public class BaseActivity extends Activity { 
protected boolean isDestroy; 
//防止重复点击设置的标志，涉及到点击打开其他Activity时，将该标志设置为false，在onResume事件中设置为true 
private boolean clickable=true; 
@Override 
protected void onCreate(Bundle savedInstanceState) { 
super.onCreate(savedInstanceState); 
isDestroy=false; 
requestWindowFeature(Window.FEATURE_NO_TITLE); 
setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT); 
} 
@Override 
protected void onDestroy() { 
super.onDestroy(); 
isDestroy=true; 
} 
@Override 
protected void onResume() { 
super.onResume(); 
//每次返回界面时，将点击标志设置为可点击 
clickable=true; 
} 
/** 
* 当前是否可以点击 
* @return 
*/ 
protected boolean isClickable(){ 
return clickable; 
} 
/** 
* 锁定点击 
*/ 
protected void lockClick(){ 
clickable=false; 
} 
@Override 
public void startActivityForResult(Intent intent, int requestCode, Bundle options) { 
if(isClickable()) { 
lockClick(); 
super.startActivityForResult(intent, requestCode,options); 
} 
} 
}