如何在 Android 上使用带有 main.xml 的 SurfaceView?

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问题描述

在我项目的主类中，我有

In the main class of my project, I have

public class MyClass extends Activity{
    public void onCreate(Bundle savedInstanceState){
        super.onCreate(savedInstanceState);
        mySurfaceView = new MySurfaceView(this);
        setContentView(mySurfaceView);
        ...
    }

    class MySurfaceView extends SurfaceView implements Runnable{
       ...
    }
}

我想为这个程序添加按钮和滚轮，我现在在一个单独的小程序中使用 main.xml 文件.我知道要访问它，我必须使用 setContentView(R.layout.main) 行，但是，我失去了对 SurfaceView 的访问权限.我如何做到这一点，以便我拥有两者?我在网上看到了一些关于使用 FrameLayout 添加几行的内容，但我不知道在哪里，我尝试将它粘贴在 main.xml 中的不同位置，但它只会导致我的整个程序中断..

I want to add buttons and wheels to this program, which I have in a separate mini-program right now with a main.xml file. I know that to access that, I have to have the line setContentView(R.layout.main), but then, I lose access to my SurfaceView. How do I make it so that I have both? I saw something online about adding a few lines with a FrameLayout but I can't figure out where, and I've tried sticking it in various places in my main.xml but it just causes my entire program to break..

目前我的 main.xml 看起来像这样:

Currently my main.xml looks like this:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
>
 <Button android:id="@+id/selectButton"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:text="Select Time Interval"
android:onClick="selfDestruct"
/>
<Button android:id="@+id/finishButton"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:text="Done"
android:visibility="gone"
android:onClick="selfDestruct"
/>

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_height="wrap_content"
    android:layout_width="wrap_content"
    android:layout_gravity="top|left"
    android:paddingLeft="12dp"
    android:paddingRight="12dp"
    >
    <kankan.wheel.widget.WheelView android:id="@+id/startHour"
        android:visibility="gone"
        android:layout_height="wrap_content"
        android:layout_width="43dp"/>
    <kankan.wheel.widget.WheelView android:id="@+id/startMins"
        android:visibility="gone"
        android:layout_height="wrap_content"
        android:layout_width="wrap_content"/>
        <kankan.wheel.widget.WheelView android:id="@+id/startAmpm"
        android:visibility="gone"
        android:layout_height="wrap_content"
        android:layout_width="wrap_content"/>

        <LinearLayout
            android:orientation="vertical"
            android:layout_width="wrap_content"
            android:layout_height="fill_parent" >
        <TextView android:id="@+id/theWordTo"
            android:visibility="gone"
            android:layout_width="wrap_content"
            android:layout_height="fill_parent"
            android:gravity="center"
            android:text="   to   "/>
        </LinearLayout>

        <kankan.wheel.widget.WheelView android:id="@+id/endHour"
        android:visibility="gone"
        android:layout_height="wrap_content"
        android:layout_width="43dp"
        />
    <kankan.wheel.widget.WheelView android:id="@+id/endMins"
        android:visibility="gone"
        android:layout_height="wrap_content"
        android:layout_width="wrap_content"/>
        <kankan.wheel.widget.WheelView android:id="@+id/endAmpm"
        android:visibility="gone"
        android:layout_height="wrap_content"
        android:layout_width="wrap_content"/>
</LinearLayout>

</LinearLayout>

推荐答案

我想你想使用 FrameLayout.将您的 main.xml 更改为如下所示:

I think you want to use FrameLayout. Change your main.xml to look like this:

<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
>
<kankan.current.app.MyClass.MySurfaceView
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:id="@+id/surfaceView" />

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
>
 <Button android:id="@+id/selectButton"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:text="Select Time Interval"
android:onClick="selfDestruct"
/>
<Button android:id="@+id/finishButton"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:text="Done"
android:visibility="gone"
android:onClick="selfDestruct"
/>

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_height="wrap_content"
    android:layout_width="wrap_content"
    android:layout_gravity="top|left"
    android:paddingLeft="12dp"
    android:paddingRight="12dp"
    >
    <kankan.wheel.widget.WheelView android:id="@+id/startHour"
        android:visibility="gone"
        android:layout_height="wrap_content"
        android:layout_width="43dp"/>
    <kankan.wheel.widget.WheelView android:id="@+id/startMins"
        android:visibility="gone"
        android:layout_height="wrap_content"
        android:layout_width="wrap_content"/>
        <kankan.wheel.widget.WheelView android:id="@+id/startAmpm"
        android:visibility="gone"
        android:layout_height="wrap_content"
        android:layout_width="wrap_content"/>

        <LinearLayout
            android:orientation="vertical"
            android:layout_width="wrap_content"
            android:layout_height="fill_parent" >
        <TextView android:id="@+id/theWordTo"
            android:visibility="gone"
            android:layout_width="wrap_content"
            android:layout_height="fill_parent"
            android:gravity="center"
            android:text="   to   "/>
        </LinearLayout>

        <kankan.wheel.widget.WheelView android:id="@+id/endHour"
        android:visibility="gone"
        android:layout_height="wrap_content"
        android:layout_width="43dp"
        />
    <kankan.wheel.widget.WheelView android:id="@+id/endMins"
        android:visibility="gone"
        android:layout_height="wrap_content"
        android:layout_width="wrap_content"/>
        <kankan.wheel.widget.WheelView android:id="@+id/endAmpm"
        android:visibility="gone"
        android:layout_height="wrap_content"
        android:layout_width="wrap_content"/>
</LinearLayout>

</LinearLayout>

</FrameLayout>

然后在活动中:

public class MyClass extends Activity{
    public void onCreate(Bundle savedInstanceState){
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        mySurfaceView = (MySurfaceView) findViewById(R.id.surfaceView);
    }

    class MySurfaceView extends SurfaceView implements Runnable{
       ...
    }
}

这篇关于如何在 Android 上使用带有 main.xml 的 SurfaceView?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！