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密码忘记,怎么办?
查看>>
mysql对同一张表进行查询和赋值更新
查看>>
mysql导入数据库出现:Incorrect string value: '\xE7\x82\xB9\xE9\x92\x9F' for column 'chinese' at row 1...
查看>>
mysql导入(ibd文件)
查看>>
Mysql工作笔记006---Mysql服务器磁盘爆满了_java.sql.SQLException: Error writing file ‘tmp/MYfXO41p‘
查看>>
MySQL工具1:mysqladmin
查看>>
mysql常用命令
查看>>
MySQL常用命令
查看>>
mysql常用命令
查看>>
MySQL常用指令集
查看>>
mysql常用操作
查看>>
MySQL常用日期格式转换函数、字符串函数、聚合函数详
查看>>
MySQL常见架构的应用
查看>>
MySQL常见的三种存储引擎(InnoDB、MyISAM、MEMORY)
查看>>
MySQL常见约束条件
查看>>
MySQL常见错误
查看>>
MySQL常见错误分析与解决方法总结
查看>>
mysql并发死锁案例
查看>>
MySQL底层概述—1.InnoDB内存结构
查看>>
MySQL底层概述—2.InnoDB磁盘结构
查看>>