在启动画面期间加载 MainActivity

Question

我目前有一个 splashScreenActivity，它要求用户按 button 转到 MainActivity。

是否可以在 MainActivity 的 UI 出现在 splashScreenActivity 的 [ 顶部的情况下加载 MainActivity 的所有内容？ =25=] 这样当他按下按钮时，他会被重定向到 MainActivity 并且所有数据都已 100% 加载？

提前致谢

Answer 1

enter code here1) 当用户在 SplashScreenActivity 中时，使用 AsyncTask<> 在后台加载所有 MainActivity 内容。这将帮助您避免单击按钮将您从 SplashScreenActivity 带到 MainActivity 的额外步骤，这将通过使用 Intents 来处理。（参考下面的工作示例）

SplashScreenActivity.java

        package foo.foo.load.mainactivity
        
        import android.app.Activity;
        import android.content.Context;
        import android.content.Intent;
        import android.content.pm.ActivityInfo;
        import android.content.res.AssetManager;
        import android.content.res.Configuration;
        import android.os.AsyncTask;
        import android.os.Bundle;
        import android.util.Log;
        import java.util.ArrayList;
        import java.util.List;
        
        public class SplashScreenActivity extends Activity {
            @Override
            protected void onCreate(Bundle savedInstanceState) {
                super.onCreate(savedInstanceState);
                setContentView(R.layout.activity_splash);      
        
                // Make call to execute AsycTasks<> here
                // This helps avoid the extra step of clicking on a button
                // to take you to the MainActivity
                new StartMainActivity().execute(this);
        
                Thread timerThread = new Thread() {
                    public void run() {
                        try {
                            sleep(2000);
                        } catch(InterruptedException e) {
                            e.printStackTrace();
                        } finally {
                            // After 2 seconds the Splashscreen will disappear and user is taken to MainActivity
                            Intent splashScreenIntent = new Intent(SplashScreenActivity.this, MainActivity.class);
                            startActivity(splashScreenIntent);
                        }
                    }
                };
        
                timerThread.start();
            }
        
            @Override
            protected void onPause() {
                super.onPause();
                finish();
            }
        
            private class StartMainActivity extends AsyncTask<Context, Void, Intent> {
        
                Context ctx;
        
                @Override
                protected Intent doInBackground(Context... params) {
                    ctx = params[0];
                    AssetManager assetManager = ctx.getAssets();
                    final CBLite cblite = new CBLite(new AndroidContext(ctx), assetManager);
                    
                    // Handle all your MainActivity Contents call here 
                    // Begin MainActivity Content Calls            
                    Image.getImages();
                    Navigation.getMainNavigation();
                    // End MainActivity Content Calls
            
                    Intent in = new Intent();
                    in.setClass(ctx, MainActivity.class);
        
                    return in;
                }
        
                @Override
                protected void onPostExecute(Intent intent) {
                    ctx.startActivity(intent);
                    super.onPostExecute(intent);
                }
        
            }
        }

activity_splash.xml

    <?xml version="1.0" encoding="utf-8"?>
    <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
        android:orientation="vertical"
        android:background="@drawable/splashscreen_background_image"
        android:layout_width="match_parent"
        android:layout_height="match_parent">
    
        <TextView
            android:id="@+id/splashScreenMainTitle"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_marginTop="150dp"
            android:gravity="center"
            android:text="Header Title"
            android:visibility="visible"/>
    
        <TextView
            android:id="@+id/splashScreenSubTitle"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_below="@+id/splashScreenMainTitle"
            android:layout_marginBottom="40dp"
            android:gravity="center"
            android:text="Sub Header Title"
            android:visibility="visible"/>
    
        <ImageView
            android:id="@+id/splashScreenLogo"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_below="@+id/splashScreenSubTitle"
            android:src="@drawable/logo"
            android:layout_gravity="center_horizontal"
            android:background="@android:color/transparent"/>
    
    </RelativeLayout>

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<android.support.design.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity">

    <android.support.design.widget.AppBarLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:theme="@style/AppTheme.AppBarOverlay">

        <android.support.v7.widget.Toolbar
            android:id="@+id/toolbar"
            android:layout_width="match_parent"
            android:layout_height="?attr/actionBarSize"
            android:background="?attr/colorPrimary"
            app:popupTheme="@style/AppTheme.PopupOverlay" />

    </android.support.design.widget.AppBarLayout>

    <include layout="@layout/content_main" />

    <android.support.design.widget.FloatingActionButton
        android:id="@+id/fab"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="bottom|end"
        android:layout_margin="@dimen/fab_margin"
        app:srcCompat="@android:drawable/ic_menu_search" />    
   </android.support.design.widget.CoordinatorLayout>

Answer 2

我找到了问题的答案！

请注意，在我的例子中 MainActivity 可以是任何 activity

将启动画面设为 fragment 而不是 activity 允许您将 MainActivity 与 fragment 叠加，而 MainActivity 数据在后台加载。

此时，只要您准备就绪，只需将 fragment 的可见性设置为 View.GONE 或将其从片段堆栈中弹出 getFragmentManager().popBackStack();，您将 return（从未真正离开）到您的 MainActivity 并加载所有数据。

Answer 3

在 Main 上使用带有 Runnable 的全屏对话框 Activity

public void showsplash() {

        final Dialog dialog = new Dialog(MainActivity.this, android.R.style.Theme_Black_NoTitleBar_Fullscreen);
        dialog.requestWindowFeature(Window.FEATURE_NO_TITLE);
        dialog.setContentView(R.layout.activity_splash_screen);
        dialog.setCancelable(true);
        dialog.show();

        final Handler handler  = new Handler();
        final Runnable runnable = new Runnable() {
            @Override
            public void run() {
                {
                    dialog.dismiss();
                }
            }
        };
        handler.postDelayed(runnable, 30000);
    }

在启动画面期间加载 MainActivity

Load MainActivity during Splash Screen

android

splash-screen

SplashScreenActivity.java

activity_splash.xml

activity_main.xml