整个程序的入口Activity从Manifest里面可以找到是SplashscreenActivity，界面截图如下：
程序的代码如下：
public class SplashscreenActivity extends Activity {
public final static String FIRST_RUN_PREFERENCE = "first_run";
private Animation endAnimation;
private Handler endAnimationHandler;
private Runnable endAnimationRunnable;
/* (non-Javadoc)
* @see android.app.Activity#onCreate(android.os.Bundle)
*/
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_NO_TITLE);
setContentView(R.layout.splashscreen);
findViewById(R.id.splashlayout);
endAnimation = AnimationUtils.loadAnimation(this, R.anim.fade_out);
endAnimation.setFillAfter(true);
endAnimationHandler = new Handler();
endAnimationRunnable = new Runnable() {
@Override
public void run() {
findViewById(R.id.splashlayout).startAnimation(endAnimation);
}
};
endAnimation.setAnimationListener(new AnimationListener() {
@Override
public void onAnimationStart(Animation animation) { }
@Override
public void onAnimationRepeat(Animation animation) { }
@Override
public void onAnimationEnd(Animation animation) {
HomeActivity.launch(SplashscreenActivity.this);
SplashscreenActivity.this.finish();
}
});
showTutorial();
}
final void showTutorial() {
boolean showTutorial = PreferenceManager.getDefaultSharedPreferences(this).getBoolean(FIRST_RUN_PREFERENCE, true);
if (showTutorial) {
final TutorialDialog dlg = new TutorialDialog(this);
dlg.setOnDismissListener(new DialogInterface.OnDismissListener() {
@Override
public void onDismiss(DialogInterface dialog) {
CheckBox cb = (CheckBox) dlg.findViewById(R.id.toggleFirstRun);
if (cb != null && cb.isChecked()) {
SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(SplashscreenActivity.this);
prefs.edit().putBoolean(FIRST_RUN_PREFERENCE, false).commit();
}
endAnimationHandler.removeCallbacks(endAnimationRunnable);
endAnimationHandler.postDelayed(endAnimationRunnable, 2000);
}
});
dlg.show();
} else {
endAnimationHandler.removeCallbacks(endAnimationRunnable);
endAnimationHandler.postDelayed(endAnimationRunnable, 1500);
}
}
}
备注一：SharedPreferences的保存
SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(SplashscreenActivity.this);
prefs.edit().putBoolean(FIRST_RUN_PREFERENCE, false).commit();
刚开始的时候以为传入的是SplashscreenActivity，那么生成的那个xml文件的名字应该是和这个activity有关才对，手机没有root权限所以通脱调试看到不是这样的
看以看到是和整个程序的包名有关，现在明白其实这个函数的参数只要是传入的是属于这个程序的context的对象就可以。
再有就是对于何时判断实现这个对话框的判断，刚开始想在onCreate()里面判断是不是显示不是更好，后来发现这样做不好，程序的封装行就被破坏了，我要处理是不是显示对话框，onCreate()只要调用一个函数就可以了,不管你在你在里面是怎样处理的是显示还是不显示。
备注二：动画的处理
如果这个动画让我处理的话可能就是执行动画然后，执行完了跳到对应的activity中去。而在这里是用Handler和Runnable来处理的。
endAnimationHandler.removeCallbacks(endAnimationRunnable);
endAnimationHandler.postDelayed(endAnimationRunnable, 1500);
API中的解释：
void android.os.Handler.removeCallbacks(Runnable r)
Remove any pending posts of Runnable r that are in the message queue.
Causes the Runnable r to be added to the message queue, to be run after the specified amount of time elapses. The runnable will be run on the thread to which this handler is attached.
- Parameters:
- r The Runnable that will be executed.
- delayMillis The delay (in milliseconds) until the Runnable will be executed.
- Returns:
- Returns true if the Runnable was successfully placed in to the message queue. Returns false on failure, usually because the looper processing the message queue is exiting. Note that a result of true does not mean the Runnable will be processed -- if the looper is quit before the delivery time of the message occurs then the message will be dropped.
HomeActivity.launch(SplashscreenActivity.this);
SplashscreenActivity.this.finish();
在HomeActivity里面这个launch是一个静态的函数：
/**
* Launch Home activity helper
*
* @param c context where launch home from (used by SplashscreenActivity)
*/
public static void launch(Context c){
Intent intent = new Intent(c, HomeActivity.class);
intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP );
c.startActivity(intent);
}
intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP );这里先留一个问题，查了一下还是没能太明白这个的准确意思
备注三：对dialog添加消失的监听事件
dlg.setOnDismissListener(new DialogInterface.OnDismissListener() {}
之前一直不知道有这么一个监听事件，以后可以在程序中使用到