当我按下onClick时如何保存当前的ImageView？ 我当前遇到的问题是保存下一行的图像而不是当前的实际图像..
我的保存代码
public class MainActivity extends Activity implements SwipeView.OnCardSwipedListener {
// Declaring variables
private final static int CARDS_MAX_ELEMENTS = 5;
private FrameLayout contentLayout;
private SwipeView mSwipeView;
private View addCardc41;
private Firebase mRef;
public ImageView imageLogo;
public ImageView imageview;
private static final String TAG = "MyActivity";
// Creating array of meals, getting them from the drawable folder
private int[] meals = {
R.drawable.a,
R.drawable.b,
R.drawable.c,
R.drawable.d,
R.drawable.e,
R.drawable.f,
R.drawable.g,
R.drawable.h,
R.drawable.i,
R.drawable.j
};
// Declaring a counter for the next method
private int count = 0;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_swipe_view_demo);
contentLayout = (FrameLayout) findViewById(R.id.contentLayout);
imageLogo = (ImageView) findViewById(R.id.imageView3);
imageview = (ImageView) findViewById(R.id.imageView);
// Add the swipe view
mSwipeView = new SwipeView(this, R.id.imgSwipeLike, R.id.imgSwipeNope,
this);
contentLayout.addView(mSwipeView);
// Adding the cards initially with the maximum limits of cards.
for (int i = 0; i < CARDS_MAX_ELEMENTS; i++) {
addCard(i);
}
}
/**
* On clicked view.
*
* @param clickedView
* the clicked view
*/
public void onClickedView(View clickedView) {
switch (clickedView.getId()) {
case R.id.imgDisLike: {
mSwipeView.dislikeCard();
break;
}
case R.id.imgLike: {
mSwipeView.likeCard();
break;
}
}
}
@Override
public void onLikes() {
imageview.setDrawingCacheEnabled(true); //Add this line.
imageview.buildDrawingCache();
Bitmap bm=imageview.getDrawingCache();
OutputStream fOut = null;
Uri outputFileUri;
try {
File root = new File(Environment.getExternalStorageDirectory()
+ File.separator + "folder_name" + File.separator);
root.mkdirs();
File sdImageMainDirectory = new File(root, "myPicName.jpg");
outputFileUri = Uri.fromFile(sdImageMainDirectory);
fOut = new FileOutputStream(sdImageMainDirectory);
MediaScannerConnection.scanFile(this, new String[] { sdImageMainDirectory.getAbsolutePath() }, null, null);
} catch (Exception e) {
Toast.makeText(this, "Error occured. Please try again later.",
Toast.LENGTH_SHORT).show();
}
try {
bm.compress(Bitmap.CompressFormat.PNG, 100, fOut);
fOut.flush();
fOut.close();
} catch (Exception e){}
System.out.println("An Card removed");
// Add a card if you needed after any previous card swiped
addCard(0);
}
@Override
public void onDisLikes() {
System.out.println("An Card removed");
// Add a card if you needed after any previous card swiped
addCard(0);
}
@Override
public void onSingleTap() {
}
/**
* Adds the card to the swipe.
*/
private void addCard(int position) {
final View cardView = LayoutInflater.from(this).inflate(
R.layout.item_swipe_view, null);
final ImageView imgMeal = (ImageView) cardView
.findViewById(R.id.imgMeals);
imgMeal.setImageResource(meals[count]);
count++;
if (count == meals.length) {
count = 0;
}
// Add a card to the swipe view..
mSwipeView.addCard(cardView, position);
// Create OnClickListener for the CookBookActivity
// Declare Button for the Cookbook
Button btn = (Button) findViewById(R.id.button3);
btn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
startActivity(new Intent(MainActivity.this, CookbookActivity.class));
}
});
// Check Authentication
mRef = new Firebase(Constants.FIREBASE_URL);
if (mRef.getAuth() == null) {
loadLoginView();
}
}
private void loadLoginView() {
Intent intent = new Intent(this, LoginActivity.class);
intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TASK);
startActivity(intent);
}
}
我用于刷卡的图书馆
//
// credits to IntelliJ IDEA
// (powered by Fernflower decompiler)
package com.rk.lib.view;
import android.content.Context;
import android.os.Handler;
import android.os.Build.VERSION;
import android.view.GestureDetector;
import android.view.MotionEvent;
import android.view.View;
import android.view.GestureDetector.SimpleOnGestureListener;
import android.view.View.OnTouchListener;
import android.view.animation.AlphaAnimation;
import android.widget.FrameLayout;
import android.widget.LinearLayout;
import android.widget.FrameLayout.LayoutParams;
public class SwipeView extends FrameLayout {
private View mFocusedView;
private View mFocusedViewLike;
private View mFocusedViewNope;
private int mFocusedViewWidth;
private float mPreviousAlpha = 0.0F;
private Integer mLikeResource = Integer.valueOf(0);
private Integer mNopeResource = Integer.valueOf(0);
private static final int MAX_ELEMENTS = 3;
private static final long DELAY_SCROLL_RUNNABLE = 1L;
private static final int SCROLL_LENGTH = 5;
private int mScrolledPixelsX;
private int mScrolledPixelsY;
private int mNeedToScrollX;
private int mNeedToScrollY;
private int mTotalScrolledX;
private int mTotalScrolledY;
private int mScrollLengthX = 5;
private int mScrollLengthY = 5;
private boolean enableTouchSwipe = true;
private Context mContext;
private SwipeView.ScrollMode mScrollModeX;
private SwipeView.ScrollMode mScrollModeY;
private SwipeView.ScrollDirection mScrollDirection;
private int[] paddingX;
private int[] paddingYTop;
private int[] paddingYBottom;
private SwipeView.OnCardSwipedListener mOnCardSwipedListener;
private Handler mScrollHandler;
private Runnable mScrollRunnable;
private final SimpleOnGestureListener simpleOnGestureListener;
public SwipeView(Context context, Integer likeResource, Integer nopeResource, SwipeView.OnCardSwipedListener cardSwipeListener) {
super(context);
this.mScrollModeX = SwipeView.ScrollMode.NONE;
this.mScrollModeY = SwipeView.ScrollMode.NONE;
this.mScrollDirection = SwipeView.ScrollDirection.NONE;
this.paddingX = new int[]{0, 10, 20};
this.paddingYTop = new int[]{0, 10, 20};
this.paddingYBottom = new int[]{20, 10, 0};
this.mScrollHandler = new Handler();
this.mScrollRunnable = new Runnable() {
public void run() {
boolean scrollX;
boolean scrollY;
int scrollX1;
int scrollY1;
if(SwipeView.this.mScrollDirection == SwipeView.ScrollDirection.OUT) {
if(SwipeView.this.mNeedToScrollX <= 0 && SwipeView.this.mNeedToScrollY <= 0) {
SwipeView.this.mScrollHandler.removeCallbacks(SwipeView.this.mScrollRunnable);
SwipeView.this.removeView(SwipeView.this.mFocusedView);
if(SwipeView.this.mScrollModeX == SwipeView.ScrollMode.LEFT) {
SwipeView.this.mOnCardSwipedListener.onLikes();
} else if(SwipeView.this.mScrollModeX == SwipeView.ScrollMode.RIGHT) {
SwipeView.this.mOnCardSwipedListener.onDisLikes();
}
SwipeView.this.alignCardsPadding();
} else {
if(SwipeView.this.mNeedToScrollX < SwipeView.this.mScrollLengthX) {
SwipeView.this.mScrollLengthX = SwipeView.this.mNeedToScrollX;
SwipeView.this.mNeedToScrollX = 0;
} else {
SwipeView.this.mNeedToScrollX = SwipeView.this.mNeedToScrollX - SwipeView.this.mScrollLengthX;
}
if(SwipeView.this.mNeedToScrollY < SwipeView.this.mScrollLengthY) {
SwipeView.this.mScrollLengthY = SwipeView.this.mNeedToScrollY;
SwipeView.this.mNeedToScrollY = 0;
} else {
SwipeView.this.mNeedToScrollY = SwipeView.this.mNeedToScrollY - SwipeView.this.mScrollLengthY;
}
scrollX = false;
scrollY = false;
if(SwipeView.this.mScrollModeX == SwipeView.ScrollMode.LEFT) {
scrollX1 = -SwipeView.this.mScrollLengthX;
} else {
scrollX1 = SwipeView.this.mScrollLengthX;
}
if(SwipeView.this.mScrollModeY == SwipeView.ScrollMode.TOP) {
scrollY1 = -SwipeView.this.mScrollLengthY;
} else {
scrollY1 = SwipeView.this.mScrollLengthY;
}
SwipeView.this.mFocusedView.scrollBy(scrollX1, scrollY1);
SwipeView.this.mScrollHandler.postDelayed(SwipeView.this.mScrollRunnable, 1L);
}
} else if(SwipeView.this.mScrollDirection == SwipeView.ScrollDirection.IN) {
if(SwipeView.this.mTotalScrolledX <= 0 && SwipeView.this.mTotalScrolledY <= 0) {
SwipeView.this.mScrollHandler.removeCallbacks(SwipeView.this.mScrollRunnable);
SwipeView.this.mScrollDirection = SwipeView.ScrollDirection.NONE;
} else {
if(SwipeView.this.mTotalScrolledX < SwipeView.this.mScrollLengthX) {
SwipeView.this.mScrollLengthX = SwipeView.this.mTotalScrolledX;
SwipeView.this.mTotalScrolledX = 0;
} else {
SwipeView.this.mTotalScrolledX = SwipeView.this.mTotalScrolledX - SwipeView.this.mScrollLengthX;
}
if(SwipeView.this.mTotalScrolledY < SwipeView.this.mScrollLengthY) {
SwipeView.this.mScrollLengthY = SwipeView.this.mTotalScrolledY;
SwipeView.this.mTotalScrolledY = 0;
} else {
SwipeView.this.mTotalScrolledY = SwipeView.this.mTotalScrolledY - SwipeView.this.mScrollLengthY;
}
scrollX = false;
scrollY = false;
if(SwipeView.this.mScrollModeX == SwipeView.ScrollMode.LEFT) {
scrollX1 = SwipeView.this.mScrollLengthX;
} else {
scrollX1 = -SwipeView.this.mScrollLengthX;
}
if(SwipeView.this.mScrollModeY == SwipeView.ScrollMode.TOP) {
scrollY1 = -SwipeView.this.mScrollLengthY;
} else {
scrollY1 = SwipeView.this.mScrollLengthY;
}
SwipeView.this.mFocusedView.scrollBy(scrollX1, scrollY1);
SwipeView.this.mScrollHandler.postDelayed(SwipeView.this.mScrollRunnable, 1L);
}
}
}
};
this.simpleOnGestureListener = new SimpleOnGestureListener() {
public boolean onSingleTapConfirmed(MotionEvent e) {
SwipeView.this.mOnCardSwipedListener.onSingleTap();
return super.onSingleTapConfirmed(e);
}
public boolean onScroll(MotionEvent e1, MotionEvent e2, float distanceX, float distanceY) {
if(SwipeView.this.mFocusedView != null) {
SwipeView.this.mScrolledPixelsX = SwipeView.this.mScrolledPixelsX + (int)distanceX;
SwipeView.this.mScrolledPixelsY = SwipeView.this.mScrolledPixelsY + (int)distanceY;
SwipeView.this.mFocusedView.scrollBy((int)distanceX, (int)distanceY);
float alpha = (float)SwipeView.this.mScrolledPixelsX / (float)SwipeView.this.mFocusedViewWidth;
if(alpha > 0.0F) {
SwipeView.this.mFocusedViewNope.setVisibility(0);
SwipeView.this.mFocusedViewLike.setVisibility(8);
SwipeView.setAlpha(SwipeView.this.mFocusedViewNope, SwipeView.this.mPreviousAlpha, alpha);
SwipeView.this.mPreviousAlpha = alpha;
} else {
SwipeView.this.mFocusedViewNope.setVisibility(8);
SwipeView.this.mFocusedViewLike.setVisibility(0);
SwipeView.setAlpha(SwipeView.this.mFocusedViewLike, SwipeView.this.mPreviousAlpha, -alpha);
SwipeView.this.mPreviousAlpha = -alpha;
}
}
return true;
}
};
this.mContext = context;
this.mLikeResource = likeResource;
this.mNopeResource = nopeResource;
this.mOnCardSwipedListener = cardSwipeListener;
float density = this.getResources().getDisplayMetrics().density;
for(int gestureDetector = 0; gestureDetector < this.paddingX.length; ++gestureDetector) {
this.paddingX[gestureDetector] = (int)((float)this.paddingX[gestureDetector] * density);
this.paddingYTop[gestureDetector] = (int)((float)this.paddingYTop[gestureDetector] * density);
this.paddingYBottom[gestureDetector] = (int)((float)this.paddingYBottom[gestureDetector] * density);
}
final GestureDetector var7 = new GestureDetector(this.mContext, this.simpleOnGestureListener);
this.setOnTouchListener(new OnTouchListener() {
public boolean onTouch(View v, MotionEvent event) {
if(SwipeView.this.getChildCount() > 0) {
if(SwipeView.this.mScrollDirection != SwipeView.ScrollDirection.NONE) {
return false;
} else if(!SwipeView.this.enableTouchSwipe) {
return false;
} else {
var7.onTouchEvent(event);
switch(event.getAction()) {
case 0:
if(SwipeView.this.getChildCount() > 0) {
SwipeView.this.mFocusedView = SwipeView.this.getChildAt(SwipeView.this.getChildCount() - 1);
SwipeView.this.mFocusedViewLike = SwipeView.this.mFocusedView.findViewById(SwipeView.this.mLikeResource.intValue());
SwipeView.this.mFocusedViewNope = SwipeView.this.mFocusedView.findViewById(SwipeView.this.mNopeResource.intValue());
SwipeView.this.mFocusedViewWidth = SwipeView.this.mFocusedView.getWidth();
SwipeView.this.mFocusedView.setPadding(SwipeView.this.paddingX[0], 0, SwipeView.this.paddingX[0], 0);
}
SwipeView.this.resetScrollingValues();
break;
case 1:
SwipeView.this.alignCardsPadding();
if(SwipeView.this.mScrolledPixelsX < 0) {
SwipeView.this.mScrollModeX = SwipeView.ScrollMode.LEFT;
SwipeView.this.mTotalScrolledX = -SwipeView.this.mScrolledPixelsX;
} else {
SwipeView.this.mScrollModeX = SwipeView.ScrollMode.RIGHT;
SwipeView.this.mTotalScrolledX = SwipeView.this.mScrolledPixelsX;
}
if(SwipeView.this.mScrolledPixelsY < 0) {
SwipeView.this.mScrollModeY = SwipeView.ScrollMode.BOTTOM;
SwipeView.this.mTotalScrolledY = -SwipeView.this.mScrolledPixelsY;
} else {
SwipeView.this.mScrollModeY = SwipeView.ScrollMode.TOP;
SwipeView.this.mTotalScrolledY = SwipeView.this.mScrolledPixelsY;
}
SwipeView.this.detectSwipe();
}
return true;
}
} else {
return false;
}
}
});
}
public void addCard(View view, int position) {
if(this.getChildCount() <= 3 && position < 3) {
LinearLayout viewLayout = new LinearLayout(this.mContext);
viewLayout.setLayoutParams(new LayoutParams(-1, -1));
view.setLayoutParams(new LayoutParams(-1, -1));
viewLayout.addView(view);
viewLayout.setPadding(this.paddingX[position], this.paddingYTop[position], this.paddingX[position], this.paddingYBottom[position]);
this.addView(viewLayout, 0);
}
}
public void removeFocusedCard() {
this.removeView(this.mFocusedView);
this.alignCardsPadding();
}
private void alignCardsPadding() {
int i = 0;
for(int j = this.getChildCount() - 1; j >= 0; --j) {
this.getChildAt(j).setPadding(this.paddingX[i], this.paddingYTop[i], this.paddingX[i], this.paddingYBottom[i]);
++i;
}
this.mScrollDirection = SwipeView.ScrollDirection.NONE;
}
private void resetScrollingValues() {
this.mPreviousAlpha = 0.0F;
this.mNeedToScrollX = 0;
this.mScrolledPixelsX = 0;
this.mTotalScrolledX = 0;
this.mNeedToScrollY = 0;
this.mScrolledPixelsY = 0;
this.mTotalScrolledY = 0;
this.mScrollLengthX = 5;
this.mScrollLengthY = 5;
this.mScrollModeX = SwipeView.ScrollMode.NONE;
this.mScrollModeY = SwipeView.ScrollMode.NONE;
}
public void resetFocuedView() {
if(this.getChildCount() > 0) {
View mFocusedView = this.getChildAt(this.getChildCount() - 1);
View mFocusedViewLike = mFocusedView.findViewById(this.mLikeResource.intValue());
View mFocusedViewNope = mFocusedView.findViewById(this.mNopeResource.intValue());
setAlpha(mFocusedViewLike, 0.0F, 0.0F);
setAlpha(mFocusedViewNope, 0.0F, 0.0F);
mFocusedView.scrollTo(0, 0);
}
}
private void detectSwipe() {
int imageHalf = this.mFocusedView.getWidth() / 2;
this.mNeedToScrollX = this.mFocusedView.getWidth() - this.mTotalScrolledX;
if(this.mScrollDirection == SwipeView.ScrollDirection.NONE) {
if(this.mNeedToScrollX < imageHalf) {
this.mScrollDirection = SwipeView.ScrollDirection.OUT;
} else {
this.mScrollDirection = SwipeView.ScrollDirection.IN;
setAlpha(this.mFocusedViewLike, 0.0F, 0.0F);
setAlpha(this.mFocusedViewNope, 0.0F, 0.0F);
}
}
this.mScrollHandler.post(this.mScrollRunnable);
}
public void likeCard() {
if(this.getChildCount() > 0) {
this.mFocusedView = this.getChildAt(this.getChildCount() - 1);
this.mFocusedViewLike = this.mFocusedView.findViewById(this.mLikeResource.intValue());
this.mFocusedViewNope = this.mFocusedView.findViewById(this.mNopeResource.intValue());
if(this.mScrollDirection != SwipeView.ScrollDirection.NONE) {
return;
}
this.resetScrollingValues();
this.mScrollDirection = SwipeView.ScrollDirection.OUT;
this.mScrollModeX = SwipeView.ScrollMode.LEFT;
this.mFocusedViewLike.setVisibility(0);
setAlpha(this.mFocusedViewLike, 0.0F, 1.0F);
this.detectSwipe();
}
}
public void dislikeCard() {
if(this.getChildCount() > 0) {
this.mFocusedView = this.getChildAt(this.getChildCount() - 1);
this.mFocusedViewLike = this.mFocusedView.findViewById(this.mLikeResource.intValue());
this.mFocusedViewNope = this.mFocusedView.findViewById(this.mNopeResource.intValue());
if(this.mScrollDirection != SwipeView.ScrollDirection.NONE) {
return;
}
this.resetScrollingValues();
this.mScrollDirection = SwipeView.ScrollDirection.OUT;
this.mScrollModeX = SwipeView.ScrollMode.RIGHT;
this.mFocusedViewNope.setVisibility(0);
setAlpha(this.mFocusedViewNope, 0.0F, 1.0F);
this.detectSwipe();
}
}
public void setTouchable(boolean touchable) {
this.enableTouchSwipe = touchable;
}
public static void setAlpha(View view, float fromAlpha, float toAlpha) {
if(VERSION.SDK_INT < 11) {
AlphaAnimation alphaAnimation = new AlphaAnimation(fromAlpha, toAlpha);
alphaAnimation.setDuration(0L);
alphaAnimation.setFillAfter(true);
view.startAnimation(alphaAnimation);
} else {
view.setAlpha(toAlpha);
}
}
public interface OnCardSwipedListener {
void onLikes();
void onDisLikes();
void onSingleTap();
}
private static enum ScrollDirection {
IN,
OUT,
NONE;
private ScrollDirection() {
}
}
private static enum ScrollMode {
LEFT,
RIGHT,
TOP,
BOTTOM,
NONE;
private ScrollMode() {
}
}
}
ATTEMPT＃3 这是我尝试过的代码，但我一直得到相同的结果（请阅读下面的评论：
FrameLayout view = (FrameLayout)findViewById(R.id.contentLayout);
view.setDrawingCacheEnabled(true);
view.buildDrawingCache();
Bitmap bitmap = view.getDrawingCache();
答案 0 :(得分：0)
我相信，由于库代码，在onSwipe期间您要保存的图像会被删除。我认为你需要在调用onLike之前将代码移动到。
您还试图从整个布局的缓存中获取位图，而不是想要的ImageView：
bm=contentLayout.getDrawingCache();
您希望将当前的卡片视图作为一个视图，然后根据我对您的代码的理解，包含预期位图的实际ImageView的ID 是R.id.imgMeals，所以我建议更换一行：
bm=contentLayout.getDrawingCache();
以下内容：
ImageView imageView = (ImageView) cardView.findViewById(R.id.imgMeals);
BitmapDrawable drawable = (BitmapDrawable) imageView.getDrawable();
Bitmap bm = drawable.getBitmap();
将以下代码的所有从您拥有的地方移至我在代码的以下部分中标记为 // HERE !! 的位置（或更好，将它移动到一个新方法并在此处调用该方法。
// If the imageview of like is clicked
case R.id.imgLike: {
// HERE!!
// The imageview in the contentlayout will be swiped to the right
mSwipeView.likeCard();
break;
}
这是我移动的代码，包括我上面提到的更改：
View cardView = mSwipeView.getChildAt(mSwipeView.getChildCount() - 1);
ImageView imageView = (ImageView) cardView.findViewById(R.id.imgMeals);
BitmapDrawable drawable = (BitmapDrawable) imageView.getDrawable();
Bitmap bm = drawable.getBitmap();
OutputStream fOut = null;
try {
// Save on my sd card
File root = new File(Environment.getExternalStorageDirectory()
// Making a folder name Food Inspiration
+ File.separator + "Food Inspiration" + File.separator);
root.mkdirs();
File sdImageMainDirectory = null;
// Loop for having a different name for every image
int i = 0;
do {
sdImageMainDirectory = new File(root, "pic-" + i + ".png");
i++;
} while (sdImageMainDirectory.exists());
fOut = new FileOutputStream(sdImageMainDirectory);
// Updates the gallery of your phone with the folder and the "liked" images in it
MediaScannerConnection.scanFile(this, new String[] { sdImageMainDirectory.getAbsolutePath() }, null, null);
// If something goes wrong
} catch (Exception e) {
Toast.makeText(this, "Error occured. Please try again later.",
Toast.LENGTH_SHORT).show();
}
// Compresses the actual bitmap image
try {
bm.compress(Bitmap.CompressFormat.PNG, 100, fOut);
fOut.flush();
fOut.close();
} catch (Exception e){}