Android 自定义对话框去除白色边框代码
16lz
2021-01-23
使用样式文件,在values 目录下新建styles.xml文件,编写如下代码: < resources >
< style name ="dialog" parent ="@android:style/Theme.Dialog" >
< item name ="android:windowFrame" > @null </ item >
< item name ="android:windowIsFloating" > true </ item >
< item name ="android:windowIsTranslucent" > false </ item >
< item name ="android:windowNoTitle" > true </ item >
< item name ="android:background" > @android:color/black </ item >
< item name ="android:windowBackground" > @null </ item >
< item name ="android:backgroundDimEnabled" > false </ item >
</ style >
</ resources >
dialog.setContentView(R.layout.test);
dialog.show();
mContext = new ContextThemeWrapper(
context,theme == 0 ? com.android. internal .R.style.Theme_Dialog:theme);
mWindowManager = (WindowManager)context.getSystemService( " window " );
Windoww = PolicyManager.makeNewWindow(mContext);
mWindow = w;
w.setCallback( this );
w.setWindowManager(mWindowManager, null , null );
w.setGravity(Gravity.CENTER);
mUiThread = Thread.currentThread();
mDismissCancelHandler = new DismissCancelHandler( this );
}
< style name ="dialog" parent ="@android:style/Theme.Dialog" >
< item name ="android:windowFrame" > @null </ item >
< item name ="android:windowIsFloating" > true </ item >
< item name ="android:windowIsTranslucent" > false </ item >
< item name ="android:windowNoTitle" > true </ item >
< item name ="android:background" > @android:color/black </ item >
< item name ="android:windowBackground" > @null </ item >
< item name ="android:backgroundDimEnabled" > false </ item >
</ style >
</ resources >
调用时,使用AlerDialog的接口类,Dialog 接口编写如下代码:
Dialogdialog = new Dialog(SetActivity. this ,R.style.dialog);dialog.setContentView(R.layout.test);
dialog.show();
下面我们查看一下Dialog的源码文件,里面的构造函数为如下:
public Dialog(Contextcontext, int theme){mContext = new ContextThemeWrapper(
context,theme == 0 ? com.android. internal .R.style.Theme_Dialog:theme);
mWindowManager = (WindowManager)context.getSystemService( " window " );
Windoww = PolicyManager.makeNewWindow(mContext);
mWindow = w;
w.setCallback( this );
w.setWindowManager(mWindowManager, null , null );
w.setGravity(Gravity.CENTER);
mUiThread = Thread.currentThread();
mDismissCancelHandler = new DismissCancelHandler( this );
}
这里面我们可以看出,Android 使用了默认的构造函数为Dialog 设置样式,如果没有为其设置样式,即默认加载事先编写好的样式文件,Dialog 一共由多个9.png的图片构成,大部分都是带有边框的9.png图片,所以就是为什么我们上边的样式文件要将其背景去除掉。这个东西搞了我好久,希望对你有帮助
前后效果对比
未设置前:
设置后:
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