Detect Shaking

Saat ini build-in sensor accelerometer, gemetar android perangkat dapat dideteksi.

Dalam latihan ini, tiga SeekBar digunakan untuk menyesuaikan sensitif dari x, y, z. Tingkat perubahan yang dibandingkan dengan sensitif untuk mendeteksi gemetar.

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    >
<TextView 
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:text="@string/hello"
    />
<SeekBar
 android:id="@+id/xsensitive"  
 android:layout_width="fill_parent"  
 android:layout_height="wrap_content"  
 android:max="100" 
 /> 
<TextView
 android:id="@+id/x"
 android:layout_width="fill_parent"
 android:layout_height="wrap_content"
 />
<TextView
 android:id="@+id/xrate"
 android:layout_width="fill_parent"
 android:layout_height="wrap_content"
 />
<TextView
 android:id="@+id/xstate"
 android:layout_width="fill_parent"
 android:layout_height="wrap_content"
 />
<SeekBar
 android:id="@+id/ysensitive"  
 android:layout_width="fill_parent"  
 android:layout_height="wrap_content"  
 android:max="100" 
 /> 
<TextView
 android:id="@+id/y"
 android:layout_width="fill_parent"
 android:layout_height="wrap_content"
 />
<TextView
 android:id="@+id/yrate"
 android:layout_width="fill_parent"
 android:layout_height="wrap_content"
 />
<TextView
 android:id="@+id/ystate"
 android:layout_width="fill_parent"
 android:layout_height="wrap_content"
 />
<SeekBar
 android:id="@+id/zsensitive"  
 android:layout_width="fill_parent"  
 android:layout_height="wrap_content"  
 android:max="100" 
 /> 
<TextView
 android:id="@+id/z"
 android:layout_width="fill_parent"
 android:layout_height="wrap_content"
 />
<TextView
 android:id="@+id/zrate"
 android:layout_width="fill_parent"
 android:layout_height="wrap_content"
 />
<TextView
 android:id="@+id/zstate"
 android:layout_width="fill_parent"
 android:layout_height="wrap_content"
 />
</LinearLayout>

package com.exercise.AndroidDetectShaking;

import java.util.List;

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.widget.SeekBar;
import android.widget.TextView;

public class AndroidDetectShaking extends Activity {

 TextView text_x, text_xrate, text_xstate;
 TextView text_y, text_yrate, text_ystate;
 TextView text_z, text_zrate, text_zstate;
 SeekBar seekbar_x, seekbar_y, seekbar_z;

 SensorManager sensorManager;
    Sensor accelerometerSensor;
    boolean accelerometerPresent;
   
    float SensitiveX, SensitiveY, SensitiveZ;

    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
       
        seekbar_x = (SeekBar)findViewById(R.id.xsensitive);
        text_x = (TextView)findViewById(R.id.x);
        text_xrate = (TextView)findViewById(R.id.xrate);
        text_xstate = (TextView)findViewById(R.id.xstate);
        seekbar_y = (SeekBar)findViewById(R.id.ysensitive);
        text_y = (TextView)findViewById(R.id.y);
        text_yrate = (TextView)findViewById(R.id.yrate);
        text_ystate = (TextView)findViewById(R.id.ystate);
        seekbar_z = (SeekBar)findViewById(R.id.zsensitive);
        text_z = (TextView)findViewById(R.id.z);
        text_zrate = (TextView)findViewById(R.id.zrate);
        text_zstate = (TextView)findViewById(R.id.zstate);
       
        seekbar_x.setOnSeekBarChangeListener(seekbar_sensitiveOnSeekBarChangeListener);
        seekbar_y.setOnSeekBarChangeListener(seekbar_sensitiveOnSeekBarChangeListener);
        seekbar_z.setOnSeekBarChangeListener(seekbar_sensitiveOnSeekBarChangeListener);
       
        sensorManager = (SensorManager)getSystemService(SENSOR_SERVICE);
        List<Sensor> sensorList = sensorManager.getSensorList(Sensor.TYPE_ACCELEROMETER);
        if(sensorList.size() > 0){
         accelerometerPresent = true;
         accelerometerSensor = sensorList.get(0); 
        }
        else{
         accelerometerPresent = false; 
        }
    }
   
    SeekBar.OnSeekBarChangeListener seekbar_sensitiveOnSeekBarChangeListener
    = new SeekBar.OnSeekBarChangeListener(){

  @Override
  public void onProgressChanged(SeekBar arg0, int arg1, boolean arg2) {
   // TODO Auto-generated method stub
   if (arg0 == seekbar_x){
    SensitiveX = (float)arg1;
   }else if (arg0 == seekbar_y){
    SensitiveY = (float)arg1;
   }else if (arg0 == seekbar_z){
    SensitiveZ = (float)arg1;
   }
  }

  @Override
  public void onStartTrackingTouch(SeekBar arg0) {
   // TODO Auto-generated method stub
  }

  @Override
  public void onStopTrackingTouch(SeekBar arg0) {
   // TODO Auto-generated method stub
  }};
   
    @Override
 protected void onResume() {
  // TODO Auto-generated method stub
  super.onResume();
  if(accelerometerPresent){
   sensorManager.registerListener(accelerometerListener, accelerometerSensor, SensorManager.SENSOR_DELAY_NORMAL); 
  }
 }

 @Override
 protected void onStop() {
  // TODO Auto-generated method stub
  super.onStop();
  if(accelerometerPresent){
   sensorManager.unregisterListener(accelerometerListener); 
  }
 }

 private SensorEventListener accelerometerListener = new SensorEventListener(){
 
  float lastx, lasty, lastz;
  long lasttime;
  boolean firsttime = true;

  @Override
  public void onAccuracyChanged(Sensor arg0, int arg1) {
   // TODO Auto-generated method stub
  }

  @Override
  public void onSensorChanged(SensorEvent arg0) {
   // TODO Auto-generated method stub
   float x_value = arg0.values[0];
   float y_value = arg0.values[1];
   float z_value = arg0.values[2];
   text_x.setText(String.valueOf(x_value));
   text_y.setText(String.valueOf(y_value));
   text_z.setText(String.valueOf(z_value));
  
   long currenttime = System.currentTimeMillis();
   if(!firsttime){
    long deltatime = currenttime - lasttime;
    float xrate = Math.abs(x_value - lastx) * 10000/deltatime;
    float yrate = Math.abs(y_value - lasty) * 10000/deltatime;
    float zrate = Math.abs(z_value - lastz) * 10000/deltatime;
    text_xrate.setText(String.valueOf(xrate));
    text_yrate.setText(String.valueOf(yrate));
    text_zrate.setText(String.valueOf(zrate));
   
    if (xrate>SensitiveX){
     text_xstate.setText("Shaking:)");
    }else{
     text_xstate.setText("");
    }
   
    if (yrate>SensitiveY){
     text_ystate.setText("Shaking:)");
    }else{
     text_ystate.setText("");
    }
   
    if (zrate>SensitiveZ){
     text_zstate.setText("Shaking:)");
    }else{
     text_zstate.setText("");
    }
   }
   lasttime = currenttime;
   lastx = x_value;
   lasty = y_value;
   lastz = z_value;
   firsttime = false;
  }
 };
}

Download the files.

Categories: Android