@Override public boolean dispatchTouchEvent(MotionEvent event) { final int action = event.getAction(); final float y = event.getY(); final int oldChoose = choose; final OnTouchingLetterChangedListener listener = onTouchingLetterChangedListener; final int c = (int) (y / getHeight() * b.length); switch (action) { case MotionEvent.ACTION_DOWN: showBkg = true; if (oldChoose != c && listener != null) { if (c >= 0 && c < b.length) { listener.onTouchingLetterChanged(b[c]); choose = c; invalidate(); } } break; case MotionEvent.ACTION_MOVE: if (oldChoose != c && listener != null) { if (c >= 0 && c < b.length) { listener.onTouchingLetterChanged(b[c]); choose = c; invalidate(); } } break; case MotionEvent.ACTION_UP: showBkg = false; choose = -1; invalidate(); break; } return true; }
@SuppressWarnings("deprecation") @Override public boolean dispatchTouchEvent(MotionEvent event) { final int action = event.getAction(); final float y = event.getY(); // 点击y坐标 final int oldChoose = choose; final OnTouchingLetterChangedListener listener = onTouchingLetterChangedListener; final int c = (int) (y / getHeight() * b.length); // 点击y坐标所占总高度的比例*b数组的长度就等于点击b中的个数. switch (action) { case MotionEvent.ACTION_UP: setBackgroundDrawable(new ColorDrawable(0x00000000)); choose = -1; // invalidate(); if (mTextDialog != null) { mTextDialog.setVisibility(View.INVISIBLE); } break; default: // 设置右侧字母列表[A,B,C,D,E....]的背景颜色 setBackgroundResource(R.drawable.letter_sort_background); if (oldChoose != c) { if (c >= 0 && c < b.length) { if (listener != null) { listener.onTouchingLetterChanged(b[c]); } if (mTextDialog != null) { mTextDialog.setText(b[c]); mTextDialog.setVisibility(View.VISIBLE); } choose = c; invalidate(); } } break; } return true; }
@Override public boolean dispatchTouchEvent(MotionEvent event) { final int action = event.getAction(); float y = event.getY(); final int oldChoose = choose; final OnTouchingLetterChangedListener listener = onTouchingLetterChangedListener; final int c = (int) (y / getHeight() * b.length); switch (action) { case MotionEvent.ACTION_UP: setBackgroundDrawable(new ColorDrawable(0x00000000)); choose = -1; // invalidate(); if (mTextDialog != null) { mTextDialog.setVisibility(View.INVISIBLE); } break; default: setBackgroundResource(R.drawable.scrollbar_bg); if (oldChoose != c) { if (c >= 0 && c < b.length) { if (listener != null) { listener.onTouchingLetterChanged(b[c]); } if (mTextDialog != null) { mTextDialog.setText(b[c]); mTextDialog.setVisibility(View.VISIBLE); } choose = c; invalidate(); } } break; } return true; }