android.widget.EditText#dispatchKeyEvent ( )源码实例Demo

public static void backspace(EditText input) {
    if (input == null) {
        return;
    }
    KeyEvent event = new KeyEvent(0, 0, 0, KeyEvent.KEYCODE_DEL, 0, 0, 0, 0, KeyEvent.KEYCODE_ENDCALL);
    input.dispatchKeyEvent(event);
}
 

@Override
public void onFaceItemClick(FacePanelView view, String face, int faceId) {
    View focusView = getCurrentFocus();
    if (focusView != null && focusView instanceof EditText) {
        EditText editText = (EditText) focusView;
        int index = editText.getSelectionStart();
        if (FacePanelView.KEY_DELETE.equals(face)) {
            //发送删除事件
            if (index > 0) {
                editText.dispatchKeyEvent(new KeyEvent(KeyEvent.ACTION_DOWN, KeyEvent.KEYCODE_DEL));
            }
        } else {
            face = "{:" + face + ":}";
            int size = SizeUtils.dp2px(20);
            Drawable drawable = getResources().getDrawable(faceId);
            drawable.setBounds(0, 0, size, size);
            ImageSpan imageSpan = new ImageSpan(drawable, ALIGN_BOTTOM);
            SpannableString spannableString = new SpannableString(face);
            spannableString.setSpan(imageSpan, 0, face.length(), Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
            if (index < 0 || index >= editText.getText().length()) {
                editText.getEditableText().append(spannableString);
            } else {
                editText.getEditableText().insert(index, spannableString);
            }

            editText.setSelection(index + face.length());
        }
    }
}
 

public static void backspace(EditText editText) {
    if (editText == null) {
        return;
    }
    KeyEvent event = new KeyEvent(0, 0, 0, KeyEvent.KEYCODE_DEL, 0, 0, 0,
            0, KeyEvent.KEYCODE_ENDCALL);
    editText.dispatchKeyEvent(event);
}
 

static void backspace(@NonNull final EditText editText) {
  final KeyEvent event = new KeyEvent(0, 0, 0, KeyEvent.KEYCODE_DEL, 0, 0, 0, 0, KeyEvent.KEYCODE_ENDCALL);
  editText.dispatchKeyEvent(event);
}
 

public static void backspace(EditText editText) {
    KeyEvent event = new KeyEvent(0, 0, 0, KeyEvent.KEYCODE_DEL, 0, 0, 0, 0, KeyEvent.KEYCODE_ENDCALL);
    editText.dispatchKeyEvent(event);
}
 

public static void delete(EditText editText) {
    KeyEvent event = new KeyEvent(0, 0, 0, KeyEvent.KEYCODE_DEL, 0, 0, 0, 0, KeyEvent.KEYCODE_ENDCALL);
    editText.dispatchKeyEvent(event);
}
 

private static void pressKeys(EditText editText, int... keycodes) {
  for (int key : keycodes) {
    editText.dispatchKeyEvent(new KeyEvent(0, 0, KeyEvent.ACTION_DOWN, key, 0));
    editText.dispatchKeyEvent(new KeyEvent(0, 0, KeyEvent.ACTION_UP, key, 0));
  }
}
 

public static void backspace(EditText editText) {
    KeyEvent event = new KeyEvent(0, 0, 0, KeyEvent.KEYCODE_DEL, 0, 0, 0, 0, KeyEvent.KEYCODE_ENDCALL);
    editText.dispatchKeyEvent(event);
}
 

public static void backspace(EditText editText) {
    KeyEvent event = new KeyEvent(0, 0, 0, KeyEvent.KEYCODE_DEL, 0, 0, 0, 0, KeyEvent.KEYCODE_ENDCALL);
    editText.dispatchKeyEvent(event);
}
 

public static void backspace(EditText editText) {
    KeyEvent event = new KeyEvent(0, 0, 0, KeyEvent.KEYCODE_DEL, 0, 0, 0, 0, KeyEvent.KEYCODE_ENDCALL);
    editText.dispatchKeyEvent(event);
}