android 實(shí)現(xiàn)搖一搖功能
2018-07-20 來源：open-open
實(shí)現(xiàn)“搖一搖”功能，其實(shí)很簡單，就是檢測手機(jī)的重力感應(yīng)，具體實(shí)現(xiàn)代碼如下： 一、在 AndroidManifest.xml 中添加操作權(quán)限 二、實(shí)現(xiàn)代碼
package com.xs.test;
import android.app.Activity;
import android.hardware.Sensor;
import android.hardware.SensorEvent;
import android.hardware.SensorEventListener;
import android.hardware.SensorManager;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.os.Vibrator;
import android.util.Log;
import android.widget.Toast;
/**
* 安卓晃動手機(jī)監(jiān)聽--“搖一搖”
*
* @author 單紅宇
*
*/
public class TestSensorActivity extends Activity {
private SensorManager sensorManager;
private Vibrator vibrator;
private static final String TAG = "TestSensorActivity";
private static final int SENSOR_SHAKE = 10;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
sensorManager = (SensorManager) getSystemService(SENSOR_SERVICE);
vibrator = (Vibrator) getSystemService(VIBRATOR_SERVICE);
}
@Override
protected void onResume() {
super.onResume();
if (sensorManager != null) {// 注冊監(jiān)聽器
sensorManager.registerListener(sensorEventListener, sensorManager.getDefaultSensor(Sensor.TYPE_ACCELEROMETER), SensorManager.SENSOR_DELAY_NORMAL);
// 第一個(gè)參數(shù)是Listener，第二個(gè)參數(shù)是所得傳感器類型，第三個(gè)參數(shù)值獲取傳感器信息的頻率
}
}
@Override
protected void onPause() {
super.onPause();
if (sensorManager != null) {// 取消監(jiān)聽器
sensorManager.unregisterListener(sensorEventListener);
}
}
/**
* 重力感應(yīng)監(jiān)聽
*/
private SensorEventListener sensorEventListener = new SensorEventListener() {
@Override
public void onSensorChanged(SensorEvent event) {
// 傳感器信息改變時(shí)執(zhí)行該方法
float[] values = event.values;
float x = values[0]; // x軸方向的重力加速度，向右為正
float y = values[1]; // y軸方向的重力加速度，向前為正
float z = values[2]; // z軸方向的重力加速度，向上為正
Log.i(TAG, "x軸方向的重力加速度" + x + "；y軸方向的重力加速度" + y + "；z軸方向的重力加速度" + z);
// 一般在這三個(gè)方向的重力加速度達(dá)到40就達(dá)到了搖晃手機(jī)的狀態(tài)。
int medumValue = 19;// 三星 i9250怎么晃都不會超過20，沒辦法，只設(shè)置19了
if (Math.abs(x) > medumValue || Math.abs(y) > medumValue || Math.abs(z) > medumValue) {
vibrator.vibrate(200);
Message msg = new Message();
msg.what = SENSOR_SHAKE;
handler.sendMessage(msg);
}
}
@Override
public void onAccuracyChanged(Sensor sensor, int accuracy) {
}
};
/**
* 動作執(zhí)行
*/
Handler handler = new Handler() {
@Override
public void handleMessage(Message msg) {
super.handleMessage(msg);
switch (msg.what) {
case SENSOR_SHAKE:
Toast.makeText(TestSensorActivity.this, "檢測到搖晃，執(zhí)行操作！", Toast.LENGTH_SHORT).show();
Log.i(TAG, "檢測到搖晃，執(zhí)行操作！");
break;
}
}
};
}
這種搖一搖比較普通，沒有經(jīng)過算法的加強(qiáng)，重力加速度就是10。
算法優(yōu)化如下
package com.example.url;
import java.io.IOException;
import java.net.URL;
import com.hahashijie.imageload.ImageLoader;
import android.annotation.SuppressLint;
import android.app.Activity;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.drawable.Drawable;
import android.hardware.Sensor;
import android.hardware.SensorEvent;
import android.hardware.SensorEventListener;
import android.hardware.SensorManager;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.os.Vibrator;
import android.util.Log;
import android.widget.ImageView;
@SuppressLint("HandlerLeak")
public class MainActivity extends Activity {
private ImageView image;
private SensorManager sensorManager;
private Sensor sensor;
private Vibrator vibrator;
private static final int UPTATE_INTERVAL_TIME = 50;
private static final int SPEED_SHRESHOLD = 30;//這個(gè)值調(diào)節(jié)靈敏度
private long lastUpdateTime;
private float lastX;
private float lastY;
private float lastZ;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
sensorManager = (SensorManager) getSystemService(SENSOR_SERVICE);
vibrator = (Vibrator) getSystemService(VIBRATOR_SERVICE);
image = (ImageView) findViewById(R.id.image);
}
@Override
protected void onResume() {
// TODO Auto-generated method stub
super.onResume();
if (sensorManager != null) {
sensor = sensorManager.getDefaultSensor(Sensor.TYPE_ACCELEROMETER);
}
if (sensor != null) {
sensorManager.registerListener(sensorEventListener,
sensor,
SensorManager.SENSOR_DELAY_GAME);//這里選擇感應(yīng)頻率
}
}
/**
* 重力感應(yīng)監(jiān)聽
*/
private SensorEventListener sensorEventListener = new SensorEventListener() {
@Override
public void onSensorChanged(SensorEvent event) {
long currentUpdateTime = System.currentTimeMillis();
long timeInterval = currentUpdateTime - lastUpdateTime;
if (timeInterval < UPTATE_INTERVAL_TIME) {
return;
}
lastUpdateTime = currentUpdateTime;
// 傳感器信息改變時(shí)執(zhí)行該方法
float[] values = event.values;
float x = values[0]; // x軸方向的重力加速度，向右為正
float y = values[1]; // y軸方向的重力加速度，向前為正
float z = values[2]; // z軸方向的重力加速度，向上為正
float deltaX = x - lastX;
float deltaY = y - lastY;
float deltaZ = z - lastZ;
lastX = x;
lastY = y;
lastZ = z;
double speed = (Math.sqrt(deltaX * deltaX + deltaY * deltaY
+ deltaZ * deltaZ) / timeInterval) * 100;
if (speed >= SPEED_SHRESHOLD) {
vibrator.vibrate(300);
image.setImageResource(R.drawable.running01);
}
}
@Override
public void onAccuracyChanged(Sensor sensor, int accuracy) {
}
};
}
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