View v){   startActivity(new Intent(this,SecondActivity.class));  }