目录
添加权限：
android 相机判断水平java代码
添加权限：
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>
<uses-feature android:name="android.hardware.sensor.accelerometer"/>
<uses-feature android:name="android.hardware.sensor.gyroscope"/>
android 相机判断水平java代码
import android.content.Context;
import android.hardware.Sensor;
import android.hardware.SensorEvent;
import android.hardware.SensorEventListener;
import android.hardware.SensorManager;
import android.os.Bundle;
import android.widget.Toast;
import androidx.appcompat.app.AppCompatActivity;public class MainActivity extends AppCompatActivity implements SensorEventListener {private SensorManager sensorManager;private Sensor accelerometer;private Sensor gyroscope;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);sensorManager = (SensorManager) getSystemService(Context.SENSOR_SERVICE);accelerometer = sensorManager.getDefaultSensor(Sensor.TYPE_ACCELEROMETER);gyroscope = sensorManager.getDefaultSensor(Sensor.TYPE_GYROSCOPE);sensorManager.registerListener(this, accelerometer, SensorManager.SENSOR_DELAY_NORMAL);sensorManager.registerListener(this, gyroscope, SensorManager.SENSOR_DELAY_NORMAL);}@Overrideprotected void onResume() {super.onResume();sensorManager.registerListener(this, accelerometer, SensorManager.SENSOR_DELAY_NORMAL);sensorManager.registerListener(this, gyroscope, SensorManager.SENSOR_DELAY_NORMAL);}@Overrideprotected void onPause() {super.onPause();sensorManager.unregisterListener(this);}@Overridepublic void onSensorChanged(SensorEvent event) {if (event.sensor.getType() == Sensor.TYPE_ACCELEROMETER) {float[] gravity = event.values;float x = gravity[0];float y = gravity[1];float z = gravity[2];double angle = Math.toDegrees(Math.acos(z / Math.sqrt(x * x + y * y + z * z)));// 判断设备是否水平if (angle < 5) {Toast.makeText(this, "设备水平", Toast.LENGTH_SHORT).show();} else {Toast.makeText(this, "设备不水平", Toast.LENGTH_SHORT).show();}}}@Overridepublic void onAccuracyChanged(Sensor sensor, int accuracy) {// 不需要实现}
}