我需要添加一个摇功能，将刷新我的Android应用程序。
我所找到的所有文档都涉及实现SensorListener，但Eclipse告诉我它已被弃用，并建议使用SensorEventListener。
有人知道如何创建这个震动控制器吗?
当前回答
我真的很喜欢彼得dk的回答。我自作主张对他的代码做了一些调整。
文件:ShakeDetector.java
import android.hardware.Sensor;
import android.hardware.SensorEvent;
import android.hardware.SensorEventListener;
import android.hardware.SensorManager;
import android.util.FloatMath;
public class ShakeDetector implements SensorEventListener {
// The gForce that is necessary to register as shake. Must be greater than 1G (one earth gravity unit)
private static final float SHAKE_THRESHOLD_GRAVITY = 2.7F;
private static final int SHAKE_SLOP_TIME_MS = 500;
private static final int SHAKE_COUNT_RESET_TIME_MS = 3000;
private OnShakeListener mListener;
private long mShakeTimestamp;
private int mShakeCount;
public void setOnShakeListener(OnShakeListener listener) {
this.mListener = listener;
}
public interface OnShakeListener {
public void onShake(int count);
}
@Override
public void onAccuracyChanged(Sensor sensor, int accuracy) {
// ignore
}
@Override
public void onSensorChanged(SensorEvent event) {
if (mListener != null) {
float x = event.values[0];
float y = event.values[1];
float z = event.values[2];
float gX = x / SensorManager.GRAVITY_EARTH;
float gY = y / SensorManager.GRAVITY_EARTH;
float gZ = z / SensorManager.GRAVITY_EARTH;
// gForce will be close to 1 when there is no movement.
float gForce = FloatMath.sqrt(gX * gX + gY * gY + gZ * gZ);
if (gForce > SHAKE_THRESHOLD_GRAVITY) {
final long now = System.currentTimeMillis();
// ignore shake events too close to each other (500ms)
if (mShakeTimestamp + SHAKE_SLOP_TIME_MS > now ) {
return;
}
// reset the shake count after 3 seconds of no shakes
if (mShakeTimestamp + SHAKE_COUNT_RESET_TIME_MS < now ) {
mShakeCount = 0;
}
mShakeTimestamp = now;
mShakeCount++;
mListener.onShake(mShakeCount);
}
}
}
}
另外，不要忘记需要向SensorManager注册一个ShakeDetector实例。
// ShakeDetector initialization
mSensorManager = (SensorManager) getSystemService(Context.SENSOR_SERVICE);
mAccelerometer = mSensorManager.getDefaultSensor(Sensor.TYPE_ACCELEROMETER);
mShakeDetector = new ShakeDetector();
mShakeDetector.setOnShakeListener(new OnShakeListener() {
@Override
public void onShake(int count) {
handleShakeEvent(count);
}
});
mSensorManager.registerListener(mShakeDetector, mAccelerometer, SensorManager.SENSOR_DELAY_UI);
其他回答
你可能想试试开源tinybus。有了它，震动检测就像这样简单。
public class MainActivity extends Activity {
private Bus mBus;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
...
// Create a bus and attach it to activity
mBus = TinyBus.from(this).wire(new ShakeEventWire());
}
@Subscribe
public void onShakeEvent(ShakeEvent event) {
Toast.makeText(this, "Device has been shaken",
Toast.LENGTH_SHORT).show();
}
@Override
protected void onStart() {
super.onStart();
mBus.register(this);
}
@Override
protected void onStop() {
mBus.unregister(this);
super.onStop();
}
}
它采用地震仪进行振动检测。
我修改了@peceps的答案，并使它的kotlin版本。我还添加了LifecycleOwner参数，使其能够感知生命周期。
import android.hardware.Sensor
import android.hardware.SensorEvent
import android.hardware.SensorEventListener
import android.hardware.SensorManager
import androidx.lifecycle.DefaultLifecycleObserver
import androidx.lifecycle.LifecycleOwner
import kotlin.math.abs
/**
* Listener that detects shake gesture.
*/
class ShakeEventListener(
lifecycleOwner: LifecycleOwner,
private val sensorManager: SensorManager,
private val onShake: () -> Unit = {}
) : SensorEventListener, DefaultLifecycleObserver {
/** Time when the gesture started. */
private var mFirstDirectionChangeTime: Long = 0
/** Time when the last movement started. */
private var mLastDirectionChangeTime: Long = 0
/** How many movements are considered so far. */
private var mDirectionChangeCount = 0
/** The last x position. */
private var lastX = 0f
/** The last y position. */
private var lastY = 0f
/** The last z position. */
private var lastZ = 0f
init {
sensorManager.registerListener(
this,
sensorManager.getDefaultSensor(Sensor.TYPE_ACCELEROMETER),
SensorManager.SENSOR_DELAY_UI
)
// observe lifecycle state
lifecycleOwner.lifecycle.addObserver(this)
}
override fun onResume(owner: LifecycleOwner) {
sensorManager.registerListener(
this,
sensorManager.getDefaultSensor(Sensor.TYPE_ACCELEROMETER),
SensorManager.SENSOR_DELAY_UI
)
}
override fun onPause(owner: LifecycleOwner) {
sensorManager.unregisterListener(this)
}
override fun onSensorChanged(se: SensorEvent) {
// get sensor data
val x = se.values[0]
val y = se.values[1]
val z = se.values[2]
// calculate movement
val totalMovement = abs(x + y + z - lastX - lastY - lastZ)
if (totalMovement > MIN_FORCE) {
// get time
val now = System.currentTimeMillis()
// store first movement time
if (mFirstDirectionChangeTime == 0L) {
mFirstDirectionChangeTime = now
mLastDirectionChangeTime = now
}
// check if the last movement was not long ago
val lastChangeWasAgo = now - mLastDirectionChangeTime
if (lastChangeWasAgo < MAX_PAUSE_BETWEEN_DIRECTION_CHANGE) {
// store movement data
mLastDirectionChangeTime = now
mDirectionChangeCount++
// store last sensor data
lastX = x
lastY = y
lastZ = z
// check how many movements are so far
if (mDirectionChangeCount >= MIN_DIRECTION_CHANGE) {
// check total duration
val totalDuration = now - mFirstDirectionChangeTime
if (totalDuration < MAX_TOTAL_DURATION_OF_SHAKE) {
onShake()
resetShakeParameters()
}
}
} else {
resetShakeParameters()
}
}
}
/**
* Resets the shake parameters to their default values.
*/
private fun resetShakeParameters() {
mFirstDirectionChangeTime = 0
mDirectionChangeCount = 0
mLastDirectionChangeTime = 0
lastX = 0f
lastY = 0f
lastZ = 0f
}
override fun onAccuracyChanged(sensor: Sensor, accuracy: Int) {}
companion object {
/** Minimum movement force to consider. */
private const val MIN_FORCE = 10
/**
* Minimum times in a shake gesture that the direction of movement needs to
* change.
*/
private const val MIN_DIRECTION_CHANGE = 3
/** Maximum pause between movements. */
private const val MAX_PAUSE_BETWEEN_DIRECTION_CHANGE = 200
/** Maximum allowed time for shake gesture. */
private const val MAX_TOTAL_DURATION_OF_SHAKE = 400
}
}
在您的活动中，添加以下代码，使其检测震动事件:
ShakeEventListener(this, sensorManager){
// onShake logic
}
我真的很喜欢彼得dk的回答。我自作主张对他的代码做了一些调整。
文件:ShakeDetector.java
import android.hardware.Sensor;
import android.hardware.SensorEvent;
import android.hardware.SensorEventListener;
import android.hardware.SensorManager;
import android.util.FloatMath;
public class ShakeDetector implements SensorEventListener {
// The gForce that is necessary to register as shake. Must be greater than 1G (one earth gravity unit)
private static final float SHAKE_THRESHOLD_GRAVITY = 2.7F;
private static final int SHAKE_SLOP_TIME_MS = 500;
private static final int SHAKE_COUNT_RESET_TIME_MS = 3000;
private OnShakeListener mListener;
private long mShakeTimestamp;
private int mShakeCount;
public void setOnShakeListener(OnShakeListener listener) {
this.mListener = listener;
}
public interface OnShakeListener {
public void onShake(int count);
}
@Override
public void onAccuracyChanged(Sensor sensor, int accuracy) {
// ignore
}
@Override
public void onSensorChanged(SensorEvent event) {
if (mListener != null) {
float x = event.values[0];
float y = event.values[1];
float z = event.values[2];
float gX = x / SensorManager.GRAVITY_EARTH;
float gY = y / SensorManager.GRAVITY_EARTH;
float gZ = z / SensorManager.GRAVITY_EARTH;
// gForce will be close to 1 when there is no movement.
float gForce = FloatMath.sqrt(gX * gX + gY * gY + gZ * gZ);
if (gForce > SHAKE_THRESHOLD_GRAVITY) {
final long now = System.currentTimeMillis();
// ignore shake events too close to each other (500ms)
if (mShakeTimestamp + SHAKE_SLOP_TIME_MS > now ) {
return;
}
// reset the shake count after 3 seconds of no shakes
if (mShakeTimestamp + SHAKE_COUNT_RESET_TIME_MS < now ) {
mShakeCount = 0;
}
mShakeTimestamp = now;
mShakeCount++;
mListener.onShake(mShakeCount);
}
}
}
}
另外，不要忘记需要向SensorManager注册一个ShakeDetector实例。
// ShakeDetector initialization
mSensorManager = (SensorManager) getSystemService(Context.SENSOR_SERVICE);
mAccelerometer = mSensorManager.getDefaultSensor(Sensor.TYPE_ACCELEROMETER);
mShakeDetector = new ShakeDetector();
mShakeDetector.setOnShakeListener(new OnShakeListener() {
@Override
public void onShake(int count) {
handleShakeEvent(count);
}
});
mSensorManager.registerListener(mShakeDetector, mAccelerometer, SensorManager.SENSOR_DELAY_UI);
您应该订阅SensorEventListener，并获取加速度计数据。 一旦你有了它，你应该监测在某个轴上加速度方向(符号)的突然变化。这将是一个很好的指示“摇动”移动的设备。
我正在为我的大学项目开发一个运动检测和震动检测应用程序。
除了应用程序的原始目标之外，我还从应用程序中分离了库部分(负责运动和震动检测)。该代码是免费的，可在SourceForge上获得，项目名称为“BenderCatch”。我正在制作的文件将在9月中旬左右准备好。 http://sf.net/projects/bendercatch
它使用了一种更精确的方法来检测震动:当你执行震动时，既观察SensorEvents之间的力差，也观察X轴和Y轴上的振动。它甚至可以在每次震动时发出声音(或振动)。
欢迎通过电子邮件raffaele [at] terzigno [dot] com向我询问更多信息
推荐文章
- Android:为什么视图没有maxHeight ?
- 如何获得具有已知资源名称的资源id ?
- 在Android上将字符串转换为整数
- 为什么“System.out。”println“工作在Android?
- WebView显示err_cleartext_not_allowed尽管站点是HTTPS
- Android M权限:对shouldShowRequestPermissionRationale()函数的使用感到困惑
- 为什么构建类型与产品风味不同?
- 我如何在一个片段中访问getSupportFragmentManager() ?
- 调试在哪里。Android Studio中的密钥存储库
- 从资产中读取文件
- 在不活动的地方调用getLayoutInflater()
- 设置Android布局元素的背景颜色
- 错误:'keytool'不能被识别为内部或外部命令、可操作程序或批处理文件
- 在应用程序本身中更改Locale
- apk (.apk)和应用程序包(.aab)的区别
