設定透明效果 大概有三種
1、用android系統的透明效果
Java代碼
android:background="@android:color/transparent"
例如 設定按鈕
Java代碼
<Button android:background="@android:color/transparent"
android:text="@+id/Button01"
android:id="@+id/Button01"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textColor="#ffffff" />
2、用ARGB來控制 Java代碼
半透明<Button android:background="#e0000000" />
透明<Button android:background="#00000000" /> 3、設定alpha Java代碼
View v = findViewById(R.id.content);//找到你要設透明背景的layout 的id
v.getBackground().setAlpha(100);//0~255透明度值
android 窗體透明的,黑暗度等的設定技巧 設定透明度(這是窗體本身的透明度,非背景)
lp.alpha=
1
.5f;
31
<code bitstream="" vera="" sans="" mono',="" 'courier="" new',="" courier,="" monospace="" !important;="" float:="" none="" border-top-width:="" 0px="" border-bottom-width:="" height:="" auto="" color:="" rgb(0,0,0)="" font-size:="" 10pt="" vertical-align:="" baseline="" border-left-width:="" top:="" right:="" font-weight:="" normal="" padding-top:="" left:="" background-origin:="" initial;="" background-clip:="" initial"="" class="plain" style="margin: 0px; padding: 0px !important; border-radius: 0px !important; border: 0px !important; bottom: auto !important; float: none !important; left: auto !important; line-height: 1.1em !important; outline: 0px !important; overflow: visible !important; position: static !important; right: auto !important; top: auto !important; vertical-align: baseline !important; width: auto !important; box-sizing: content-box !important; font-family: Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace !important; font-size: 1em !important; min-height: inherit !important; background: none !important;">WindowManager.LayoutParams.FLAG_BLUR_BEHIND);
以上設定對dialog對話框同樣有效 Activity的透明、半透明效果的設定transparent res/values/styles.xml
1 2 3 4 5 6 7 8 9 10 11 12 | <resources> <style name="Transparent"> <item name="android:windowBackground"> @color/transparent_background </item> <item name="android:windowNoTitle">true </item> <item name="android:windowIsTranslucent">true </item> <item name="android:windowAnimationStyle"> @+android:style/Animation.Translucent </item> </style> </resources> |
res/values/color.xml
1 2 3 4 5 6 7 | <?xml version="1.0" encoding="utf-8"?> <resources> <color name="transparent_background">#50000000 </color> </resources> //注意: //color.xml的#5000000前兩位是透明的效果參數從00--99(透明--不怎麼透明), //後6位是顔色的設定 |
manifest.xml
1 2 3 4 | <activity android:name=".TransparentActivity" android:theme="@style/Transparent"> </activity> |
java代碼
1 2 3 4 5 | public void onCreate (Bundle savedInstanceState ) { super. onCreate (savedInstanceState ) ; setTheme (R. style. Transparent ) ; setContentView (R. layout. transparent ) ; } |
配置結束。