Android閃屏Activity實現秒開

<!--SplashActivity Theme-->
<style name="SplashTheme" parent="AppTheme">
    <!-- 歡迎頁背景-->
    <item name="android:windowBackground">@drawable/bg_splash</item>
    <item name="android:windowFullscreen">true</item>
    <!-- <item name="android:windowIsTranslucent">true</item> --> <!-- 透明背景不要了 -->
</style>

<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
    <!-- 背景顏色 -->
    <item android:drawable="@color/color_ToolbarLeftItem" />

    <item>
        <!-- 圖片 -->
        <bitmap
            android:antialias="true"
            android:gravity="center"
            android:src="@drawable/ic_splash" />
    </item>
</layer-list>

SplashActivity 不要設置setContentView(R.layout.activity_main);

數據加載放在繼承的Application里面，新開線程，在SplashActivity 里面調用即可，如下：

ackage com.johnson.kuyqi.mvp.view.activities;

import android.content.Intent;
import android.os.Bundle;
import android.os.Handler;
import android.support.annotation.Nullable;
import android.util.Log;

import com.johnson.kuyqi.app.base.BaseActivity;
import com.johnson.kuyqi.app.kuyqiapp.KuyqiApp;

/**
 * Created by HelloWord on 2016/12/12.
 */

public class SplashActivity extends BaseActivity {

    private static final int SPLASH_SHOW_TIME = 2000;// SplashActivity最小顯示時間
    private long mStartTime;// 開始時間


    @Override
    protected void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        mStartTime = System.currentTimeMillis();//記錄開始時間，
        Log.i("tag", "mStartTime=" + mStartTime);
        KuyqiApp.getInstance().initData(mHandler);//開始加載數據
    }

    @Override
    protected void initFoundView() {

    }

    @Override
    protected void initView() {

    }

    @Override
    protected void initEvent() {

    }

    private Handler mHandler = new Handler() {
        public void handleMessage(android.os.Message msg) {
            switch (msg.what) {
                case KuyqiApp.INIT_DATA_SCUESS:// 如果城市列表加載完畢，就發送此消息
                    long loadingTime = System.currentTimeMillis() - mStartTime;// 計算一下總共花費的時間
                    if (loadingTime < SPLASH_SHOW_TIME) {// 如果比最小顯示時間還短，就延時進入MainActivity，否則直接進入
                        mHandler.postDelayed(goToMainActivity, SPLASH_SHOW_TIME - loadingTime);
                    } else {
                        mHandler.post(goToMainActivity);
                    }
                    break;
                default:
                    break;
            }
        }
    };

    /**
     * 進入下一個Activity
     */
    Runnable goToMainActivity = new Runnable() {

        @Override
        public void run() {
            SplashActivity.this.startActivity(new Intent(SplashActivity.this, MainActivity.class));
            finish();
        }
    };


}

public static void initData(final Handler mHandler) {

    new Thread() {
        @Override
        public void run() {
            super.run();
            mHandler.sendEmptyMessage(INIT_DATA_SCUESS);

        }
    }.start();
}