有两种方法。

添加android:screenOrientation="portrait"在你的manifest文件 相应的活动 添加 setRequestedOrientation (ActivityInfo.SCREEN_ORIENTATION_PORTRAIT); 在onCreate()方法中添加到您的活动

类似于Graham Borland的答案……但是如果你不想的话，你似乎不需要创建Application类…只需在项目中创建一个Base Activity

public class BaseActivity extends AppCompatActivity {

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_base);
    setRequestedOrientation (ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);

}

并且在你想使用Potrait Mode的地方扩展这个类而不是AppCompatActivity

public class your_activity extends BaseActivity {}

你可以在你的manifest文件中设置这个。

android:name=".your launching activity name"
android:screenOrientation="portrait"

你也可以通过在你的类文件中写这样的代码来达到同样的目的:

setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);

是的，您既可以通过编程方式做到这一点，也可以为您的所有活动创建一个所有活动都可以扩展的AbstractActivity。

public abstract class AbstractActivity extends Activity {
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setRequestedOrientation (ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
    }
}

这个抽象活动也可以用于全局菜单。

在Manifest文件中，你想在“肖像”中使用哪些活动，你必须在活动标签中写这些代码

  android:screenOrientation="portrait" 

像这样

android:图标= " @drawable /图标” android: name = " com.zemkoapps.hd.wallpaper.AndroidGridLayoutActivity " android: screenOrientation = "肖像" > 但如果你想在横屏中使用这段代码 android: screenOrientation = "风景"

来自Android开发者指南:

"orientation" The screen orientation has changed — the user has rotated the device. Note: If your application targets API level 13 or higher (as declared by the minSdkVersion and targetSdkVersion attributes), then you should also declare the "screenSize" configuration, because it also changes when a device switches between portrait and landscape orientations. "screenSize" The current available screen size has changed. This represents a change in the currently available size, relative to the current aspect ratio, so will change when the user switches between landscape and portrait. 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). Added in API level 13.

所以，在AndroidManifest.xml文件中，我们可以放:

<activity
            android:name=".activities.role_activity.GeneralViewPagerActivity"
            android:label="@string/title_activity_general_view_pager"
            android:screenOrientation="portrait"
            android:configChanges="orientation|keyboardHidden|screenSize"
            >
        </activity>