Android的screenOrientation设置

16lz 2021-01-23

首先在AndroidManifest.xml中，对需要设置的Activity加上如下两条属性：

Java代码

android:configChanges="orientation|keyboard"（转屏时不重置Activity，
置了此项，则无法为横向和纵向分别设置不同的布局。因为转屏时不会删除并重新加载）
android:screenOrientation="sensor"（开启重力传感器）

转屏函数：

Java代码

importandroid.content.pm.ActivityInfo;
setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_NOSENSOR);
//强制指定纵向value为5
setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_REVERSE_PORTRAIT);
//强制指定反方向纵向value为9

重力传感器监测：

Java代码

importandroid.app.Activity;
importandroid.content.Context;
importandroid.hardware.Sensor;
importandroid.hardware.SensorEvent;
importandroid.hardware.SensorEventListener;
importandroid.hardware.SensorManager;
importandroid.os.Bundle;
publicclassasdextendsActivity{
SensorManagermManager;
SensormSensor;
SensorEventListenermListener;
@Override
protectedvoidonCreate(BundlesavedInstanceState){
super.onCreate(savedInstanceState);
setRequestedOrientation(5);//初始化屏幕方向
mManager=(SensorManager)getSystemService(Context.SENSOR_SERVICE);
mSensor=mManager.getDefaultSensor(Sensor.TYPE_ACCELEROMETER);
mListener=newSensorEventListener(){
publicvoidonAccuracyChanged(Sensorsensor,intaccuracy){
};
publicvoidonSensorChanged(SensorEventevent){
floatx=event.values[SensorManager.DATA_X];
floaty=event.values[SensorManager.DATA_Y];
floatz=event.values[SensorManager.DATA_Z];
setCustomOrientation(x,y,z);
};
};
mManager.registerListener(mListener,mSensor,SensorManager.SENSOR_DELAY_GAME);
}
publicvoidsetCustomOrientation(floatx,floaty,floatz){
if(y>1.5)
{
//setRequestedOrientation(
//ActivityInfo.SCREEN_ORIENTATION_SENSOR_PORTRAIT);
setRequestedOrientation(5);
}
elseif(y<-1.5)
{
setRequestedOrientation(9);
}
};
@Override
protectedvoidonResume(){
super.onResume();
mManager.registerListener(mListener,mSensor,
SensorManager.SENSOR_DELAY_GAME);
};
@Override
protectedvoidonPause(){
super.onPause();
mManager.unregisterListener(mListener);
};
}

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