【移动应用开发技术】Android中如何使用重力传感器实现横竖屏放向切换功能

【移动应用开发技术】Android中如何使用重力传感器实现横竖屏放向切换功能

package

com.d1ev.touch.App.helper;

import

android.app.Activity;

import

android.content.pm.ActivityInfo;

import

android.util.Log;

import

android.view.OrientationEventListener;

import

java.lang.ref.WeakReference;

/**

*

Created

by

Administrator

on

2016/12/3

0003.

*

监听重力系统传感器的变化，为Vr视频播放器而定制

*/

public

class

MySensorHelper

{

private

static

final

String

TAG

=

MySensorHelper.class.getSimpleName();

private

OrientationEventListener

mLandOrientationListener;

private

OrientationEventListener

mPortOrientationListener;

private

WeakReference<Activity>

mActivityWeakRef;

private

boolean

isPortLock

=

false;

private

boolean

isLandLock=false;

public

MySensorHelper(final

Activity

activity)

{

this.mActivityWeakRef

=

new

WeakReference(activity);

this.mLandOrientationListener

=

new

OrientationEventListener(activity,

3)

{

public

void

onOrientationChanged(int

orientation)

{

Log.d(MySensorHelper.TAG,

"mLandOrientationListener");

if(orientation

<

100

&&

orientation

>

80

||

orientation

<

280

&&

orientation

>

260)

{

Log.e(MySensorHelper.TAG,

"转到了横屏");

if(!MySensorHelper.this.isLandLock)

{

Activity

mActivity

=

(Activity)MySensorHelper.this.mActivityWeakRef.get();

if(mActivity

!=

null)

{

Log.e(MySensorHelper.TAG,

"转到了横屏##################");

mActivity.setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);

isLandLock=true;

isPortLock=false;

}

}

}

}

};

this.mPortOrientationListener

=

new

OrientationEventListener(activity,

3)

{

public

void

onOrientationChanged(int

orientation)

{

Log.w(MySensorHelper.TAG,

"mPortOrientationListener");

if(orientation

<

10

||

orientation

>

350

||

orientation

<

190

&&

orientation

>

170)

{

Log.e(MySensorHelper.TAG,

"转到了竖屏");

if(!MySensorHelper.this.isPortLock)

{

Activity

mActivity

=

(Activity)MySensorHelper.this.mActivityWeakRef.get();

if(mActivity

!=

null)

{

Log.e(MySensorHelper.TAG,

"转到了竖屏!!!!!!!!!!!!!!!!!!!!!!");

mActivity.setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);

isPortLock=true;

isLandLock=false;

}

}

}

}

};

//this.disable();

}

//禁用切换屏幕的开关

public

void

disable()

{

Log.e(TAG,

"disable");

this.mPortOrientationListener.disable();

this.mLandOrientationListener.disable();

}

//开启横竖屏切换的开关

public

void

enable(){

this.mPortOrientationListener.enable();

this.mLandOrientationListener.enable();

}

//设置竖屏是否上锁，true锁定屏幕,fanle解锁

public

void

setPortLock(boolean

lockFlag)

{

this.isPortLock