我在寻呼机中进行多个imageview，并在其上进行缩放功能。但如果我在寻呼机上的imageview上保持缩放功能比在zoom.so上切割位图，那么如何在没有剪切的情况下在imageview中显示整个缩放位图。我在寻呼机中使用Mike Ortiz的TouchImageView进行缩放。谢谢。
答案 0 :(得分：5)
MainActivity
public class MainActivity extends Activity {
private AwesomePagerAdapter awesomeAdapter;
public static NonSwipeableViewPager awesomePager;
RelativeLayout v;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
awesomeAdapter = new AwesomePagerAdapter();
awesomePager = (NonSwipeableViewPager) findViewById(R.id.awesomepager);
awesomePager.setAdapter(awesomeAdapter);
}
public class AwesomePagerAdapter extends PagerAdapter{
private int NUM_VIEWS =2;
@Override
public int getCount() {
return NUM_VIEWS ;
}
@Override
public Object instantiateItem(View container, int position) {
if(position == 0){
TouchImageView.b = true;
LayoutInflater inflater = (LayoutInflater)getSystemService(LAYOUT_INFLATER_SERVICE);
v = (RelativeLayout) inflater.inflate(R.layout.item_gallery_image, null);
TouchImageView tm = (TouchImageView) v.findViewById(R.id.image);
Bitmap bm = BitmapFactory.decodeResource(getResources(),
R.drawable.swami);
tm.setImageBitmap(bm);
((ViewPager) container).addView(v, 0);
}else if(position == 1){
TouchImageView.b = true;
LayoutInflater inflater = (LayoutInflater)getSystemService(LAYOUT_INFLATER_SERVICE);
v = (RelativeLayout) inflater.inflate(R.layout.item_gallery_image, null);
TouchImageView tm = (TouchImageView) v.findViewById(R.id.image);
Bitmap bm = BitmapFactory.decodeResource(getResources(),
R.drawable.swami);
tm.setImageBitmap(bm);
((ViewPager) container).addView(v, 0);
}
return v;
}
@Override
public void destroyItem(View container, int position, Object view) {
View v = (View) view;
((ViewPager) container).removeView(v);
TouchImageView.b = true;
}
@Override
public boolean isViewFromObject(View view, Object object) {
return view == ((View) object);
}
}
}
刷卡
public class NonSwipeableViewPager extends ViewPager {
private boolean enabled = true;
public NonSwipeableViewPager(Context context, AttributeSet attrs) {
super(context, attrs);
}
@Override
public boolean onTouchEvent(MotionEvent event) {
if (TouchImageView.b) {
return super.onTouchEvent(event);
}
return false;
}
@Override
public boolean onInterceptTouchEvent(MotionEvent event) {
if (TouchImageView.b) {
try {
enabled = super.onInterceptTouchEvent(event);
} catch (Exception e) {
}
return enabled;
}
return false;
}
public void setPagingEnabled(boolean enabled) {
this.enabled = enabled;
}
}
TouchImageView
public class TouchImageView extends ImageView {
Matrix matrix = new Matrix();
// We can be in one of these 3 states
static final int NONE = 0;
static final int DRAG = 1;
static final int ZOOM = 2;
int mode = NONE;
static NonSwipeableViewPager PagerLeft;
// Remember some things for zooming
PointF last = new PointF();
PointF start = new PointF();
float minScale = 1f;
float maxScale = 3f;
float[] m;
static boolean b =false, c= false;
float redundantXSpace, redundantYSpace;
float width, height;
static final int CLICK = 3;
float saveScale = 1f;
float right, bottom, origWidth, origHeight, bmWidth, bmHeight;
ScaleGestureDetector mScaleDetector;
Context context;
ViewGroup vp;
public TouchImageView(Context context) {
super(context);
sharedConstructing(context);
}
public TouchImageView(Context context, AttributeSet attrs) {
super(context, attrs);
sharedConstructing(context);
}
public void setChild(ViewGroup vp) {
this.vp = vp;
}
private void sharedConstructing(Context context) {
super.setClickable(true);
this.context = context;
mScaleDetector = new ScaleGestureDetector(context, new ScaleListener());
matrix.setTranslate(1f, 1f);
m = new float[9];
setImageMatrix(matrix);
setScaleType(ScaleType.MATRIX);
setOnTouchListener(new OnTouchListener() {
@Override
public boolean onTouch(View v, MotionEvent event) {
mScaleDetector.onTouchEvent(event);
matrix.getValues(m);
float x = m[Matrix.MTRANS_X];
float y = m[Matrix.MTRANS_Y];
/*Log.v("log_tag", event.getX()+" matrix "
+ x);*/
PointF curr = new PointF(event.getX(), event.getY());
switch (event.getAction()) {
case MotionEvent.ACTION_DOWN:
TouchImageView.b = false;
Log.v("event","ACTION_DOWN");
last.set(event.getX(), event.getY());
start.set(last);
mode = DRAG;
break;
case MotionEvent.ACTION_MOVE:
if (mode == DRAG) {
float deltaX = curr.x - last.x;
float deltaY = curr.y - last.y;
float scaleWidth = Math.round(origWidth * saveScale);
float scaleHeight = Math.round(origHeight * saveScale);
if (scaleWidth < width) {
deltaX = 0;
if (y + deltaY > 0){
TouchImageView.b = true;
Log.v("event","ACTION_MOVE scaleWidth < width y + deltaY > 0");
deltaY = -y;
}
else if (y + deltaY < -bottom){
TouchImageView.b = false;
Log.v("event","else ACTION_MOVE scaleWidth < width y + deltaY < -bottom");
deltaY = -(y + bottom);
}else{
TouchImageView.b = false;
}
} else if (scaleHeight < height) {
deltaY = 0;
if (x + deltaX > 0){
TouchImageView.b = true;
Log.v("event","ACTION_MOVE scaleWidth < height x + deltaX > 0");
deltaX = -x;
}
else if (x + deltaX < -right){
TouchImageView.b = true;
Log.v("event","ACTION_MOVE scaleWidth < height x + deltaX < -right");
deltaX = -(x + right);
}else{
TouchImageView.b = false;
}
}else {
if (x + deltaX > 0){
TouchImageView.b = true;
Log.v("event","scaleWidth > width");
deltaX = -x;
}
else if (x + deltaX < -right){
TouchImageView.b = true;
Log.v("event","else scaleWidth > width");
deltaX = -(x + right);
}
else{
TouchImageView.b = true;
}
if (y + deltaY > 0){
TouchImageView.b = true;
Log.v("event","y + deltaY");
deltaY = -y;
}
else if (y + deltaY < -bottom){
TouchImageView.b = true;
Log.v("event","y + deltaY < -bottom");
deltaY = -(y + bottom);
}else{
TouchImageView.b = false;
}
}
/*Log.v("log_tag",height + " matrix "
+ (int) getHeightFromMatrix(matrix, TouchImageView.this));*/
matrix.postTranslate(deltaX, deltaY);
last.set(curr.x, curr.y);
}
break;
case MotionEvent.ACTION_UP:
Log.v("event","ACTION_UP");
TouchImageView.b = true;
mode = NONE;
int xDiff = (int) Math.abs(curr.x - start.x);
int yDiff = (int) Math.abs(curr.y - start.y);
if (xDiff < CLICK && yDiff < CLICK){
Log.v("event","ACTION_UP xDiff < CLICK && yDiff < CLICK");
performClick();
}
break;
case MotionEvent.ACTION_POINTER_UP:
//TouchImageView.b = false;
Log.v("event","ACTION_POINTER_UP");
mode = NONE;
break;
case MotionEvent.ACTION_POINTER_3_DOWN:
Log.v("event","ACTION_HOVER_MOVE");
break;
}
/*getLayoutParams().height = (int) getWidthFromMatrix(matrix,
TouchImageView.this);
getLayoutParams().width = (int) getHeightFromMatrix(matrix,
TouchImageView.this);*/
setImageMatrix(matrix);
invalidate();
return true;
}
});
}
@Override
public void setImageBitmap(Bitmap bm) {
super.setImageBitmap(bm);
if (bm != null) {
bmWidth = bm.getWidth();
bmHeight = bm.getHeight();
}
}
public void setMaxZoom(float x) {
maxScale = x;
}
private class ScaleListener extends
ScaleGestureDetector.SimpleOnScaleGestureListener {
@Override
public boolean onScaleBegin(ScaleGestureDetector detector) {
mode = ZOOM;
return true;
}
@SuppressLint("NewApi")
@TargetApi(8)
@Override
public boolean onScale(ScaleGestureDetector detector) {
float mScaleFactor = (float) Math.min(
Math.max(.95f, detector.getScaleFactor()), 1.05);
float origScale = saveScale;
saveScale *= mScaleFactor;
if (saveScale > maxScale) {
saveScale = maxScale;
mScaleFactor = maxScale / origScale;
} else if (saveScale < minScale) {
saveScale = minScale;
mScaleFactor = minScale / origScale;
}
right = width * saveScale - width
- (2 * redundantXSpace * saveScale);
bottom = height * saveScale - height
- (2 * redundantYSpace * saveScale);
if (origWidth * saveScale <= width
|| origHeight * saveScale <= height) {
matrix.postScale(mScaleFactor, mScaleFactor, width / 2,
height / 2);
if (mScaleFactor < 1) {
matrix.getValues(m);
float x = m[Matrix.MTRANS_X];
float y = m[Matrix.MTRANS_Y];
if (mScaleFactor < 1) {
if (Math.round(origWidth * saveScale) < width) {
if (y < -bottom)
matrix.postTranslate(0, -(y + bottom));
else if (y > 0)
matrix.postTranslate(0, -y);
} else {
if (x < -right)
matrix.postTranslate(-(x + right), 0);
else if (x > 0)
matrix.postTranslate(-x, 0);
}
}
}
} else {
matrix.postScale(mScaleFactor, mScaleFactor,
detector.getFocusX(), detector.getFocusY());
matrix.getValues(m);
float x = m[Matrix.MTRANS_X];
float y = m[Matrix.MTRANS_Y];
if (mScaleFactor < 1) {
if (x < -right)
matrix.postTranslate(-(x + right), 0);
else if (x > 0)
matrix.postTranslate(-x, 0);
if (y < -bottom)
matrix.postTranslate(0, -(y + bottom));
else if (y > 0)
matrix.postTranslate(0, -y);
}
}
return true;
}
}
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
super.onMeasure(widthMeasureSpec, heightMeasureSpec);
width = MeasureSpec.getSize(widthMeasureSpec);
height = MeasureSpec.getSize(heightMeasureSpec);
// Fit to screen.
float scale;
float scaleX = (float) width / (float) bmWidth;
float scaleY = (float) height / (float) bmHeight;
scale = Math.min(scaleX, scaleY);
matrix.setScale(scale, scale);
setImageMatrix(matrix);
saveScale = 1f;
// Center the image
redundantYSpace = (float) height - (scale * (float) bmHeight);
redundantXSpace = (float) width - (scale * (float) bmWidth);
redundantYSpace /= (float) 2;
redundantXSpace /= (float) 2;
matrix.postTranslate(redundantXSpace, redundantYSpace);
origWidth = width - 2 * redundantXSpace;
origHeight = height - 2 * redundantYSpace;
right = width * saveScale - width - (2 * redundantXSpace * saveScale);
bottom = height * saveScale - height
- (2 * redundantYSpace * saveScale);
setImageMatrix(matrix);
}
public static void setPager(NonSwipeableViewPager pagerLeft) {
PagerLeft = pagerLeft;
}
}
主
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:gravity="fill"
>
<com.example.swipegallery.NonSwipeableViewPager
android:id="@+id/awesomepager"
android:layout_width="fill_parent"
android:layout_height="match_parent" />
定制
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:gravity="fill"
>
<com.example.swipegallery.TouchImageView
android:id="@+id/image"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_centerInParent="true"
android:layout_gravity="center"
/>
</RelativeLayout>