我正在尝试编写一个项目。在我的项目中，我可以成功拖动图像。 This is the PICTURE这是我的ViewOnTouchListener代码：
package com.seifi.dragtestapplication;
import android.graphics.Point;
import android.view.MotionEvent;
import android.view.View;
import android.widget.FrameLayout;
class ViewOnTouchListener implements View.OnTouchListener {
Point pushPoint, closePoint;
int lastImgLeft;
int lastImgTop;
FrameLayout.LayoutParams viewLP;
FrameLayout.LayoutParams pushBtnLP;
FrameLayout.LayoutParams closeBtnLP;
int lastPushBtnLeft, lastCloseBtnLeft;
int lastPushBtnTop, lastCloseBtnTop;
private View mPushView, mCloseView, mShadowView;
ViewOnTouchListener(View mPushView, View mCloseView, View mShadowView) {
this.mPushView = mPushView;
this.mCloseView = mCloseView;
this.mShadowView = mShadowView;
}
@Override
public boolean onTouch(View view, MotionEvent event) {
switch (event.getAction() & MotionEvent.ACTION_MASK) {
case MotionEvent.ACTION_DOWN:
if (null == viewLP) {
viewLP = (FrameLayout.LayoutParams) view.getLayoutParams();
}
if (null == pushBtnLP) {
pushBtnLP = (FrameLayout.LayoutParams) mPushView.getLayoutParams();
}
if (null == closeBtnLP) {
closeBtnLP = (FrameLayout.LayoutParams) mCloseView.getLayoutParams();
}
closePoint = getRawPoint(event);
pushPoint = getRawPoint(event);
lastImgLeft = viewLP.leftMargin;
lastImgTop = viewLP.topMargin;
lastPushBtnLeft = pushBtnLP.leftMargin;
lastPushBtnTop = pushBtnLP.topMargin;
lastCloseBtnLeft = closeBtnLP.leftMargin;
lastCloseBtnTop = closeBtnLP.topMargin;
(mShadowView).setBackgroundResource(R.drawable.my_shadow_pressed);
break;
case MotionEvent.ACTION_MOVE:
Point newPoint = getRawPoint(event);
float moveX = newPoint.x - pushPoint.x;
float moveY = newPoint.y - pushPoint.y;
viewLP.leftMargin = (int) (lastImgLeft + moveX);
viewLP.topMargin = (int) (lastImgTop + moveY);
view.setLayoutParams(viewLP);
pushBtnLP.leftMargin = (int) (lastPushBtnLeft + moveX);
pushBtnLP.topMargin = (int) (lastPushBtnTop + moveY);
mPushView.setLayoutParams(pushBtnLP);
closeBtnLP.leftMargin = (int) (lastCloseBtnLeft + moveX);
closeBtnLP.topMargin = (int) (lastCloseBtnTop + moveY);
mCloseView.setLayoutParams(closeBtnLP);
break;
case MotionEvent.ACTION_UP: {
(mShadowView).setBackgroundResource(R.drawable.my_shadow);
break;
}
}
return false;
}
private Point getRawPoint(MotionEvent event) {
return new Point((int) event.getRawX(), (int) event.getRawY());
}
}
Look at the PICTURE please 这是我的DragView代码：
package com.seifi.dragtestapplication;
import android.content.Context;
import android.content.res.TypedArray;
import android.graphics.drawable.Drawable;
import android.util.AttributeSet;
import android.util.TypedValue;
import android.view.View;
import android.view.ViewGroup;
import android.widget.FrameLayout;
import android.widget.ImageView;
import android.widget.LinearLayout;
public class DragView extends LinearLayout {
private ImageView mView;
private ImageView mPushView;
private ImageView mCloseView;
private View mShadowView;
private float _1dp;
private boolean mCenterInParent = true;
private Drawable mImageDrawable, mPushImageDrawable, mCloseImageDrawable, mShadowImageDrawable;
private float mImageHeight, mImageWidth, mPushImageHeight, mPushImageWidth, mCloseImageHeight, mCloseImageWidth, mShadowImageWidth, mShadowImageHeight;
private int mLeft = 0, mTop = 0;
public DragView(Context context) {
this(context, null, 0);
}
public DragView(Context context, AttributeSet attrs) {
this(context, attrs, 0);
}
public DragView(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
this._1dp = TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, 1, context.getResources().getDisplayMetrics());
this.parseAttr(context, attrs);
View mRoot = View.inflate(context, R.layout.drag_layout, null);
addView(mRoot, -1, -1);
mPushView = (ImageView) mRoot.findViewById(R.id.push_view);
mView = (ImageView) mRoot.findViewById(R.id.view);
mCloseView = (ImageView) mRoot.findViewById(R.id.close_view);
mShadowView = (View)mRoot.findViewById(R.id.shadowView);
mView.setOnTouchListener(new ViewOnTouchListener(mPushView, mCloseView, mShadowView));
}
private void parseAttr(Context context, AttributeSet attrs) {
if (null == attrs) return;
TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.SingleFingerView);
if (a != null) {
int n = a.getIndexCount();
for (int i = 0; i < n; i++) {
int attr = a.getIndex(i);
if (attr == R.styleable.SingleFingerView_centerInParent) {
this.mCenterInParent = a.getBoolean(attr, true);
} else if (attr == R.styleable.SingleFingerView_image) {
this.mImageDrawable = a.getDrawable(attr);
} else if (attr == R.styleable.SingleFingerView_image_height) {
this.mImageHeight = a.getDimension(attr, 200 * _1dp);
} else if (attr == R.styleable.SingleFingerView_image_width) {
this.mImageWidth = a.getDimension(attr, 200 * _1dp);
} else if (attr == R.styleable.SingleFingerView_push_image) {
this.mPushImageDrawable = a.getDrawable(attr);
} else if (attr == R.styleable.SingleFingerView_push_image_width) {
this.mPushImageWidth = a.getDimension(attr, 30 * _1dp);
} else if (attr == R.styleable.SingleFingerView_push_image_height) {
this.mPushImageHeight = a.getDimension(attr, 30 * _1dp);
} else if (attr == R.styleable.SingleFingerView_left) {
this.mLeft = (int) a.getDimension(attr, 0 * _1dp);
} else if (attr == R.styleable.SingleFingerView_top) {
this.mTop = (int) a.getDimension(attr, 0 * _1dp);
} else if (attr == R.styleable.SingleFingerView_close_image) {
this.mCloseImageDrawable = a.getDrawable(attr);
} else if (attr == R.styleable.SingleFingerView_close_image_width) {
this.mCloseImageWidth = a.getDimension(attr, 30 * _1dp);
} else if (attr == R.styleable.SingleFingerView_close_image_height) {
this.mCloseImageHeight = a.getDimension(attr, 30 * _1dp);
} else if (attr == R.styleable.SingleFingerView_shadow_image) {
this.mShadowImageDrawable = a.getDrawable(attr);
} else if (attr == R.styleable.SingleFingerView_shadow_image_width) {
this.mShadowImageWidth = a.getDimension(attr, 200 * _1dp);
} else if (attr == R.styleable.SingleFingerView_shadow_image_height) {
this.mShadowImageHeight = a.getDimension(attr, 200 * _1dp);
}
}
}
}
private void setViewToAttr(int pWidth, int pHeight) {
if (null != mImageDrawable) {
this.mView.setBackgroundDrawable(mImageDrawable);
}
if (null != mPushImageDrawable) {
this.mPushView.setBackgroundDrawable(mPushImageDrawable);
}
if (null != mCloseImageDrawable) {
this.mCloseView.setBackgroundDrawable(mCloseImageDrawable);
}
if (null != mShadowImageDrawable) {
this.mShadowView.setBackgroundDrawable(mShadowImageDrawable);
}
FrameLayout.LayoutParams viewLP = (FrameLayout.LayoutParams) this.mView.getLayoutParams();
viewLP.width = (int) mImageWidth;
viewLP.height = (int) mImageHeight;
int left = 0, top = 0;
if (mCenterInParent) {
left = pWidth / 2 - viewLP.width / 2;
top = pHeight / 2 - viewLP.height / 2;
} else {
if (mLeft > 0) left = mLeft;
if (mTop > 0) top = mTop;
}
viewLP.leftMargin = left;
viewLP.topMargin = top;
this.mView.setLayoutParams(viewLP);
this.mShadowView.setLayoutParams(viewLP);
FrameLayout.LayoutParams pushViewLP = (FrameLayout.LayoutParams) mPushView.getLayoutParams();
pushViewLP.width = (int) mPushImageWidth;
pushViewLP.height = (int) mPushImageHeight;
pushViewLP.leftMargin = (int) (viewLP.leftMargin + mImageWidth - mPushImageWidth / 2);
pushViewLP.topMargin = (int) (viewLP.topMargin + mImageHeight - mPushImageHeight / 2);
mPushView.setLayoutParams(pushViewLP);
FrameLayout.LayoutParams closeViewLP = (FrameLayout.LayoutParams) mCloseView.getLayoutParams();
closeViewLP.width = (int) mCloseImageWidth;
closeViewLP.height = (int) mCloseImageHeight;
closeViewLP.leftMargin = (int) (viewLP.leftMargin - mCloseImageWidth / 2);
closeViewLP.topMargin = (int) (viewLP.topMargin - mCloseImageHeight / 2);
mCloseView.setLayoutParams(closeViewLP);
}
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
super.onMeasure(widthMeasureSpec, heightMeasureSpec);
setParamsForView(widthMeasureSpec, heightMeasureSpec);
}
private boolean hasSetParamsForView = false;
private void setParamsForView(int widthMeasureSpec, int heightMeasureSpec) {
ViewGroup.LayoutParams layoutParams = getLayoutParams();
if (null != layoutParams && !hasSetParamsForView) {
System.out.println("");
hasSetParamsForView = true;
int width;
if ((getLayoutParams().width == LayoutParams.MATCH_PARENT)) {
width = MeasureSpec.getSize(widthMeasureSpec);
} else {
width = getLayoutParams().width;
}
int height;
if ((getLayoutParams().height == LayoutParams.MATCH_PARENT)) {
height = MeasureSpec.getSize(heightMeasureSpec);
} else {
height = getLayoutParams().height;
}
setViewToAttr(width, height);
}
}
}
答案 0 :(得分：1)
最后我找到了正确的答案。我认为这可能会有所帮助。所以我分享它。 首先，我在DragView类中引入了一个这样的Rigion对象：
public Region region;
然后，我在构造函数中添加了一行：
region = new Region(mView.getLeft(), mView.getTop(), mView.getRight(), mView.getBottom());
然后我在DragView.java文件中添加了一个方法：
public boolean onTouchEvent (MotionEvent event){
final int action = event.getAction();
final int x = (int) event.getX();
final int y = (int) event.getY();
switch (action & MotionEventCompat.ACTION_MASK) {
case MotionEvent.ACTION_DOWN:
if (!region.contains(x, y)) {
mShadowView.setVisibility(INVISIBLE);
mCloseView.setVisibility(GONE);
mPushView.setVisibility(GONE);
}
break;
}
return true;
}
因此DragView.java填充将为：
package com.seifi.dragtestapplication;
import android.content.Context;
import android.content.res.TypedArray;
import android.graphics.Region;
import android.graphics.drawable.Drawable;
import android.support.v4.view.MotionEventCompat;
import android.util.AttributeSet;
import android.util.TypedValue;
import android.view.MotionEvent;
import android.view.View;
import android.view.ViewGroup;
import android.widget.FrameLayout;
import android.widget.ImageView;
import android.widget.LinearLayout;
public class DragView extends LinearLayout {
private ImageView mView;
private ImageView mPushView;
private ImageView mCloseView;
private View mShadowView;
private float _1dp;
private boolean mCenterInParent = true;
private Drawable mImageDrawable, mPushImageDrawable, mCloseImageDrawable, mShadowImageDrawable;
private float mImageHeight, mImageWidth, mPushImageHeight, mPushImageWidth, mCloseImageHeight, mCloseImageWidth, mShadowImageWidth, mShadowImageHeight;
private int mLeft = 0, mTop = 0;
public Region region;
public DragView(Context context) {
this(context, null, 0);
}
public DragView(Context context, AttributeSet attrs) {
this(context, attrs, 0);
}
public DragView(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
this._1dp = TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, 1, context.getResources().getDisplayMetrics());
this.parseAttr(context, attrs);
View mRoot = View.inflate(context, R.layout.drag_layout, null);
addView(mRoot, -1, -1);
mPushView = (ImageView) mRoot.findViewById(R.id.push_view);
mView = (ImageView) mRoot.findViewById(R.id.view);
mCloseView = (ImageView) mRoot.findViewById(R.id.close_view);
mShadowView = (View)mRoot.findViewById(R.id.shadowView);
mView.setOnTouchListener(new ViewOnTouchListener(mPushView, mCloseView, mShadowView));
region = new Region(mView.getLeft(), mView.getTop(), mView.getRight(), mView.getBottom());
}
private void parseAttr(Context context, AttributeSet attrs) {
if (null == attrs) return;
TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.SingleFingerView);
if (a != null) {
int n = a.getIndexCount();
for (int i = 0; i < n; i++) {
int attr = a.getIndex(i);
if (attr == R.styleable.SingleFingerView_centerInParent) {
this.mCenterInParent = a.getBoolean(attr, true);
} else if (attr == R.styleable.SingleFingerView_image) {
this.mImageDrawable = a.getDrawable(attr);
} else if (attr == R.styleable.SingleFingerView_image_height) {
this.mImageHeight = a.getDimension(attr, 200 * _1dp);
} else if (attr == R.styleable.SingleFingerView_image_width) {
this.mImageWidth = a.getDimension(attr, 200 * _1dp);
} else if (attr == R.styleable.SingleFingerView_push_image) {
this.mPushImageDrawable = a.getDrawable(attr);
} else if (attr == R.styleable.SingleFingerView_push_image_width) {
this.mPushImageWidth = a.getDimension(attr, 30 * _1dp);
} else if (attr == R.styleable.SingleFingerView_push_image_height) {
this.mPushImageHeight = a.getDimension(attr, 30 * _1dp);
} else if (attr == R.styleable.SingleFingerView_left) {
this.mLeft = (int) a.getDimension(attr, 0 * _1dp);
} else if (attr == R.styleable.SingleFingerView_top) {
this.mTop = (int) a.getDimension(attr, 0 * _1dp);
} else if (attr == R.styleable.SingleFingerView_close_image) {
this.mCloseImageDrawable = a.getDrawable(attr);
} else if (attr == R.styleable.SingleFingerView_close_image_width) {
this.mCloseImageWidth = a.getDimension(attr, 30 * _1dp);
} else if (attr == R.styleable.SingleFingerView_close_image_height) {
this.mCloseImageHeight = a.getDimension(attr, 30 * _1dp);
} else if (attr == R.styleable.SingleFingerView_shadow_image) {
this.mShadowImageDrawable = a.getDrawable(attr);
} else if (attr == R.styleable.SingleFingerView_shadow_image_width) {
this.mShadowImageWidth = a.getDimension(attr, 200 * _1dp);
} else if (attr == R.styleable.SingleFingerView_shadow_image_height) {
this.mShadowImageHeight = a.getDimension(attr, 200 * _1dp);
}
}
}
}
private void setViewToAttr(int pWidth, int pHeight) {
if (null != mImageDrawable) {
this.mView.setBackgroundDrawable(mImageDrawable);
}
if (null != mPushImageDrawable) {
this.mPushView.setBackgroundDrawable(mPushImageDrawable);
}
if (null != mCloseImageDrawable) {
this.mCloseView.setBackgroundDrawable(mCloseImageDrawable);
}
if (null != mShadowImageDrawable) {
this.mShadowView.setBackgroundDrawable(mShadowImageDrawable);
}
FrameLayout.LayoutParams viewLP = (FrameLayout.LayoutParams) this.mView.getLayoutParams();
viewLP.width = (int) mImageWidth;
viewLP.height = (int) mImageHeight;
int left = 0, top = 0;
if (mCenterInParent) {
left = pWidth / 2 - viewLP.width / 2;
top = pHeight / 2 - viewLP.height / 2;
} else {
if (mLeft > 0) left = mLeft;
if (mTop > 0) top = mTop;
}
viewLP.leftMargin = left;
viewLP.topMargin = top;
this.mView.setLayoutParams(viewLP);
this.mShadowView.setLayoutParams(viewLP);
FrameLayout.LayoutParams pushViewLP = (FrameLayout.LayoutParams) mPushView.getLayoutParams();
pushViewLP.width = (int) mPushImageWidth;
pushViewLP.height = (int) mPushImageHeight;
pushViewLP.leftMargin = (int) (viewLP.leftMargin + mImageWidth - mPushImageWidth / 2);
pushViewLP.topMargin = (int) (viewLP.topMargin + mImageHeight - mPushImageHeight / 2);
mPushView.setLayoutParams(pushViewLP);
FrameLayout.LayoutParams closeViewLP = (FrameLayout.LayoutParams) mCloseView.getLayoutParams();
closeViewLP.width = (int) mCloseImageWidth;
closeViewLP.height = (int) mCloseImageHeight;
closeViewLP.leftMargin = (int) (viewLP.leftMargin - mCloseImageWidth / 2);
closeViewLP.topMargin = (int) (viewLP.topMargin - mCloseImageHeight / 2);
mCloseView.setLayoutParams(closeViewLP);
}
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
super.onMeasure(widthMeasureSpec, heightMeasureSpec);
setParamsForView(widthMeasureSpec, heightMeasureSpec);
}
private boolean hasSetParamsForView = false;
private void setParamsForView(int widthMeasureSpec, int heightMeasureSpec) {
ViewGroup.LayoutParams layoutParams = getLayoutParams();
if (null != layoutParams && !hasSetParamsForView) {
System.out.println("");
hasSetParamsForView = true;
int width;
if ((getLayoutParams().width == LayoutParams.MATCH_PARENT)) {
width = MeasureSpec.getSize(widthMeasureSpec);
} else {
width = getLayoutParams().width;
}
int height;
if ((getLayoutParams().height == LayoutParams.MATCH_PARENT)) {
height = MeasureSpec.getSize(heightMeasureSpec);
} else {
height = getLayoutParams().height;
}
setViewToAttr(width, height);
}
}
public boolean onTouchEvent (MotionEvent event){
final int action = event.getAction();
final int x = (int) event.getX();
final int y = (int) event.getY();
switch (action & MotionEventCompat.ACTION_MASK) {
case MotionEvent.ACTION_DOWN:
if (!region.contains(x, y)) {
mShadowView.setVisibility(INVISIBLE);
mCloseView.setVisibility(GONE);
mPushView.setVisibility(GONE);
}
break;
}
return true;
}
}
最后，我们必须将这些行添加到ViewOnTouchListener.java文件中：
mShadowView.setVisibility(View.VISIBLE);
mCloseView.setVisibility(View.VISIBLE);
mPushView.setVisibility(View.VISIBLE);
所以这个文件将是：
package com.seifi.dragtestapplication;
import android.graphics.Point;
import android.view.MotionEvent;
import android.view.View;
import android.widget.FrameLayout;
class ViewOnTouchListener implements View.OnTouchListener {
Point pushPoint, closePoint;
int lastImgLeft;
int lastImgTop;
FrameLayout.LayoutParams viewLP;
FrameLayout.LayoutParams pushBtnLP;
FrameLayout.LayoutParams closeBtnLP;
int lastPushBtnLeft, lastCloseBtnLeft;
int lastPushBtnTop, lastCloseBtnTop;
private View mPushView, mCloseView, mShadowView;
ViewOnTouchListener(View mPushView, View mCloseView, View mShadowView) {
this.mPushView = mPushView;
this.mCloseView = mCloseView;
this.mShadowView = mShadowView;
}
@Override
public boolean onTouch(View view, MotionEvent event) {
switch (event.getAction() & MotionEvent.ACTION_MASK) {
case MotionEvent.ACTION_DOWN:
if (null == viewLP) {
viewLP = (FrameLayout.LayoutParams) view.getLayoutParams();
}
if (null == pushBtnLP) {
pushBtnLP = (FrameLayout.LayoutParams) mPushView.getLayoutParams();
}
if (null == closeBtnLP) {
closeBtnLP = (FrameLayout.LayoutParams) mCloseView.getLayoutParams();
}
closePoint = getRawPoint(event);
pushPoint = getRawPoint(event);
lastImgLeft = viewLP.leftMargin;
lastImgTop = viewLP.topMargin;
lastPushBtnLeft = pushBtnLP.leftMargin;
lastPushBtnTop = pushBtnLP.topMargin;
lastCloseBtnLeft = closeBtnLP.leftMargin;
lastCloseBtnTop = closeBtnLP.topMargin;
(mShadowView).setBackgroundResource(R.drawable.my_shadow_pressed);
mShadowView.setVisibility(View.VISIBLE);
mCloseView.setVisibility(View.VISIBLE);
mPushView.setVisibility(View.VISIBLE);
break;
case MotionEvent.ACTION_MOVE:
Point newPoint = getRawPoint(event);
float moveX = newPoint.x - pushPoint.x;
float moveY = newPoint.y - pushPoint.y;
viewLP.leftMargin = (int) (lastImgLeft + moveX);
viewLP.topMargin = (int) (lastImgTop + moveY);
view.setLayoutParams(viewLP);
pushBtnLP.leftMargin = (int) (lastPushBtnLeft + moveX);
pushBtnLP.topMargin = (int) (lastPushBtnTop + moveY);
mPushView.setLayoutParams(pushBtnLP);
closeBtnLP.leftMargin = (int) (lastCloseBtnLeft + moveX);
closeBtnLP.topMargin = (int) (lastCloseBtnTop + moveY);
mCloseView.setLayoutParams(closeBtnLP);
break;
case MotionEvent.ACTION_UP: {
(mShadowView).setBackgroundResource(R.drawable.my_shadow);
break;
}
}
return false;
}
private Point getRawPoint(MotionEvent event) {
return new Point((int) event.getRawX(), (int) event.getRawY());
}
}
现在，每件事都是O.K. 它完美无缺。 LINK OF VIDEO