android 7.0 关闭系统自动旋转

来源：互联网发布：重庆大学软件工程学院编辑：程序博客网时间：2024/05/22 13:35

实现效果：编译开机，屏幕不会随着机器旋转而旋转

方法一：（成功）

1、点击界面 DisplaySettings.java

下面这段代码就是为了显示出setting 里面旋转按钮的点击界面

        if (RotationPolicy.isRotationLockToggleVisible(activity)) {            DropDownPreference rotatePreference =                    (DropDownPreference) findPreference(KEY_AUTO_ROTATE);            int rotateLockedResourceId;            // The following block sets the string used when rotation is locked.            // If the device locks specifically to portrait or landscape (rather than current            // rotation), then we use a different string to include this information.            if (allowAllRotations(activity)) {                rotateLockedResourceId = R.string.display_auto_rotate_stay_in_current;            } else {                if (RotationPolicy.getRotationLockOrientation(activity)                        == Configuration.ORIENTATION_PORTRAIT) {                    rotateLockedResourceId =                            R.string.display_auto_rotate_stay_in_portrait;                } else {                    rotateLockedResourceId =                            R.string.display_auto_rotate_stay_in_landscape;                }            }            rotatePreference.setEntries(new CharSequence[] {                    activity.getString(R.string.display_auto_rotate_rotate),                    activity.getString(rotateLockedResourceId),            });            rotatePreference.setEntryValues(new CharSequence[] { "0", "1" });            rotatePreference.setValueIndex(RotationPolicy.isRotationLocked(activity) ?                    1 : 0);            rotatePreference.setOnPreferenceChangeListener(new OnPreferenceChangeListener() {                @Override                public boolean onPreferenceChange(Preference preference, Object newValue) {                    final boolean locked = Integer.parseInt((String) newValue) != 0;                    MetricsLogger.action(getActivity(), MetricsEvent.ACTION_ROTATION_LOCK,                            locked);                    RotationPolicy.setRotationLock(activity, locked);                    return true;                }            });        } else {            removePreference(KEY_AUTO_ROTATE);        }

2、跳转到 RotationPolicy.java （修改文件）

    /**     * Returns true if rotation lock is enabled.     */    public static boolean isRotationLocked(Context context) {        return Settings.System.getIntForUser(context.getContentResolver(),                Settings.System.ACCELEROMETER_ROTATION, 0, UserHandle.USER_CURRENT) == 0;    }

将这个代码修改为：

/**     * Returns true if rotation lock is enabled.     */    public static boolean isRotationLocked(Context context) {        setRotationLock(true, NATURAL_ROTATION);        return true;    }

就是在它作出判断书不是自动旋转的时候，让它跳转到锁定自动旋转函数

private static void setRotationLock(final boolean enabled, final int rotation) {        AsyncTask.execute(new Runnable() {            @Override            public void run() {                try {                    IWindowManager wm = WindowManagerGlobal.getWindowManagerService();                    if (enabled) {                    Log.w(TAG, "lum_1 rotation is :" + rotation);                        wm.freezeRotation(rotation); （禁止自动旋转）                    } else {                    Log.w(TAG, "lum_2 rotation is " + rotation);                      wm.thawRotation(); （可以自动旋转）                    }                } catch (RemoteException exc) {                    Log.w(TAG, "Unable to save auto-rotate setting");                }            }        });    }

将自动旋转注销即可。

修改为：

   private static void setRotationLock(final boolean enabled, final int rotation) {        AsyncTask.execute(new Runnable() {            @Override            public void run() {                try {                    IWindowManager wm = WindowManagerGlobal.getWindowManagerService();                        wm.freezeRotation(rotation);                } catch (RemoteException exc) {                    Log.w(TAG, "Unable to save auto-rotate setting");                }            }        });    }

方法2 ：（没成功）

frameworks/base/cmds/screencap/screencap.cpp

修改：

    uint8_t displayOrientation = configs[activeConfig].orientation;    +        displayOrientation = ISurfaceComposer::eRotateNone;    uint32_t captureOrientation = ORIENTATION_MAP[displayOrientation];

文献参考：
辅助设置中自动旋转
http://blog.csdn.net/wangxueming/article/details/43969341

强制系统横屏竖屏
http://blog.csdn.net/kongbaidepao/article/details/54427625

Android6.0 旋转屏幕（四）应用强制设置方向
http://blog.csdn.net/kc58236582/article/details/53741445

关于 Android 4.4 系统屏幕旋转调研 (推荐)
http://blog.csdn.net/jangel_lee/article/details/44949155

android如何改变系统默认横竖屏方向
http://blog.csdn.net/wh_19910525/article/details/37963375

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