ANDROID_ (sensor) Gets the sensor in the phone

The sensor is a detection device that can feel the information being measured, and can transform the detected and sensed information into an electrical signal or other required form of information output according to a certain law.

There are many sensors (physical devices) built into the Android operating system that can detect, perceive, and communicate the signals and physical conditions of the outside world to other devices.

For example, some games or software can automatically identify the screen to change the layout of screen display

Here are some of the sensors supported by Android:

Acceleration Sensor Sensor.type_accelerometerGyro sensor Sensor.type_gyroscopeAmbient light sensor sensor.type_lightelectromagnetic field sensor Sensor.type_magnetic_fieldDirection sensor sensor.type_orientation:pressure sensor sensor.type_pressure:distance sensor sensor.type_proximity:temperature sensor sensor.type_temperature:

Run:

Program Structure:

<?xml version= "1.0" encoding= "Utf-8"? ><linearlayout xmlns:android= "Http://schemas.android.com/apk/res/android"Xmlns:app= "Http://schemas.android.com/apk/res-auto"Xmlns:tools= "Http://schemas.android.com/tools"android:orientation= "Vertical"Android:layout_width= "Fill_parent"Android:layout_height= "Fill_parent"Tools:context= "Com.example.asus.gary_01.MainActivity" > <TextView android:layout_width= "Fill_parent"Android:layout_height= "Wrap_content"Android:text= "Sensor operation!" "android:textsize= "10pt"/> <Button Android:id= "@+id/button"Android:layout_width= "Match_parent"Android:layout_height= "Wrap_content"Android:text= "Get phone sensor information"/> <TextView Android:id= "@+id/textview"Android:scrollbars= "Vertical"Android:layout_width= "Fill_parent"Android:layout_height= "Fill_parent"android:textsize= "8pt"/></linearlayout>

Activity_main

 Packagecom.example.asus.gary_01;ImportAndroid.content.Context;ImportAndroid.hardware.Sensor;ImportAndroid.hardware.SensorManager;Importandroid.support.v7.app.AppCompatActivity;ImportAndroid.os.Bundle;ImportAndroid.text.method.ScrollingMovementMethod;ImportAndroid.view.View;ImportAndroid.widget.Button;ImportAndroid.widget.TextView;Importjava.util.List; Public classMainactivityextendsappcompatactivity {PrivateTextView tx1; @Overrideprotected voidonCreate (Bundle savedinstancestate) {Super. OnCreate (savedinstancestate);        Setcontentview (R.layout.activity_main); Button BT1=(Button) Findviewbyid (R.id.button); TX1=(TextView) Findviewbyid (R.id.textview); //get the Sensor manager from the system        FinalSensormanager SM =(Sensormanager) Getsystemservice (Context.sensor_service); Bt1.setonclicklistener (NewView.onclicklistener () {@Override Public voidOnClick (View v) {String str; //get the full list of sensors from the sensor managerList<sensor> allsensors =sm.getsensorlist (Sensor.type_all); inti; //Add scroll bars to ViewtextTx1.setmovementmethod (Scrollingmovementmethod.getinstance ()); //shows how many sensors there areTx1.settext ("The mobile phone has a" +allsensors.size () + "sensor, respectively, they are:");                Sensor s; //display specific information for each sensor                 for(I=0;i<allsensors.size (); i++) {s=Allsensors.get (i); STR= "Device Name:" +S.getname (); Switch(S.gettype ()) {//Acceleration Sensor Sensor.type_accelerometer                         CaseSensor.TYPE_ACCELEROMETER:tx1.setText (Tx1.gettext ()+ "\ n" +i+ "acceleration sensor accelerometer:\n" +str);  Break; //Gyro sensor Sensor.type_gyroscope                         CaseSensor.TYPE_GYROSCOPE:tx1.setText (Tx1.gettext ()+ "\ n" +i+ "Gyro sensor gyroscope:\n" +str);  Break; //Ambient light sensor sensor.type_light                         CaseSensor.TYPE_LIGHT:tx1.setText (Tx1.gettext ()+ "\ n" +i+ "Ambient light sensor light:\n" +str);  Break; //electromagnetic field sensor Sensor.type_magnetic_field                         CaseSensor.TYPE_MAGNETIC_FIELD:tx1.setText (Tx1.gettext ()+ "\ n" +i+ "electromagnetic field sensor magnetic:\n" +str);  Break; //Direction sensor sensor.type_orientation:                         CaseSensor.TYPE_ORIENTATION:tx1.setText (Tx1.gettext ()+ "\ n" +i+ "Direction sensor orientation:\n" +str);  Break; //pressure sensor sensor.type_pressure:                         CaseSensor.TYPE_PRESSURE:tx1.setText (Tx1.gettext ()+ "\ n" +i+ "Pressure sensor pressure:\n" +str);  Break; //distance sensor sensor.type_proximity:                         CaseSensor.TYPE_PROXIMITY:tx1.setText (Tx1.gettext ()+ "\ n" +i+ "Distance sensor proximity:\n" +str);  Break; //temperature sensor sensor.type_temperature:                         CaseSensor.TYPE_TEMPERATURE:tx1.setText (Tx1.gettext ()+ "\ n" +i+ "Temperature sensor temperature:\n" +str);  Break; default: Tx1.settext (Tx1.gettext ()+ "\ n" +i+ "Unknown sensor: \ n" +str);  Break;    }                }            }        }); }}

mainactivity

First, the interface layout

Two TextView, one button, below the TextView support scrolling operation

Click button to get the phone sensor and display it on the textview below

Add scroll bar to TextView: Portal

XML code:

Set the orientation of the scroll bar

android:scrollbars= "Vertical"

Settings in Java

tx1= (TextView) Findviewbyid (R.ID.TV1);

Set scrolling mode
Tx1.setmovementmethod (Scrollingmovementmethod.getinstance ());

II. Realization of the procedure

Get the sensor manager from the system
Final Sensormanager sm = (Sensormanager) getsystemservice (Context.sensor_service);

Get the full list of sensors from the sensor manager
list<sensor> allsensors = sm.getsensorlist (Sensor.type_all);

Bt1.setonclicklistener (NewView.onclicklistener () {@Override Public voidOnClick (View v) {String str; //get the full list of sensors from the sensor managerList<sensor> allsensors =sm.getsensorlist (Sensor.type_all); inti; //Add scroll bars to ViewtextTx1.setmovementmethod (Scrollingmovementmethod.getinstance ()); //shows how many sensors there areTx1.settext ("The mobile phone has a" +allsensors.size () + "sensor, respectively, they are:");                Sensor s; //display specific information for each sensor                 for(I=0;i<allsensors.size (); i++) {s=Allsensors.get (i); STR= "Device Name:" +S.getname (); Switch(S.gettype ()) {//Acceleration Sensor Sensor.type_accelerometer                         CaseSensor.TYPE_ACCELEROMETER:tx1.setText (Tx1.gettext ()+ "\ n" +i+ "acceleration sensor accelerometer:\n" +str);  Break; //Gyro sensor Sensor.type_gyroscope                         CaseSensor.TYPE_GYROSCOPE:tx1.setText (Tx1.gettext ()+ "\ n" +i+ "Gyro sensor gyroscope:\n" +str);  Break; //Ambient light sensor sensor.type_light                         CaseSensor.TYPE_LIGHT:tx1.setText (Tx1.gettext ()+ "\ n" +i+ "Ambient light sensor light:\n" +str);  Break; //electromagnetic field sensor Sensor.type_magnetic_field                         CaseSensor.TYPE_MAGNETIC_FIELD:tx1.setText (Tx1.gettext ()+ "\ n" +i+ "electromagnetic field sensor magnetic:\n" +str);  Break; //Direction sensor sensor.type_orientation:                         CaseSensor.TYPE_ORIENTATION:tx1.setText (Tx1.gettext ()+ "\ n" +i+ "Direction sensor orientation:\n" +str);  Break; //pressure sensor sensor.type_pressure:                         CaseSensor.TYPE_PRESSURE:tx1.setText (Tx1.gettext ()+ "\ n" +i+ "Pressure sensor pressure:\n" +str);  Break; //distance sensor sensor.type_proximity:                         CaseSensor.TYPE_PROXIMITY:tx1.setText (Tx1.gettext ()+ "\ n" +i+ "Distance sensor proximity:\n" +str);  Break; //temperature sensor sensor.type_temperature:                         CaseSensor.TYPE_TEMPERATURE:tx1.setText (Tx1.gettext ()+ "\ n" +i+ "Temperature sensor temperature:\n" +str);  Break; default: Tx1.settext (Tx1.gettext ()+ "\ n" +i+ "Unknown sensor: \ n" +str);  Break; }                }            }        });

ANDROID_ (sensor) Gets the sensor in the phone