Question

我正在写一个小的Android游戏，我想在每个关卡之前和游戏结束后显示一个启动屏幕。我发现的大多数教程仅显示了在运行MainActivity之前运行的启动画面实现。

就我而言，我需要在MainActivity运行时“运行”启动画面。我该如何实现？

我已经创建了一个SplashActivity类，可以根据教程扩展AppCompatActivity，但是我认为这不适合我的问题。

public class SplashActivity extends AppCompatActivity
{
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        new Handler().postDelayed(new Runnable() {
            @Override
            public void run() {
                // This method will be executed once the timer is over
                Intent i = new Intent(SplashActivity.this, MainActivity.class);
                startActivity(i);
                finish();
            }
        }, 5000);
    }
}

该活动具有以下xml：

<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context="com.androidcodefinder.splashscreendemo.MainActivity"
    android:background="@color/backgroundColor">

<ImageView
        android:id="@+id/logo"
        android:src="@mipmap/splash"
        android:layout_width="120dp"
        android:layout_height="2dp"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toRightOf="parent"
        app:layout_constraintTop_toTopOf="parent"/>

</android.support.constraint.ConstraintLayout>

在MainActivity类中，我启动一个GamePanel extends SurfaceView，然后启动GameLoop。

@Override
public void run () {
    Canvas canvas;

    while (!this.exit) {
        canvas = null;

        try {
            canvas = this.surfaceHolder.lockCanvas();

            playAnimation(R.drawable.splash_gameover, R.anim.viewanimation);

            synchronized (this.surfaceHolder) {
                this.gamePanel.update();
                this.gamePanel.render(canvas, lag);
            }
        } finally {
            if (canvas != null) {
                this.surfaceHolder.unlockCanvasAndPost(canvas);
            }
        }
    }
}

Answer 1

您可以打电话

Intent i = new Intent(MainActivity.this, SplashActivity.class);
startActivity(i);

在MainActivity中您想要打开SplashActivity的任何地方。但是，您可能不希望SplashActivity创建另一个新的MainActivtiy。您可以通过Intent传递一些消息，告诉SplashActivtiy该怎么做。

在MainActivity

Intent i = new Intent(MainActivity.this, SplashActivity.class);
i.putExtra("START_NEW_MAIN",false)
startActivity(i);

在SplashActivity

public class SplashActivity extends AppCompatActivity
{
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        final boolean startNewMain = getIntent().getBooleanExtra("START_NEW_MAIN",true)
        new Handler().postDelayed(new Runnable() {
            @Override
            public void run() {
                // This method will be executed once the timer is over
                if(startNewMain)
                {
                    Intent i = new Intent(SplashActivity.this, MainActivity.class);
                    startActivity(i);
                }
                finish();

            }
        }, 5000);
    }
}

如果MainActivity不是您应用的入口点，您甚至可以完全删除SplashActivity中以SplashActivity开头的部分。简单地：

在MainActivity

Intent i = new Intent(MainActivity.this, SplashActivity.class);
startActivity(i);

在SplashActivity

public class SplashActivity extends AppCompatActivity
{
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        new Handler().postDelayed(new Runnable() {
            @Override
            public void run() {
                finish();
            }
        }, 5000);
    }
}

Answer 2

在我的Android游戏 Anagram 中，它工作正常，我使用了以下代码，U可以将其检出-

我创建了一个像这样的xml：

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 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"
android:gravity="center"
android:background="#fff"
tools:context=".SplashScreen">

<ImageView
    android:id="@+id/imgLogo"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:scaleType="fitXY"
    android:background="@drawable/splash" />

</LinearLayout>

@ drawable / splash是U想要显示的背景

下面是SplashScreen代码

public class SplashScreen extends Activity {

private static int SPLASH_TIME_OUT = 3000;

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

    new Handler().postDelayed(new Runnable() {

        @Override
        public void run() {
            Intent intent = new Intent(SplashScreen.this,MainActivity.class);
            startActivity(intent);
            finish();
        }
    }, SPLASH_TIME_OUT);

    }

}

MainActivity运行时如何显示SplashScreen

2 个答案: