[java]
package com.example.settitle;

import android.os.Bundle;
import android.app.Activity;
import android.util.Log;

public class MainActivity extends Activity {

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
setTitle("窗口标题");
}

@Override
protected void onPause() {
// TODO Auto-generated method stub
Log.d("onResume","focus has miss");
super.onPause();
}

@Override
public void onWindowFocusChanged(boolean hasFocus) {
// TODO Auto-generated method stub
Log.d("onWindwosFocusChanged",hasFocus ? "focus catch" : "focus miss");
super.onWindowFocusChanged(hasFocus);
}

@Override
protected void onResume() {
// TODO Auto-generated method stub
Log.d("onResume","focus has catch");
super.onResume();
}

}
[/java]
其中，onWindowFocusChanged方法与生命周期调用的方法没有直接关系，此方法会在onResume或者onPause方法后调用。