android各种传感器实例源码

package com.example.android.sensor; import java.util.List; import android.app.Activity; import android.content.Context; import android.graphics.Bitmap; import android.graphics.BitmapFactory; import android.graphics.Canvas; import android.graphics.Color; import android.graphics.Matrix; import android.graphics.Paint; import android.hardware.Sensor; import android.hardware.SensorEvent; import android.hardware.SensorEventListener; import android.hardware.SensorManager; import android.os.Bundle; import android.view.SurfaceHolder; import android.view.SurfaceView; public class OrientationDemo extends Activity implements SensorEventListener { private SensorManager sensorManager; private MySurfaceView view; private Object[] orientation = { "Rotate Z-axis Orientation", "Rotate X-axis Orientation","Rotate Y-axis Orientation", }; //OrientationDemo主程序 @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); sensorManager = (SensorManager)getSystemService(SENSOR_SERVICE); view = new MySurfaceView(this); setContentView(view); } @Override protected void onResume() { super.onResume(); List<Sensor> sensors = sensorManager.getSensorList(Sensor.TYPE_ORIENTATION); if (sensors.size() > 0) { sensorManager.registerListener(this, sensors.get(0), SensorManager.SENSOR_DELAY_NORMAL); } } @Override protected void onPause() { super.onPause(); sensorManager.unregisterListener(this); } public void onAccuracyChanged(Sensor sensor, int accuracy) { } public void onSensorChanged(SensorEvent event) { view.onValueChanged(event.values); } class MySurfaceView extends SurfaceView implements SurfaceHolder.Callback { private Bitmap bitmap, bitmap1, bitmap2,curBitmap; private float x, y, z; private float x1=130, y1=160; private int curWidth, curHeight; public MySurfaceView(Context context) { super(context); getHolder().addCallback(this); bitmap = BitmapFactory.decodeResource(getResources(), R.drawable.androidplate); bitmap1 = BitmapFactory.decodeResource(getResources(), R.drawable.androidheight); bitmap2 = BitmapFactory.decodeResource(getResources(), R.drawable.androidwidth); } public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) { x = getWidth()/2; y = getHeight()/2; onValueChanged(new float[3]); } public void surfaceCreated(SurfaceHolder holder) { } public void surfaceDestroyed(SurfaceHolder holder) { } @SuppressWarnings("static-access") void onValueChanged(float[] values) { Canvas canvas = getHolder().lockCanvas(); if (canvas != null) { Paint paint = new Paint(); paint.setAntiAlias(true); paint.setColor(Color.BLUE); paint.setTextSize(24); canvas.drawColor(Color.WHITE); canvas.save(); Matrix matrix = new Matrix(); curWidth = (int) (bitmap.getWidth()* 1); curHeight = (int) (bitmap.getHeight()* 1); curBitmap = bitmap.createScaledBitmap(bitmap, curWidth, curHeight, false); matrix.setRotate(-values[0], x , y ); canvas.setMatrix(matrix); canvas.drawBitmap(curBitmap, x-curWidth/2, y-curHeight/2, null); matrix.setRotate(values[1], x-x1 , y+y1 ); canvas.setMatrix(matrix); canvas.drawBitmap(bitmap1, x-x1-bitmap1.getWidth()/2, y+y1-bitmap1.getHeight()/2, null); matrix.setRotate(-values[2], x+x1 , y+y1 ); canvas.setMatrix(matrix); canvas.drawBitmap(bitmap2, x+x1-bitmap2.getWidth()/2, y+y1-bitmap2.getHeight()/2, null); canvas.restore(); for (int i = 0; i < values.length; i++) { canvas.drawText(orientation[i] + ": " + values[i], 0, paint.getTextSize() * (i + 1), paint); } getHolder().unlockCanvasAndPost(canvas); } } } }