禁用屏幕旋转在Android上运行 [英] Disable screen rotation at runtime on Android

问题描述

public class testScreenRotation extends Activity {
/** Called when the activity is first created. */

private int mRuntimeOrientation;
   private boolean mDisableScreenRotation=true;

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    mRuntimeOrientation = this.getScreenOrientation();
    setContentView(R.layout.main);


}
protected int getScreenOrientation() {
/*
    Display display = getWindowManager().getDefaultDisplay();
    int orientation = display.getOrientation();

    if (orientation == Configuration.ORIENTATION_UNDEFINED) {
       orientation = getResources().getConfiguration().orientation;

       if (orientation == Configuration.ORIENTATION_UNDEFINED) {
          if (display.getWidth() == display.getHeight())
             orientation = Configuration.ORIENTATION_SQUARE;
          else if(display.getWidth() < display.getHeight())

             orientation = Configuration.ORIENTATION_PORTRAIT;
          else
             orientation = Configuration.ORIENTATION_LANDSCAPE;
          }
       }


    return orientation;
  */
    return Configuration.ORIENTATION_PORTRAIT;
 }
@Override
public void onConfigurationChanged(Configuration newConfig) {
    // TODO Auto-generated method stub
       if (mDisableScreenRotation) {
             super.onConfigurationChanged(newConfig);
             this.setRequestedOrientation(mRuntimeOrientation);
          } else {
             mRuntimeOrientation = this.getScreenOrientation();
             super.onConfigurationChanged(newConfig);
          }
       }

}

我的应用程序如上面，然后加入Android：在xml.when configChanges =方向我的应用程序开始我的屏幕是人像，我preSS CTRL + F12，屏幕也roate，屏幕为横向，第二我preSS CTRL + F12，屏幕也roate，屏幕人像，然后我preSS CTRL + F12，屏幕保持肖像。所以我再次preSS，画面保持肖像。我的问题是，为什么我的屏幕跟不上肖像时，应用程序启动。

my app as above ,and add android:configChanges="orientation" in the xml.when my app start my screen is PORTRAIT,i press ctrl+F12,the screen also roate,the screen is LANDSCAPE,second i press ctrl+F12,the screen also roate,the screen is PORTRAIT,then i press ctrl+F12,the screen keep PORTRAIT. so i press again,the screen keep PORTRAIT. my question is that why my screen not keep PORTRAIT when the app start.

编辑：我想用code来控制屏幕roate，如果我能做到这一点。

i want to use code to control the screen roate, if i can do this?

推荐答案

如果你试图让你的应用程序是在人像模式中的所有时间，可以将此行的元素在清单

If you are trying to get your application to be in Portrait-mode all the time, you can this line to the element in the manifest

android:screenOrientation="portrait"

在每个活动添加这条线在AndroidManifest.xml文件。

Add This line in each activity in the AndroidManifest.xml file.

这篇关于禁用屏幕旋转在Android上运行的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！