Question

这是我尝试过的，它有效。在res / values中作为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，还有其他一些方法可以做到这一点，完全相同的结果

Answer 1

要么为

这样的活动创建基类

//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类注册生命周期回调

中

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()");
            }
        });

    }
}

但我仍然更喜欢基类实现。

希望有所帮助：）

除了在活动的onCreate方法中检查设备类型之外，是否存在设置屏幕方向的通用方法

1 个答案: