Android Open Source - opengl-particles Main Activity

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License

The source code is released under:

Apache License

Java Source Code

/*******************************************************************************
 * Copyright 2014 Kenneth Maffei/*from  www. ja va  2 s .c  o  m*/
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *******************************************************************************/

package com.kennethmaffei.particles;

import java.io.InputStream;

import android.opengl.GLSurfaceView;
import android.os.Bundle;
import android.app.Activity;
import android.content.pm.ActivityInfo;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.RectF;
import android.util.DisplayMetrics;
import android.view.Gravity;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.view.Window;
import android.view.WindowManager;
import android.widget.EditText;
import android.widget.ImageView;
import android.widget.RelativeLayout;

/**
 * Our main activity.
 * 
 * @author Kenneth Maffei
 *
 */
public class MainActivity extends Activity {

  private GLSurfaceView glSurfaceView;
  private GLRenderer glRenderer;
  private float heightScale;
  
  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    
    Globals.context = this;
    
    //Requesting to turn the title OFF 
    requestWindowFeature(Window.FEATURE_NO_TITLE); 
    
    //Making it full screen 
    getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, 
    WindowManager.LayoutParams.FLAG_FULLSCREEN); 
    setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
    
    WindowManager wm = getWindowManager();
    DisplayMetrics dm = new DisplayMetrics();
    wm.getDefaultDisplay().getMetrics(dm);
    
    Globals.deviceWidth = dm.widthPixels;
    Globals.deviceHeight = dm.heightPixels;
    
    glSurfaceView = new GLSurfaceView(this);
    glRenderer = new GLRenderer();
    glSurfaceView.setRenderer(glRenderer); 
    setContentView(glSurfaceView);
    
    ImageView steamButton = new ImageView(this);
    RelativeLayout rl1 = new RelativeLayout(this);
    rl1.addView(steamButton);
    rl1.setGravity(Gravity.CENTER_HORIZONTAL | Gravity.CENTER_VERTICAL);
    
    ImageView fireButton = new ImageView(this);
    RelativeLayout rl2 = new RelativeLayout(this);
    rl2.addView(fireButton);
    rl2.setGravity(Gravity.CENTER_HORIZONTAL | Gravity.CENTER_VERTICAL);
    
    ImageView smokeButton = new ImageView(this);
    RelativeLayout rl3 = new RelativeLayout(this);
    rl3.addView(smokeButton);
    rl3.setGravity(Gravity.CENTER_HORIZONTAL | Gravity.CENTER_VERTICAL);
    
    heightScale = Globals.deviceHeight/1280.0f;
    
    //Lay out the buttons dynamically
    Bitmap bitmap = loadGraphic("steamButton.jpg");
    if(bitmap != null) {
      steamButton.setImageBitmap(bitmap);
      
      int layoutHeight = 2*(int)(Globals.deviceHeight - bitmap.getHeight());
      int layoutWidth = bitmap.getWidth();
      
      RelativeLayout.LayoutParams rlParams = new RelativeLayout.LayoutParams(layoutWidth, layoutHeight);
      addContentView(rl1, rlParams);
      
      steamButton.setOnClickListener(new OnClickListener() {
        @Override
        public void onClick(View arg0) {
          glRenderer.setToSteam();
        } 
      });
    }
    
    bitmap = loadGraphic("fireButton.jpg");
    if(bitmap != null) {
      fireButton.setImageBitmap(bitmap);
      
      int layoutHeight = 2*(int)(Globals.deviceHeight - bitmap.getHeight());
      int layoutWidth = 2*(int)Globals.deviceWidth - bitmap.getWidth();
      
      RelativeLayout.LayoutParams rlParams = new RelativeLayout.LayoutParams(layoutWidth, layoutHeight);
      addContentView(rl2, rlParams);
      
      fireButton.setOnClickListener(new OnClickListener() {
        @Override
        public void onClick(View arg0) {
          glRenderer.setToFire();
        } 
      });
    }
    
    bitmap = loadGraphic("smokeButton.jpg");
    if(bitmap != null) {
      smokeButton.setImageBitmap(bitmap);
      
      int layoutHeight = 2*(int)(Globals.deviceHeight - bitmap.getHeight());
      int layoutWidth = (int)Globals.deviceWidth;
      
      RelativeLayout.LayoutParams rlParams = new RelativeLayout.LayoutParams(layoutWidth, layoutHeight);
      addContentView(rl3, rlParams);
      
      smokeButton.setOnClickListener(new OnClickListener() {
        @Override
        public void onClick(View arg0) {
          glRenderer.setToBlackSmoke();
        } 
      });
    }
  }
  
  private Bitmap loadGraphic(String file) {
    Bitmap bitmap = null;
    try{
      InputStream is = getAssets().open(file); 
      int size = is.available(); 
      byte[] buffer = new byte[size]; 
      is.read(buffer, 0, size);
      is.close(); 
      
      BitmapFactory.Options opt = new BitmapFactory.Options(); 
      opt.inDither = false;
      opt.inPreferredConfig = Bitmap.Config.ARGB_8888;
      
      Bitmap tmp = BitmapFactory.decodeByteArray(buffer, 0, size, opt);
      bitmap = Bitmap.createScaledBitmap(tmp, (int)(tmp.getWidth()*heightScale), (int)(tmp.getHeight()*heightScale), true);
    }
    catch(Exception e) {
      
    }
    return bitmap;
  }

  @Override
  public boolean onCreateOptionsMenu(Menu menu) {
    // Inflate the menu; this adds items to the action bar if it is present.
    getMenuInflater().inflate(R.menu.main, menu);
    return true;
  }
  
  @Override 
    protected void onResume() { 
        super.onResume(); 

        glSurfaceView.onResume(); 
    } 

  @Override 
    protected void onPause() { 
        super.onPause(); 

        glSurfaceView.onPause(); 
    } 
}

Java Source Code List

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