WelcomeActivity.java

package com.andbase.demo.activity;

import android.graphics.drawable.Drawable;
import android.os.Bundle;
import android.view.View;
import android.view.animation.Animation;
import android.view.animation.Animation.AnimationListener;
import android.view.animation.AnimationUtils;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.TextView;

import com.ab.activity.AbActivity;
import com.ab.view.titlebar.AbTitleBar;
import com.andbase.R;
import com.andbase.global.MyApplication;

public class WelcomeActivity extends AbActivity {
	
	private MyApplication application;
	private ImageView mShowPicture;
	private TextView mShowText;
	private Button mRegister;
	private Button mWhoIKnow;
	private Button mLogin;
	/**
	 * 三个切换的动画
	 */
	private Animation mFadeIn;
	private Animation mFadeInScale;
	private Animation mFadeOut;
	/**
	 * 三个图片
	 */
	private Drawable mPicture_1;
	private Drawable mPicture_2;
	private Drawable mPicture_3;
	
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setAbContentView(R.layout.welcome);
        
        AbTitleBar mAbTitleBar = this.getTitleBar();
        mAbTitleBar.setTitleText(R.string.welcome_name);
        mAbTitleBar.setLogo(R.drawable.button_selector_back);
        mAbTitleBar.setTitleBarBackground(R.drawable.top_bg);
        mAbTitleBar.setTitleTextMargin(10, 0, 0, 0);
        mAbTitleBar.setLogoLine(R.drawable.line);
        
        mAbTitleBar.setVisibility(View.GONE);
        
        application = (MyApplication)abApplication;
        mShowPicture = (ImageView) findViewById(R.id.guide_picture);
		mShowText = (TextView) findViewById(R.id.guide_content);
		init();
		setListener();
    }
    
    /**
	 * 监听事件
	 */
	private void setListener() {
		/**
		 * 动画切换原理:开始时是用第一个渐现动画,当第一个动画结束时开始第二个放大动画,当第二个动画结束时调用第三个渐隐动画,
		 * 第三个动画结束时修改显示的内容并且重新调用第一个动画,从而达到循环效果
		 */
		mFadeIn.setAnimationListener(new AnimationListener() {

			public void onAnimationStart(Animation animation) {

			}

			public void onAnimationRepeat(Animation animation) {

			}

			public void onAnimationEnd(Animation animation) {
				mShowPicture.startAnimation(mFadeInScale);
			}
		});
		mFadeInScale.setAnimationListener(new AnimationListener() {

			public void onAnimationStart(Animation animation) {

			}

			public void onAnimationRepeat(Animation animation) {

			}

			public void onAnimationEnd(Animation animation) {
				mShowPicture.startAnimation(mFadeOut);
			}
		});
		mFadeOut.setAnimationListener(new AnimationListener() {

			public void onAnimationStart(Animation animation) {

			}

			public void onAnimationRepeat(Animation animation) {

			}

			public void onAnimationEnd(Animation animation) {
				/**
				 * 这里其实有些写的不好,还可以采用更多的方式来判断当前显示的是第几个,从而修改数据,
				 * 我这里只是简单的采用获取当前显示的图片来进行判断。
				 */
				if (mShowPicture.getDrawable().equals(mPicture_1)) {
					mShowText.setText("图片1");
					mShowPicture.setImageDrawable(mPicture_2);
				} else if (mShowPicture.getDrawable().equals(mPicture_2)) {
					mShowText.setText("图片2");
					mShowPicture.setImageDrawable(mPicture_3);
				} else if (mShowPicture.getDrawable().equals(mPicture_3)) {
					mShowText.setText("图片3");
					mShowPicture.setImageDrawable(mPicture_1);
				}
				mShowPicture.startAnimation(mFadeIn);
			}
		});
		
	}

	/**
	 * 初始化
	 */
	private void init() {
		initAnim();
		initPicture();
		/**
		 * 界面刚开始显示的内容
		 */
		mShowPicture.setImageDrawable(mPicture_1);
		mShowText.setText("图片1");
		mShowPicture.startAnimation(mFadeIn);
	}

	/**
	 * 初始化动画
	 */
	private void initAnim() {
		mFadeIn = AnimationUtils.loadAnimation(WelcomeActivity.this,R.anim.welcome_fade_in);
		mFadeIn.setDuration(1000);
		mFadeInScale = AnimationUtils.loadAnimation(WelcomeActivity.this,R.anim.welcome_fade_in_scale);
		mFadeInScale.setDuration(6000);
		mFadeOut = AnimationUtils.loadAnimation(WelcomeActivity.this,R.anim.welcome_fade_out);
		mFadeOut.setDuration(1000);
	}

	/**
	 * 初始化图片
	 */
	private void initPicture() {
		mPicture_1 = getResources().getDrawable(R.drawable.pic1);
		mPicture_2 = getResources().getDrawable(R.drawable.pic2);
		mPicture_3 = getResources().getDrawable(R.drawable.pic3);
	}
    
}