添加菜单
java文件
// Menu菜单添加
public boolean onCreateOptionsMenu(Menu menu) {
menu.add(0, 0, 0, "关于").setIcon(R.drawable.icon);
menu.add(0, 1, 1, "横竖切换");
menu.add(0, 2, 2, "退出");
return super.onCreateOptionsMenu(menu);
}
// Menu菜单功能添加
public boolean onOptionsItemSelected(MenuItem item) {
super.onOptionsItemSelected(item);
switch (item.getItemId()) {
case 0:
Toast.makeText(getApplicationContext(), "2011 By 某某某", Toast.LENGTH_LONG).show();
break;
case 1:
// 如果是竖排,则改为横排
if (getRequestedOrientation() == ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE) {
setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
}
// 如果是横排,则改为竖排
else if (getRequestedOrientation() == ActivityInfo.SCREEN_ORIENTATION_PORTRAIT) {
setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);
}
break;
case 2:
// 程序切换
this.finish();
break;
}
return true;
}
AndroidManifest.xml
设置初始为竖屏
android:screenOrientation="portrait"
设置切换屏幕后画面数据保留(这句很关键)
android:configChanges="orientation|keyboardHidden"
完整xml
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.android.test" android:versionCode="1"
android:versionName="1.0">
<application android:label="@string/app_name" android:icon="@drawable/icon">
<activity android:label="@string/app_name" android:name="HelloWorld"
android:screenOrientation="portrait" android:configChanges="orientation|keyboardHidden">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
<uses-sdk android:minSdkVersion="4" />
</manifest>