android 项目学习随笔一（闪屏 ）

1、取标题栏且全屏

<activity
android:name="com.ecollab.zhsh66.SplashActivity"
android:label="@string/app_name"
android:theme="@android:style/Theme.Black.NoTitleBar.Fullscreen" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />

<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>

2、代码取掉标题

requestWindowFeature(Window.FEATURE_NO_TITLE);必须在setContentView(R.layout.activity_main);之前执行

3、整体旋转、缩放、渐变

public class SplashActivity extends Activity {    private RelativeLayout rlRoot;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_splash);        rlRoot = (RelativeLayout) findViewById(R.id.rl_root);        // 旋转, 缩放, 渐变        // 旋转        RotateAnimation animRotate = new RotateAnimation(0, 360,                Animation.RELATIVE_TO_SELF, 0.5f, Animation.RELATIVE_TO_SELF,                0.5f);        animRotate.setDuration(1000);        animRotate.setFillAfter(true);        // 缩放        ScaleAnimation animScale = new ScaleAnimation(0, 1, 0, 1,                Animation.RELATIVE_TO_SELF, 0.5f, Animation.RELATIVE_TO_SELF,                0.5f);        animScale.setDuration(1000);        animScale.setFillAfter(true);        // 渐变        AlphaAnimation animAlpha = new AlphaAnimation(0, 1);        animAlpha.setDuration(2000);        animAlpha.setFillAfter(true);        // 动画集合        AnimationSet animSet = new AnimationSet(true);        animSet.addAnimation(animRotate);        animSet.addAnimation(animScale);        animSet.addAnimation(animAlpha);        rlRoot.startAnimation(animSet);        animSet.setAnimationListener(new AnimationListener() {            @Override            public void onAnimationStart(Animation animation) {            }            @Override            public void onAnimationRepeat(Animation animation) {            }            @Override            public void onAnimationEnd(Animation animation) {                // 判断是否需要跳到新手引导                boolean isGuideShow = PrefUtils.getBoolean("is_guide_show",                        false, getApplicationContext());                if (isGuideShow) {                    // 动画结束后跳主页面                    startActivity(new Intent(getApplicationContext(),                            MainActivity.class));                } else {                    // 跳到新手引导                    startActivity(new Intent(getApplicationContext(),                            GuideActivity.class));                }                finish();            }        });    }}

View Code

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools"    android:id="@+id/rl_root"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:background="@drawable/splash_bg_newyear" >    <ImageView        android:id="@+id/imageView1"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:layout_centerHorizontal="true"        android:layout_centerVertical="true"        android:src="@drawable/splash_horse_newyear" /></RelativeLayout>

View Code