Android进阶用法的相关内容

我的Android进阶之旅------>android:drawableLeft的用法

有时候想在EditText左边放一个图片，如图所示：就可以在xml布局文件中的EditText定义代码中，添加入下面的代码，即可实现： android:drawableLeft="@drawable/login_user" 在TextView中有这么一系列属性，可以在文字的上下左右开始结束处画图片...

我的Android进阶之旅------>Android中android:windowSoftInputMode的用法

面试题：如何在显示某个Activity时立即弹出软键盘？答案：在AndroidManifest.xml文件中设置<activity>标签的android:windowSoftInputMode属性可以在显示Activity时立即弹出当前输入法的软键盘(不管是否有获得焦点的空...

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我的Android进阶之旅------>Android嵌入图像InsetDrawable的用法

面试题：为一个充满整个屏幕的LinearLayout布局指定背景图，是否可以让背景图不充满屏幕？请用代码描述实现过程。解决此题，可以使用嵌入(Inset)图像资源来指定图像，然后像使用普通图像资源一样使用嵌入图像资源。语法如下： <?xml version="1.0" encoding="...

我的Android进阶之旅------>Android <requestFocus />标签的用法

布局资源文件的根节点可以使用容器控件（如LinearLayout、FrameLayout等），也可以使用非容器控件(如：EditText、TextView等)。对于非容器控件，只能在非容器控件标签中放<requestFocus />标签，表示将当前控件设为焦点。如下代码： <Lin...

我的Android进阶之旅------>Android之选项卡(TabHost)的功能和用法

简介下面通过一个实例来学习TabHost,在此对上一篇 Android之拖动条(SeekBar和RatingBar)的功能和用法使用的项目进行优化，使用TabHost使界面看起来更加友好。 step1:新建一个项目MyTabHost step...

我的Android进阶之旅------>Android之拖动条(SeekBar和RatingBar)的功能和用法

简介下面通过一个使用拖动滑块改变图片透明度的实例来学习SeekBar和RatingBar step1:新建一个项目MySeekBar step2:编写应用的UI界面 a. /layout/seekbar.xml <?xml versio...

我的Android进阶之旅------>Android之进度条(ProgressBar)的功能和用法

一、简介进度条是UI界面中一种非常实用的组件，退出用于向用户显示某个比较耗时间的操作完成的百分比。因此进度条可以动态的显示进度，避免长时间地执行某个耗时操作，让用户感觉程序失去了响应，从而更好的提高用户界面的友好性。 ...

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更新时间 2023-09-29 03:27:47

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