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PODrawing a hero and moving it
 

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    <p>What is the best way drawing a hero and moving it? I just need the best code for doing that. Before writing this i found a way, but when i made the surface holder transparent, i realised that the code is drawing new bitmap in the front of the old one every milisecond. That way looks kind of laggy to me, but maymie i'm not right. Please help me. Actualy i'm kind of confused... </p> <p>Anyway, here's the code that i think is laggy: MainThread.java</p> <pre><code>/** * */ package com.workspace.pockethero; import android.graphics.Canvas; import android.util.Log; import android.view.SurfaceHolder; /** * @author impaler * * The Main thread which contains the game loop. The thread must have access to * the surface view and holder to trigger events every game tick. */ public class MainThread extends Thread { private static final String TAG = MainThread.class.getSimpleName(); // Surface holder that can access the physical surface private SurfaceHolder surfaceHolder; // The actual view that handles inputs // and draws to the surface private MainGamePanel gamePanel; // flag to hold game state private boolean running; public void setRunning(boolean running) { this.running = running; } public MainThread(SurfaceHolder surfaceHolder, MainGamePanel gamePanel) { super(); this.surfaceHolder = surfaceHolder; this.gamePanel = gamePanel; } @Override public void run() { Canvas canvas; canvas = this.surfaceHolder.lockCanvas(); Log.d(TAG, "Starting game loop"); while (running) { canvas = null; // try locking the canvas for exclusive pixel editing // in the surface try { synchronized (surfaceHolder) { // update game state this.gamePanel.update(); // render state to the screen // draws the canvas on the panel this.gamePanel.render(canvas); } } finally { // in case of an exception the surface is not left in // an inconsistent state if (canvas != null) { surfaceHolder.unlockCanvasAndPost(canvas); } } // end finally } } } </code></pre> <p>MainGamePanel.java</p> <pre><code>/** * */ package com.workspace.pockethero; import com.workspace.pockethero.model.Droid; import com.workspace.pockethero.buttons.*; import android.content.Context; import android.content.res.Resources; import android.graphics.BitmapFactory; import android.graphics.Canvas; import android.graphics.Color; import android.graphics.drawable.Drawable; import android.util.Log; import android.view.MotionEvent; import android.view.SurfaceHolder; import android.view.SurfaceView; import android.view.View; /** * @author impaler * This is the main surface that handles the ontouch events and draws * the image to the screen. */ public class MainGamePanel extends SurfaceView implements SurfaceHolder.Callback { private static final String TAG = MainGamePanel.class.getSimpleName(); private MainThread thread; public Droid droid; public Butt butt; public Butt1 butt1; public Butt2 butt2; public Butt3 butt3; public Buttz buttz; public Buttz1 buttz1; public Buttz2 buttz2; public Buttz3 buttz3; public Buttx buttx; public Build build; public int decentreX; public int decentreY; public int debottomA; public boolean moved; public boolean moved1; public boolean moved2; public boolean moved3; public boolean moved4; public boolean moved5; public boolean moved6; public boolean moved7; private Drawable myImage; public boolean mapPainted; public MainGamePanel(Context context) { super(context); // adding the callback (this) to the surface holder to intercept events getHolder().addCallback(this); // create droid and load bitmap decentreX = PocketHero.centreX; decentreY = PocketHero.centreY; debottomA = PocketHero.bottomA; droid = new Droid(BitmapFactory.decodeResource(getResources(), R.drawable.herod), decentreX, decentreY); butt = new Butt(BitmapFactory.decodeResource(getResources(), R.drawable.button), 110, debottomA - 70); butt1 = new Butt1(BitmapFactory.decodeResource(getResources(), R.drawable.button1), 70, debottomA - 110); butt2 = new Butt2(BitmapFactory.decodeResource(getResources(), R.drawable.button2), 30, debottomA - 70); butt3 = new Butt3(BitmapFactory.decodeResource(getResources(), R.drawable.button3), 70, debottomA - 30); buttz = new Buttz(BitmapFactory.decodeResource(getResources(), R.drawable.zbutton), 110, debottomA - 110); buttz1 = new Buttz1(BitmapFactory.decodeResource(getResources(), R.drawable.zbutton1), 30, debottomA - 110); buttz2 = new Buttz2(BitmapFactory.decodeResource(getResources(), R.drawable.zbutton2), 30, debottomA - 30); buttz3 = new Buttz3(BitmapFactory.decodeResource(getResources(), R.drawable.zbutton3), 110, debottomA - 30); buttx = new Buttx(BitmapFactory.decodeResource(getResources(), R.drawable.xbutton), 70, debottomA - 70); build = new Build(BitmapFactory.decodeResource(getResources(), R.drawable.building), 500, 200); // create the game loop thread //300 indicates start position of bitmapfield on screen thread = new MainThread(getHolder(), this); // make the GamePanel focusable so it can handle events setFocusable(true); this.setOnTouchListener(new OnTouchListener() { public boolean onTouch(View V, MotionEvent event) { if (event.getAction() == MotionEvent.ACTION_DOWN) { // delegating event handling to the droid handleActionDown((int)event.getX(), (int)event.getY()); } if (event.getAction() == MotionEvent.ACTION_MOVE) { handleActionDown((int)event.getX(), (int)event.getY()); // the gestures } if (event.getAction() == MotionEvent.ACTION_UP) { // touch was released if (droid.touched) { droid.setTouched(false); } if (droid.touched1) { droid.setTouched1(false); } if (droid.touched2) { droid.setTouched2(false); } if (droid.touched3) { droid.setTouched3(false); } } return true; } }); } public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) { } public void surfaceCreated(SurfaceHolder holder) { // at this point the surface is created and // we can safely start the game loop thread.setRunning(true); thread.start(); } public void surfaceDestroyed(SurfaceHolder holder) { Log.d(TAG, "Surface is being destroyed"); // tell the thread to shut down and wait for it to finish // this is a clean shutdown boolean retry = true; while (retry) { try { thread.join(); retry = false; } catch (InterruptedException e) { // try again shutting down the thread } } Log.d(TAG, "Thread was shut down cleanly"); } public void render(Canvas canvas) { canvas.drawColor(Color.TRANSPARENT); droid.draw(canvas); butt.draw(canvas); butt1.draw(canvas); butt2.draw(canvas); butt3.draw(canvas); buttz.draw(canvas); buttz1.draw(canvas); buttz2.draw(canvas); buttz3.draw(canvas); buttx.draw(canvas); } /** * This is the game update method. It iterates through all the objects * and calls their update method if they have one or calls specific * engine's update method. */ public void update() { droid.update(); } public void handleActionDown(int eventX, int eventY) { if (eventX &gt;= (butt.x - butt.bitmap.getWidth() / 2) &amp;&amp; (eventX &lt;= (butt.x + butt.bitmap.getWidth()/2))) { if (eventY &gt;= (buttz.y - buttz.bitmap.getHeight() / 2) &amp;&amp; (eventY &lt;= (buttz3.y + buttz3.bitmap.getHeight() / 2))) { // droid touched droid.setTouched(true); } else { droid.setTouched(false); } } else { droid.setTouched(false); } if (eventX &gt;= (buttz1.x - buttz1.bitmap.getWidth() / 2) &amp;&amp; (eventX &lt;= (buttz.x + buttz.bitmap.getWidth()/2))) { if (eventY &gt;= (butt1.y - butt1.bitmap.getHeight() / 2) &amp;&amp; (eventY &lt;= (butt1.y + butt1.bitmap.getHeight() / 2))) { // droid touched droid.setTouched1(true); } else { droid.setTouched1(false); } }else { droid.setTouched1(false); } if (eventX &gt;= (butt2.x - butt2.bitmap.getWidth() / 2) &amp;&amp; (eventX &lt;= (butt2.x + butt2.bitmap.getWidth()/2))) { if (eventY &gt;= (buttz1.y - buttz1.bitmap.getHeight() / 2) &amp;&amp; (eventY &lt;= (buttz2.y + buttz2.bitmap.getHeight() / 2))) { // droid touched droid.setTouched2(true); } else { droid.setTouched2(false); } }else { droid.setTouched2(false); } if (eventX &gt;= (buttz2.x - buttz2.bitmap.getWidth() / 2) &amp;&amp; (eventX &lt;= (buttz3.x + buttz3.bitmap.getWidth()/2))) { if (eventY &gt;= (butt3.y - butt3.bitmap.getHeight() / 2) &amp;&amp; (eventY &lt;= (butt3.y + butt3.bitmap.getHeight() / 2))) { // droid touched droid.setTouched3(true); } else { droid.setTouched3(false); } }else { droid.setTouched3(false); } if (droid.touched &amp; !droid.touched1 &amp; !droid.touched3) { if (!moved) { droid.bitmap = BitmapFactory.decodeResource(getResources(), R.drawable.heror); moved = true; } }else { moved = false; }if (droid.touched1 &amp; !droid.touched &amp; !droid.touched2){ if (!moved1) { droid.bitmap = BitmapFactory.decodeResource(getResources(), R.drawable.herou); moved1 = true; } }else { moved1 = false; } if (droid.touched2 &amp; !droid.touched1 &amp; !droid.touched3){ if (!moved2) { droid.bitmap = BitmapFactory.decodeResource(getResources(), R.drawable.herol); moved2 = true; } }else { moved2 = false; } if (droid.touched3 &amp; !droid.touched2 &amp; !droid.touched){ if (!moved7) { droid.bitmap = BitmapFactory.decodeResource(getResources(), R.drawable.herod); moved7 = true; } }else { moved7 = false; } if (droid.touched &amp; droid.touched1){ if (!moved3) { droid.bitmap = BitmapFactory.decodeResource(getResources(), R.drawable.herour); moved3 = true; } }else { moved3 = false; } if (droid.touched1 &amp; droid.touched2){ if (!moved4) { droid.bitmap = BitmapFactory.decodeResource(getResources(), R.drawable.heroul); moved4 = true; } }else { moved4 = false; } if (droid.touched2 &amp; droid.touched3){ if (!moved5) { droid.bitmap = BitmapFactory.decodeResource(getResources(), R.drawable.herodl); moved5 = true; } }else { moved5 = false; } if (droid.touched3 &amp; droid.touched){ if (!moved6) { droid.bitmap = BitmapFactory.decodeResource(getResources(), R.drawable.herodr); moved6 = true; } }else { moved6 = false; } } } </code></pre> <p>and the Droid.java</p> <pre><code>/** * */ package com.workspace.pockethero.model; import android.graphics.Bitmap; import android.graphics.Canvas; /** * This is a test droid that is dragged, dropped, moved, smashed against * the wall and done other terrible things with. * Wait till it gets a weapon! * * @author impaler * */ public class Droid { public Bitmap bitmap; // the actual bitmap public int x; // the X coordinate public int y; // the Y coordinate public boolean touched; // if droid is touched/picked up public boolean touched1; // if droid is touched/picked up public boolean touched2; // if droid is touched/picked up public boolean touched3; // if droid is touched/picked up public Droid(Bitmap bitmap, int x, int y) { this.bitmap = bitmap; this.x = x; this.y = y; } public Bitmap getBitmap() { return bitmap; } public void setBitmap(Bitmap bitmap) { this.bitmap = bitmap; } public int getX() { return x; } public void setX(int x) { this.x = x; } public int getY() { return y; } public void setY(int y) { this.y = y; } public void draw(Canvas canvas) { canvas.drawBitmap(bitmap, x - (bitmap.getWidth() / 2), y - (bitmap.getHeight() / 2), null); } /** * Method which updates the droid's internal state every tick */ public void setTouched(boolean touched) { this.touched = touched; } public boolean isTouched() { return touched; } public void setTouched1(boolean touched) { this.touched1 = touched; } public boolean isTouched1() { return touched1; } public void setTouched2(boolean touched) { this.touched2 = touched; } public boolean isTouched2() { return touched2; } public void setTouched3(boolean touched) { this.touched3 = touched; } public boolean isTouched3() { return touched3; } public void update() { if (touched &amp; !touched1 &amp; !touched3) { x += 1; }else if (touched1 &amp; !touched &amp; !touched2){ y -= 1; }else if (touched2 &amp; !touched1 &amp; !touched3){ x -= 1; }else if (touched3 &amp; !touched2 &amp; !touched){ y += 1; }else if (touched &amp; touched1){ x += 1; y -= 1; }else if (touched1 &amp; touched2){ x -= 1; y -= 1; }else if (touched2 &amp; touched3){ x -= 1; y += 1; }else if (touched3 &amp; touched){ x += 1; y += 1; } } /** * Handles the {@link MotionEvent.ACTION_DOWN} event. If the event happens on the * bitmap surface then the touched state is set to &lt;code&gt;true&lt;/code&gt; otherwise to &lt;code&gt;false&lt;/code&gt; * @param eventX - the event's X coordinate * @param eventY - the event's Y coordinate */ } </code></pre> <p>there are also other classes created for each button, but i didnt pasted them here, because the are practicly the same as droid.java</p>
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