我要编辑我的绘画涂色图像。我正在获取位图图像并将其设置为画布位图，但是旧图像没有出现。我尝试使用drawingView.refresh()和recycle()方法，但无法使其正常工作。
private DrawingView mDrawingView;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_drawing);
if(datadtlimgsItem !=null && datadtlimgsItem.getImageStr()
!=null) {
decodedString = Base64.decode(datadtlimgsItem.getImageStr(),
Base64.DEFAULT);
decodedByte = BitmapFactory.decodeByteArray(decodedString, 0,
decodedString.length);
decodedByte = Util.resize(decodedByte, 400, 100);
mDrawingView.canvasBitmap = decodedByte;
}
}
public class DrawingView extends View{
// To hold the path that will be drawn.
private Path drawPath;
// Paint object to draw drawPath and drawCanvas.
private Paint drawPaint, canvasPaint;
// initial color
private int paintColor = 0xff000000;
private int previousColor = paintColor;
// canvas on which drawing takes place.
private Canvas drawCanvas;
// canvas bitmap
public Bitmap canvasBitmap;
// Brush stroke width
private float brushSize, lastBrushSize;
// To enable and disable erasing mode.
private boolean erase = false;
public DrawingView(Context context, AttributeSet attrs){
super(context, attrs);
setUpDrawing();
}
/**
* Initialize all objects required for drawing here.
* One time initialization reduces resource consumption.
*/
private void setUpDrawing(){
drawPath = new Path();
drawPaint = new Paint();
drawPaint.setColor(paintColor);
// Making drawing smooth.
drawPaint.setAntiAlias(true);
drawPaint.setStyle(Paint.Style.STROKE);
drawPaint.setStrokeJoin(Paint.Join.ROUND);
drawPaint.setStrokeCap(Paint.Cap.ROUND);
canvasPaint = new Paint(Paint.DITHER_FLAG);
// Initial brush size is medium.
brushSize = getResources().getInteger(R.integer.medium_size);
lastBrushSize = brushSize;
drawPaint.setStrokeWidth(brushSize);
}
@Override
protected void onSizeChanged(int w, int h, int oldw, int oldh) {
super.onSizeChanged(w, h, oldw, oldh);
canvasBitmap = Bitmap.createBitmap(w, h,
Bitmap.Config.ARGB_8888);
drawCanvas = new Canvas(canvasBitmap);
}
@Override
protected void onDraw(Canvas canvas) {
super.onDraw(canvas);
canvas.drawBitmap(canvasBitmap, 0, 0, canvasPaint);
canvas.drawPath(drawPath, drawPaint);
}
@Override
public boolean onTouchEvent(MotionEvent event) {
// X and Y position of user touch.
float touchX = event.getX();
float touchY = event.getY();
// Draw the path according to the touch event taking place.
switch (event.getAction()) {
case MotionEvent.ACTION_DOWN:
drawPath.moveTo(touchX, touchY);
break;
case MotionEvent.ACTION_MOVE:
drawPath.lineTo(touchX, touchY);
break;
case MotionEvent.ACTION_UP:
if (erase){
drawPaint.setXfermode(new
PorterDuffXfermode(PorterDuff.Mode.CLEAR));
}
drawCanvas.drawPath(drawPath, drawPaint);
drawPath.reset();
drawPaint.setXfermode(null);
break;
default:
return false;
}
// invalidate the view so that canvas is redrawn.
invalidate();
return true;
}
public void setColor(String newColor){
// invalidate the view
invalidate();
paintColor = Color.parseColor(newColor);
drawPaint.setColor(paintColor);
previousColor = paintColor;
}
public void setBrushSize(float newSize){
float pixelAmount =
TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP,
newSize, getResources().getDisplayMetrics());
brushSize=pixelAmount;
drawPaint.setStrokeWidth(brushSize);
}
public void setLastBrushSize(float lastSize){
lastBrushSize=lastSize;
}
public float getLastBrushSize(){
return lastBrushSize;
}
public void setErase(boolean isErase){
//set erase true or false
erase = isErase;
if(erase) {
drawPaint.setColor(Color.WHITE);
//drawPaint.setXfermode(new
PorterDuffXfermode(PorterDuff.Mode.CLEAR));
}
else {
drawPaint.setColor(previousColor);
drawPaint.setXfermode(null);
}
}
public void startNew(){
drawCanvas.drawColor(0, PorterDuff.Mode.CLEAR);
invalidate();
}
}
我有一个类似于“绘画”的视图，我想显示当前视图中从活动中获取的旧图像，然后编辑我的图像。
image is blank but i need to show previous image here
here is saved image want to edit this image
我有一个类似于Paint的视图，我想显示当前视图中从活动中获取的旧图像，然后编辑我的图像。我有一个类似“绘画”的视图，我想显示当前视图中从活动中获取的旧图像，然后编辑我的图像。我有一个类似“绘画”的视图，我想显示当前视图中从活动中获取的旧图像，然后编辑我的图像。我有一个类似“绘画”的视图，我想显示当前视图中从活动中获取的旧图像，然后编辑我的图像。我有一个类似于“绘画”的视图，我想显示当前视图中从活动中获取的旧图像，然后编辑我的图像。
答案 0 :(得分：0)
class Gallery_adm_adp(
val mylist: ArrayList<Model_class_one>,
val fragmentActivity: FragmentActivity,
val pages: Int
) :
RecyclerView.Adapter<Gallery_adm_adp.Viewholder>() {
var currentpage = 2
lateinit var loadmore: RelativeLayout
lateinit var image: ImageView
lateinit internal var edit_menu: ImageView
inner class Viewholder(itemView: View) : RecyclerView.ViewHolder(itemView) {
@SuppressLint("ShowToast")
fun mydata(list: Model_class_one?, position: Int) {
edit_menu = itemView.findViewById(R.id.edit_menu)
Log.i("List_check", "running position>> " + position)
loadmore.visibility = View.GONE
Glide.with(fragmentActivity).load(list!!.Image).into(image)
if (position == mylist.size - 1) {
if (pages >= currentpage) {
loadmore.setVisibility(View.VISIBLE)
callnextapi()
} else {
loadmore.setVisibility(View.GONE)
}
} else {
loadmore.setVisibility(View.GONE)
}
edit_menu.setOnClickListener {
val id = list.ID
popup(itemView, id, position)
Log.d("clicks", "position" + position)
}
}
}
private fun popup(itemView: View, id: String, position: Int) {
val popup: PopupMenu
popup = PopupMenu(fragmentActivity, itemView.edit_menu)
popup.inflate(R.menu.menu_delete)
popup.setOnMenuItemClickListener { item ->
when (item.itemId) {
R.id.delete -> {
showdialog(id, position)
}
}
false
}
//displaying the popup
popup.show()
}
private fun showdialog(ids: String, position: Int) {
val builder = AlertDialog.Builder(fragmentActivity)
builder.setTitle("Delete")
.setMessage("Do You Want to delete this post")
.setCancelable(false)
.setPositiveButton("Yes") { dialog, id ->
deleteitem(ids, position)
}.setNegativeButton("No") { dialogInterface, i ->
}
val alert = builder.create()
alert.show()
}
private fun toast(text: String) {
((fragmentActivity as MainActivity_Admin).customtoast(text))
Toast.makeText(fragmentActivity, text, Toast.LENGTH_SHORT).show()
}
private fun deleteitem(id: String, position: Int) {
val requestQueue = Volley.newRequestQueue(fragmentActivity)
val URL = Constant.DeleteGallery + id
val stringRequest = object : StringRequest(Request.Method.POST, URL,
Response.Listener { response ->
Log.i("VOLLEY_res", "my responce>>$response")
try {
val result = response
toast(result)
mylist.removeAt(position)
notifyItemRemoved(position)
notifyItemRangeChanged(position, mylist.size)
} catch (e: JSONException) {
e.printStackTrace()
toast("Can't Delete .. Please Try Again")
}
}, Response.ErrorListener { error ->
toast("Check Internet Connection and Try Again")
}) {
}
requestQueue.add(stringRequest)
}
override fun getItemViewType(position: Int): Int {
return position
}
private fun callnextapi() {
val requestQueue = Volley.newRequestQueue(fragmentActivity)
val URL = Constant.Gallery + currentpage
val stringRequest = object : StringRequest(Request.Method.POST, URL,
Response.Listener { response ->
try {
val result = JSONObject(response)
val ListDetails = result.getJSONArray("ListDetails")
val length = ListDetails.length()
for (i in 0 until length) {
val objJson = ListDetails.getJSONObject(i)
val ID = objJson.getString("ID")
val UserName = objJson.getString("UserName")
val Image = objJson.getString("Image")
val UserID = objJson.getString("UserID")
var Date = objJson.getString("Date")
Date = Date.replace("12:00:00 AM","")
mylist.add(Model_class_one(ID, UserName, Image, UserID,Date))
}
notifyDataSetChanged()
currentpage = currentpage + 1
} catch (e: JSONException) {
e.printStackTrace()
}
}, Response.ErrorListener { error ->
}) {
}
requestQueue.add(stringRequest)
}
override fun onCreateViewHolder(parent: ViewGroup, p1: Int): Gallery_adm_adp.Viewholder {
val layout = LayoutInflater.from(fragmentActivity as Context?).inflate(R.layout.gallery_adp_admin, parent, false)
loadmore = layout.findViewById(R.id.loadmore)
image = layout.findViewById(R.id.image)
return Viewholder(layout)
}
override fun getItemCount(): Int {
return mylist.size
}
override fun onBindViewHolder(holder: Gallery_adm_adp.Viewholder, position: Int) {
val Values = mylist[position]
holder.mydata(Values, position)
}
}