Locks the activity to the orientation the user was in when they entered the activity. - Android Activity

Android examples for Activity:Activity Orientation

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Description

Locks the activity to the orientation the user was in when they entered the activity.

Demo Code


//package com.java2s;
import android.app.Activity;
import android.content.pm.ActivityInfo;
import android.graphics.Point;

import android.view.Display;
import android.view.Surface;

public class Main {
    /**// w  w w.ja v a2 s . co  m
     * Locks the activity to the orientation the user was in when they entered the activity.
     * Call in Activity.onCreate
     * Android, why you no have this?
     * @param activity activity to lock
     */
    public static void lockToCurrentOrientation(Activity activity) {
        Display display = activity.getWindowManager().getDefaultDisplay();
        int rotation = display.getRotation();
        int height;
        int width;
        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);
            }
        }
    }
}

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