大家好请帮助我在每次旋转时旋转拨号器15度。下面我提供完整的代码。如果需要，我也可以提供我真正需要的图像。请尽快恢复。
public class Learning extends Activity {
public static Bitmap imageOriginal, imageScaled;
public static Matrix matrix;
private int current = 0;
private int previous = 0;
private int tempCount = 0;
public int dialerHeight, dialerWidth;
public GestureDetector detector;
public boolean[] quadrantTouched;
public boolean allowRotating;
public ImageView imageTop;
public ImageView imageBottom;
public ImageView dialer;
public ImageView stackChange;
public Button amphibian;
public Button birds;
public Button fish;
public Button invertebrates;
public Button mammals;
public Button repitiles;
public Button fruits;
public Button vegitables;
private ScrollView sV;
private ImageView homeButton;
public ArrayList<Button> callingOne = new ArrayList<Button>();
public int number = 0;
public int tempNumber = 0;
public int startingAngle;
public int endAngle;
public TextView diaText;
double currentAngle;
public String[] alpha = { "A", "B", "C", "D", "E", "F", "G", "H", "I", "J",
"K", "L", "M", "N", "O", "P", "Q", "R", "S", "T", "U", "V", "W",
"X", "Y", "Z" };
public HorizontalScrollView horizontalItem;
DisplayMetrics dp = null;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.learn);
horizontalItem = (HorizontalScrollView) findViewById(R.id.horizontalScrollView1);
horizontalItem.smoothScrollTo(0, 50);
sV = (ScrollView) findViewById(R.id.vScrool);
diaText = (TextView) findViewById(R.id.dialerText);
amphibian = (Button) findViewById(R.id.btnForg);
birds = (Button) findViewById(R.id.btncroco);
fish = (Button) findViewById(R.id.btnReptile);
invertebrates = (Button) findViewById(R.id.btnInvertebrate);
mammals = (Button) findViewById(R.id.btnFrg);
repitiles = (Button) findViewById(R.id.btnMammal);
fruits = (Button) findViewById(R.id.btnFish);
vegitables = (Button) findViewById(R.id.btnSawan);
homeButton = (ImageView) findViewById(R.id.imageView1);
homeButton.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
Animation slide = AnimationUtils.loadAnimation(
getApplicationContext(), R.anim.slide_up);
sV.startAnimation(slide);
}
});
callingOne.add(0, amphibian);
callingOne.add(1, birds);
callingOne.add(2, fish);
callingOne.add(3, invertebrates);
callingOne.add(4, mammals);
callingOne.add(5, repitiles);
callingOne.add(6, fruits);
callingOne.add(7, vegitables);
if (imageOriginal == null) {
imageOriginal = BitmapFactory.decodeResource(getResources(),
R.drawable.dial_letters);
}
if (matrix == null) {
matrix = new Matrix();
} else {
matrix.reset();
}
detector = new GestureDetector(this, new MyGestureDetector());
quadrantTouched = new boolean[] { false, false, false, false, false };
allowRotating = true;
amphibian.setOnTouchListener(new OnTouchListener() {
@Override
public boolean onTouch(View v, MotionEvent event) {
// TODO Auto-generated method stub
if (event.getAction() == android.view.MotionEvent.ACTION_DOWN) {
sV.setVisibility(View.VISIBLE);
Animation slide = AnimationUtils.loadAnimation(
getApplicationContext(), R.anim.slide_down);
sV.startAnimation(slide);
checkFocusable(0);
} else if (event.getAction() == android.view.MotionEvent.ACTION_UP) {
}
return false;
}
});
birds.setOnTouchListener(new OnTouchListener() {
@Override
public boolean onTouch(View v, MotionEvent event) {
// TODO Auto-generated method stub
if (event.getAction() == android.view.MotionEvent.ACTION_DOWN) {
// new AnimationUtils();
sV.setVisibility(View.VISIBLE);
Animation slide = AnimationUtils.loadAnimation(
getApplicationContext(), R.anim.slide_down);
sV.startAnimation(slide);
checkFocusable(1);
} else if (event.getAction() == android.view.MotionEvent.ACTION_UP) {
}
return false;
}
});
fish.setOnTouchListener(new OnTouchListener() {
@Override
public boolean onTouch(View v, MotionEvent event) {
// TODO Auto-generated method stub
if (event.getAction() == android.view.MotionEvent.ACTION_DOWN) {
// new AnimationUtils();
// fish.startAnimation(AnimationUtils.loadAnimation(getApplicationContext(),
// R.anim.zoom_enter));
// System.out.println(horizontalItem.getId());
sV.setVisibility(View.VISIBLE);
Animation slide = AnimationUtils.loadAnimation(
getApplicationContext(), R.anim.slide_down);
sV.startAnimation(slide);
checkFocusable(2);
} else if (event.getAction() == android.view.MotionEvent.ACTION_UP) {
}
return false;
}
});
invertebrates.setOnTouchListener(new OnTouchListener() {
@Override
public boolean onTouch(View v, MotionEvent event) {
// TODO Auto-generated method stub
if (event.getAction() == android.view.MotionEvent.ACTION_DOWN) {
// new AnimationUtils();
// invertebrates.startAnimation(AnimationUtils.loadAnimation(getApplicationContext(),
// R.anim.zoom_enter));
sV.setVisibility(View.VISIBLE);
Animation slide = AnimationUtils.loadAnimation(
getApplicationContext(), R.anim.slide_down);
sV.startAnimation(slide);
checkFocusable(3);
} else if (event.getAction() == android.view.MotionEvent.ACTION_UP) {
}
return false;
}
});
mammals.setOnTouchListener(new OnTouchListener() {
@Override
public boolean onTouch(View v, MotionEvent event) {
// TODO Auto-generated method stub
if (event.getAction() == android.view.MotionEvent.ACTION_DOWN) {
// new AnimationUtils();
// mammals.startAnimation(AnimationUtils.loadAnimation(getApplicationContext(),
// R.anim.zoom_enter));
sV.setVisibility(View.VISIBLE);
Animation slide = AnimationUtils.loadAnimation(
getApplicationContext(), R.anim.slide_down);
sV.startAnimation(slide);
checkFocusable(4);
} else if (event.getAction() == android.view.MotionEvent.ACTION_UP) {
}
return false;
}
});
repitiles.setOnTouchListener(new OnTouchListener() {
@Override
public boolean onTouch(View v, MotionEvent event) {
// TODO Auto-generated method stub
if (event.getAction() == android.view.MotionEvent.ACTION_DOWN) {
// new AnimationUtils();
// repitiles.startAnimation(AnimationUtils.loadAnimation(getApplicationContext(),
// R.anim.zoom_enter));
sV.setVisibility(View.VISIBLE);
Animation slide = AnimationUtils.loadAnimation(
getApplicationContext(), R.anim.slide_down);
sV.startAnimation(slide);
checkFocusable(5);
} else if (event.getAction() == android.view.MotionEvent.ACTION_UP) {
}
return false;
}
});
fruits.setOnTouchListener(new OnTouchListener() {
@Override
public boolean onTouch(View v, MotionEvent event) {
// TODO Auto-generated method stub
if (event.getAction() == android.view.MotionEvent.ACTION_DOWN) {
// new AnimationUtils();
// fruits.startAnimation(AnimationUtils.loadAnimation(getApplicationContext(),
// R.anim.zoom_enter));
sV.setVisibility(View.VISIBLE);
Animation slide = AnimationUtils.loadAnimation(
getApplicationContext(), R.anim.slide_down);
sV.startAnimation(slide);
checkFocusable(6);
} else if (event.getAction() == android.view.MotionEvent.ACTION_UP) {
}
return false;
}
});
vegitables.setOnTouchListener(new OnTouchListener() {
@Override
public boolean onTouch(View v, MotionEvent event) {
// TODO Auto-generated method stub
if (event.getAction() == android.view.MotionEvent.ACTION_DOWN) {
// new AnimationUtils();
// vegitables.startAnimation(AnimationUtils.loadAnimation(getApplicationContext(),
// R.anim.zoom_enter));
sV.setVisibility(View.VISIBLE);
Animation slide = AnimationUtils.loadAnimation(
getApplicationContext(), R.anim.slide_down);
sV.startAnimation(slide);
checkFocusable(7);
} else if (event.getAction() == android.view.MotionEvent.ACTION_UP) {
}
return false;
}
});
dialer = (ImageView) findViewById(R.id.idRing);
dialer.setOnTouchListener(new MyOnTouchListener());
dialer.getViewTreeObserver().addOnGlobalLayoutListener(
new OnGlobalLayoutListener() {
@Override
public void onGlobalLayout() {
if (dialerHeight == 0 || dialerWidth == 0) {
dialerHeight = dialer.getHeight();
dialerWidth = dialer.getWidth();
Matrix resize = new Matrix();
resize.postScale(
(float) Math.min(dialerWidth, dialerHeight)
/ (float) imageOriginal.getWidth(),
(float) Math.min(dialerWidth, dialerHeight)
/ (float) imageOriginal.getHeight());
imageScaled = Bitmap.createBitmap(imageOriginal, 0,
0, imageOriginal.getWidth(),
imageOriginal.getHeight(), resize, false);
float translateX = dialerWidth / 2
- imageScaled.getWidth() / 2;
float translateY = dialerHeight / 2
- imageScaled.getHeight() / 2;
matrix.postTranslate(translateX, translateY);
dialer.setImageBitmap(imageScaled);
dialer.setImageMatrix(matrix);
}
}
});
imageTop = (ImageView) findViewById(R.id.imgTop);
imageBottom = (ImageView) findViewById(R.id.imageBottom);
imageTop.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
// TODO Auto-generated method stub
horizontalItem.setVisibility(View.GONE);
imageBottom.setVisibility(View.VISIBLE);
// sv.setVisibility(View.GONE);
imageTop.setVisibility(View.GONE);
}
});
imageBottom.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
horizontalItem.setVisibility(View.VISIBLE);
imageBottom.setVisibility(View.GONE);
imageTop.setVisibility(View.VISIBLE);
// sv.setVisibility(View.VISIBLE);
}
});
}
private void checkFocusable(int id) {
if (tempCount == 0) {
current = id;
previous = current;
tempCount++;
} else {
previous = current;
current = id;
}
Animation scaling_zoom_in = AnimationUtils.loadAnimation(
getApplicationContext(), R.anim.zoom_enter);
scaling_zoom_in.setFillAfter(true);
Animation scaling_zoom_out = AnimationUtils.loadAnimation(
getApplicationContext(), R.anim.zoom_out);
scaling_zoom_out.setFillAfter(true);
System.out.println("Current : " + current);
System.out.println("Previous : " + previous);
if (current != previous) {
callingOne.get(current).startAnimation(scaling_zoom_in);
callingOne.get(previous).startAnimation(scaling_zoom_out);
} else {
callingOne.get(current).startAnimation(scaling_zoom_in);
}
}
private void rotateDialer(float degrees) {
// System.out.println("Degree : "+degrees);
matrix.postRotate(degrees, dialerWidth / 2, dialerHeight / 2);
dialer.setImageMatrix(matrix);
}
/**
* @return The angle of the unit circle with the image view's center
*/
private double getAngle(double xTouch, double yTouch) {
double x = xTouch - (dialerWidth / 2d);
double y = dialerHeight - yTouch - (dialerHeight / 2d);
switch (getQuadrant(x, y)) {
case 1:
return Math.asin(y / Math.hypot(x, y)) * 180 / Math.PI;
case 2:
case 3:
return 180 - (Math.asin(y / Math.hypot(x, y)) * 180 / Math.PI);
case 4:
return 360 + Math.asin(y / Math.hypot(x, y)) * 180 / Math.PI;
default:
// ignore, does not happen
return 0;
}
}
/**
* @return The selected quadrant.
*/
private static int getQuadrant(double x, double y) {
if (x >= 0) {
return y >= 0 ? 1 : 4;
} else {
return y >= 0 ? 2 : 3;
}
}
/**
* Simple implementation of an {@link OnTouchListener} for registering the
* dialer's touch events.
*/
private class MyOnTouchListener implements OnTouchListener {
private double startAngle;
@Override
public boolean onTouch(View v, MotionEvent event) {
float currentX = event.getX();
float currentY = event.getY();
switch (event.getAction()) {
case MotionEvent.ACTION_DOWN:
for (int i = 0; i < quadrantTouched.length; i++) {
quadrantTouched[i] = false;
}
allowRotating = true;
startAngle = getAngle(currentX, currentY);
startingAngle = (int) Math.abs(startAngle);
System.out.println("Starting Angle : " + startingAngle);
break;
case MotionEvent.ACTION_MOVE:
currentAngle = getAngle(currentX, currentY);
endAngle = (int) Math.abs(currentAngle);
rotateDialer((float) (Math.abs(startAngle - currentAngle)) / 20);
startAngle = currentAngle;
break;
case MotionEvent.ACTION_UP:
if (startingAngle != endAngle) {
number++;
}
if (number == 7) {
diaText.setText(alpha[tempNumber]);
tempNumber++;
number = 0;
}
if (tempNumber == 0) {
diaText.setText(alpha[tempNumber]);
tempNumber++;
}
if (tempNumber > 25) {
tempNumber = 0;
}
System.out.println("Current Angle : " + startAngle);
allowRotating = false;
break;
}
// set the touched quadrant to true
quadrantTouched[getQuadrant(event.getX() - (dialerWidth / 2),
dialerHeight - event.getY() - (dialerHeight / 2))] = true;
detector.onTouchEvent(event);
return true;
}
}
/**
* Simple implementation of a {@link SimpleOnGestureListener} for detecting
* a fling event.
*/
private class MyGestureDetector extends SimpleOnGestureListener {
@Override
public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX,
float velocityY) {
// get the quadrant of the start and the end of the fling
int q1 = getQuadrant(e1.getX() - (dialerWidth / 2), dialerHeight
- e1.getY() - (dialerHeight / 2));
int q2 = getQuadrant(e2.getX() - (dialerWidth / 2), dialerHeight
- e2.getY() - (dialerHeight / 2));
// the inversed rotations
if ((q1 == 2 && q2 == 2 && Math.abs(velocityX) < Math
.abs(velocityY))
|| (q1 == 3 && q2 == 3)
|| (q1 == 1 && q2 == 3)
|| (q1 == 4 && q2 == 4 && Math.abs(velocityX) > Math
.abs(velocityY))
|| ((q1 == 2 && q2 == 3) || (q1 == 3 && q2 == 2))
|| ((q1 == 3 && q2 == 4) || (q1 == 4 && q2 == 3))
|| (q1 == 2 && q2 == 4 && quadrantTouched[3])
|| (q1 == 4 && q2 == 2 && quadrantTouched[3])) {
dialer.post(new FlingRunnable(-1 * (velocityX + velocityY)));
} else {
// the normal rotation
System.out.println("Velocity : "+(velocityX + velocityY));
dialer.post(new FlingRunnable(velocityX + velocityY));
}
return true;
}
}
/**
* A {@link Runnable} for animating the the dialer's fling.
*/
private class FlingRunnable implements Runnable {
private float velocity;
public FlingRunnable(float velocity) {
this.velocity = velocity;
}
@Override
public void run() {
if (Math.abs(velocity) > 5 && allowRotating) {
rotateDialer(velocity / 75);
velocity = 1.0666F;
// post this instance again
dialer.post(this);
}
}
}
@Override
public void onBackPressed() {
// TODO Auto-generated method stub
super.onBackPressed();
Intent home = new Intent(Learning.this, MainActivity.class);
home.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
startActivity(home);
}
@Override
protected void onDestroy() {
// TODO Auto-generated method stub
super.onDestroy();
finish();
}
}