jMonkeyEngine/engine/src/android/com/jme3/app/AndroidHarness.java

package com.jme3.app;

import android.app.Activity;
import android.app.AlertDialog;
import android.content.DialogInterface;
import android.content.pm.ActivityInfo;
import android.graphics.drawable.Drawable;
import android.graphics.drawable.NinePatchDrawable;
import android.opengl.GLSurfaceView;
import android.os.Bundle;
import android.view.Display;
import android.view.Gravity;
import android.view.View;
import android.view.ViewGroup.LayoutParams;
import android.view.Window;
import android.view.WindowManager;
import android.widget.FrameLayout;
import android.widget.ImageView;
import android.widget.TextView;
import com.jme3.input.android.AndroidInput;
import com.jme3.input.controls.TouchListener;
import com.jme3.input.event.TouchEvent;
import com.jme3.system.AppSettings;
import com.jme3.system.JmeSystem;
import com.jme3.system.android.AndroidConfigChooser.ConfigType;
import com.jme3.system.android.JmeAndroidSystem;
import com.jme3.system.android.OGLESContext;
import com.jme3.util.JmeFormatter;
import java.io.PrintStream;
import java.io.PrintWriter;
import java.io.StringWriter;
import java.util.logging.Handler;
import java.util.logging.Level;
import java.util.logging.Logger;

/**
 * <code>AndroidHarness</code> wraps a jme application object and runs it on
 * Android
 *
 * @author Kirill
 * @author larynx
 */
public class AndroidHarness extends Activity implements TouchListener, DialogInterface.OnClickListener {

    protected final static Logger logger = Logger.getLogger(AndroidHarness.class.getName());
    
    /**
     * The application class to start
     */
    protected String appClass = "jme3test.android.Test";
    
    /**
     * The jme3 application object
     */
    protected Application app = null;
    
    /**
     * ConfigType.FASTEST is RGB565, GLSurfaceView default ConfigType.BEST is
     * RGBA8888 or better if supported by the hardware
     */
    protected ConfigType eglConfigType = ConfigType.FASTEST;
    
    /**
     * If true all valid and not valid egl configs are logged
     */
    protected boolean eglConfigVerboseLogging = false;
    
    /**
     * If true MouseEvents are generated from TouchEvents
     */
    protected boolean mouseEventsEnabled = true;
    
    /**
     * Flip X axis
     */
    protected boolean mouseEventsInvertX = true;
    
    /**
     * Flip Y axis
     */
    protected boolean mouseEventsInvertY = true;
    
    /**
     * Title of the exit dialog, default is "Do you want to exit?"
     */
    protected String exitDialogTitle = "Do you want to exit?";
    
    /**
     * Message of the exit dialog, default is "Use your home key to bring this
     * app into the background or exit to terminate it."
     */
    protected String exitDialogMessage = "Use your home key to bring this app into the background or exit to terminate it.";
    /**
     * Set the screen window mode. 
     * If screenFullSize is true, then the notification bar and title bar are 
     * removed and the screen covers the entire display.  
     * If screenFullSize is false, then the notification bar remains visible if 
     * screenShowTitle is true while screenFullScreen is false, 
     * then the title bar is also displayed under the notification bar.
     */
    protected boolean screenFullScreen = true;
    
    /**
     * if screenShowTitle is true while screenFullScreen is false, then the
     * title bar is also displayed under the notification bar
     */
    protected boolean screenShowTitle = true;
    
    /**
     * Splash Screen picture Resource ID. If a Splash Screen is desired, set
     * splashPicID to the value of the Resource ID (i.e. R.drawable.picname). If
     * splashPicID = 0, then no splash screen will be displayed.
     */
    protected int splashPicID = 0;
    
    /**
     * Set the screen orientation, default is SENSOR
     * ActivityInfo.SCREEN_ORIENTATION_* constants package
     * android.content.pm.ActivityInfo
     *
     * SCREEN_ORIENTATION_UNSPECIFIED SCREEN_ORIENTATION_LANDSCAPE
     * SCREEN_ORIENTATION_PORTRAIT SCREEN_ORIENTATION_USER
     * SCREEN_ORIENTATION_BEHIND SCREEN_ORIENTATION_SENSOR (default)
     * SCREEN_ORIENTATION_NOSENSOR
     */
    protected int screenOrientation = ActivityInfo.SCREEN_ORIENTATION_SENSOR;
    protected OGLESContext ctx;
    protected GLSurfaceView view = null;
    protected boolean isGLThreadPaused = true;
    private ImageView splashImageView = null;
    private FrameLayout frameLayout = null;
    final private String ESCAPE_EVENT = "TouchEscape";

    static {
        try {
            System.loadLibrary("bulletjme");
        } catch (UnsatisfiedLinkError e) {
        }
        JmeSystem.setSystemDelegate(new JmeAndroidSystem());
    }

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        Logger log = logger;
        boolean bIsLogFormatSet = false;
        do {
            if (log.getHandlers().length == 0) {
                log = logger.getParent();
                if (log != null) {
                    for (Handler h : log.getHandlers()) {
                        //h.setFormatter(new SimpleFormatter());
                        h.setFormatter(new JmeFormatter());
                        bIsLogFormatSet = true;
                    }
                }
            }
        } while (log != null && !bIsLogFormatSet);

        JmeAndroidSystem.setResources(getResources());
        JmeAndroidSystem.setActivity(this);

        if (screenFullScreen) {
            requestWindowFeature(Window.FEATURE_NO_TITLE);
            getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
                    WindowManager.LayoutParams.FLAG_FULLSCREEN);
        } else {
            if (!screenShowTitle) {
                requestWindowFeature(Window.FEATURE_NO_TITLE);
            }
        }

        setRequestedOrientation(screenOrientation);

        // Create Settings
        AppSettings settings = new AppSettings(true);

        // Create the input class
        AndroidInput input = new AndroidInput(this);
        input.setMouseEventsInvertX(mouseEventsInvertX);
        input.setMouseEventsInvertY(mouseEventsInvertY);
        input.setMouseEventsEnabled(mouseEventsEnabled);

        // Create application instance
        try {
            if (app == null) {
                @SuppressWarnings("unchecked")
                Class<? extends Application> clazz = (Class<? extends Application>) Class.forName(appClass);
                app = clazz.newInstance();
            }

            app.setSettings(settings);
            app.start();
            ctx = (OGLESContext) app.getContext();
            view = ctx.createView(input, eglConfigType, eglConfigVerboseLogging);

            // Set the screen reolution
            WindowManager wind = this.getWindowManager();
            Display disp = wind.getDefaultDisplay();
            ctx.getSettings().setResolution(disp.getWidth(), disp.getHeight());

            AppSettings s = ctx.getSettings();
            logger.log(Level.INFO, "Settings: Width {0} Height {1}", new Object[]{s.getWidth(), s.getHeight()});

            layoutDisplay();
        } catch (Exception ex) {
            handleError("Class " + appClass + " init failed", ex);
            setContentView(new TextView(this));
        }
    }

    @Override
    protected void onRestart() {
        super.onRestart();
        if (app != null) {
            app.restart();
        }
        logger.info("onRestart");
    }

    @Override
    protected void onStart() {
        super.onStart();
        logger.info("onStart");
    }

    @Override
    protected void onResume() {
        super.onResume();
        if (view != null) {
            view.onResume();
        }
        isGLThreadPaused = false;
        logger.info("onResume");
    }

    @Override
    protected void onPause() {
        super.onPause();
        if (view != null) {
            view.onPause();
        }
        isGLThreadPaused = true;
        logger.info("onPause");
    }

    @Override
    protected void onStop() {
        super.onStop();
        logger.info("onStop");
    }

    @Override
    protected void onDestroy() {
        if (app != null) {
            app.stop(!isGLThreadPaused);
        }
        logger.info("onDestroy");
        super.onDestroy();
    }

    public Application getJmeApplication() {
        return app;
    }

    /**
     * Called when an error has occurred. 
     * By default, will show an error message to the user 
     * and print the exception/error to the log.
     */
    public void handleError(final String errorMsg, final Throwable t) {
        String stackTrace = "";
        String title = "Error";
        
        if (t != null){
            // Convert exception to string
            StringWriter sw = new StringWriter(100);
            t.printStackTrace(new PrintWriter(sw));
            stackTrace = sw.toString();
            title = t.toString();
        }
        
        final String finalTitle = title; 
        final String finalMsg = (errorMsg != null ? errorMsg : "Uncaught Exception") 
                                + "\n" + stackTrace;

        logger.log(Level.SEVERE, finalMsg);

        runOnUiThread(new Runnable() {
            @Override
            public void run() {
                AlertDialog dialog = new AlertDialog.Builder(AndroidHarness.this) // .setIcon(R.drawable.alert_dialog_icon)
                                        .setTitle(finalTitle)
                                        .setPositiveButton("Kill", AndroidHarness.this)
                                        .setMessage(finalMsg).create();
                dialog.show();
            }
        });
    }

    /**
     * Called by the android alert dialog, terminate the activity and OpenGL
     * rendering
     *
     * @param dialog
     * @param whichButton
     */
    public void onClick(DialogInterface dialog, int whichButton) {
        if (whichButton != -2) {
            if (app != null) {
                app.stop(true);
            }
            this.finish();
        }
    }

    /**
     * Gets called by the InputManager on all touch/drag/scale events
     */
    @Override
    public void onTouch(String name, TouchEvent evt, float tpf) {
        if (name.equals(ESCAPE_EVENT)) {
            switch (evt.getType()) {
                case KEY_UP:
                    runOnUiThread(new Runnable() {
                        @Override
                        public void run() {
                            AlertDialog dialog = new AlertDialog.Builder(AndroidHarness.this) // .setIcon(R.drawable.alert_dialog_icon)
                                    .setTitle(exitDialogTitle)
                                    .setPositiveButton("Yes", AndroidHarness.this)
                                    .setNegativeButton("No", AndroidHarness.this)
                                    .setMessage(exitDialogMessage).create();
                            dialog.show();
                        }
                    });
                    break;
                default:
                    break;
            }
        }
    }

    public void layoutDisplay() {
        logger.log(Level.INFO, "Splash Screen Picture Resource ID: {0}", splashPicID);
        if (splashPicID != 0) {
            FrameLayout.LayoutParams lp = new FrameLayout.LayoutParams(
                    LayoutParams.FILL_PARENT,
                    LayoutParams.FILL_PARENT,
                    Gravity.CENTER);

            frameLayout = new FrameLayout(this);
            splashImageView = new ImageView(this);

            Drawable drawable = this.getResources().getDrawable(splashPicID);
            if (drawable instanceof NinePatchDrawable) {
                splashImageView.setBackgroundDrawable(drawable);
            } else {
                splashImageView.setImageResource(splashPicID);
            }

            frameLayout.addView(view);
            frameLayout.addView(splashImageView, lp);

            setContentView(frameLayout);
            logger.log(Level.INFO, "Splash Screen Created");
        } else {
            logger.log(Level.INFO, "Splash Screen Skipped.");
            setContentView(view);
        }
    }

    public void removeSplashScreen() {
        logger.log(Level.INFO, "Splash Screen Picture Resource ID: {0}", splashPicID);
        if (splashPicID != 0) {
            if (frameLayout != null) {
                if (splashImageView != null) {
                    this.runOnUiThread(new Runnable() {

                        @Override
                        public void run() {
                            splashImageView.setVisibility(View.INVISIBLE);
                            frameLayout.removeView(splashImageView);
                        }
                    });
                } else {
                    logger.log(Level.INFO, "splashImageView is null");
                }
            } else {
                logger.log(Level.INFO, "frameLayout is null");
            }
        }
    }
}