博客
关于我
Activity A跳转B,横竖屏切换
阅读量:103 次
发布时间:2019-02-25

本文共 2145 字,大约阅读时间需要 7 分钟。

> Activity A跳到横屏Activity B,B进行横竖屏切换,导致A重新执行OnCreate()生命周期,如何让A不重建?

在Activity A中注册文件描述中加入 android:configChanges="orientation|screenSize|keyboardHidden"  

Caution: Beginning with Android 3.2 (API level 13), the "screen size" also changes when the device switches between portrait and landscape orientation. Thus, if you want to prevent runtime restarts due to orientation change when developing for API level 13 or higher (as declared by the minSdkVersion and targetSdkVersion attributes), you must include the "screenSize" value in addition to the "orientation" value. That is, you must decalare android:configChanges="orientation|screenSize". However, if your application targets API level 12 or lower, then your activity always handles this configuration change itself (this configuration change does not restart your activity, even when running on an Android 3.2 or higher device).

竖屏Activity跳到横屏Activity引发的混乱,Activity横竖屏切换- http://blog.csdn.net/a1030260075/article/details/50560222

> 横竖屏切换代码:

setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);

@TargetApi(Build.VERSION_CODES.JELLY_BEAN_MR1)

    public void onConfigurationChanged(Configuration newConfig) {
        super.onConfigurationChanged(newConfig);
        int mCurrentOrientation = getResources().getConfiguration().orientation;
        if (mCurrentOrientation == Configuration.ORIENTATION_PORTRAIT) {
            LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(ViewGroup.LayoutParams.FILL_PARENT, ViewGroup.LayoutParams.FILL_PARENT);
            params.height = CommonUtils.getScreenWidth(PlayerActivity.this) * 9 / 16;
            rl_content.setLayoutParams(params);
        } else if (mCurrentOrientation == Configuration.ORIENTATION_LANDSCAPE) {
            LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(ViewGroup.LayoutParams.FILL_PARENT, ViewGroup.LayoutParams.FILL_PARENT);
            rl_content.setLayoutParams(params);
        }
        DisplayMetrics dm = getResources().getDisplayMetrics();
        Point point = new Point();
        getWindowManager().getDefaultDisplay().getRealSize(point);
        VideoView.setScreenSize(point.x / dm.xdpi * 0.0254f, point.y / dm.ydpi * 0.0254f);
    }

Android横竖屏切换及其对应布局加载问题- http://www.cnblogs.com/Joanna-Yan/p/4824525.html
你可能感兴趣的文章
MySQL Xtrabackup 安装、备份、恢复
查看>>
mysql [Err] 1436 - Thread stack overrun: 129464 bytes used of a 286720 byte stack, and 160000 bytes
查看>>
MySQL _ MySQL常用操作
查看>>
MySQL – 导出数据成csv
查看>>
MySQL —— 在CentOS9下安装MySQL
查看>>
MySQL —— 视图
查看>>
mysql 不区分大小写
查看>>
mysql 两列互转
查看>>
MySQL 中开启二进制日志(Binlog)
查看>>
MySQL 中文问题
查看>>
MySQL 中日志的面试题总结
查看>>
mysql 中的all,5分钟了解MySQL5.7中union all用法的黑科技
查看>>
MySQL 中的外键检查设置:SET FOREIGN_KEY_CHECKS = 1
查看>>
Mysql 中的日期时间字符串查询
查看>>
mysql 中索引的问题
查看>>
MySQL 中锁的面试题总结
查看>>
MySQL 中随机抽样:order by rand limit 的替代方案
查看>>
MySQL 为什么需要两阶段提交?
查看>>
mysql 为某个字段的值加前缀、去掉前缀
查看>>
mysql 主从
查看>>