SplashscreenActivity随笔

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) */@Overrideprotected 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() {@Overridepublic void run() {findViewById(R.id.splashlayout).startAnimation(endAnimation);}};endAnimation.setAnimationListener(new AnimationListener() {@Overridepublic void onAnimationStart(Animation animation) {}@Overridepublic void onAnimationRepeat(Animation animation) { }@Overridepublic 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() {@Overridepublic 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);}}}

动画xml文件

<?xml version="1.0" encoding="utf-8"?><set xmlns:android="http://schemas.android.com/apk/res/android"android:zAdjustment="bottom" android:fillAfter="false"><alpha android:fromAlpha="1.0" android:toAlpha="0"android:duration="400" /></set>

1、Animation类的使用

①定义好xml资源文件

②load

endAnimation = AnimationUtils.loadAnimation(this, R.anim.fade_out);endAnimation.setFillAfter(true);//if true, the transformation that this animation performed will persist when it is finished.

③startAnimation，只要是View就可以用

findViewById(R.id.splashlayout).startAnimation(endAnimation);

④若要对动画的状态做处理，只要设置setAnimationListener即可。

endAnimation.setAnimationListener(new AnimationListener() {@Overridepublic void onAnimationStart(Animation animation) {}@Overridepublic void onAnimationRepeat(Animation animation) { }@Overridepublic void onAnimationEnd(Animation animation) {}});

2、若只想延时来做某个动作，只要用Handler类的postDelayed即可

Handler  endAnimationHandler = new Handler();endAnimationHandler.removeCallbacks(endAnimationRunnable);endAnimationHandler.postDelayed(endAnimationRunnable, 2000);

3、PreferenceManager首选项的使用

PreferenceManager类似于VC下的ini配置文件

SharedPreferences mPerferences = PreferenceManager.getDefaultSharedPreferences(this);               //read          int counter = mPerferences.getInt("counter", 0);                      Log.i("zxd", "This app has been started " + counter + " times.");                                //write          SharedPreferences.Editor mEditor = mPerferences.edit();               mEditor.putInt("counter", ++counter);               mEditor.commit();