"Android Nano Degree" Project 0-Problem Summary

1. Page layout

Reference: http://www.xuebuyuan.com/1100763.html

Never know how to start a layout, use linear layout and properties margin,padding

2. Add a Click event

①trying to add Setonclicklistener on button but it's giving error "cannot resolve symbol ' Setonclicklistener '"

I've been through a circle of data to know that I've made a stupid question.

Put your button code in the OnCreate method. It'll work.

②after that, it's giving error "cannot resolve symbol ' Onclicklistener '"

Androidstudio shortcut key Alt+enter, View.onclicklistener (), this problem resolved.

Btn2.setonclicklistener (New View.onclicklistener () {}

3. Change the title bar color

Directly on the code:

Define the style of the title bar

<resources>
<style name= "TITLE_BG" parent= "Android: Theme" >
<item name= "Android:windowtitlebackgroundstyle" > @style/titleground</item>
</style>
<style name= "Titleground" >
<item name= "Android:background" > #ff8f26 </item>
</style>
</resources>

Setting styles in Manifest

Android:theme= "@style/TITLE_BG"

Using the last piece of code, it always goes wrong. Parent= "Android:theme", the program starts as crash.

After finding another method, modify the colorprimary and Colorprimarydark values; http://www.cnblogs.com/tianzhijiexian/p/4081562.html

But the actual effect is: only colorprimary effective, and the title bar is displayed colorprimary color. No solution after.

"Android Nano Degree" Project 0-Problem Summary