问加速度计挂起

EN

package com.emblem.accelerometer;

import android.app.Activity;
import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.RectF;
import android.graphics.drawable.ShapeDrawable;
import android.graphics.drawable.shapes.OvalShape;
import android.hardware.Sensor;
import android.hardware.SensorEvent;
import android.hardware.SensorEventListener;
import android.hardware.SensorManager;
import android.os.Bundle;
import android.view.View;

public class AccelerometerActivity extends Activity implements
    SensorEventListener {
/** Called when the activity is first created. */
CustomDrawableView mCustomDrawableView = null;
ShapeDrawable mDrawable = new ShapeDrawable();
public static int x;
public static int y;

private SensorManager sensorManager = null;

/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {

    super.onCreate(savedInstanceState);
    // Get a reference to a SensorManager
    sensorManager = (SensorManager) getSystemService(SENSOR_SERVICE);
    mCustomDrawableView = new CustomDrawableView(this);
    setContentView(mCustomDrawableView);
    // setContentView(R.layout.main);

}

// This method will update the UI on new sensor events
public void onSensorChanged(SensorEvent sensorEvent) {

    if (sensorEvent.sensor.getType() == Sensor.TYPE_ACCELEROMETER) {
        // the values you were calculating originally here were over
        // 10000!
        x = (int) Math.pow(sensorEvent.values[0], 2);
        y = (int) Math.pow(sensorEvent.values[1], 2);

    }

    if (sensorEvent.sensor.getType() == Sensor.TYPE_ORIENTATION) {

    }

}

// I've chosen to not implement this method
public void onAccuracyChanged(Sensor arg0, int arg1) {
    // TODO Auto-generated method stub

}

@Override
protected void onResume() {
    super.onResume();
    // Register this class as a listener for the accelerometer sensor
    sensorManager.registerListener(this,
            sensorManager.getDefaultSensor(Sensor.TYPE_ACCELEROMETER),
            SensorManager.SENSOR_DELAY_NORMAL);
    // ...and the orientation sensor
    sensorManager.registerListener(this,
            sensorManager.getDefaultSensor(Sensor.TYPE_ORIENTATION),
            SensorManager.SENSOR_DELAY_NORMAL);
}

@Override
protected void onStop() {
    // Unregister the listener
    sensorManager.unregisterListener(this);
    super.onStop();
}

public class CustomDrawableView extends View {
    static final int width = 50;
    static final int height = 50;

    public CustomDrawableView(Context context) {
        super(context);

        mDrawable = new ShapeDrawable(new OvalShape());
        mDrawable.getPaint().setColor(0xff74AC23);
        mDrawable.setBounds(x, y, x + width, y + height);
    }

    @Override
    protected void onDraw(Canvas canvas) {
        RectF oval = new RectF(AccelerometerActivity.x,
                AccelerometerActivity.y, AccelerometerActivity.x + width,
                AccelerometerActivity.y + height); // set bounds of
                                                    // rectangle
        Paint p = new Paint(); // set some paint options
        p.setColor(Color.BLUE);
        canvas.drawOval(oval, p);
        invalidate();
    }
}
}