java - android 中如何计算按钮按下时间？

Question

我正在开发一个项目，其中我想要在不同的时间执行不同的任务，例如，如果用户在 5 毫秒后按下按钮，则执行代码，如果按下时间超过该时间，则执行不同的任务

实际上他们正在创建一个聊天头，就像在 Facebook 聊天中一样

问题是在我想打开或启动我的应用程序的 ActionDown 事件上

但问题是当用户尝试将聊天头从一个位置重新分配到另一个位置时，事件会触发就像

 This is my code

在 ACTION_DOWN 事件中我想 Intent 应用程序

      public class ChadHead extends Service {
  private final Handler mHandler = new Handler();
    private Runnable mTimer1;
private WindowManager windowManager;
private ImageView chatHead;
Display display;
int width;
    int count=0;


@Override
public IBinder onBind(Intent intent) {
    // Not used
    return null;
}

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

     mTimer1 = new Runnable() {

            @Override
            public void run() {
                count++;
                // TODO Auto-generated method stub
                mHandler.postDelayed(this, 5000);
                if (count == 1) {
                    mHandler.removeCallbacks(mTimer1);
                    // put your code here:
                }
            }
        };



    windowManager = (WindowManager) getSystemService(WINDOW_SERVICE);

    chatHead = new ImageView(this);
    chatHead.setImageResource(R.drawable.ic_launcher);

    final WindowManager.LayoutParams params = new WindowManager.LayoutParams(
            WindowManager.LayoutParams.WRAP_CONTENT,
            WindowManager.LayoutParams.WRAP_CONTENT,
            WindowManager.LayoutParams.TYPE_PHONE,
            WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE,
            PixelFormat.TRANSLUCENT);

    params.gravity = Gravity.TOP | Gravity.LEFT;
    params.x = 0;
    params.y = 100;

    windowManager.addView(chatHead, params);

    chatHead.setOnTouchListener(new View.OnTouchListener() {
        private int initialX;
        private int initialY;
        private float initialTouchX;
        private float initialTouchY;

        @SuppressWarnings("deprecation")
        @Override
        public boolean onTouch(View v, MotionEvent event) {
            switch (event.getAction()) {
            case MotionEvent.ACTION_DOWN:
                initialX = params.x;
                initialY = params.y;
                initialTouchX = event.getRawX();
                initialTouchY = event.getRawY();

                 mHandler.postDelayed(mTimer1, 0);
                /*Intent i;
                PackageManager manager = getPackageManager();
                try {
                   i = manager.getLaunchIntentForPackage("com.technorapper.technorappermapp");
                if (i == null)
                    throw new PackageManager.NameNotFoundException();
                i.addCategory(Intent.CATEGORY_LAUNCHER);
                startActivity(i);
                } catch (PackageManager.NameNotFoundException e) {

                }*/


                Toast.makeText(getApplicationContext(), "TechnoRapper", 50)
                        .show();

                return true;
            case MotionEvent.ACTION_MOVE:
                params.x = initialX
                        + (int) (event.getRawX() - initialTouchX);
                params.y = initialY
                        + (int) (event.getRawY() - initialTouchY);
                windowManager.updateViewLayout(chatHead, params);

                display = windowManager.getDefaultDisplay();
                width = display.getWidth();

                return true;
            case MotionEvent.ACTION_UP:
                 count = 0;
                if (initialTouchX < width / 2) {
                    initialTouchX = 0;
                } else if (initialTouchX >= width / 2) {
                    initialTouchX = width;
                }
                return true;
            }
            return false;
        }
    });

}

@Override
public void onDestroy() {
    super.onDestroy();
    if (chatHead != null)
        windowManager.removeView(chatHead);
}
  }

Answer 1

我从 3 个月前就遇到了这个问题，这是我的解决方案:

 private int count = 0;
    Button btn;
    private final Handler mHandler = new Handler();
    private Runnable mTimer1;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        btn = (Button) findViewById(R.id.btn);
        mTimer1 = new Runnable() {

            @Override
            public void run() {
                count++;
                // TODO Auto-generated method stub
                mHandler.postDelayed(this, 500);
                if (count == 1) {
                    mHandler.removeCallbacks(mTimer1);
                    // put your code here:
                Intent i;
                PackageManager manager = getPackageManager();
                try {
                   i = manager.getLaunchIntentForPackage("com.technorapper.technorappermapp");
                if (i == null)
                    throw new PackageManager.NameNotFoundException();
                i.addCategory(Intent.CATEGORY_LAUNCHER);
                startActivity(i);
                } catch (PackageManager.NameNotFoundException e) {

                }

                }
            }
        };
        btn.setOnTouchListener(new OnTouchListener() {

            private int initialX;
            private int initialY;
            private float initialTouchX;
            private float initialTouchY;

            @Override
            public boolean onTouch(View v, final MotionEvent event) {
                switch (event.getAction()) {
                case MotionEvent.ACTION_DOWN:
                    initialX = (int) btn.getX();
                    initialY = (int) btn.getY();
                    initialTouchX = event.getRawX();
                    initialTouchY = event.getRawY();
                    mHandler.postDelayed(mTimer1, 0);
                    return true;
                case MotionEvent.ACTION_UP:
                    count = 0;
                    return true;
                case MotionEvent.ACTION_MOVE:
                    runOnUiThread(new Runnable() {
                        public void run() {
                            btn.setX(initialX
                                    + (int) (event.getRawX() - initialTouchX));
                            btn.setY(initialY
                                    + (int) (event.getRawY() - initialTouchY));
                        }
                    });

                    return true;
                }
                return false;
            }
        });

使用此代码，您可以移动聊天头，并且事件会在 500 毫秒后开始。不需要使用OnClickListener，检查位置是否没有改变，因此将其检测为OnClickListener。
如果您想在捕获某些操作时停止 OnTouch 事件，只需将“boolean 变量”放入 ACTION_MOVE