Android example source code file (GLES20Activity.java)

This example Android source code file (GLES20Activity.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Android by Example" ^TM.

Java - Android tags/keywords

activitymanager, android, app, application, configurationinfo, content, gles20activity, gles20trianglerenderer, glsurfaceview, opengl, os, override

The GLES20Activity.java Android example source code

/*
 * Copyright (C) 2009 The Android Open Source Project
 *
 * 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.example.android.apis.graphics;

import android.app.Activity;
import android.app.ActivityManager;
import android.content.Context;
import android.content.pm.ConfigurationInfo;
import android.opengl.GLSurfaceView;
import android.os.Bundle;

/**
 * This sample shows how to check for OpenGL ES 2.0 support at runtime, and then
 * use either OpenGL ES 1.0 or OpenGL ES 2.0, as appropriate.
 */
public class GLES20Activity extends Activity {
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        mGLSurfaceView = new GLSurfaceView(this);
        if (detectOpenGLES20()) {
            // Tell the surface view we want to create an OpenGL ES 2.0-compatible
            // context, and set an OpenGL ES 2.0-compatible renderer.
            mGLSurfaceView.setEGLContextClientVersion(2);
            mGLSurfaceView.setRenderer(new GLES20TriangleRenderer(this));
        } else {
            // Set an OpenGL ES 1.x-compatible renderer. In a real application
            // this renderer might approximate the same output as the 2.0 renderer.
            mGLSurfaceView.setRenderer(new TriangleRenderer(this));
        }
        setContentView(mGLSurfaceView);
    }

    private boolean detectOpenGLES20() {
        ActivityManager am =
            (ActivityManager) getSystemService(Context.ACTIVITY_SERVICE);
        ConfigurationInfo info = am.getDeviceConfigurationInfo();
        return (info.reqGlEsVersion >= 0x20000);
    }

    @Override
    protected void onResume() {
        // Ideally a game should implement onResume() and onPause()
        // to take appropriate action when the activity looses focus
        super.onResume();
        mGLSurfaceView.onResume();
    }

    @Override
    protected void onPause() {
        // Ideally a game should implement onResume() and onPause()
        // to take appropriate action when the activity looses focus
        super.onPause();
        mGLSurfaceView.onPause();
    }

    private GLSurfaceView mGLSurfaceView;
}