Question

我正在为Android开发游戏。在阶段之间，我希望显示带有路线的地图的一部分，并将其从一个城市移动到另一个城市（从舞台到舞台）。

首先我想在我的手机上做这个，这是三星Galaxy Y，240x320 Qvga ldpi。

所以我有jpg格式的地图文件。这张照片是2463x602，这是一张世界地图。我做到了，除了一件事，一切都完成了。这个“动画”对我来说很慢。

当我开始这个时，我想，它会如此之快，我会用Thread.sleep（）处理速度;但问题是，它并不快。

我怎样才能让它更快？这是我的代码：

package hu.mycompany.myproject;

import android.app.Activity;
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.graphics.Rect;
import android.media.AudioManager;
import android.media.SoundPool;
import android.os.Bundle;
import android.util.Log;
import android.view.Menu;
import android.view.SurfaceHolder;
import android.view.SurfaceView;

public class MapActivity extends Activity {

    DrawView drawView;
    SoundPool soundPool;
    int soundId;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        this.setVolumeControlStream(AudioManager.STREAM_MUSIC);
        soundPool = new SoundPool(1, AudioManager.STREAM_MUSIC, 0);
        soundId = soundPool.load(this, R.raw.airplane, 1);
        drawView = new DrawView(this);
        setContentView(drawView);
    }

    public void playSound() {
        soundPool.play(soundId, 1f, 1f, 1, 0, 1f);
    }

    @Override
    public void onResume() {
        super.onResume();
        playSound();
        drawView.resume();
    }

    @Override
    public void onPause() {
        super.onPause();
        drawView.pause();
    }

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

    public class DrawView extends SurfaceView implements Runnable {
        Bitmap gameMap = null;
        Thread gameLoop = null;
        SurfaceHolder surface;
        Rect rect;
        volatile boolean running;
        volatile boolean moved;

        public DrawView(Context context) {
            super(context);
            moved = false;
            surface = getHolder();
            gameMap = BitmapFactory.decodeResource(getResources(),
                    R.drawable.map);

        }

        public void resume() {
            running = true;
            gameLoop = new Thread(this);
            gameLoop.start();
        }

        public void pause() {
            running = false;
            while (true) {
                try {
                    gameLoop.join();
                } catch (InterruptedException e) {

                }
            }
        }

        @Override
        public void run() {
            Rect canvasSize = new Rect(0, 0, 240, 320);
            Paint paint = new Paint();
            paint.setAntiAlias(true);
            while (running) {
                if (!surface.getSurface().isValid()) {
                    continue;
                }
                if (!moved) {
                    int i;
                    for (i = 80; i <= 830; i++) {
                        Canvas canvas = surface.lockCanvas();
                        rect = new Rect(i, 250, (i + 240), 570);
                        canvas.drawBitmap(gameMap, rect, canvasSize, paint);
                        surface.unlockCanvasAndPost(canvas);
                    }
                    moved = true;
                }
            }
        }

    }

}

Answer 1

1 - 尝试通过导出来减少图片大小保存为photoshop中的web并选择png作为扩展类型 2-你应该创建两个用于处理线程的类和用于渲染和游戏逻辑的其他类。线程将在系统渲染时通过锁定画布来管理它。看看这个链接 http://android-er.blogspot.com/2010/05/android-surfaceview.html

使用SurfaceView移动位图很慢

1 个答案: