除了在活动的 onCreate 方法中检查设备类型之外，是否有通用的方法来设置屏幕方向

Question

这是我尝试过的方法，并且有效。在 res/values 作为 bool.xml

<?xml version="1.0" encoding="utf-8"?>
<resources>
    <bool name="portrait_only">true</bool>
</resources>

在 res/values-sw600dp 和 res/values-xlarge 中：

<?xml version="1.0" encoding="utf-8"?>
<resources>
    <bool name="portrait_only">false</bool>
</resources>

在我的活动的 onCreate 方法中：

if(getResources().getBoolean(R.bool.portrait_only)){
    setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
}

除了检查每个 oncreate 方法之外，还有其他方法可以实现完全相同的结果

Answer 1

要么你为activity这样的

创建一个基础class

//extending this to all of your activities isnt really that expensive
public class BaseActivity extends Activity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        if(getResources().getBoolean(R.bool.portrait_only)){
            setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
        }
    }
}

...
OR

在您的 Application class 中注册生命周期回调

public class MyApplication extends Application {
    @Override
    public void onCreate() {
        super.onCreate();
        registerActivityLifecycleCallbacks(new ActivityLifecycleCallbacks() {
            @Override
            public void onActivityCreated(Activity activity, Bundle bundle) {
                if(getResources().getBoolean(R.bool.portrait_only)){
                   setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
                }
                Log.i(TAG , "ApplicationClass-OnActivityCreated()");
            }

            @Override
            public void onActivityStarted(Activity activity) {
                Log.i(TAG , "ApplicationClass-OnActivityStarted()");
            }

            @Override
            public void onActivityResumed(Activity activity) {
                Log.i(TAG , "ApplicationClass-OnActivityResumed()");
            }

            @Override
            public void onActivityPaused(Activity activity) {
                Log.i(TAG , "ApplicationClass-OnActivityPaused()");
            }

            @Override
            public void onActivityStopped(Activity activity) {
                Log.i(TAG , "ApplicationClass-OnActivityStopped()");
            }

            @Override
            public void onActivitySaveInstanceState(Activity activity, Bundle bundle) {
                Log.i(TAG , "ApplicationClass-OnActivitySaveInstanceState()");
            }

            @Override
            public void onActivityDestroyed(Activity activity) {
                Log.i(TAG , "ApplicationClass-OnActivityDestroyed()");
            }
        });

    }
}

但我仍然更喜欢基础 class 实现。

希望对您有所帮助:)

除了在活动的 onCreate 方法中检查设备类型之外，是否有通用的方法来设置屏幕方向

Is there a generic way to set the Screen Orientation other than checking for device type in onCreate method of your Activities

android

android-layout

android-activity