Hai here is my full code...........
package com.motionsensor;
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.graphics.Paint.Style;
import android.hardware.Sensor;
import android.hardware.SensorEvent;
import android.hardware.SensorEventListener;
import android.hardware.SensorManager;
import android.os.Bundle;
import android.view.View;
import android.widget.TextView;
import android.widget.Toast;
public class MainActivity extends Activity {
TextView textviewAzimuth, textviewPitch, textviewRoll;
private static SensorManager mySensorManager;
private boolean sersorrunning;
float[] sensorVlaues = new float[3];
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
View v=new MoveArrow(this);
setContentView(v);
textviewAzimuth = (TextView)findViewById(R.id.textazimuth);
textviewPitch = (TextView)findViewById(R.id.textpitch);
textviewRoll = (TextView)findViewById(R.id.textroll);
mySensorManager =
(SensorManager)getSystemService(Context.SENSOR_SERVICE);
List<Sensor> mySensors =
mySensorManager.getSensorList(Sensor.TYPE_ORIENTATION);
if(mySensors.size() > 0){
mySensorManager.registerListener(mySensorEventListener,
mySensors.get(0), SensorManager.SENSOR_DELAY_NORMAL);
sersorrunning = true;
Toast.makeText(this, "Start ORIENTATION Sensor",
Toast.LENGTH_LONG).show();
}
else{
Toast.makeText(this, "No ORIENTATION Sensor",
Toast.LENGTH_LONG).show();
sersorrunning = false;
finish();
}
}
private SensorEventListener mySensorEventListener = new
SensorEventListener() {
@Override
public void onSensorChanged(SensorEvent event) {
sensorVlaues = event.values.clone();
MoveArrow.azimuth = String.valueOf(sensorVlaues[0]);
MoveArrow.pitch = String.valueOf(sensorVlaues[1]);
MoveArrow.roll = String.valueOf(sensorVlaues[2]);
MoveArrow.angle = -1*(int) sensorVlaues[2];
}
@Override
public void onAccuracyChanged(Sensor sensor, int accuracy) {
// TODO Auto-generated method stub
}
};
@Override
protected void onDestroy() {
// TODO Auto-generated method stub
super.onDestroy();
if(sersorrunning){
mySensorManager.unregisterListener(mySensorEventListener);
Toast.makeText(MainActivity.this, "unregisterListener",
Toast.LENGTH_SHORT).show();
}
}
}
class MoveArrow extends View {
int screenW;
int screenH;
static int X;
static int Y;
int initialY ;
int arrowW;
int arrowH;
int dX_Prev =0;
int dY_Prev =0;
static int dX_Pres =0;
static int dY_Pres =0;
static int angle;
int dX =0;
int dY =0;
float acc;
Bitmap arrow, bgr;
static String azimuth="0";
static String pitch="0";
static String roll="0";
public MoveArrow(Context context) {
super(context);
arrow =
BitmapFactory.decodeResource(getResources(),R.drawable.arrow); //load a
arrow image
bgr =
BitmapFactory.decodeResource(getResources(),R.drawable.graph); //load a
background
arrowW = arrow.getWidth();
arrowH = arrow.getHeight();
acc = 0.2f; //acceleration
dY = 0; //vertical speed
initialY = 100; //Initial vertical position.
angle = 0; //Start value for rotation angle.
}
@Override
public void onSizeChanged (int w, int h, int oldw, int oldh) {
super.onSizeChanged(w, h, oldw, oldh);
screenW = w;
screenH = h;
bgr = Bitmap.createScaledBitmap(bgr, w, h, true); //Resize
background to fit the screen.
X = (int) (screenW /2) - (arrowW / 2) ; //Centre arrow into the
centre of the screen.
Y = initialY;
}
@Override
public void onDraw(Canvas canvas) {
super.onDraw(canvas);
Paint paint = new Paint();
paint.setColor(Color.BLACK);
paint.setStyle(Style.FILL);
paint.setTextSize(12);
paint.setColor(Color.BLUE);
//Draw background.
canvas.drawBitmap(bgr, 0, 0, null);
int newWidth = arrowW;
int newHeight = arrowH;
float scaleWidth = 1;
float scaleHeight = 1;
int centrex = arrowW/2;
int centrey = arrowH/2;
Matrix matrix = new Matrix();
matrix.postScale(scaleWidth, scaleHeight);
matrix.postRotate(angle, X+centrex , Y+centrey );
Bitmap resizedBitmap = Bitmap.createBitmap(arrow, 0, 0,
arrow.getWidth(), arrow.getHeight(), matrix, true);
canvas.save(Canvas.MATRIX_SAVE_FLAG);
canvas.rotate(angle, X + resizedBitmap.getWidth()/2, Y +
resizedBitmap.getHeight()/2);
super.dispatchDraw(canvas);
canvas.drawBitmap(resizedBitmap, X, Y, null); //Draw the arrow on
the rotated canvas.
canvas.restore();
invalidate();
}
}
And I am using an arrow image as my rotating image.....
On Thursday, 13 September 2012 10:44:35 UTC+5:30, Haris wrote:
>
> Hai bob thanks for reply.....
>
> I made the above change in my code but still the same result....And my
> image get distorted it's edges while rotation......
>
> On Wednesday, 12 September 2012 20:04:12 UTC+5:30, bob wrote:
>>
>> Well, for one thing, this is not right:
>>
>> canvas.rotate(angle, X + getWidth() >> 1, Y + getHeight() >> 1);
>>
>> You should be calling getWidth and getHeight on the bitmap.
>>
>> Something like this:
>>
>> canvas.rotate(angle, X + resizedBitmap.getWidth()/2, Y +
>> resizedBitmap.getHeight()/2);
>>
>>
>>
>> On Tuesday, September 11, 2012 12:54:59 AM UTC-5, HPP wrote:
>>>
>>> Hai thanks for the replys........
>>>
>>> I changed my code like
>>>
>>> matrix.postScale(scaleWidth, scaleHeight);
>>> matrix.postRotate(angle, X+centrex , Y+centrey );
>>> canvas.setMatrix(matrix);
>>>
>>> Bitmap resizedBitmap = Bitmap.createBitmap(arrow, 0, 0,
>>> arrow.getWidth(), arrow.getHeight(), matrix, true);
>>> canvas.save(Canvas.MATRIX_SAVE_FLAG);
>>> canvas.rotate(angle, *X + *getWidth() >> 1, *Y +* getHeight()
>>> >> 1);
>>> super.dispatchDraw(canvas);
>>> canvas.drawBitmap(resizedBitmap, X, Y, null); //Draw the arrow
>>> on the rotated canvas.
>>> canvas.restore();
>>>
>>> But still it's not rotating about the centre.......
>>>
>>>
>>>
>>> On Tuesday, 11 September 2012 01:49:30 UTC+5:30, bob wrote:
>>>>
>>>> canvas.save(Canvas.MATRIX_SAVE_FLAG);
>>>> canvas.rotate(angle, *X + *getWidth() >> 1, *Y +* getHeight() >> 1);
>>>> super.dispatchDraw(canvas);
>>>> canvas.restore();
>>>>
>>>> On Monday, September 10, 2012 2:22:15 PM UTC-5, lbendlin wrote:
>>>>>
>>>>> canvas.save(Canvas.MATRIX_SAVE_FLAG);
>>>>> canvas.rotate(angle, getWidth() >> 1, getHeight() >> 1);
>>>>> super.dispatchDraw(canvas);
>>>>> canvas.restore();
>>>>>
>>>>> On Monday, September 10, 2012 9:18:32 AM UTC-4, Haris wrote:
>>>>>>
>>>>>> Hai all
>>>>>>
>>>>>> I am trying an application like rotating image with motion
>>>>>> sensor....My problem is that the image does not rotate about centre
>>>>>> properly....And my angle range is 0 to 90 and 0 to -90..
>>>>>> And below is my code.....
>>>>>>
>>>>>> public void onDraw(Canvas canvas) {
>>>>>> super.onDraw(canvas);
>>>>>> Bitmap arrow =
>>>>>> BitmapFactory.decodeResource(getResources(),R.drawable.arrow);
>>>>>> int arrowW = arrow.getWidth();
>>>>>> int arrowH = arrow.getHeight();
>>>>>> float scaleWidth = 1;
>>>>>> float scaleHeight = 1;
>>>>>> int centrex = arrowW/2;
>>>>>> int centrey = arrowH/2;
>>>>>> int X=108;
>>>>>> int Y=100;
>>>>>> int angle=0;
>>>>>>
>>>>>> Matrix matrix = new Matrix();
>>>>>> matrix.postScale(scaleWidth, scaleHeight);
>>>>>>
>>>>>> matrix.postRotate(angle, X+centrex , Y+centrey );
>>>>>> Bitmap resizedBitmap = Bitmap.createBitmap(arrow, 0, 0,
>>>>>> arrow.getWidth(), arrow.getHeight(), matrix, true);
>>>>>> canvas.save();
>>>>>> canvas.drawBitmap(resizedBitmap, X, Y, null);
>>>>>> invalidate();
>>>>>> }
>>>>>>
>>>>>> I am getting the angle values from onCreate method.....Using
>>>>>> orientation sensor(roll values)..
>>>>>> But When I rotate the screen my image is rotating but not exactly
>>>>>> around the image centre.....
>>>>>>
>>>>>> Thanks......
>>>>>>
>>>>>
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