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author
uis
committed
add缩放动画
1 parent 86f97ba commit cfa0a19

1 file changed

Lines changed: 75 additions & 25 deletions

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‎stackviewlayout/src/main/java/com/uis/stackviewlayout/StackViewLayout.java‎

Lines changed: 75 additions & 25 deletions
Original file line numberDiff line numberDiff line change
@@ -4,7 +4,9 @@
44
import android.content.res.TypedArray;
55
import android.graphics.Color;
66
import android.util.AttributeSet;
7+
import android.util.DisplayMetrics;
78
import android.util.Log;
9+
import android.util.TypedValue;
810
import android.view.MotionEvent;
911
import android.view.VelocityTracker;
1012
import android.view.View;
@@ -32,9 +34,9 @@ public class StackViewLayout extends ViewGroup{
3234
private float aspectRatio = 0;
3335
private boolean autoPlay = true;
3436
private int stackModel = MODEL_RIGHT;
35-
private int edge = 0;
37+
private int edge = 10;
3638
private int paddingX = 10;
37-
private int offsetX = 0;
39+
private int offsetX = 2;
3840
private int paddingY = 10;
3941
private int offsetY = 2;
4042

@@ -53,6 +55,7 @@ public class StackViewLayout extends ViewGroup{
5355
private int dragModel;
5456
private boolean mIsDragged = false;
5557
private boolean mIsFling = false;
58+
private boolean continuePlay = false;
5659

5760
private List<Integer> xSpace = new ArrayList<>(stackSize);
5861
private List<Integer> ySpace = new ArrayList<>(stackSize);
@@ -80,11 +83,12 @@ public StackViewLayout(Context context, AttributeSet attrs, int defStyleAttr) {
8083
aspectRatio = type.getFloat(R.styleable.StackViewLayout_stackAspectRatio,aspectRatio);
8184
autoPlay = type.getBoolean(R.styleable.StackViewLayout_stackAutoPlay,autoPlay);
8285
stackModel = type.getInteger(R.styleable.StackViewLayout_stackModel,stackModel);
83-
edge = (int)type.getDimension(R.styleable.StackViewLayout_stackEdge,edge);
84-
paddingX = (int)type.getDimension(R.styleable.StackViewLayout_stackPaddingX,paddingX);
85-
offsetX = (int)type.getDimension(R.styleable.StackViewLayout_stackOffsetX,offsetX);
86-
paddingY = (int)type.getDimension(R.styleable.StackViewLayout_stackPaddingY,paddingY);
87-
offsetY = (int)type.getDimension(R.styleable.StackViewLayout_stackOffsetY,offsetY);
86+
DisplayMetrics metrics = getResources().getDisplayMetrics();
87+
edge = (int)type.getDimension(R.styleable.StackViewLayout_stackEdge,dp(edge,metrics));
88+
paddingX = (int)type.getDimension(R.styleable.StackViewLayout_stackPaddingX,dp(paddingX,metrics));
89+
offsetX = (int)type.getDimension(R.styleable.StackViewLayout_stackOffsetX,dp(offsetX,metrics));
90+
paddingY = (int)type.getDimension(R.styleable.StackViewLayout_stackPaddingY,dp(paddingY,metrics));
91+
offsetY = (int)type.getDimension(R.styleable.StackViewLayout_stackOffsetY,dp(offsetY,metrics));
8892
type.recycle();
8993

9094
boolean isLeft = MODEL_LEFT == stackModel;
@@ -120,6 +124,10 @@ public int getItemCount() {
120124
}
121125
}
122126

127+
private int dp(int dp,DisplayMetrics metrics){
128+
return (int)(TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP,dp,metrics)+0.5f);
129+
}
130+
123131
@Override
124132
protected void onAttachedToWindow() {
125133
super.onAttachedToWindow();
@@ -166,19 +174,19 @@ protected void onLayout(boolean changed, int l, int t, int r, int b) {
166174
private void layoutChildView(){
167175
int count = getChildCount();
168176
for(int i=0;i<count;i++){
169-
int left=getPaddingLeft(),right,top=getPaddingTop(),bottom;
177+
int left=getPaddingLeft(),right,top=0,bottom;
170178
View child = getChildAt(i);
171179
if(i==count-1){
172180
left += MODEL_LEFT == stackModel ? getMeasuredWidth():-childWidthMeasure;
173181
}else {
174182
int index = Math.max(0, i - 1);
175183
left += edge + xSpace.get(index);
176-
top += ySpace.get(index);
184+
top = ySpace.get(index);
177185
}
178-
bottom = childHeightMeasure - 2*top;
186+
bottom = childHeightMeasure - top;
179187
right = left + childWidthMeasure;
180-
181-
child.setScaleY(1.0f*(bottom-top)/childHeightMeasure);
188+
float scale = 1.0f*(bottom-top)/childHeightMeasure;
189+
child.setScaleY(scale);
182190
top = getPaddingTop();
183191
bottom = childHeightMeasure - top;
184192
child.layout(left,top,right,bottom);
@@ -217,26 +225,37 @@ public void computeScroll() {
217225
private void scrollDx(int dx){
218226
int x = dx*childWidthMeasure/getMeasuredWidth();
219227
int count = getChildCount();
220-
float ratio = 1.0f*x/childWidthMeasure;
221-
228+
float percent = 1f*getSign()*x/childWidthMeasure;
229+
percent = Math.max(-1f,Math.min(1f,percent));
222230
View child;
223231
int top = getPaddingTop();
224232
int left = getPaddingLeft();
225233
if( 0 == (dragModel&stackModel)){
226234
int i = count-2;
227-
// for(int k=0;k<i;k++){
228-
// getChildAt(i).setScaleY(1);
229-
// }
235+
for(int k=1;k<i;k++){
236+
float h = childHeightMeasure - 2*ySpace.get(k-1) + 2f*percent*(ySpace.get(k-1)-ySpace.get(k));
237+
float scale = h/childHeightMeasure;
238+
child = getChildAt(k);
239+
child.setScaleY(scale);
240+
int cleft = left+edge + xSpace.get(k-1) + (int)(percent*(xSpace.get(k)-xSpace.get(k-1)));
241+
child.layout(cleft,top,cleft + childWidthMeasure,childHeightMeasure-top);
242+
}
230243
child = getChildAt(i);
231244
left += edge+xSpace.get(i-1)+x;
232245
}else{
233246
int i = count-1;
247+
for(int k=2;k<i;k++){
248+
float h = childHeightMeasure - 2*ySpace.get(k-1) - 2f*percent*(ySpace.get(k-1)-ySpace.get(k-2));
249+
float scale = h/childHeightMeasure;
250+
child = getChildAt(k);
251+
child.setScaleY(scale);
252+
int cleft = left+edge + xSpace.get(k-1) - (int)(percent*(xSpace.get(k-2)-xSpace.get(k-1)));
253+
child.layout(cleft,top,cleft + childWidthMeasure,childHeightMeasure-top);
254+
}
234255
child = getChildAt(i);
235256
left += (MODEL_LEFT == stackModel?getMeasuredWidth():-childWidthMeasure)+x;
236257
}
237-
int right = left + childWidthMeasure;
238-
int bottom = childHeightMeasure-top;
239-
child.layout(left,top,right,bottom);
258+
child.layout(left,top,left + childWidthMeasure,childHeightMeasure-top);
240259
}
241260

242261
private void resetTouch(){
@@ -265,13 +284,13 @@ private void scrollVelocity(int velocity){
265284
sign = -getSign();
266285
}
267286
if(velocity*sign>getMeasuredWidth() || -dx*sign>0.3*childWidthMeasure){
268-
int dnx = dx+sign*(getMeasuredWidth()+edge);
287+
int dnx = dx+sign*(childWidthMeasure+edge)*getMeasuredWidth()/childWidthMeasure;
269288
startScroll(-dx,dnx);
270289
mIsFling = true;
271290
}else {
272291
startScroll(-dx, dx);
273292
}
274-
startAutoPlay();
293+
continuePlay = true;
275294
}
276295

277296
private void autoScroll(){
@@ -299,6 +318,10 @@ private void nextPage(){
299318
removeViewAt(0);
300319
}
301320
}
321+
if(continuePlay){
322+
continuePlay = false;
323+
startAutoPlay();
324+
}
302325
}
303326

304327
private void startScroll(int begin,int dx){
@@ -347,16 +370,43 @@ public void setAutoPlay(boolean autoPlay){
347370

348371
public void setAdapter(StackViewAdapter adapter) {
349372
this.adapter = adapter;
350-
requestLayout();
373+
notifyDataChanged();
374+
}
375+
376+
public void notifyDataChanged(){
377+
mScroller.abortAnimation();
378+
removeAllViews();
379+
}
380+
381+
public void setDurationTime(int duration,int delay){
382+
this.mDuration = duration;
383+
this.mDelay = delay;
384+
stopAutoPlay(false);
385+
startAutoPlay();
351386
}
352387

353388
public StackViewAdapter getAdapter(){
354389
return adapter;
355390
}
356391

392+
public void setCurrentItem(int item){
393+
if(adapter != null && adapter.getItemCount() > 0) {
394+
if (item < 0) {
395+
item = 0;
396+
} else if (item >= adapter.getItemCount()){
397+
item = adapter.getItemCount()-1;
398+
}
399+
if(current != item) {
400+
mScroller.abortAnimation();
401+
current = item;
402+
removeAllViews();
403+
}
404+
}
405+
}
406+
357407
@Override
358408
public boolean onInterceptTouchEvent(MotionEvent ev) {
359-
log(" action="+ev.getAction()+",x="+ev.getX()+",y="+ev.getY()+",slop="+mTouchSlop);
409+
//log(" action="+ev.getAction()+",x="+ev.getX()+",y="+ev.getY()+",slop="+mTouchSlop);
360410
if(adapter == null || adapter.getItemCount() <= 1){
361411
return false;
362412
}
@@ -389,7 +439,7 @@ public boolean onInterceptTouchEvent(MotionEvent ev) {
389439

390440
@Override
391441
public boolean onTouchEvent(MotionEvent ev) {
392-
log(" action="+ev.getAction()+",x="+ev.getX()+",y="+ev.getY());
442+
//log(" action="+ev.getAction()+",x="+ev.getX()+",y="+ev.getY());
393443
if(adapter == null || adapter.getItemCount() <= 1){
394444
return false;
395445
}

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