retrofit
在安卓中显示gif图片
使用WebView
<WebView
android:id="@+id/runWebView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:layout_centerVertical="true" />
runWebView.loadDataWithBaseURL(null,
"<html>
<body bgcolor='#f3f3f3'>
<div align=center>
<IMG src='file:///android_asset/run.gif'/>
</div>
</body>
</html>", "text/html", "UTF-8",null);
实现底部状态栏
使用recyclerview + gridlayoutmanager
val rc_btm_navi = findViewById<RecyclerView>(R.id.rc_btm_navi)
rc_btm_navi.layoutManager = GridLayoutManager(this,1).apply {
orientation = GridLayoutManager.HORIZONTAL
}
rc_btm_navi.adapter = navi_adapter()
adaper中获取屏幕宽度，创建view时设置view的宽度
override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): view_holder {
val view: View =
LayoutInflater.from(parent.context)
.inflate(
R.layout.item_navi,
parent,
false
)
view.layoutParams.width = getScreenWidth(activity) / navi_arr.size
return view_holder(view)
}
自定义下拉刷新(没学会)
- TRANSLUCENT 半透明
rectF类
Rect F holds four float coordinates for a rectangle . The rectangle
is represented by the coordinates of its 4 edges ( left , top , right
bottom ). These fields can be accessed directly . Use width () and
height () to retrieve the rectangle ’ s width and height . Note :
most methods do not check to see that the coordinates are sorted
correctly ( i . e . left <= right and top <= bottom ).
ViewFlipper(翻转视图)
- 就是首次安装软件后的功能介绍页面
使用
导入图片
<ViewFlipper
android:id="@+id/vflp_help"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:inAnimation="@anim/right_in"
android:outAnimation="@anim/right_out"
android:flipInterval="3000">
<include layout="@layout/page_help_one" />
<include layout="@layout/page_help_two" />
<include layout="@layout/page_help_three" />
<include layout="@layout/page_help_four" />
<!--此处为静态导入-->
</ViewFlipper>
//动态导入
for(int i = 0;i < resId.length;i++){
vflp_help.addView(getImageView(resId[i]));
}
private ImageView getImageView(int resId){
ImageView img = new ImageView(this);
img.setBackgroundResource(resId);
return img;
}
翻动
手动翻动
- 自定义一个GestureListener
- 创建一个GestureDetector
- 重写activity的onTouchEvent
private class MyGestureListener extends GestureDetector.SimpleOnGestureListener {
@Override
public boolean onFling(MotionEvent e1, MotionEvent e2, float v, float v1) {
if(e1.getX() - e2.getX() > MIN_MOVE){
vflp_help.setInAnimation(mContext,R.anim.right_in);
vflp_help.setOutAnimation(mContext, R.anim.right_out);
vflp_help.showNext();
}else if(e2.getX() - e1.getX() > MIN_MOVE){
vflp_help.setInAnimation(mContext,R.anim.left_in);
vflp_help.setOutAnimation(mContext, R.anim.left_out);
vflp_help.showPrevious();
}
return true;
}
}
@Override
public boolean onTouchEvent(MotionEvent event) {
return mDetector.onTouchEvent(event);
}
//自动翻动
vflp_help.startFlipping();
