Android(安卓)闪屏页与引导页制作

原创代码禁止转载！

本篇为闪屏页与引导页的实现

知识点：

闪屏页：补间动画的使用，SharedPreferences，定时器的用法

引导页：ViewPager，PagerAdapter，绑定数据源，会移动的小圆点，获取视图树

有问题下面评论，一起探讨；

首先来看下闪屏页的实现：

import android.content.Intent;import android.content.SharedPreferences;import android.support.v7.app.AppCompatActivity;import android.os.Bundle;import android.util.Log;import android.view.animation.AlphaAnimation;import android.view.animation.Animation;import android.view.animation.AnimationSet;import android.view.animation.RotateAnimation;import android.view.animation.ScaleAnimation;import android.widget.RelativeLayout;import java.util.Timer;import java.util.TimerTask;public class SplashActivity extends AppCompatActivity {    RelativeLayout relativeLayout;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.splash_activity);        relativeLayout= (RelativeLayout) findViewById(R.id.relativeLayout);        startAnimation();        Timer timer=new Timer();        TimerTask task =new TimerTask() {            @Override            public void run() {                guide();                finish();            }        };        timer.schedule(task,6000);    }    private void startAnimation(){        AnimationSet animationSet=new AnimationSet(false);        RotateAnimation rotate=new RotateAnimation(0,360,                Animation.RELATIVE_TO_SELF,0.5f,                Animation.RELATIVE_TO_SELF,0.5f);        rotate.setDuration(5000);        rotate.setFillAfter(true);        ScaleAnimation scale=new ScaleAnimation(0,1,0,1,Animation.RELATIVE_TO_SELF,0.5f,                Animation.RELATIVE_TO_SELF,0.5f);        scale.setDuration(5000);        scale.setFillAfter(true);        AlphaAnimation alpha=new AlphaAnimation(0,1);        alpha.setDuration(5000);        alpha.setFillAfter(true);        animationSet.addAnimation(rotate);        animationSet.addAnimation(scale);        animationSet.addAnimation(alpha);        relativeLayout.startAnimation(animationSet);    }    public void guide(){        //是否是第一次登陆        SharedPreferences sharedPreferences = this.getSharedPreferences("share", MODE_PRIVATE);        boolean isFirstRun = sharedPreferences.getBoolean("isFirstRun", true);        SharedPreferences.Editor editor = sharedPreferences.edit();        if (isFirstRun){            Log.e("debug", "第一次运行");            editor.putBoolean("isFirstRun", false);            editor.commit();            Intent intent = new Intent();            intent.setClass(SplashActivity.this,GuideActivity.class);            startActivity(intent);        } else {            Log.e("debug", "不是第一次运行");            Intent intent = new Intent();            intent.setClass(SplashActivity.this,MainActivity.class);            startActivity(intent);        }    }}

引导页代码参考如下：

import android.app.Activity;import android.content.Intent;import android.os.Bundle;import android.support.v4.view.PagerAdapter;import android.support.v4.view.ViewPager;import android.view.View;import android.view.ViewGroup;import android.view.ViewTreeObserver;import android.view.Window;import android.widget.Button;import android.widget.ImageView;import android.widget.LinearLayout;import android.widget.RelativeLayout;import java.util.ArrayList;/** * Created by Administrator on 2017/5/19 0019. */public class GuideActivity extends Activity{    private static final int[] mImageIds={R.drawable.guide_1,R.drawable.guide_2,R.drawable.guide_3};    private ViewPager viewPager;    private  ArrayList mImageViewList;    private View viewRedPoint;    private LinearLayout llPointGroup;//引导圆点控件    private int mPointWidth;//圆点间的距离    private Button start_button;    @Override    protected void onCreate( Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        requestWindowFeature(Window.FEATURE_NO_TITLE);//去掉标题        setContentView(R.layout.guide_activity);        viewPager=(ViewPager)findViewById(R.id.vp_guide);        llPointGroup=(LinearLayout) findViewById(R.id.ll_point_group);        viewRedPoint=(View)findViewById(R.id.view_red_point);        viewPager.setAdapter(new GuideAdapter());        viewPager.setOnPageChangeListener(new GuidePageListener());        start_button = (Button) findViewById(R.id.buttonStart);        start_button.setOnClickListener(new View.OnClickListener() {            @Override            public void onClick(View v) {                Intent intent = new Intent();                intent.setClass(GuideActivity.this, MainActivity.class);                startActivity(intent);                finish();            }        });        initViews();    }    /*     *初始化界面     */    private void initViews(){        mImageViewList = new ArrayList();            //初始化引导页的3个页面        for (int i=0;i0){                params.leftMargin = 10;//设置圆点间隔            }            point.setLayoutParams(params);//设置圆点大小            llPointGroup.addView(point);//将圆点添加到线性布局        }        //获取视图树        llPointGroup.getViewTreeObserver().addOnGlobalLayoutListener(new ViewTreeObserver.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);                //measure(测量大小) layout(界面位置) ondraw                mPointWidth = llPointGroup.getChildAt(1).getLeft()-llPointGroup.getChildAt(0).getLeft();//                System.out.println("圆点距离："+mPointWidth);            }        });    }    /*     *ViewPager的适配器     */    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);        }    }    /*     *设置viewpager的滑动监听     */    class GuidePageListener implements ViewPager.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();//获取当前红点布局参数            Params.leftMargin = len;//设置左边距            viewRedPoint.setLayoutParams(Params);//重新给红点设置布局参数        }        //某个页面被选中        @Override        public void onPageSelected(int position) {            if ( position == mImageIds.length-1) {                start_button.setVisibility(View.VISIBLE);            }else{                start_button.setVisibility(View.INVISIBLE);            }        }        //滑动状态发生变化        @Override        public void onPageScrollStateChanged(int state) {        }    }}

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