Android之shape與selector實現圓角
阿新 • • 發佈:2019-02-05
shape和selector是Android UI設計中經常用到的,比如我們要自定義一個圓角Button,點選Button有些效果的變化,就要用到shape和selector。可以這樣說,shape和selector在美化控制元件中的作用是至關重要的。
1.Shape
簡介
作用:XML中定義的幾何形狀
位置:res/drawable/檔案的名稱.xml
使用的方法:
Java程式碼中:R.drawable.檔案的名稱
XML中:android:background="@drawable/檔案的名稱"
屬性:
<shape> android:shape=["rectangle" | "oval" | "line" | "ring"] 其中rectagle矩形,oval橢圓,line水平直線,ring環形 <shape>中子節點的常用屬性: <gradient> 漸變 android:startColor 起始顏色 android:endColor 結束顏色 android:angle 漸變角度,0從上到下,90表示從左到右,數值為45的整數倍預設為0; android:type 漸變的樣式 liner線性漸變 radial環形漸變 sweep <solid > 填充 android:color 填充的顏色 <stroke > 描邊 android:width 描邊的寬度 android:color 描邊的顏色 android:dashWidth 表示'-'橫線的寬度 android:dashGap 表示'-'橫線之間的距離 <corners > 圓角 android:radius 圓角的半徑 值越大角越圓 android:topRightRadius 右上圓角半徑 android:bottomLeftRadius 右下圓角角半徑 android:topLeftRadius 左上圓角半徑 android:bottomRightRadius 左下圓角半徑
2.Selector
簡介
位置:res/drawable/檔案的名稱.xml
使用的方法:
Java程式碼中:R.drawable.檔案的名稱
XML中:android:background="@drawable/檔案的名稱"
selector.xml
<?xml version="1.0" encoding="utf-8"?> <selector xmlns:android="http://schemas.android.com/apk/res/android"> <item android:state_selected="true"> <shape> <gradient android:angle="270" android:endColor="#99BD4C" android:startColor="#A5D245" /> <size android:height="60dp" android:width="320dp" /> <corners android:radius="8dp" /> </shape> </item> <item android:state_pressed="true"> <shape> <gradient android:angle="270" android:endColor="#99BD4C" android:startColor="#A5D245"/> <size android:height="60dp" android:width="320dp" /> <corners android:radius="8dp" /> </shape> </item> <item> <shape> <gradient android:angle="270" android:endColor="#A8C3B0" android:startColor="#C6CFCE"/> <size android:height="60dp" android:width="320dp" /> <corners android:radius="8dp" /> </shape> </item> </selector>
list_item.xml
<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="horizontal" android:layout_width="fill_parent" android:layout_height="wrap_content" android:background="@drawable/selector" > <ImageView android:id="@+id/img" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_gravity="center_vertical" android:layout_marginLeft="20dp" /> <TextView android:text="data" android:id="@+id/title" android:layout_width="fill_parent" android:layout_height="wrap_content" android:gravity="center_vertical" android:layout_marginLeft="20dp" android:layout_marginTop="20dp" android:textSize="14sp" android:textStyle="bold" android:textColor="@color/black" > </TextView> </LinearLayout>
main.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:background="#253853"
>
<ListView
android:id="@+id/list"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:cacheColorHint="#00000000"
android:divider="#2A4562"
android:dividerHeight="3px"
android:listSelector="#264365"
android:drawSelectorOnTop="false"
>
</ListView>
</LinearLayout>
colors.xml
<?xml version="1.0" encoding="utf-8"?>
<resources>
<color name="white">#FFFFFFFF</color>
<color name="transparency">#00000000</color>
<color name="title_bg">#1C86EE</color>
<color name="end_color">#A0cfef83</color>
<color name="black">#464646</color>
</resources>
MainActivity
package com.lingdududu.customlist;
import java.util.ArrayList;
import java.util.HashMap;
import xb.customlist.R;
import android.R.array;
import android.app.Activity;
import android.os.Bundle;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import android.widget.SimpleAdapter;
public class MainActivity extends Activity {
ListView list;
String data[] = new String[]{
"China","UK","USA","Japan","German","Canada","ET","Narotu"
};
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
list =(ListView) findViewById(R.id.list);
SimpleAdapter adapter = new SimpleAdapter(this, getData(), R.layout.list_item,
new String[]{"title","img"}, new int[]{R.id.title,R.id.img});
list.setAdapter(adapter);
}
private ArrayList<HashMap<String, Object>> getData() {
ArrayList<HashMap<String, Object>> dlist = new ArrayList<HashMap<String,Object>>();
for(int i =0;i<data.length;i++){
HashMap<String, Object>map = new HashMap<String, Object>();
map.put("title", data[i]);
map.put("img", R.drawable.item_left2);
dlist.add(map);
}
return dlist;
}
}
效果圖:
轉載:http://blog.csdn.net/way_ping_li/article/details/8099092 效果圖: