124

我的主要活动有一些代码可以进行一些不应中断的数据库更改。我正在另一个线程中做繁重的工作，并使用我设置为不可取消的进度对话框。但是，我注意到，如果我旋转手机，它会重新启动对正在运行的进程非常不利的活动，并且我会得到强制关闭。

我想要做的是以编程方式禁用屏幕方向更改，直到我的过程完成，此时启用方向更改。

4

17 回答 17

172

正如克里斯在他的自我回答中所解释的那样，打电话给

setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_NOSENSOR);

进而

setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_SENSOR);

真的很像魅力......在真实设备上！

不要以为在模拟器上测试时它坏了，ctrl+F11 快捷键总是改变屏幕方向，而不模拟传感器移动。

编辑：这不是最好的答案。如评论中所述，此方法存在问题。真正的答案在这里。

于 2010-09-01T00:02:58.153 回答
45

没有其他答案对我来说完美，但这就是我发现的。

锁定当前方向...

if(getResources().getConfiguration().orientation == Configuration.ORIENTATION_PORTRAIT) {
    setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
} else setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);

当应再次允许更改方向时，请设置回默认值...

setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_UNSPECIFIED);
于 2010-11-05T23:37:21.577 回答
41

这是一个更完整和最新的解决方案，适用于 API 8+，适用于反向纵向和横向，并且适用于“自然”方向为横向的 Galaxy 选项卡（调用activity.setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_UNSPECIFIED)以解锁方向）：

@SuppressWarnings("deprecation")
@SuppressLint("NewApi")
public static void lockActivityOrientation(Activity activity) {
    Display display = activity.getWindowManager().getDefaultDisplay();
    int rotation = display.getRotation();
    int height;
    int width;
    if (Build.VERSION.SDK_INT < Build.VERSION_CODES.HONEYCOMB_MR2) {
        height = display.getHeight();
        width = display.getWidth();
    } else {
        Point size = new Point();
        display.getSize(size);
        height = size.y;
        width = size.x;
    }
    switch (rotation) {
    case Surface.ROTATION_90:
        if (width > height)
            activity.setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);
        else
            activity.setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_REVERSE_PORTRAIT);
        break;
    case Surface.ROTATION_180:
        if (height > width)
            activity.setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_REVERSE_PORTRAIT);
        else
            activity.setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_REVERSE_LANDSCAPE);
        break;          
    case Surface.ROTATION_270:
        if (width > height)
            activity.setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_REVERSE_LANDSCAPE);
        else
            activity.setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
        break;
    default :
        if (height > width)
            activity.setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
        else
            activity.setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);
    }
}
于 2013-05-17T00:23:34.187 回答
18

为了管理反向模式，我使用该代码来修复活动方向：

int rotation = getWindowManager().getDefaultDisplay().getRotation();

    switch(rotation) {
    case Surface.ROTATION_180:
        setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_REVERSE_PORTRAIT);
        break;
    case Surface.ROTATION_270:
        setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_REVERSE_LANDSCAPE);         
        break;
    case  Surface.ROTATION_0:
        setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
        break;
    case Surface.ROTATION_90:
        setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);
        break;
    }

并再次允许方向：

setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_UNSPECIFIED);
于 2013-11-16T11:29:37.630 回答
18

用于 setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LOCKED);锁定当前方向，无论是横向还是纵向。

用于setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_SENSOR);解锁方向。

于 2015-10-01T11:00:10.937 回答
14

我找到了答案。为此，您可以在 Activity 中setRequestedOrientation(int)使用此处指定的值之一进行调用：http: //developer.android.com/reference/android/R.attr.html#screenOrientation

在我开始我的线程之前，我调用了setRequestedOrientation(OFF)（OFF = nosensor），线程完成后我调用了setRequestedOrientation(ON)（ON = sensor）。奇迹般有效。

于 2010-08-31T17:25:11.163 回答
11

谢谢大家。我修改了 Pilot_51 的解决方案，以确保我恢复到以前的状态。我还进行了更改以支持非横向和非纵向屏幕（但尚未在此类屏幕上进行测试）。

prevOrientation = getRequestedOrientation();
if(getResources().getConfiguration().orientation == Configuration.ORIENTATION_LANDSCAPE) {
    setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);
} else if(getResources().getConfiguration().orientation == Configuration.ORIENTATION_PORTRAIT) {
    setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
} else {
    setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_NOSENSOR);
}

然后恢复它

setRequestedOrientation(prevOrientation);
于 2011-04-01T10:24:06.247 回答
9 
protected void setLockScreenOrientation(boolean lock) {
    if (Build.VERSION.SDK_INT >= 18) {
        setRequestedOrientation(lock?ActivityInfo.SCREEN_ORIENTATION_LOCKED:ActivityInfo.SCREEN_ORIENTATION_FULL_SENSOR);
        return;
    }

    if (lock) {
        switch (getWindowManager().getDefaultDisplay().getRotation()) {
            case 0: setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT); break; // value 1
            case 2: setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_REVERSE_PORTRAIT); break; // value 9
            case 1: setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE); break; // value 0
            case 3: setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_REVERSE_LANDSCAPE); break; // value 8
        }
    } else
        setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_FULL_SENSOR); // value 10
}
于 2017-01-23T18:16:16.417 回答
7

这是一个每次都有效并保持当前方向的解决方案（Activity.Info.SCREEN_ORIENTATION_PORTRAIT例如，使用设置为 0°，但用户可以将 180° 方向作为当前方向）。

// Scope: Activity

private void _lockOrientation() {
    if (super.getResources().getConfiguration().orientation == Configuration.ORIENTATION_PORTRAIT) {
        super.setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_USER_PORTRAIT);
    } else {
        super.setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_USER_LANDSCAPE);
    }
}

private void _unlockOrientation() {
    super.setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_UNSPECIFIED);
}
于 2015-01-28T02:30:26.380 回答
1

仅在设备上启用ActivityInfo.SCREEN_ORIENTATION_USER时才想旋转屏幕时使用。

于 2013-09-19T10:47:24.060 回答
1

这对我来说很完美。它解决了平板电脑/手机不同“自然方向”的问题；）

int rotation = getWindowManager().getDefaultDisplay().getRotation();

        Configuration config = getResources().getConfiguration();
        int naturalOrientation;

        if (((rotation == Surface.ROTATION_0 || rotation == Surface.ROTATION_180) &&
                config.orientation == Configuration.ORIENTATION_LANDSCAPE)
                || ((rotation == Surface.ROTATION_90 || rotation == Surface.ROTATION_270) &&
                config.orientation == Configuration.ORIENTATION_PORTRAIT)) {
            naturalOrientation = Configuration.ORIENTATION_LANDSCAPE;
        } else {
            naturalOrientation = Configuration.ORIENTATION_PORTRAIT;
        }

        // because getRotation() gives "rotation from natural orientation" of device (different on phone and tablet)
        // we need to update rotation variable if natural orienation isn't 0 (mainly tablets)
        if (naturalOrientation == Configuration.ORIENTATION_LANDSCAPE)
            rotation = ++rotation % 4;

        switch (rotation) {
            case Surface.ROTATION_0: //0
                setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
                break;
            case Surface.ROTATION_90: //1
                setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);
                break;
            case Surface.ROTATION_180: //2
                setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_REVERSE_PORTRAIT);
                break;
            case Surface.ROTATION_270: //3
                setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_REVERSE_LANDSCAPE);
                break;
        }
    } else {
        setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_UNSPECIFIED);
    }
于 2014-05-30T10:09:28.357 回答
0

我想出了一个解决方案，它取决于显示器的旋转，然后决定设备的方向。通过知道方向，我们可以锁定方向并在需要时释放它。此解决方案还可以确定设备是否处于反向横向模式。

private void lockOrientation(){
    switch (((WindowManager) getSystemService(Context.WINDOW_SERVICE)).getDefaultDisplay().getRotation()) {


        // Portrait
        case Surface.ROTATION_0:
            setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
            break;


        //Landscape     
        case Surface.ROTATION_90: 
            setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);
            break;


        // Reversed landscape
        case Surface.ROTATION_270:
            setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_REVERSE_LANDSCAPE);             
            break;
    }
}

然后稍后如果我们需要释放方向，我们可以调用这个方法：

setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_UNSPECIFIED);
于 2014-10-05T22:42:24.993 回答
0

我认为这段代码更容易阅读。

private void keepOrientation() {

    int orientation = getResources().getConfiguration().orientation;
    int rotation = getWindowManager().getDefaultDisplay().getRotation();

    switch (rotation) {
        case Surface.ROTATION_0:
            if (orientation == Configuration.ORIENTATION_PORTRAIT) {
                setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
            } else {
                setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);
            }
            break;
        case Surface.ROTATION_90:
            if (orientation == Configuration.ORIENTATION_PORTRAIT) {
                setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_REVERSE_PORTRAIT);
            } else {
                setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);
            }
            break;
        case Surface.ROTATION_180:
            if (orientation == Configuration.ORIENTATION_PORTRAIT) {
                setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_REVERSE_PORTRAIT);
            } else {
                setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_REVERSE_LANDSCAPE);
            }
            break;
        default:
            if (orientation == Configuration.ORIENTATION_PORTRAIT) {
                setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
            } else {
                setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_REVERSE_LANDSCAPE);
            }
    }
}
于 2014-10-14T14:46:47.477 回答
0

我发现需要结合现有的旋转/方向值来涵盖四种可能性；有纵向/横向值和设备的自然方向。假设当屏幕处于“自然”纵向或横向时，设备的自然方向的旋转值为 0 度。同样，当它处于横向或纵向时，将有一个 90 度的旋转值（注意它与方向相反 @ 0 度）。因此，不是 0 或 90 度的旋转值将意味着“反向”方向。好的，这里有一些代码：

public enum eScreenOrientation 
{
PORTRAIT (ActivityInfo.SCREEN_ORIENTATION_PORTRAIT),
LANDSCAPE (ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE),
PORTRAIT_REVERSE (ActivityInfo.SCREEN_ORIENTATION_REVERSE_PORTRAIT),
LANDSCAPE_REVERSE (ActivityInfo.SCREEN_ORIENTATION_REVERSE_LANDSCAPE),
UNSPECIFIED_ORIENTATION (ActivityInfo.SCREEN_ORIENTATION_UNSPECIFIED);

    public final int activityInfoValue;

    eScreenOrientation ( int orientation )
    {
        activityInfoValue = orientation;
    }
}



public eScreenOrientation currentScreenOrientation ( )
{
    final int rotation = ((WindowManager) getSystemService(Context.WINDOW_SERVICE)).getDefaultDisplay().getRotation();

    final int orientation = getResources().getConfiguration().orientation;
    switch ( orientation ) 
    {
    case Configuration.ORIENTATION_PORTRAIT:
        if ( rotation == Surface.ROTATION_0 || rotation == Surface.ROTATION_90 )
            return eScreenOrientation.PORTRAIT;
        else
            return eScreenOrientation.PORTRAIT_REVERSE;
    case Configuration.ORIENTATION_LANDSCAPE:
        if ( rotation == Surface.ROTATION_0 || rotation == Surface.ROTATION_90 )
            return eScreenOrientation.LANDSCAPE;
        else
            return eScreenOrientation.LANDSCAPE_REVERSE;
    default:
        return eScreenOrientation.UNSPECIFIED_ORIENTATION;
    }
}

public void lockScreenOrientation ( )
    throws UnsupportedDisplayException
{
    eScreenOrientation currentOrientation = currentScreenOrientation( );
    if ( currentOrientation == eScreenOrientation.UNSPECIFIED_ORIENTATION )
        throw new UnsupportedDisplayException("Unable to lock screen - unspecified orientation");
    else
        setRequestedOrientation( currentOrientation.activityInfoValue );
}

public void unlockScreenOrientation (  )
{
    setRequestedOrientation( ActivityInfo.SCREEN_ORIENTATION_UNSPECIFIED );
}
于 2014-10-28T04:41:13.520 回答
0

我不喜欢这里的大多数答案，因为在解锁时他们将其设置为未指定，而不是之前的状态。ProjectJourneyman 确实考虑到了这一点，这很棒，但我更喜欢 Roy 的锁定代码。所以，我的建议是两者的混合：

private int prevOrientation = ActivityInfo.SCREEN_ORIENTATION_UNSPECIFIED;

private void unlockOrientation() {
    setRequestedOrientation(prevOrientation);
}

@SuppressWarnings("deprecation")
@SuppressLint("NewApi")
private void lockOrientation() {
    prevOrientation = getRequestedOrientation();
    Display display = getWindowManager().getDefaultDisplay();
    int rotation = display.getRotation();
    int height;
    int width;
    if (Build.VERSION.SDK_INT < Build.VERSION_CODES.HONEYCOMB_MR2) {
        height = display.getHeight();
        width = display.getWidth();
    } else {
        Point size = new Point();
        display.getSize(size);
        height = size.y;
        width = size.x;
    }
    switch (rotation) {
        case Surface.ROTATION_90:
            if (width > height)
                setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);
            else
                setRequestedOrientation(9/* reversePortait */);
            break;
        case Surface.ROTATION_180:
            if (height > width)
                setRequestedOrientation(9/* reversePortait */);
            else
                setRequestedOrientation(8/* reverseLandscape */);
            break;
        case Surface.ROTATION_270:
            if (width > height)
                setRequestedOrientation(8/* reverseLandscape */);
            else
                setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
            break;
        default :
            if (height > width)
                setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
            else
                setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);
    }
}
于 2015-02-19T01:34:59.540 回答
0

您可以使用

public void swapOrientaionLockState(){
    try{
        if (Settings.System.getInt(mContext.getContentResolver(), Settings.System.ACCELEROMETER_ROTATION) == 1) {
            Display defaultDisplay = ((WindowManager) mContext.getSystemService(Context.WINDOW_SERVICE)).getDefaultDisplay();
            Settings.System.putInt(mContext.getContentResolver(), Settings.System.USER_ROTATION, defaultDisplay.getRotation());
            Settings.System.putInt(mContext.getContentResolver(), Settings.System.ACCELEROMETER_ROTATION, 0);
        } else {
            Settings.System.putInt(mContext.getContentResolver(), Settings.System.ACCELEROMETER_ROTATION, 1);
        }

        Settings.System.putInt(mContext.getContentResolver(), Settings.System.ACCELEROMETER_ROTATION, !orientationIsLocked() ? 1 : 0);

    } catch (Settings.SettingNotFoundException e){
        e.printStackTrace();
    }
}

public boolean orientationIsLocked(){
    if(canModifiSetting(mContext)){
        try {
            return Settings.System.getInt(mContext.getContentResolver(), Settings.System.ACCELEROMETER_ROTATION) == 0;
        } catch (Settings.SettingNotFoundException e) {
            e.printStackTrace();
        }
    }
    return false;
}

public static boolean canModifiSetting(Context context){
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
        return Settings.System.canWrite(context);
    } else {
        return true;
    }
}
于 2017-08-11T09:33:07.537 回答
-1

使用那行代码

this.setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);

在你的活动 oncreate 方法中

于 2013-09-30T10:02:01.493 回答