Question

请向下滚动到“编辑”：）

我正在尝试使用Android Studio了解一些基本的Android动画编程，我已经在互联网上学习了一些教程。我已经知道一些基本的java编程，但是我的“复制/粘贴应用程序”出了问题。

这是我的MainActivity：

public class MainActivity extends ActionBarActivity {
private Button play;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    play = (Button) findViewById(R.id.play_button);
    play.setOnClickListener(new View.OnClickListener() {

        public void onClick(View v) {
            Intent startGame = new Intent("com.abc.test.DRAWGAME2");
            startActivity(startGame);
        }
    });
}


@Override
public boolean onCreateOptionsMenu(Menu menu) {
    getMenuInflater().inflate(R.menu.menu_main, menu);
    return true;
}

@Override
public boolean onOptionsItemSelected(MenuItem item) {
    int id = item.getItemId();

    if (id == R.id.action_settings) {
        return true;
    }
    return super.onOptionsItemSelected(item);
}}

这是DrawGame2.java：

public class DrawGame2 extends Activity implements View.OnTouchListener {

private MyView surfaceView;
private float y;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    surfaceView = new MyView(this);
    surfaceView.setOnTouchListener(this);
    setContentView(surfaceView);
}

@Override
protected void onPause() {
    super.onPause();
    surfaceView.pause();
}

@Override
protected void onResume() {
    super.onResume();
    surfaceView.resume();
}

@Override
public boolean onTouch(View v, MotionEvent me) {

    try {
        Thread.sleep(50);
    } catch (InterruptedException e) {
        e.printStackTrace();
    }

    switch (me.getAction()){
        case MotionEvent.ACTION_DOWN:
            y = me.getY();
            break;
        case MotionEvent.ACTION_UP:
            y = me.getY();
            break;
        case MotionEvent.ACTION_MOVE:
            y = me.getY();
            break;
    }


    return true;
}

public class MyView extends SurfaceView implements Runnable {

    private Thread thread = null;
    private SurfaceHolder holder;
    private boolean isRunning = false;



    public MyView(Context context) {
        super(context);
        holder = getHolder();
        y = 0;
    }

    public void run() {
        while (isRunning) {
            if (!holder.getSurface().isValid()) {
                continue;
            }
            Canvas canvas = holder.lockCanvas();
            canvas.drawRGB(02,02,150);



            if (y != 0){
                Bitmap test = BitmapFactory.decodeResource(getResources(),R.drawable.greenball);
                canvas.drawBitmap(test, canvas.getWidth()/2 - test.getWidth()/2, y, null);
            }



            holder.unlockCanvasAndPost(canvas);
        }
    }

    public void pause() {
        isRunning = false;
        while (true) {
            try {
                thread.join();
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
            break;
        }
        thread = null;
    }

    public void resume() {
        isRunning = true;
        thread = new Thread(this);
        thread.start();
    }

}}

logcat的：

02-12 11:01:06.676    1972-1972/com.abc.test I/art﹕ Not late-enabling -Xcheck:jni (already on)
    02-12 11:01:06.881    1972-1990/com.abc.test D/OpenGLRenderer﹕ Render dirty regions requested: true
    02-12 11:01:06.882    1972-1972/com.abc.test D/﹕ HostConnection::get() New Host Connection established 0xa686fb60, tid 1972
    02-12 11:01:06.917    1972-1972/com.abc.test D/Atlas﹕ Validating map...
    02-12 11:01:07.007    1972-1990/com.abc.test D/﹕ HostConnection::get() New Host Connection established 0xa686fd90, tid 1990
    02-12 11:01:07.037    1972-1990/com.abc.test I/OpenGLRenderer﹕ Initialized EGL, version 1.4
    02-12 11:01:07.102    1972-1990/com.abc.test D/OpenGLRenderer﹕ Enabling debug mode 0
    02-12 11:01:07.126    1972-1990/com.abc.test W/EGL_emulation﹕ eglSurfaceAttrib not implemented
    02-12 11:01:07.126    1972-1990/com.abc.test W/OpenGLRenderer﹕ Failed to set EGL_SWAP_BEHAVIOR on surface 0xa6814940, error=EGL_SUCCESS
    02-12 11:01:07.705    1972-1990/com.abc.test W/EGL_emulation﹕ eglSurfaceAttrib not implemented
    02-12 11:01:07.705    1972-1990/com.abc.test W/OpenGLRenderer﹕ Failed to set EGL_SWAP_BEHAVIOR on surface 0xa6814940, error=EGL_SUCCESS
    02-12 11:01:12.571    1972-1990/com.abc.test W/EGL_emulation﹕ eglSurfaceAttrib not implemented
    02-12 11:01:12.571    1972-1990/com.abc.test W/OpenGLRenderer﹕ Failed to set EGL_SWAP_BEHAVIOR on surface 0xa5a69ba0, error=EGL_SUCCESS
    02-12 11:01:16.892    1972-1972/com.abc.test I/Choreographer﹕ Skipped 263 frames!  The application may be doing too much work on its main thread.
    02-12 11:01:16.899    1972-2270/com.abc.test D/﹕ HostConnection::get() New Host Connection established 0xa5dfcc10, tid 2270

这个应用程序的问题是动画真的很迟钝，我无法弄清楚原因！我试图用一个简单的矩形制作相同的动画，但滞后仍然存在。

问题不在于OnTouchListener，因为我试图在run方法中将每个循环的y值增加1（同时禁用OnTouchListener），但它仍然滞后。

我尝试过不同的模拟器（Lollipop，Kitkat）和三星Galaxy S3（Jelly Bean）。

有没有明智的人可以帮我解决这个问题？：）

祝你有美好的一天！

修改

好的，所以我应用了我得到的答案，现在它顺利运行，在我的Samung Galaxy S3上！

但是我的模拟器上仍然存在滞后现象。我已经安装了HAXM并且模拟器在我创建的应用程序中平稳运行，但是一旦我启动应用程序并按下“PLAY”按钮，当我与应用程序交互时动画就会滞后。

这是我的模拟器的属性：

    Name: Nexus_5_API_21
CPU/ABI: Intel Atom (x86)
hw.gpu.enabled: yes
Path: C:\Users\User\.android\avd\Nexus_5_API_21.avd
Target: Android 5.0.1 (API level 21)
Skin: nexus_5
SD Card: 100M
Snapshot: no
hw.lcd.density: 480
hw.dPad: no
avd.ini.encoding: UTF-8
hw.camera.back: none
disk.dataPartition.size: 200M
runtime.network.latency: none
skin.dynamic: no
hw.keyboard: yes
runtime.network.speed: full
hw.device.hash2: MD5:2fa0e16c8cceb7d385183284107c0c88
hw.ramSize: 1536
tag.id: default
tag.display: Default
hw.sdCard: yes
hw.device.manufacturer: Google
hw.mainKeys: no
hw.accelerometer: yes
hw.trackBall: no
hw.device.name: Nexus 5
hw.sensors.proximity: yes
hw.battery: yes
AvdId: Nexus_5_API_21
hw.sensors.orientation: yes
hw.audioInput: yes
hw.camera.front: none
hw.gps: yes
avd.ini.displayname: Nexus 5 API 21
snapshot.present: no
vm.heapSize: 64
runtime.scalefactor: auto

Answer 1

据我所知，您的问题出在onTouch()方法中，您可以使用此代码：

try{
    Thread.sleep(50);
}catch (InterruptedException e){
   e.printStackTrace();
}

将睡眠MAIN线程，这意味着所有内容都会使整个应用程序保持50毫秒。

所以试着删除它。

Answer 2

解码资源也不具备性能。您应该先解码位图并在绘图时重复使用它。为什么不使用onDraw方法？

Android动画滞后

2 个答案: