android欢迎页广告

最近做了一个欢迎页的广告功能，分析一下需求，主要就是在程序启动是，需要展示一个广告暂定时间为三秒。

分析一下遇到的问题，首先广告图片是从服务器获取的，在请求服务器成功之后，才能出现这个广告页。处理广告的逻辑写在连接网络之后会出现一个等该时间，这个时间屏幕是白色的。其次，就是这个imageLoader处理图片会有一个不同步的情况，这个比较麻烦，第三个就是倒计时的问题了。

首先，第一个问题，解决是用到缓存，用sp，先保存拿到的服务器传过来的信息。因为程序第一次安装启动是不需要广告页，是四张图片的viewpager，这个时候正好村下载，下次启动再使用。

请求成功之后保存

HttpInterfaceListener getSplashAdListener = new HttpInterfaceListener() {
@Override
    public void onResult(BeanParent bean) {
// TODO Auto-generated method stub
        SplashAd splashAd = (SplashAd) bean;
        int err_code = 0;
        if (splashAd.isErr()) {
            err_code = splashAd.getErr_code();
            if (err_code == BeanParent.CODE_TIMEOUT || err_code == AppConfig.CODE_TIMEOUT_ONSER) {
                ToastUtil.showToast(getApplicationContext(), BeanParent.MSG_TIMEOUT, Toast.LENGTH_SHORT);
            }
        } else {
mBid = splashAd.getBid();
            mImageUrl = splashAd.getUrl();
            mPic = splashAd.getPic();
            mTime = splashAd.getTime();

            SharedPreferences settings = getSharedPreferences("config", Activity.MODE_PRIVATE);
            SharedPreferences.Editor editor = settings.edit();
            editor.putString("newBid", mBid);
            editor.putString("newImageUrl", mImageUrl);
            editor.putString("newPic", mPic);
            editor.putString("newTime", mTime);
            editor.commit();

        }
    }
};

在程序入口判断网络，并请求网络

//版本号检测
if (GeneralUtil.getLatestEnter(this).equals(
        AppConstant.getVersion(this))) {

//获取本地广告页面信息
    SharedPreferences sp = getSharedPreferences("config", Activity.MODE_PRIVATE);
    saveBid = sp.getString("newBid", "");
    saveImageUrl = sp.getString("newImageUrl", "");
    savePic = sp.getString("newPic", "");
    saveTime = sp.getString("newTime", "3");
    //如果有网络、本地广告信息不为空则显示广告页面
    if (Xs8_Application.isHaveInternet()) {
        update();
        new HttpInterfaceTask(this, getSplashAdListener).execute(HttpInterface.TASK_SPLASH_GET_AD);
    } else {
//启动跳转至书架
        setContentView(R.layout.xs8_news_splash);
        new Handler().postDelayed(new Runnable() {
@Override
            public void run() {
                Intent intent = new Intent(
                        Xs8_News_SplashActivity.this,
                        Xs8_News_Bookself.class);
                if (mAlipay.isOk()) {
                    GlobalValues.ISALIPAY = true;
                    mAlipay.writeToIntent(intent);
                }
                intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
                startActivity(intent);
                Xs8_News_SplashActivity.this.finish();
                ActivityAnimation
                        .defaultAnimation(Xs8_News_SplashActivity.this);
            }
        }, 1200);
    }
} else {
if (Xs8_Application.isHaveInternet())
new HttpInterfaceTask(this, getSplashAdListener).execute(HttpInterface.TASK_SPLASH_GET_AD);
    initFirstEnterView();
}

有网络走update（）方法，开始时间循环，并处理广告操作，广告可以点击也可以跳过。

public void update() {
if (!TextUtils.isEmpty(saveTime) && TextUtils.isDigitsOnly(saveTime)) {
int i = Integer.valueOf(saveTime).intValue();
        recLen = i + 1;
    }

    setContentView(R.layout.xs8_news_splash);
    mWelImage = (ImageView) findViewById(R.id.activity_main);
    mDefaultImage = (ImageView) findViewById(R.id.activity_main_image);
    mTimeCount = (TextView) findViewById(R.id.time_text);
    mButton = (Button) findViewById(R.id.skip);

    mButton.setOnClickListener(new View.OnClickListener() {
@Override
        public void onClick(View v) {
            gotoBookShelf();
        }
    });

    if (!TextUtils.isEmpty(savePic)) {
mWelImage.setVisibility(View.VISIBLE);
        mDefaultImage.setVisibility(View.GONE);
        ImageLoader.getInstance().displayImage(savePic, mWelImage,
                GlobalValues.welspash);

        mTimeCount.setVisibility(View.VISIBLE);
        mButton.setVisibility(View.VISIBLE);
        mWelImage.setOnClickListener(new View.OnClickListener() {
@Override
            public void onClick(View v) {
if (!TextUtils.isEmpty(saveBid)) {
                    Intent intent = new Intent(Xs8_News_SplashActivity.this,
                            Xs8_News_Corver.class);
                    intent.putExtra(Xs8_News_BaseActivity.INTTENT_BID,
                            saveBid);
                    intent.putExtra(Xs8_News_BaseActivity.INTENT, SplashTag);
                    startActivity(intent);
                    if(timer!=null)
timer.cancel();
                    ActivityAnimation
                            .animation_2in(Xs8_News_SplashActivity.this);
                    Xs8_News_SplashActivity.this.finish();
                } else if (TextUtils.isEmpty(saveBid)&& !TextUtils.isEmpty(saveImageUrl)) {
                    Intent intent1 = new Intent(Xs8_News_SplashActivity.this,
                            Xs8_News_Bookself.class);
                    startActivity(intent1);
                    Uri uri = Uri.parse(saveImageUrl);
                    Intent intent = new Intent(Intent.ACTION_VIEW, uri);
                    startActivity(intent);
                    if(timer!=null)
timer.cancel();
                    ActivityAnimation
                            .animation_2in(Xs8_News_SplashActivity.this);
                    Xs8_News_SplashActivity.this.finish();
                } else if (TextUtils.isEmpty(mBid)&& TextUtils.isEmpty(saveImageUrl)) {
                    gotoBookShelf();
                }
            }
        });
        mDefaultImage.setVisibility(View.GONE);
        timer.schedule(task, 0, 1000);
    } else {
        setContentView(R.layout.xs8_news_splash);
        mDefaultImage.setVisibility(View.VISIBLE);
        mWelImage.setVisibility(View.GONE);
        gotoBookShelf();

    }

最后就是时间Timer倒计时了，还有倒计时开始的时候跳转后记得timer.cancel.结束倒计时

TimerTask task = new TimerTask() {
@Override
    public void run() {
        runOnUiThread(new Runnable() {      // UI thread
            @Override
            public void run() {
recLen--;
                if (recLen > 0) {
mTimeCount.setText("" + recLen);
                }else{
if (timer!=null)
timer.cancel();
                    Intent intent = new Intent();
                    intent.setClass(Xs8_News_SplashActivity.this,
                            Xs8_News_Bookself.class);
                    if (mAlipay.isOk()) {
                        GlobalValues.ISALIPAY = true;
                        mAlipay.writeToIntent(intent);
                    }
                    intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
                    startActivity(intent);
                    Xs8_News_SplashActivity.this.finish();
                    ActivityAnimation
                            .defaultAnimation(Xs8_News_SplashActivity.this);
                }
            }
        });
    }
};