欢迎您访问程序员文章站本站旨在为大家提供分享程序员计算机编程知识!
您现在的位置是: 首页  >  移动技术

Android系统添加自定义鼠标样式通过按键切换实例详解

程序员文章站 2022-05-21 21:17:18
一、app通过view修改鼠标样式 app view上修改鼠标样式比较简单,通过 hover event 获取鼠标坐标并使用如下方法修改为自定义图片: getwindow...

一、app通过view修改鼠标样式

app view上修改鼠标样式比较简单,通过 hover event 获取鼠标坐标并使用如下方法修改为自定义图片:

getwindow().getdecorview().setpointericon(pointericon.load(getresources(), r.drawable.pointer_spot_touch_icon));

imageview = (imageview) findviewbyid(r.id.image_view);
    imageview.setonhoverlistener(new view.onhoverlistener() {
      @suppresslint({"settexti18n", "resourcetype"})
      @override
      public boolean onhover(view v, motionevent event) {
        int what = event.getaction();

        textx.settext("x : " + event.getx());
        texty.settext("y : " + event.gety());

        switch(what){
          case motionevent.action_hover_enter: //鼠标进入view
            log.i(tag, "bottom action_hover_enter...");
            morgpi = getwindow().getdecorview().getpointericon();
            getwindow().getdecorview().setpointericon(pointericon.load(getresources(), r.drawable.pointer_spot_touch_icon));
            break;
          case motionevent.action_hover_move: //鼠标在view上
            log.i(tag, "bottom action_hover_move...");
            break;
          case motionevent.action_hover_exit: //鼠标离开view
            log.i(tag, "bottom action_hover_exit...");
            getwindow().getdecorview().setpointericon(morgpi);
            break;
        }
        return false;
      }
    });
  }

 

其中pointer_spot_touch_icon.xml 需要声明为 pointer-icon :

<?xml version="1.0" encoding="utf-8"?>
<pointer-icon xmlns:android="http://schemas.android.com/apk/res/android"
  android:bitmap="@drawable/pointer_red_dot_arrow"
  android:hotspotx="6dp"
  android:hotspoty="6dp" />

二、framework层添加自定义鼠标样式并通过按键切换

(1)添加自定义样式资源

系统图标资源在 frameworks/base/core/res/res/drawable-mdpi/ 目录,其中 pointer_arrow.png、pointer_arrow_large.png 是系统默认的黑色箭头,

pointer_arrow_red_dot.png、pointer_arrow_red_dot_large.png 是自己添加的红点样式图片:

Android系统添加自定义鼠标样式通过按键切换实例详解

然后在 frameworks/base/core/res/res/drawable/ 目录添加对应的xml:

pointer_arrow_red_dot_icon.xml

<?xml version="1.0" encoding="utf-8"?>
<pointer-icon xmlns:android="http://schemas.android.com/apk/res/android"
  android:bitmap="@drawable/pointer_arrow_red_dot"
  android:hotspotx="5dp"
  android:hotspoty="5dp" />

pointer_arrow_red_dot_large_icon.xml

<?xml version="1.0" encoding="utf-8"?>
<pointer-icon xmlns:android="http://schemas.android.com/apk/res/android"
  android:bitmap="@drawable/pointer_arrow_red_dot_large"
  android:hotspotx="10dp"
  android:hotspoty="10dp" />

修改 frameworks/base/core/res/res/values/styles.xml 添加资源配置,注意名字的匹配!

Android系统添加自定义鼠标样式通过按键切换实例详解

 

Android系统添加自定义鼠标样式通过按键切换实例详解

修改 frameworks/base/core/res/res/values/attrs.xml  引用资源:

Android系统添加自定义鼠标样式通过按键切换实例详解

(2)java 层获取资源

修改 frameworks/base/core/java/android/view/pointericon.java ,添加如下定义:

Android系统添加自定义鼠标样式通过按键切换实例详解

在 getsystemicontypeindex(int type) 函数中返回之前配置的资源:

Android系统添加自定义鼠标样式通过按键切换实例详解

(3)c++层添加对应的id并加载资源

修改 frameworks/base/core/jni/android_view_pointericon.h

* pointer icon styles.
 * must match the definition in android.view.pointericon.
 */
enum {
  pointer_icon_style_custom = -1,
  pointer_icon_style_null = 0,
  pointer_icon_style_arrow = 1000,
  pointer_icon_style_context_menu = 1001,
  pointer_icon_style_hand = 1002,
  pointer_icon_style_help = 1003,
  pointer_icon_style_wait = 1004,
  pointer_icon_style_cell = 1006,
  pointer_icon_style_crosshair = 1007,
  pointer_icon_style_text = 1008,
  pointer_icon_style_vertical_text = 1009,
  pointer_icon_style_alias = 1010,
  pointer_icon_style_copy = 1011,
  pointer_icon_style_no_drop = 1012,
  pointer_icon_style_all_scroll = 1013,
  pointer_icon_style_horizontal_double_arrow = 1014,
  pointer_icon_style_vertical_double_arrow = 1015,
  pointer_icon_style_top_right_double_arrow = 1016,
  pointer_icon_style_top_left_double_arrow = 1017,
  pointer_icon_style_zoom_in = 1018,
  pointer_icon_style_zoom_out = 1019,
  pointer_icon_style_grab = 1020,
  pointer_icon_style_grabbing = 1021,

  pointer_icon_style_spot_hover = 2000,
  pointer_icon_style_spot_touch = 2001,
  pointer_icon_style_spot_anchor = 2002,
  
  pointer_icon_style_reddot = 10001, //增加自定义样式的枚举定义,与上面 pointericon.java 中的变量对应
};

修改 frameworks/base/services/core/jni/com_android_server_input_inputmanagerservice.cpp ,加载到自定义枚举变量对应的图片资源:

void nativeinputmanager::loadadditionalmouseresources(std::map<int32_t, spriteicon>* outresources,
    std::map<int32_t, pointeranimation>* outanimationresources) {
  jnienv* env = jnienv();

  for (int iconid = pointer_icon_style_context_menu; iconid <= pointer_icon_style_reddot;
       ++iconid) {
    pointericon pointericon;
    loadsystemiconasspritewithpointericon(
        env, mcontextobj, iconid, &pointericon, &((*outresources)[iconid]));
    if (!pointericon.bitmapframes.empty()) {
      pointeranimation& animationdata = (*outanimationresources)[iconid];
      size_t numframes = pointericon.bitmapframes.size() + 1;
      animationdata.durationperframe =
          milliseconds_to_nanoseconds(pointericon.durationperframe);
      animationdata.animationframes.reserve(numframes);
      animationdata.animationframes.push_back(spriteicon(
          pointericon.bitmap, pointericon.hotspotx, pointericon.hotspoty));
      for (size_t i = 0; i < numframes - 1; ++i) {
       animationdata.animationframes.push_back(spriteicon(
           pointericon.bitmapframes[i], pointericon.hotspotx, pointericon.hotspoty));
      }
    }
  }
  loadsystemiconassprite(env, mcontextobj, pointer_icon_style_null,
      &((*outresources)[pointer_icon_style_null]));
}
 

(4)按键切换鼠标样式

此知识点大家可以参阅其它相关文章:android按钮美化样式的实现代码