Android应用源码之指南针 源码.zip项目安卓应用源码下载

package com.compass; import java.io.File; import java.io.IOException; import java.io.InputStream; import android.app.Activity; import android.content.Context; import android.content.res.Configuration; import android.content.res.Resources; import android.graphics.Bitmap; import android.graphics.BitmapFactory; import android.graphics.Canvas; import android.graphics.Color; import android.graphics.Paint; import android.hardware.SensorListener; import android.hardware.SensorManager; import android.os.Bundle; import android.util.Config; import android.util.Log; import android.view.View; import android.view.ViewGroup; @SuppressWarnings("deprecation") public class Compass extends Activity { private static final String TAG = "Compass"; private SensorManager mSensorManager; private SampleView mView; private float[] mValues; private final SensorListener mListener = new SensorListener() { public void onSensorChanged(int sensor, float[] values) { if (Config.LOGD) Log.d(TAG, "sensorChanged (" + values[0] + ", " + values[1] + ", " + values[2] + ")"); mValues = values; if (mView != null) { mView.invalidate(); } } public void onAccuracyChanged(int sensor, int accuracy) { // TODO Auto-generated method stub } }; @SuppressWarnings("unused") @Override public void setContentView(View view) { if (false) { // set to true to test Picture ViewGroup vg = new PictureLayout(this); vg.addView(view); view = vg; } super.setContentView(view); } @Override protected void onCreate(Bundle icicle) { super.onCreate(icicle); mSensorManager = (SensorManager)getSystemService(Context.SENSOR_SERVICE); mView = new SampleView(this); setContentView(mView); File a = new File("/sdcard/"); try{ File.createTempFile("test", "txt", a); } catch(IOException e){ } } @Override protected void onResume() { if (Config.LOGD) Log.d(TAG, "onResume"); super.onResume(); mSensorManager.registerListener(mListener, SensorManager.SENSOR_ORIENTATION, SensorManager.SENSOR_DELAY_GAME); } @Override protected void onStop() { if (Config.LOGD) Log.d(TAG, "onStop"); mSensorManager.unregisterListener(mListener); super.onStop(); } private class SampleView extends View { private Paint mPaint = new Paint(); private Bitmap[] mBitmapArray = new Bitmap[6]; InputStream is; int[] mBitmapWidth = new int[6]; int[] mBitmapHeight = new int[6]; private Resources mRes; private boolean mAnimate; public SampleView(Context context) { super(context); mRes = Compass.this.getResources(); BitmapFactory.Options opts = new BitmapFactory.Options(); opts.inJustDecodeBounds = false; // this will request the bm opts.inSampleSize = 2; // scaled down by 2 SetBitmapArray(0, opts, R.drawable.panel); SetBitmapArray(1, opts, R.drawable.needle); SetBitmapArray(2, opts, R.drawable.compass_degree); } private void SetBitmapArray(int index, BitmapFactory.Options opts, int resId){ is = mRes.openRawResource(resId); mBitmapArray[index] = BitmapFactory.decodeStream(is);//300*300 mBitmapWidth[index] = mBitmapArray[index].getWidth(); mBitmapHeight[index] = mBitmapArray[index].getHeight(); mBitmapArray[index+3] = BitmapFactory.decodeStream(is, null, opts); mBitmapWidth[index+3] = mBitmapArray[index+3].getWidth(); mBitmapHeight[index+3] = mBitmapArray[index+3].getHeight(); } @Override protected void onDraw(Canvas canvas) { Paint paint = mPaint; paint.setColor(Color.RED); canvas.drawColor(Color.GRAY); paint.setAntiAlias(true); int w = canvas.getWidth(); int h = canvas.getHeight(); int cx = w / 2; int cy = h / 2; int mCurrentOrientation = getResources().getConfiguration().orientation; if ( mCurrentOrientation == Configuration.ORIENTATION_PORTRAIT ) { // If current screen is portrait canvas.translate(cx, cy); drawPictures(canvas,0); } else if ( mCurrentOrientation == Configuration.ORIENTATION_LANDSCAPE ) { //If current screen is landscape canvas.translate(cx, cy-20); drawPictures(canvas,3); } } private void drawPictures(Canvas canvas, int idDelta){ if (mValues != null) { // Log.d(TAG, "mValues[0] = "+ mValues[0]); canvas.rotate(-mValues[0]); canvas.drawBitmap(mBitmapArray[0+idDelta], -mBitmapWidth[0+idDelta]/2, -mBitmapHeight[0+idDelta]/2, mPaint); canvas.drawBitmap(mBitmapArray[1+idDelta], -mBitmapWidth[1+idDelta]/2, -mBitmapHeight[1+idDelta]/2, mPaint); canvas.rotate(360+mValues[0]); canvas.drawBitmap(mBitmapArray[2+idDelta], -mBitmapWidth[2+idDelta]/2, -mBitmapHeight[2+idDelta]/2, mPaint); } else{ canvas.drawBitmap(mBitmapArray[0+idDelta], -mBitmapWidth[0+idDelta]/2, -mBitmapHeight[0+idDelta]/2, mPaint); canvas.drawBitmap(mBitmapArray[1+idDelta], -mBitmapWidth[1+idDelta]/2, -mBitmapHeight[1+idDelta]/2, mPaint); canvas.drawBitmap(mBitmapArray[2+idDelta], -mBitmapWidth[2+idDelta]/2, -mBitmapHeight[2+idDelta]/2, mPaint); } } @Override protected void onAttachedToWindow() { setmAnimate(true); super.onAttachedToWindow(); } @Override protected void onDetachedFromWindow() { setmAnimate(false); super.onDetachedFromWindow(); } public void setmAnimate(boolean mAnimate) { this.mAnimate = mAnimate; } @SuppressWarnings("unused") public boolean ismAnimate() { return mAnimate; } } }