App啟動頁倒計時功能，app啟動倒計時

App啟動頁倒計時功能，app啟動倒計時

轉載請註明出處：http://www.cnblogs.com/cnwutianhao/p/6753418.html 

 

範例程式碼採用 RxJava + RxLifecycle + Data-Binding 模式編寫

樣本圖：

話不多說，實現方式如下：

1.匯入依賴庫

① RxJava: Reactive Extensions for the JVM

compile 'io.reactivex:rxjava:1.2.9'compile 'io.reactivex:rxandroid:1.2.1'

② RxLifecycle

compile 'com.trello:rxlifecycle:1.0'compile 'com.trello:rxlifecycle-components:1.0'

③ Data-Binding

dataBinding {    enabled = true}

 

2.代碼編寫(關鍵代碼)

① 自訂介面View

public interface BaseView {    <T> LifecycleTransformer<T> bindToLife();}

 

② 建立一個Helper類，用來進行倒計時操作

public final class RxHelper {    private RxHelper() {        throw new AssertionError();    }    /**     * 倒計時     */    public static Observable<Integer> countdown(int time) {        if (time < 0) {            time = 0;        }        final int countTime = time;        return Observable.interval(0, 1, TimeUnit.SECONDS)                .map(new Func1<Long, Integer>() {                    @Override                    public Integer call(Long increaseTime) {                        return countTime - increaseTime.intValue();                    }                })                .take(countTime + 1)                .subscribeOn(Schedulers.io())                .unsubscribeOn(Schedulers.io())                .subscribeOn(AndroidSchedulers.mainThread())                .observeOn(AndroidSchedulers.mainThread());    }}

 

③ 自訂方法：實現非同步載入

private void init() {    RxHelper.countdown(5)            .compose(this.<Integer>bindToLife())            .subscribe(new Subscriber<Integer>() {                @Override                public void onCompleted() {                    doSkip();                }                @Override                public void onError(Throwable e) {                    doSkip();                }                @Override                public void onNext(Integer integer) {                    mBinding.sbSkip.setText("跳過 " + integer);                }            });}

 

④ 自訂方法：實現跳轉

private void doSkip() {    if (!mIsSkip) {        mIsSkip = true;        finish();        startActivity(new Intent(SplashActivity.this, MainActivity.class));        overridePendingTransition(R.anim.hold, R.anim.zoom_in_exit);    }}

 

⑤ 設定主題樣式為全屏

<style name="SplashTheme" parent="Theme.AppCompat.Light.NoActionBar">    <item name="colorPrimary">@color/colorPrimary</item>    <item name="colorPrimaryDark">@color/colorPrimaryDark</item>    <item name="colorAccent">@color/colorAccent</item>    <item name="android:windowFullscreen">true</item></style>

 

樣本Demo下載：App啟動頁倒計時功能

 

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