實現“搖一搖”功能,其實很簡單,就是檢測手機的重力感應,具體實現代碼如下:
1、在 AndroidManifest.xml 中添加操作權限
2、實現代碼
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; /** * 安卓晃動手機監聽--“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) {// 注冊監聽器 sensorManager.registerListener(sensorEventListener, sensorManager.getDefaultSensor(Sensor.TYPE_ACCELEROMETER), SensorManager.SENSOR_DELAY_NORMAL); // 第一個參數是Listener,第二個參數是所得傳感器類型,第三個參數值獲取傳感器信息的頻率 } } @Override protected void onPause() { super.onPause(); if (sensorManager != null) {// 取消監聽器 sensorManager.unregisterListener(sensorEventListener); } } /** * 重力感應監聽 */ private SensorEventListener sensorEventListener = new SensorEventListener() { @Override public void onSensorChanged(SensorEvent event) { // 傳感器信息改變時執行該方法 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); // 一般在這三個方向的重力加速度達到40就達到了搖晃手機的狀態。 int medumValue = 19;// 三星 i9250怎么晃都不會超過20,沒辦法,只設置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,執行操作!", Toast.LENGTH_SHORT).show(); Log.i(TAG, "檢測到搖晃,執行操作!"); break; } } }; } 這種搖一搖比較普通,沒有經過算法的加強,重力加速度就是10。
算法優化如下
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;//這個值調節靈敏度private long lastUpdateTime;private float lastX;private float lastY;private float lastZ;@Overrideprotected 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);}@Overrideprotected void onResume() {// TODO Auto-generated method stubsuper.onResume();if (sensorManager != null) { sensor = sensorManager.getDefaultSensor(Sensor.TYPE_ACCELEROMETER); } if (sensor != null) { sensorManager.registerListener(sensorEventListener, sensor,SensorManager.SENSOR_DELAY_GAME);//這里選擇感應頻率 }}/*** 重力感應監聽*/private SensorEventListener sensorEventListener = new SensorEventListener() {@Overridepublic void onSensorChanged(SensorEvent event) {long currentUpdateTime = System.currentTimeMillis();long timeInterval = currentUpdateTime - lastUpdateTime;if (timeInterval < UPTATE_INTERVAL_TIME) {return;}lastUpdateTime = currentUpdateTime;// 傳感器信息改變時執行該方法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);}}@Overridepublic void onAccuracyChanged(Sensor sensor, int accuracy) {}};}以上就是本文的全部內容,希望對大家的學習有所幫助,也希望大家多多支持武林網。
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