android中一些特殊字符（如：←↑→↓等箭头符号）的Unicode码值

<RelativeLayout      android:layout_width="0dp"      android:layout_height="match_parent"      android:layout_weight="1"      android:gravity="center_horizontal" >      <Button        android:id="@+id/scroll_left"        android:layout_width="40dip"        android:layout_height="40dip"        android:layout_alignParentLeft="true"        android:layout_centerVertical="true"        android:text="@string/left_arrow" />      <Button        android:id="@+id/scroll_up"        android:layout_width="40dip"        android:layout_height="40dip"        android:layout_alignParentTop="true"        android:layout_toRightOf="@id/scroll_left"        android:text="@string/up_arrow" />      <Button        android:id="@+id/scroll_down"        android:layout_width="40dip"        android:layout_height="40dip"        android:layout_below="@id/scroll_up"        android:layout_toRightOf="@id/scroll_left"        android:text="@string/down_arrow" />      <Button        android:id="@+id/scroll_right"        android:layout_width="40dip"        android:layout_height="40dip"        android:layout_centerVertical="true"        android:layout_toRightOf="@id/scroll_down"        android:text="@string/right_arrow" />    </RelativeLayout>

    <LinearLayout      android:layout_width="wrap_content"      android:layout_height="wrap_content"      android:orientation="vertical" >      <Button        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:text="@string/music" />      <Button        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:text="@string/crown" />    </LinearLayout>

<string name="music">/u265A</string><string name="crown">/u266B</string><string name="left_arrow">/u2190</string><string name="up_arrow">/u2191</string><string name="down_arrow">/u2193</string><string name="right_arrow">/u2192</string>