创建一个活动，让我们活动命名为“a”，然后创建一个名为mysscreen .xml的xml文件，在其中设置一个启动画面图像作为背景，然后使用倒计时计时器从一个活动导航到另一个活动。要知道如何使用倒计时定时器看到我的答案在这个问题的TimerTask在Android?

这是完整的代码

SplashActivity.java

public class SplashActivity extends AppCompatActivity {

private final int SPLASH_DISPLAY_DURATION = 1000;

@Override
public void onCreate(Bundle bundle) {
    super.onCreate(bundle);


    new Handler().postDelayed(new Runnable(){
        @Override
        public void run() {

            Intent mainIntent = new Intent(SplashActivity.this,MainActivity.class);
            SplashActivity.this.startActivity(mainIntent);
            SplashActivity.this.finish();
        }
    }, SPLASH_DISPLAY_DURATION);
}}

在drawables中创建bg_splash.xml

<?xml version="1.0" encoding="utf-8"?><layer-list xmlns:android="http://schemas.android.com/apk/res/android">

<item
    android:drawable="@color/app_color"/>

<item>
    <bitmap
        android:gravity="center"
        android:src="@drawable/ic_in_app_logo_big"/>
</item></layer-list>

在styles.xml中创建一个自定义主题

<style name="SplashTheme" parent="Theme.AppCompat.NoActionBar">
    <item name="android:windowBackground">@drawable/bg_splash</item>
</style>

最后在AndroidManifest.xml中指定活动的主题

<activity
        android:name=".activities.SplashActivity"
        android:label="@string/app_name"
        android:screenOrientation="portrait"
        android:theme="@style/SplashTheme">
        <intent-filter>
            <action android:name="android.intent.action.MAIN" />

            <category android:name="android.intent.category.LAUNCHER" />
        </intent-filter>
    </activity>

欢呼。

Create an activity: Splash Create a layout XML file: splash.xml Put UI components in the splash.xml layout so it looks how you want your Splash.java may look like this: public class Splash extends Activity { @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.splash); int secondsDelayed = 1; new Handler().postDelayed(new Runnable() { public void run() { startActivity(new Intent(Splash.this, ActivityB.class)); finish(); } }, secondsDelayed * 1000); } } change ActivityB.class to whichever activity you want to start after the splash screen check your manifest file and it should look like

<活动 android: name = "。屏” android: label = " @string / app_name " > > < /活动 <活动 android: name = "。飞溅” android: label = " @string / title_activity_splash_screen " > <意图过滤器> <action android:name="android.intent.action. main " /> <category android:name="android.intent.category. launcher " /> < /意图过滤器> > < /活动

这里有一个简单的!

~卢诺克斯

MainActivity.java

package com.example.splashscreen;

import androidx.appcompat.app.AppCompatActivity;
import android.os.Bundle;

public class MainActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
    }
}

splashscreen.java

package com.example.splashscreen;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.os.Handler;

public class splashscreen extends Activity {
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.splashscreen);

        //Splash Screen duration
        int secondsDelayed = 1;
        new Handler().postDelayed(new Runnable() {
            public void run() {
                startActivity(new Intent(splashscreen.this, MainActivity.class));
                finish();
            }
        }, secondsDelayed * 3000);
    }
}

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout 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">

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Hello World!"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toRightOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

</androidx.constraintlayout.widget.ConstraintLayout>

splashscreen.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical" android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="@drawable/splashlogo"

    />

splashlogo.png

splashlogo.png

GitHub

SplashScreen

虽然有很好的答案，但我将展示谷歌推荐的方法:

1)首先为启动画面创建一个主题: 你有一个名为splashscreenTheme的主题，你的启动器主题将是:

<style name="splashscreenTheme">
  <item name="android:windowBackground">@drawable/launch_screen</item>
</style>

注意:

android:windowBackground已经设置了你的溅屏图像编号 需要在UI中再次这样做。

你也可以在这里使用颜色来代替绘图。

2)设置主题为splashscreenActivity的manifest

   <activity
            android:name=".activity.splashscreenActivity"
            android:screenOrientation="portrait"
            android:theme="@style/splashscreenTheme">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>

3)确保你的launch_screen drawable不在drawable文件夹如果你的图像不小。

这将导致更快的启动屏幕启动和拯救你从黑屏

这也避免了额外的透支

在Android Marshmallow之后，我想到的另一个有效使用启动画面的方法是在应用的启动画面中请求必要的Android权限。

似乎大多数应用程序都是这样处理权限请求的。

对话框是糟糕的ui，它们破坏了主要流程，让你决定运行时间，事实上，大多数用户甚至可能不在乎你的应用程序是否想在SD卡上写东西。他们中的一些人甚至不明白我们试图传达什么，直到我们用简单的英语翻译出来。 一次请求权限可以减少每次操作前的“if else”次数，使代码看起来不那么杂乱。

这是一个例子，你可以在你的splash活动中请求运行Android OS 23+的设备的权限。

如果所有权限都被授予或已经授予或应用程序正在Pre Marshmallow上运行，那么只需去显示主要内容，几乎半秒的延迟，以便用户可以欣赏我们在阅读这个问题时所付出的努力，并试图给予我们最好的。

import android.Manifest;
import android.annotation.TargetApi;
import android.app.AlertDialog;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.os.Build;
import android.os.Bundle;
import android.os.Handler;
import android.support.v7.app.AppCompatActivity;
import android.widget.Toast;

import com.c2h5oh.beer.R;
import com.c2h5oh.beer.utils.Animatrix;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

public class SplashActivity extends AppCompatActivity {

    final private int REQUEST_CODE_ASK_MULTIPLE_PERMISSIONS = 124;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.splash);

        //show animations 
        Animatrix.scale(findViewById(R.id.title_play), 100);
        Animatrix.scale(findViewById(R.id.title_edit), 100);
        Animatrix.scale(findViewById(R.id.title_record), 100);
        Animatrix.scale(findViewById(R.id.title_share), 100);

        if (Build.VERSION.SDK_INT >= 23) {

            // Marshmallow+ Permission APIs
            fuckMarshMallow();

        } else {

            // Pre-Marshmallow
            ///Display main contents
            displaySplashScreen();
        }
    }

    @Override
    public void onRequestPermissionsResult(int requestCode, String[] permissions, int[] grantResults) {
        switch (requestCode) {
            case REQUEST_CODE_ASK_MULTIPLE_PERMISSIONS: {
                Map<String, Integer> perms = new HashMap<String, Integer>();
                // Initial
                perms.put(Manifest.permission.READ_EXTERNAL_STORAGE, PackageManager.PERMISSION_GRANTED);
                perms.put(Manifest.permission.RECORD_AUDIO, PackageManager.PERMISSION_GRANTED);
                perms.put(Manifest.permission.MODIFY_AUDIO_SETTINGS, PackageManager.PERMISSION_GRANTED);
                perms.put(Manifest.permission.VIBRATE, PackageManager.PERMISSION_GRANTED);
                // Fill with results
                for (int i = 0; i < permissions.length; i++)
                    perms.put(permissions[i], grantResults[i]);

                // Check for ACCESS_FINE_LOCATION
                if (perms.get(Manifest.permission.READ_EXTERNAL_STORAGE) == PackageManager.PERMISSION_GRANTED
                        && perms.get(Manifest.permission.RECORD_AUDIO) == PackageManager.PERMISSION_GRANTED
                        && perms.get(Manifest.permission.MODIFY_AUDIO_SETTINGS) == PackageManager.PERMISSION_GRANTED
                        && perms.get(Manifest.permission.VIBRATE) == PackageManager.PERMISSION_GRANTED) {
                    // All Permissions Granted

                    // Permission Denied
                    Toast.makeText(SplashActivity.this, "All Permission GRANTED !! Thank You :)", Toast.LENGTH_SHORT)
                            .show();

                    displaySplashScreen();

                } else {
                    // Permission Denied
                    Toast.makeText(SplashActivity.this, "One or More Permissions are DENIED Exiting App :(", Toast.LENGTH_SHORT)
                            .show();

                    finish();
                }
            }
            break;
            default:
                super.onRequestPermissionsResult(requestCode, permissions, grantResults);
        }
    }


    @TargetApi(Build.VERSION_CODES.M)
    private void fuckMarshMallow() {
        List<String> permissionsNeeded = new ArrayList<String>();

        final List<String> permissionsList = new ArrayList<String>();
        if (!addPermission(permissionsList, Manifest.permission.READ_EXTERNAL_STORAGE))
            permissionsNeeded.add("Read SD Card");
        if (!addPermission(permissionsList, Manifest.permission.RECORD_AUDIO))
            permissionsNeeded.add("Record Audio");
        if (!addPermission(permissionsList, Manifest.permission.MODIFY_AUDIO_SETTINGS))
            permissionsNeeded.add("Equilizer");
        if (!addPermission(permissionsList, Manifest.permission.VIBRATE))
            permissionsNeeded.add("Vibrate");

        if (permissionsList.size() > 0) {
            if (permissionsNeeded.size() > 0) {

                // Need Rationale
                String message = "App need access to " + permissionsNeeded.get(0);

                for (int i = 1; i < permissionsNeeded.size(); i++)
                    message = message + ", " + permissionsNeeded.get(i);

                showMessageOKCancel(message,
                        new DialogInterface.OnClickListener() {

                            @Override
                            public void onClick(DialogInterface dialog, int which) {
                                requestPermissions(permissionsList.toArray(new String[permissionsList.size()]),
                                        REQUEST_CODE_ASK_MULTIPLE_PERMISSIONS);
                            }
                        });
                return;
            }
            requestPermissions(permissionsList.toArray(new String[permissionsList.size()]),
                    REQUEST_CODE_ASK_MULTIPLE_PERMISSIONS);
            return;
        }

        Toast.makeText(SplashActivity.this, "No new Permission Required- Launching App .You are Awesome!!", Toast.LENGTH_SHORT)
                .show();

        displaySplashScreen();
    }


    private void showMessageOKCancel(String message, DialogInterface.OnClickListener okListener) {
        new AlertDialog.Builder(SplashActivity.this)
                .setMessage(message)
                .setPositiveButton("OK", okListener)
                .setNegativeButton("Cancel", null)
                .create()
                .show();
    }

    @TargetApi(Build.VERSION_CODES.M)
    private boolean addPermission(List<String> permissionsList, String permission) {

        if (checkSelfPermission(permission) != PackageManager.PERMISSION_GRANTED) {
            permissionsList.add(permission);
            // Check for Rationale Option
            if (!shouldShowRequestPermissionRationale(permission))
                return false;
        }
        return true;
    }

    /**
     * Display main content with little delay just so that user can see
     * efforts I put to make this page
     */
    private void displaySplashScreen() {
        new Handler().postDelayed(new Runnable() {

        /*
         * Showing splash screen with a timer. This will be useful when you
         * want to show case your app logo / company
         */

            @Override
            public void run() {
                startActivity(new Intent(SplashActivity.this, AudioPlayerActivity.class));
                finish();
            }
        }, 500);
    }


}