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 Innodb 锁机制
查看>>
MySQL InnoDB中意向锁的作用及原理探
查看>>
MySQL InnoDB事务隔离级别与锁机制深入解析
查看>>
Mysql InnoDB存储引擎 —— 数据页
查看>>
Mysql InnoDB存储引擎中的checkpoint技术
查看>>
Mysql InnoDB存储引擎中缓冲池Buffer Pool、Redo Log、Bin Log、Undo Log、Channge Buffer
查看>>
MySQL InnoDB引擎的锁机制详解
查看>>
Mysql INNODB引擎行锁的3种算法 Record Lock Next-Key Lock Grap Lock
查看>>
mysql InnoDB数据存储引擎 的B+树索引原理
查看>>
mysql innodb通过使用mvcc来实现可重复读
查看>>
mysql insert update 同时执行_MySQL进阶三板斧(三)看清“触发器 (Trigger)”的真实面目...
查看>>
mysql interval显示条件值_MySQL INTERVAL关键字可以使用哪些不同的单位值?
查看>>
Mysql join原理
查看>>
MySQL Join算法与调优白皮书(二)
查看>>
Mysql order by与limit混用陷阱
查看>>
Mysql order by与limit混用陷阱
查看>>
mysql order by多个字段排序
查看>>
MySQL Order By实现原理分析和Filesort优化
查看>>
mysql problems
查看>>
mysql replace first,MySQL中处理各种重复的一些方法
查看>>