1.viewpager

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="match_parent"    android:layout_height="match_parent" >    <android.support.v4.view.ViewPager        android:id="@+id/vp_guide"        android:layout_width="match_parent"        android:layout_height="match_parent" />    <Button        android:id="@+id/btn_start"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:layout_alignParentBottom="true"        android:layout_centerHorizontal="true"        android:layout_marginBottom="60dp"        android:background="@drawable/btn_guide_selector"        android:padding="5dp"//padding是从内往外撑        android:text="开始体验"        android:visibility="invisible"        android:textColor="@drawable/btn_guide_text_selector" />    <RelativeLayout        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:layout_alignParentBottom="true"        android:layout_centerHorizontal="true"        android:layout_marginBottom="20dp" >        <LinearLayout            android:id="@+id/ll_point_group"            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:orientation="horizontal" >        </LinearLayout>        <View            android:id="@+id/view_red_point"            android:layout_width="10dp"            android:layout_height="10dp"            android:background="@drawable/shape_point_red" />    </RelativeLayout></RelativeLayout>

//新建drawable目录，背景状态选择器<selector xmlns:android="http://schemas.android.com/apk/res/android">    <item android:drawable="@drawable/button_red_pressed" android:state_pressed="true"/>    <item android:drawable="@drawable/button_red_normal"/></selector>

//文字颜色选择器<selector xmlns:android="http://schemas.android.com/apk/res/android">    <item android:state_pressed="true" android:color="@android:color/black"/>    <item android:color="@android:color/white"/></selector>

//drawable目录下，形状选择器<shape xmlns:android="http://schemas.android.com/apk/res/android"    android:shape="oval" >    <solid android:color="#f00" /></shape><shape xmlns:android="http://schemas.android.com/apk/res/android"    android:shape="oval" >    <solid android:color="@android:color/darker_gray" /></shape>

一个LinearLayout 和 这个LinearLayout里边一个 TextView 的关系 TextView 就算LinearLayout的子视图 child view 。需要注意的是LayoutParams只是ViewGroup的一个内部类这里边这个也就是ViewGroup里边这个LayoutParams类是 base class 基类实际上每个不同的ViewGroup都有自己的LayoutParams子类

 //第一个参数为宽的设置，第二个参数为高的设置。              LinearLayout.LayoutParams p = new LinearLayout.LayoutParams(                         LinearLayout.LayoutParams.FILL_PARENT,                         LinearLayout.LayoutParams.WRAP_CONTENT                 );                 //调用addView()方法增加一个TextView到线性布局中              mLayout.addView(textView, p);                //比较简单的一个例子   /**<TextView 
           android:layout_width="fill_parent" 
           android:layout_height="wrap_content" 
           android:text="Text View"/>*/  效果一样

/** * 新手引导 *  * @author Kevin *  */public class GuideActivity extends Activity {	private static final int[] mImageIds = new int[] { R.drawable.guide_1,			R.drawable.guide_2, R.drawable.guide_3 };	private ViewPager vpGuide;	private ArrayList<ImageView> mImageViewList;	private LinearLayout llPointGroup;// 引导圆点的父控件	private int mPointWidth;// 圆点间的距离	private View viewRedPoint;// 小红点	private Button btnStart;// 开始体验	@Override	protected void onCreate(Bundle savedInstanceState) {		super.onCreate(savedInstanceState);		requestWindowFeature(Window.FEATURE_NO_TITLE);// 去掉标题		setContentView(R.layout.activity_guide);		vpGuide = (ViewPager) findViewById(R.id.vp_guide);		llPointGroup = (LinearLayout) findViewById(R.id.ll_point_group);		viewRedPoint = findViewById(R.id.view_red_point);		btnStart = (Button) findViewById(R.id.btn_start);		btnStart.setOnClickListener(new OnClickListener() {			@Override			public void onClick(View v) {				// 更新sp, 表示已经展示了新手引导				PrefUtils.setBoolean(GuideActivity.this,						"is_user_guide_showed", true);				// 跳转主页面				startActivity(new Intent(GuideActivity.this, MainActivity.class));				finish();			}		});		initViews();		vpGuide.setAdapter(new GuideAdapter());		vpGuide.setOnPageChangeListener(new GuidePageListener());	}	/**	 * 初始化界面	 */	private void initViews() {		mImageViewList = new ArrayList<ImageView>();		// 初始化引导页的3个页面		for (int i = 0; i < mImageIds.length; i++) {			ImageView image = new ImageView(this);			image.setBackgroundResource(mImageIds[i]);// 设置引导页背景,注意是Resource			mImageViewList.add(image);		}		// 初始化引导页的小圆点		for (int i = 0; i < mImageIds.length; i++) {			View point = new View(this);			point.setBackgroundResource(R.drawable.shape_point_gray);// 设置引导页默认圆点			LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(10, 10);//通过params设置布局的参数，括号里是宽高			if (i > 0) {				params.leftMargin = 10;// 设置圆点间隔			}			point.setLayoutParams(params);// 设置圆点的大小			llPointGroup.addView(point);// 将圆点添加给线性布局		}		// 获取视图树, 对layout结束事件进行监听,获取小灰点的距离		llPointGroup.getViewTreeObserver().addOnGlobalLayoutListener(				new OnGlobalLayoutListener() {					// 当layout执行结束后回调此方法					@Override					public void onGlobalLayout() {						System.out.println("layout 结束");						llPointGroup.getViewTreeObserver()								.removeGlobalOnLayoutListener(this);						mPointWidth = llPointGroup.getChildAt(1).getLeft()								- llPointGroup.getChildAt(0).getLeft();						System.out.println("圆点距离:" + mPointWidth);					}				});	}	/**	 * ViewPager数据适配器	 * 	 * @author Kevin	 * 	 */	class GuideAdapter extends PagerAdapter {		@Override		public int getCount() {			return mImageIds.length;		}		@Override		public boolean isViewFromObject(View arg0, Object arg1) {			return arg0 == arg1;		}		@Override		public Object instantiateItem(ViewGroup container, int position) {			container.addView(mImageViewList.get(position));			return mImageViewList.get(position);		}		@Override		public void destroyItem(ViewGroup container, int position, Object object) {			container.removeView((View) object);		}	}	/**	 * viewpager的滑动监听	 * 	 * @author Kevin	 * 	 */	class GuidePageListener implements OnPageChangeListener {		// 滑动事件		@Override		public void onPageScrolled(int position, float positionOffset,				int positionOffsetPixels) {			// System.out.println("当前位置:" + position + ";百分比:" + positionOffset			// + ";移动距离:" + positionOffsetPixels);			int len = (int) (mPointWidth * positionOffset) + position					* mPointWidth;			RelativeLayout.LayoutParams params = (RelativeLayout.LayoutParams) viewRedPoint					.getLayoutParams();// 获取当前红点的布局参数			params.leftMargin = len;// 设置左边距			viewRedPoint.setLayoutParams(params);// 重新给小红点设置布局参数		}		// 某个页面被选中		@Override		public void onPageSelected(int position) {			if (position == mImageIds.length - 1) {// 最后一个页面				btnStart.setVisibility(View.VISIBLE);// 显示开始体验的按钮			} else {				btnStart.setVisibility(View.INVISIBLE);			}		}		// 滑动状态发生变化		@Override		public void onPageScrollStateChanged(int state) {		}	}}

public class PrefUtils {	public static final String PREF_NAME = "config";	public static boolean getBoolean(Context ctx, String key,			boolean defaultValue) {		SharedPreferences sp = ctx.getSharedPreferences(PREF_NAME,				Context.MODE_PRIVATE);		return sp.getBoolean(key, defaultValue);	}	public static void setBoolean(Context ctx, String key, boolean value) {		SharedPreferences sp = ctx.getSharedPreferences(PREF_NAME,				Context.MODE_PRIVATE);		sp.edit().putBoolean(key, value).commit();	}}

/** * 闪屏页 */public class SplashActivity extends Activity {	RelativeLayout rlRoot;	@Override	protected void onCreate(Bundle savedInstanceState) {		super.onCreate(savedInstanceState);		setContentView(R.layout.activity_splash);		rlRoot = (RelativeLayout) findViewById(R.id.rl_root);		startAnim();		//LibUtils.doSomething();		//rlRoot.setBackgroundResource(R.drawable.newscenter_press);	}	/**	 * 开启动画	 */	private void startAnim() {		// 动画集合		AnimationSet set = new AnimationSet(false);		// 旋转动画		RotateAnimation rotate = new RotateAnimation(0, 360,				Animation.RELATIVE_TO_SELF, 0.5f, Animation.RELATIVE_TO_SELF,				0.5f);		rotate.setDuration(1000);// 动画时间		rotate.setFillAfter(true);// 保持动画状态		// 缩放动画		ScaleAnimation scale = new ScaleAnimation(0, 1, 0, 1,				Animation.RELATIVE_TO_SELF, 0.5f, Animation.RELATIVE_TO_SELF,				0.5f);		scale.setDuration(1000);// 动画时间		scale.setFillAfter(true);// 保持动画状态		// 渐变动画		AlphaAnimation alpha = new AlphaAnimation(0, 1);		alpha.setDuration(2000);// 动画时间		alpha.setFillAfter(true);// 保持动画状态		set.addAnimation(rotate);		set.addAnimation(scale);		set.addAnimation(alpha);		// 设置动画监听		set.setAnimationListener(new AnimationListener() {			@Override			public void onAnimationStart(Animation animation) {			}			@Override			public void onAnimationRepeat(Animation animation) {			}			// 动画执行结束			@Override			public void onAnimationEnd(Animation animation) {				jumpNextPage();			}		});		rlRoot.startAnimation(set);	}	/**	 * 跳转下一个页面	 */	private void jumpNextPage() {		// 判断之前有没有显示过新手引导		boolean userGuide = PrefUtils.getBoolean(this, "is_user_guide_showed",				false);		if (!userGuide) {			// 跳转到新手引导页			startActivity(new Intent(SplashActivity.this, GuideActivity.class));		} else {			startActivity(new Intent(SplashActivity.this, MainActivity.class));		}		finish();	}}