如何在android中添加libgdx作为子视图

Question

我有main.xml如下:

  <RelativeLayout>
     ...
     <FrameLayout
                    android:id="@+id/panel_sheet"
                    android:layout_width="match_parent"
                    android:layout_height="match_parent">

        <com.libgdx.Sheet3DViewGdx 
                android:id="@+id/m3D"
                android:layout_width="1000dp"
                android:layout_height="600dp"
        />

    </FrameLayout>

...
</RelativeLayout>

我的主要活动类如下:

public class Test extends Activity {

    MainActivity  m3DActivity;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        // TODO Auto-generated method stub
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
    }
}

我的GDX类如下所示,它扩展了ApplicationListener类而不是View.

public class Sheet3DViewGdx implements ApplicationListener{

    @Override
    public void create() {
        InputStream in = Gdx.files.internal("data/obj/Human3DModel.obj").read();
        model =  ObjLoader.loadObj(in);
    }

    @Override
    public void dispose() {
    }

    @Override
    public void pause() {
    }


    @Override
    public void render() {
        Gdx.gl.glClearColor(0.0f, 0.0f, 0.0f, 1.0f);
        Gdx.gl.glClear(GL10.GL_COLOR_BUFFER_BIT | GL10.GL_DEPTH_BUFFER_BIT);
        model.render(GL10.GL_TRIANGLES);
    }

    @Override
    public void resize(int arg0, int arg1) {
        float aspectRatio = (float) arg0 / (float) arg1;
    }

    @Override
    public void resume() {
    }
}

现在,我应该如何在主布局中将Sheet3DViewGdx添加为子视图？

Answer 1

AndroidApplication类(扩展活动)有一个名为的方法initializeForView(ApplicationListener, AndroidApplicationConfiguration),它将返回一个View可以添加到布局中的方法.

因此,您的Test类可以扩展AndroidApplication而不是Activity,以便您可以调用该方法并将View添加到您的布局中.

如果这不是一个选项,出于某种原因,看看AndroidApplication源代码的作用,并模仿它.

Answer 2

我在github上创建了一个Hello World程序,用于在使用Android Studio 2.1的片段中运行libgdx.它遵循官方libgdx wiki上的说明.

AndroidLauncher类:

import android.os.Bundle;
import android.support.v4.app.FragmentActivity;
import com.badlogic.gdx.backends.android.AndroidFragmentApplication;

public class AndroidLauncher extends FragmentActivity implements  AndroidFragmentApplication.Callbacks {
    @Override
    public void onCreate (Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        setContentView(R.layout.layout);

        // Create libgdx fragment
        GameFragment libgdxFragment = new GameFragment();

        // Put it inside the framelayout (which is defined in the layout.xml file).
        getSupportFragmentManager().beginTransaction().
                add(R.id.content_framelayout, libgdxFragment).
                commit();
    }

    @Override
    public void exit() {

    }


}

GameFragment类:

import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;

import com.badlogic.gdx.backends.android.AndroidFragmentApplication;

public class GameFragment extends AndroidFragmentApplication{

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState)
    {
        // return the GLSurfaceView on which libgdx is drawing game stuff
        return initializeForView(new MyGdxGame());
    }
}

layout.xml:

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

    <FrameLayout
    android:id="@+id/content_framelayout"
    android:layout_width="match_parent"
    android:layout_height="0dp"
    android:layout_weight="2">
    </FrameLayout>

    <TextView
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:layout_weight="1"
        android:background="#FF0000"
        android:textColor="#00FF00"
        android:textSize="40dp"
        android:text="I'm just a TextView here with red background :("/>

</LinearLayout>

MyGdxGame类:

import com.badlogic.gdx.ApplicationAdapter;
import com.badlogic.gdx.Gdx;
import com.badlogic.gdx.graphics.Color;
import com.badlogic.gdx.graphics.GL20;
import com.badlogic.gdx.graphics.Texture;
import com.badlogic.gdx.graphics.g2d.BitmapFont;
import com.badlogic.gdx.graphics.g2d.SpriteBatch;

public class MyGdxGame extends ApplicationAdapter {
    SpriteBatch batch;
    Texture img;
    private BitmapFont font;


    @Override
    public void create () {
        batch = new SpriteBatch();
        img = new Texture("badlogic.jpg");
        font = new BitmapFont();
        font.setColor(Color.BLUE);
    }

    @Override
    public void render () {
        Gdx.gl.glClearColor(0, 0, 0, 0);
        Gdx.gl.glClear(GL20.GL_COLOR_BUFFER_BIT);

        batch.begin();

        //batch.draw(img, 0, 0);
        font.getData().setScale(6.0f);
        font.draw(batch, "Hello World from libgdx running in a fragment! :)", 100, 300);

        batch.end();
    }

    @Override
    public void dispose () {
        batch.dispose();
        img.dispose();
    }
}

确保您已添加以下内容:

compile "com.android.support:support-v4:24.1.1"

在项目(":android")部分的"dependencies {.}"部分中的项目gradle脚本.

Answer 3

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);
    AndroidApplicationConfiguration cfg = new AndroidApplicationConfiguration();
    cfg.useGL20 = false;
    //initialize(new LoveHearts(), cfg);
    LinearLayout lg=(LinearLayout)findViewById(R.id.game);
    lg.addView(initializeForView(new LoveHearts(), cfg));
}

Answer 4

现在使用libgdx项目作为Android应用程序内部的视图,在libgdx wiki中清楚地记录示例代码,实现为Fragment(现代Android应用程序的最佳实践):

1. 如果尚未添加Android V4支持库,请将其添加到-android项目及其构建路径中.这是为了以后扩展FragmentActivity所必需的
2. 更改AndroidLauncher活动以扩展FragmentActivity,而不是AndroidApplication
3. 在AndroidLauncher活动上实现AndroidFragmentApplication.Callbacks
4. 创建一个扩展AndroidFragmentApplication的类,它是Libgdx的Fragment实现.
5. 在Fragment的onCreateView方法中添加initializeForView()代码.
6. 最后,使用Libgdx Fragment替换AndroidLauncher活动内容.