关于自适应屏幕方向和大小的一些经验

以你之姓@ 2022-05-15 00:39 500阅读 0赞

###   刚开始，我开发时选取的模拟器是WVGA854，其分辨率为854\*480。我开发完毕后装在800\*480的手机上时感觉很OK，但是装到480\*320、以及320\*240分辨率上的手机时，很多界面都变形了，这时我感受到了app自适应的重要性。           自适应主要会遇到两个大问题：横屏和竖屏的切换，以及分辨率大小不同。               一.当横屏切换成竖屏时，解决的办法：        在res目录下建立layout-port和layout-land两个目录，里面分别放置竖屏和横屏两种布局文件，当手机屏幕方向变化的时android系统会自动调用相应的布局文件。        当然还有办法就是不切换。要么都是横屏或者要么都是竖屏。可以在AndroidManifest.xml文件中设置，比如某个Activity设置为android:screenOrientation="portrait" 这样就一直保持竖屏，如果设置为   android:screenOrientation="landscape" 这样就一直保持横屏。           二.当遇到分辨率不同大小时，我们也会遇到三个问题：图片大小、布局、横屏和竖屏的切换。           图片问题好解决，到android2.0以后的api中，我们会发现原先的drawable文件夹变成了3个分别是drawable-hdpi、drawable-mdpi、drawable-ldpi。        第一个文件夹放高分辨率手机的图片，比如：854\*480、800\*480        第二个文件夹放中分辨率手机的图片，比如：480\*320        第三个文件夹放低分辨率手机的图片，比如：320\*240           关于布局和横屏切换成竖屏类似，也只需要在res目录下创建不同的layout文件夹，比如layout-480x320,layout-800x480，系统会根据屏幕的大小自己选择合适的layout来使用。              当横屏切换成竖屏时，就会遇到一个问题，我该怎么创建layout文件夹？   下图是我的工程里所有的layout文件夹：      [![转载关于自适应屏幕方向和大小的一些经验][5033827fh95034b310e8d_690]][5033827fh95034b310e8d_690 1]         layout 是适配高分辨率竖屏的布局文件夹   layout-land 是适配高分辨率横屏的布局文件夹   layout-land-320x240 是适配低分辨率横屏的布局文件夹   layout-land-480x320 是适配中分辨率横屏的布局文件夹   layout-port-320x240 是适配低分辨率竖屏的布局文件夹   layout-port-480x320 是适配中分辨率竖屏的布局文件夹 ###

###         这样布局文件的适配就做完了。        我个人觉得先按照高分辨率的模拟器开发效果比较好，然后去做各个不同分辨率的适配。有时候我们布局时，低分辨率的布局可能需要修改下。           最后，还有一个问题如果是在java程序中写死的布局怎么办？        这个就很恼火了，需要判断屏幕的大小了，获取屏幕大小的代码如下： ###

[?][Link 1]

下面的代码片段是我自己在程序中写死布局使用的，仅供参考：

[?][Link 1]

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      <code style="border:0px!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:2em!important; margin:0px!important; outline:rgb(0,0,0)!important; overflow:visible!important; padding:0px!important; position:static!important; right:auto!important; top:auto!important; vertical-align:baseline!important; width:auto!important; font-family:'Courier New',Consolas,'Bitstream Vera Sans Mono',Courier,monospace!important; min-height:inherit!important; white-space:pre-wrap; color:rgb(0,0,255)!important">new</code>&nbsp; 
      <code style="border:0px!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:2em!important; margin:0px!important; outline:rgb(0,0,0)!important; overflow:visible!important; padding:0px!important; position:static!important; right:auto!important; top:auto!important; vertical-align:baseline!important; width:auto!important; font-family:'Courier New',Consolas,'Bitstream Vera Sans Mono',Courier,monospace!important; min-height:inherit!important; white-space:pre-wrap">LayoutParams(</code> 
      <code style="border:0px!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:2em!important; margin:0px!important; outline:rgb(0,0,0)!important; overflow:visible!important; padding:0px!important; position:static!important; right:auto!important; top:auto!important; vertical-align:baseline!important; width:auto!important; font-family:'Courier New',Consolas,'Bitstream Vera Sans Mono',Courier,monospace!important; min-height:inherit!important; white-space:pre-wrap; color:rgb(0,153,0)!important">80</code> 
      <code style="border:0px!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:2em!important; margin:0px!important; outline:rgb(0,0,0)!important; overflow:visible!important; padding:0px!important; position:static!important; right:auto!important; top:auto!important; vertical-align:baseline!important; width:auto!important; font-family:'Courier New',Consolas,'Bitstream Vera Sans Mono',Courier,monospace!important; min-height:inherit!important; white-space:pre-wrap">,&nbsp;&nbsp; </code> 
     </div> 
     <div style="background-color:rgb(248,248,248)!important; border:0px!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:2em!important; margin:0px!important; outline:rgb(0,0,0)!important; overflow:visible!important; padding:0px 5px!important; position:static!important; right:auto!important; top:auto!important; vertical-align:baseline!important; width:auto!important; min-height:inherit!important"> 
      <code style="border:0px!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:2em!important; margin:0px!important; outline:rgb(0,0,0)!important; overflow:visible!important; padding:0px!important; position:static!important; right:auto!important; top:auto!important; vertical-align:baseline!important; width:auto!important; font-family:'Courier New',Consolas,'Bitstream Vera Sans Mono',Courier,monospace!important; min-height:inherit!important; white-space:pre-wrap">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</code> 
      <code style="border:0px!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:2em!important; margin:0px!important; outline:rgb(0,0,0)!important; overflow:visible!important; padding:0px!important; position:static!important; right:auto!important; top:auto!important; vertical-align:baseline!important; width:auto!important; font-family:'Courier New',Consolas,'Bitstream Vera Sans Mono',Courier,monospace!important; min-height:inherit!important; white-space:pre-wrap">android.view.ViewGroup.LayoutParams.WRAP_CONTENT));&nbsp;&nbsp; </code> 
     </div> 
     <div style="border:0px!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:2em!important; margin:0px!important; outline:rgb(0,0,0)!important; overflow:visible!important; padding:0px 5px!important; position:static!important; right:auto!important; top:auto!important; vertical-align:baseline!important; width:auto!important; min-height:inherit!important"> 
      <code style="border:0px!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:2em!important; margin:0px!important; outline:rgb(0,0,0)!important; overflow:visible!important; padding:0px!important; position:static!important; right:auto!important; top:auto!important; vertical-align:baseline!important; width:auto!important; font-family:'Courier New',Consolas,'Bitstream Vera Sans Mono',Courier,monospace!important; min-height:inherit!important; white-space:pre-wrap">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</code> 
      <code style="border:0px!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:2em!important; margin:0px!important; outline:rgb(0,0,0)!important; overflow:visible!important; padding:0px!important; position:static!important; right:auto!important; top:auto!important; vertical-align:baseline!important; width:auto!important; font-family:'Courier New',Consolas,'Bitstream Vera Sans Mono',Courier,monospace!important; min-height:inherit!important; white-space:pre-wrap; color:rgb(0,0,255)!important">else</code>&nbsp; 
      <code style="border:0px!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:2em!important; margin:0px!important; outline:rgb(0,0,0)!important; overflow:visible!important; padding:0px!important; position:static!important; right:auto!important; top:auto!important; vertical-align:baseline!important; width:auto!important; font-family:'Courier New',Consolas,'Bitstream Vera Sans Mono',Courier,monospace!important; min-height:inherit!important; white-space:pre-wrap; color:rgb(0,0,255)!important">if</code>&nbsp; 
      <code style="border:0px!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:2em!important; margin:0px!important; outline:rgb(0,0,0)!important; overflow:visible!important; padding:0px!important; position:static!important; right:auto!important; top:auto!important; vertical-align:baseline!important; width:auto!important; font-family:'Courier New',Consolas,'Bitstream Vera Sans Mono',Courier,monospace!important; min-height:inherit!important; white-space:pre-wrap">(screenWidth &gt;</code> 
      <code style="border:0px!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:2em!important; margin:0px!important; outline:rgb(0,0,0)!important; overflow:visible!important; padding:0px!important; position:static!important; right:auto!important; top:auto!important; vertical-align:baseline!important; width:auto!important; font-family:'Courier New',Consolas,'Bitstream Vera Sans Mono',Courier,monospace!important; min-height:inherit!important; white-space:pre-wrap; color:rgb(0,153,0)!important">480</code>&nbsp; 
      <code style="border:0px!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:2em!important; margin:0px!important; outline:rgb(0,0,0)!important; overflow:visible!important; padding:0px!important; position:static!important; right:auto!important; top:auto!important; vertical-align:baseline!important; width:auto!important; font-family:'Courier New',Consolas,'Bitstream Vera Sans Mono',Courier,monospace!important; min-height:inherit!important; white-space:pre-wrap">&amp;&amp; screenHeight == </code> 
      <code style="border:0px!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:2em!important; margin:0px!important; outline:rgb(0,0,0)!important; overflow:visible!important; padding:0px!important; position:static!important; right:auto!important; top:auto!important; vertical-align:baseline!important; width:auto!important; font-family:'Courier New',Consolas,'Bitstream Vera Sans Mono',Courier,monospace!important; min-height:inherit!important; white-space:pre-wrap; color:rgb(0,153,0)!important">480</code> 
      <code style="border:0px!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:2em!important; margin:0px!important; outline:rgb(0,0,0)!important; overflow:visible!important; padding:0px!important; position:static!important; right:auto!important; top:auto!important; vertical-align:baseline!important; width:auto!important; font-family:'Courier New',Consolas,'Bitstream Vera Sans Mono',Courier,monospace!important; min-height:inherit!important; white-space:pre-wrap">)&nbsp;&nbsp;&nbsp; </code> 
     </div> 
     <div style="background-color:rgb(248,248,248)!important; border:0px!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:2em!important; margin:0px!important; outline:rgb(0,0,0)!important; overflow:visible!important; padding:0px 5px!important; position:static!important; right:auto!important; top:auto!important; vertical-align:baseline!important; width:auto!important; min-height:inherit!important"> 
      <code style="border:0px!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:2em!important; margin:0px!important; outline:rgb(0,0,0)!important; overflow:visible!important; padding:0px!important; position:static!important; right:auto!important; top:auto!important; vertical-align:baseline!important; width:auto!important; font-family:'Courier New',Consolas,'Bitstream Vera Sans Mono',Courier,monospace!important; min-height:inherit!important; white-space:pre-wrap">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</code> 
      <code style="border:0px!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:2em!important; margin:0px!important; outline:rgb(0,0,0)!important; overflow:visible!important; padding:0px!important; position:static!important; right:auto!important; top:auto!important; vertical-align:baseline!important; width:auto!important; font-family:'Courier New',Consolas,'Bitstream Vera Sans Mono',Courier,monospace!important; min-height:inherit!important; white-space:pre-wrap">cancelBtn.setLayoutParams(</code> 
      <code style="border:0px!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:2em!important; margin:0px!important; outline:rgb(0,0,0)!important; overflow:visible!important; padding:0px!important; position:static!important; right:auto!important; top:auto!important; vertical-align:baseline!important; width:auto!important; font-family:'Courier New',Consolas,'Bitstream Vera Sans Mono',Courier,monospace!important; min-height:inherit!important; white-space:pre-wrap; color:rgb(0,0,255)!important">new</code>&nbsp; 
      <code style="border:0px!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:2em!important; margin:0px!important; outline:rgb(0,0,0)!important; overflow:visible!important; padding:0px!important; position:static!important; right:auto!important; top:auto!important; vertical-align:baseline!important; width:auto!important; font-family:'Courier New',Consolas,'Bitstream Vera Sans Mono',Courier,monospace!important; min-height:inherit!important; white-space:pre-wrap">LayoutParams(</code> 
      <code style="border:0px!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:2em!important; margin:0px!important; outline:rgb(0,0,0)!important; overflow:visible!important; padding:0px!important; position:static!important; right:auto!important; top:auto!important; vertical-align:baseline!important; width:auto!important; font-family:'Courier New',Consolas,'Bitstream Vera Sans Mono',Courier,monospace!important; min-height:inherit!important; white-space:pre-wrap; color:rgb(0,153,0)!important">160</code> 
      <code style="border:0px!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:2em!important; margin:0px!important; outline:rgb(0,0,0)!important; overflow:visible!important; padding:0px!important; position:static!important; right:auto!important; top:auto!important; vertical-align:baseline!important; width:auto!important; font-family:'Courier New',Consolas,'Bitstream Vera Sans Mono',Courier,monospace!important; min-height:inherit!important; white-space:pre-wrap">,&nbsp;&nbsp; </code> 
     </div> 
     <div style="border:0px!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:2em!important; margin:0px!important; outline:rgb(0,0,0)!important; overflow:visible!important; padding:0px 5px!important; position:static!important; right:auto!important; top:auto!important; vertical-align:baseline!important; width:auto!important; min-height:inherit!important"> 
      <code style="border:0px!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:2em!important; margin:0px!important; outline:rgb(0,0,0)!important; overflow:visible!important; padding:0px!important; position:static!important; right:auto!important; top:auto!important; vertical-align:baseline!important; width:auto!important; font-family:'Courier New',Consolas,'Bitstream Vera Sans Mono',Courier,monospace!important; min-height:inherit!important; white-space:pre-wrap">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</code> 
      <code style="border:0px!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:2em!important; margin:0px!important; outline:rgb(0,0,0)!important; overflow:visible!important; padding:0px!important; position:static!important; right:auto!important; top:auto!important; vertical-align:baseline!important; width:auto!important; font-family:'Courier New',Consolas,'Bitstream Vera Sans Mono',Courier,monospace!important; min-height:inherit!important; white-space:pre-wrap">android.view.ViewGroup.LayoutParams.WRAP_CONTENT));&nbsp;&nbsp; </code> 
     </div> 
     <div style="background-color:rgb(248,248,248)!important; border:0px!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:2em!important; margin:0px!important; outline:rgb(0,0,0)!important; overflow:visible!important; padding:0px 5px!important; position:static!important; right:auto!important; top:auto!important; vertical-align:baseline!important; width:auto!important; min-height:inherit!important"> 
      <code style="border:0px!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:2em!important; margin:0px!important; outline:rgb(0,0,0)!important; overflow:visible!important; padding:0px!important; position:static!important; right:auto!important; top:auto!important; vertical-align:baseline!important; width:auto!important; font-family:'Courier New',Consolas,'Bitstream Vera Sans Mono',Courier,monospace!important; min-height:inherit!important; white-space:pre-wrap">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</code> 
      <code style="border:0px!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:2em!important; margin:0px!important; outline:rgb(0,0,0)!important; overflow:visible!important; padding:0px!important; position:static!important; right:auto!important; top:auto!important; vertical-align:baseline!important; width:auto!important; font-family:'Courier New',Consolas,'Bitstream Vera Sans Mono',Courier,monospace!important; min-height:inherit!important; white-space:pre-wrap; color:rgb(0,0,255)!important">else</code>&nbsp; 
     </div> 
     <div style="border:0px!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:2em!important; margin:0px!important; outline:rgb(0,0,0)!important; overflow:visible!important; padding:0px 5px!important; position:static!important; right:auto!important; top:auto!important; vertical-align:baseline!important; width:auto!important; min-height:inherit!important"> 
      <code style="border:0px!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:2em!important; margin:0px!important; outline:rgb(0,0,0)!important; overflow:visible!important; padding:0px!important; position:static!important; right:auto!important; top:auto!important; vertical-align:baseline!important; width:auto!important; font-family:'Courier New',Consolas,'Bitstream Vera Sans Mono',Courier,monospace!important; min-height:inherit!important; white-space:pre-wrap">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</code> 
      <code style="border:0px!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:2em!important; margin:0px!important; outline:rgb(0,0,0)!important; overflow:visible!important; padding:0px!important; position:static!important; right:auto!important; top:auto!important; vertical-align:baseline!important; width:auto!important; font-family:'Courier New',Consolas,'Bitstream Vera Sans Mono',Courier,monospace!important; min-height:inherit!important; white-space:pre-wrap">cancelBtn.setLayoutParams(</code> 
      <code style="border:0px!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:2em!important; margin:0px!important; outline:rgb(0,0,0)!important; overflow:visible!important; padding:0px!important; position:static!important; right:auto!important; top:auto!important; vertical-align:baseline!important; width:auto!important; font-family:'Courier New',Consolas,'Bitstream Vera Sans Mono',Courier,monospace!important; min-height:inherit!important; white-space:pre-wrap; color:rgb(0,0,255)!important">new</code>&nbsp; 
      <code style="border:0px!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:2em!important; margin:0px!important; outline:rgb(0,0,0)!important; overflow:visible!important; padding:0px!important; position:static!important; right:auto!important; top:auto!important; vertical-align:baseline!important; width:auto!important; font-family:'Courier New',Consolas,'Bitstream Vera Sans Mono',Courier,monospace!important; min-height:inherit!important; white-space:pre-wrap">LayoutParams(</code> 
      <code style="border:0px!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:2em!important; margin:0px!important; outline:rgb(0,0,0)!important; overflow:visible!important; padding:0px!important; position:static!important; right:auto!important; top:auto!important; vertical-align:baseline!important; width:auto!important; font-family:'Courier New',Consolas,'Bitstream Vera Sans Mono',Courier,monospace!important; min-height:inherit!important; white-space:pre-wrap; color:rgb(0,153,0)!important">120</code> 
      <code style="border:0px!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:2em!important; margin:0px!important; outline:rgb(0,0,0)!important; overflow:visible!important; padding:0px!important; position:static!important; right:auto!important; top:auto!important; vertical-align:baseline!important; width:auto!important; font-family:'Courier New',Consolas,'Bitstream Vera Sans Mono',Courier,monospace!important; min-height:inherit!important; white-space:pre-wrap">,&nbsp;&nbsp; </code> 
     </div> 
     <div style="background-color:rgb(248,248,248)!important; border:0px!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:2em!important; margin:0px!important; outline:rgb(0,0,0)!important; overflow:visible!important; padding:0px 5px!important; position:static!important; right:auto!important; top:auto!important; vertical-align:baseline!important; width:auto!important; min-height:inherit!important"> 
      <code style="border:0px!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:2em!important; margin:0px!important; outline:rgb(0,0,0)!important; overflow:visible!important; padding:0px!important; position:static!important; right:auto!important; top:auto!important; vertical-align:baseline!important; width:auto!important; font-family:'Courier New',Consolas,'Bitstream Vera Sans Mono',Courier,monospace!important; min-height:inherit!important; white-space:pre-wrap">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</code> 
      <code style="border:0px!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:2em!important; margin:0px!important; outline:rgb(0,0,0)!important; overflow:visible!important; padding:0px!important; position:static!important; right:auto!important; top:auto!important; vertical-align:baseline!important; width:auto!important; font-family:'Courier New',Consolas,'Bitstream Vera Sans Mono',Courier,monospace!important; min-height:inherit!important; white-space:pre-wrap">android.view.ViewGroup.LayoutParams.WRAP_CONTENT));</code> 
     </div> 
    </div> </td> 
  </tr> 
 </tbody> 
</table>

[5033827fh95034b310e8d_690]: http://s14.sinaimg.cn/middle/5033827fh95034b310e8d&690
[5033827fh95034b310e8d_690 1]: /images/20220515/397bafcc8679403bb3e78cb7694b36d5.png
[Link 1]: http://www.cnblogs.com/wangjianhui/articles/2058049.html#