我正在尝试实现绘图工具。
因此，我有一个活动AddCanvasActivity和一个自定义的视图类DrawingView
应该有一个按钮来确认绘图过程，然后我想回到我的第一个活动。
我无法弄清楚它为什么不起作用。 这是我发现我的代码正在做什么
D/ADDCANVAS- DrawingView: onTouchEvent
D/TouchEvent true: 442.4297
D/TouchEvent true: 575.8801
D/DrawingView: TouchUp
D/State: pencil
所以这里是我画完一条线的地方，之后我点击了相应的按钮确认了画布
D/iscontent Pathsarray: true
D/getPaint pathinfo: -16777216
D/Add Path first content: -16777216
D/DrawingView: OnDraw
D/iscontent Pathsarray: true
D/AddCanvasActivityíy: Content true pathsarray
D/Finished: true
D/DrawingView: OnDraw
D/EGL_emulation: eglMakeCurrent: 0xa303da20: ver 3 0 (tinfo 0xa4f9bd40)
D/EGL_emulation: eglMakeCurrent: 0xa303da20: ver 3 0 (tinfo 0xa4f9bd40)
D/EGL_emulation: eglMakeCurrent: 0xa303da20: ver 3 0 (tinfo 0xa4f9bd40)
D/EGL_emulation: eglMakeCurrent: 0xa303da20: ver 3 0 (tinfo 0xa4f9bd40)
D/EGL_emulation: eglMakeCurrent: 0xa303da20: ver 3 0 (tinfo 0xa4f9bd40)
D/OpenGLRenderer: endAllActiveAnimators on 0x958f3e00 (RippleDrawable) with handle 0x959bf910
D/EGL_emulation: eglMakeCurrent: 0xa303da20: ver 3 0 (tinfo 0xa4f9bd40)
然后我第二次确认了，但我的数据已经丢失了......
D/iscontent Pathsarray: false
D/AddCanvasActivityíy: Content false pathsarray
D/pa: isnull
D/onActivityResult: added canvas to canvases
D/EGL_emulation: eglMakeCurrent: 0xa303da20: ver 3 0 (tinfo 0xa4f9bd40)
D/EGL_emulation: eglMakeCurrent: 0xa303da20: ver 3 0 (tinfo 0xa4f9bd40)
D/EGL_emulation: eglMakeCurrent: 0xa303da20: ver 3 0 (tinfo 0xa4f9bd40)
D/EGL_emulation: eglMakeCurrent: 0xa303da20: ver 3 0 (tinfo 0xa4f9bd40)
D/EGL_emulation: eglMakeCurrent: 0xa303da20: ver 3 0 (tinfo 0xa4f9bd40)
D/OpenGLRenderer: endAllActiveAnimators on 0x95810580 (RippleDrawable) with handle 0xa2edb8c0
D/EGL_emulation: eglMakeCurrent: 0xa303da20: ver 3 0 (tinfo 0xa4f9bd40)
应用程序之后仍在运行，但我不知道如何处理这些OpenGL信息。
我班级的代码是
public class AddCanvasActivity extends AppCompatActivity{
DrawingView dv ;
private String mDrawOption;
private Paint mPaint;
private Boolean mFinished;
private PathsArray mPathsArray;
private PathInformation mPathInformation;
@Override
protected void onCreate(Bundle saveInstanceState){
if(getIntent().getBooleanExtra("Finished",false)) {
finish();
}
super.onCreate(saveInstanceState);
dv = new DrawingView(this);
mDrawOption = new String("pencil");
mPaint = new Paint();
mPaint = new Paint();
mPaint.setAntiAlias(true);
mPaint.setDither(true);
mPaint.setColor(Color.BLACK);
mPaint.setStyle(Paint.Style.STROKE);
mPaint.setStrokeJoin(Paint.Join.ROUND);
mPaint.setStrokeCap(Paint.Cap.ROUND);
mPaint.setStrokeWidth(12);
mPaint.setTextSize(50);
mDrawOption = new String();
mDrawOption = "pencil";
mFinished=false;
mPathsArray = new PathsArray();
setContentView(R.layout.view_add_canvas);
ActionBar actionbar = getSupportActionBar();
actionbar.setDisplayHomeAsUpEnabled(true);
actionbar.setDisplayShowTitleEnabled(false);
Log.d("Activit onCreate", "AddCanvasActivity");
}
protected void onStart(Bundle SavedInstances){
super.onStart();
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
MenuInflater inflater = getMenuInflater();
inflater.inflate(R.menu.menu_add_canvas, menu);
MenuItem item = menu.findItem(R.id.menuColor);
Spinner spinner = (Spinner) menu.findItem(R.id.menuColor).getActionView();
ArrayAdapter<CharSequence> adapter = ArrayAdapter.createFromResource(this,
R.array.array_choose_color, android.R.layout.simple_spinner_item);
adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
spinner.setAdapter(adapter);
AdapterView.OnItemSelectedListener ListenerColorChoose = new AdapterView.OnItemSelectedListener() {
@Override
public void onItemSelected(AdapterView<?> adapterView, View view, int position, long id) {
Log.d("Onitemse pos:", Integer.toString(position));
Log.d("Onitemse id:", Long.toString(id));
for(int c = 0; c<= mPathsArray.getLength(); c++){
Log.d("colorchange id before ", Integer.toString(c)) ;
Log.d("colorchange color befor", Integer.toString(mPathsArray.getPathInfo(c).getPaint().getColor())) ;
}
switch (position) {
case 0:
//clear before?
mPaint.setColor(Color.BLACK);
break;
case 1:
mPaint.setColor(Color.BLUE);
break;
case 2:
mPaint.setColor(Color.GREEN);
break;
case 3:
mPaint.setColor(Color.YELLOW);
break;
case 4:
mPaint.setColor(Color.RED);
break;
case 5:
mPaint.setColor(Color.WHITE);
break;
}
for(int c = 0; c<= mPathsArray.getLength(); c++){
Log.d("colorchange id after ", Integer.toString(c)) ;
Log.d("colorchange color after", Integer.toString(mPathsArray.getPathInfo(c).getPaint().getColor())) ;
}
}
@Override
public void onNothingSelected(AdapterView<?> adapterView) {
Log.d("Onitemse pos:", "nothing");
}
};
spinner.setOnItemSelectedListener(ListenerColorChoose);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
// Respond to the action bar's Up/Home button
case android.R.id.home:
NavUtils.navigateUpFromSameTask(this);
return true;
case R.id.action_scrollback:
dv.undoLastPath();
break;
case R.id.action_confirm:
Intent intent = new Intent(this, ShowAllActivity.class);
if(mPathsArray.isContent()){
Log.d("AddCanvasActivityíy", "Content true pathsarray");
intent.putExtra("pathsArray", mPathsArray);
intent.putExtra("Finished",true);
setResult(RESULT_OK,intent);
mFinished = true;
Log.d("Finished", "true");
finish();
return true;
}
else{
Log.d("AddCanvasActivityíy", "Content false pathsarray");
intent.putExtra("pathsArray", mPathsArray);
setResult(RESULT_CANCELED, intent);
mFinished = true;
finish();
return true;
}
case R.id.circle:
mDrawOption = "circle";
Log.d("SUCCESS", "chose Circle");
break;
case R.id.pencil:
mDrawOption="pencil";
Log.d("SUCCESS", "chose Pencil");
break;
case R.id.ellipse:
mDrawOption = "ellipse";
Log.d("SUCCESS", "chose Ellipse");
break;
case R.id.line:
mDrawOption = "line";
Log.d("SUCCESS", "chose Linie");
break;
case R.id.rectangle:
mDrawOption = "rectangle";
Log.d("SUCCESS", "chose Rectangle");
break;
case R.id.text:
mDrawOption = "text";
Log.d("SUCCESS", "chose Text");
break;
}
return super.onOptionsItemSelected(item);
}
public Paint getPaint(){
return this.mPaint;
}
public String getDrawOption(){
return this.mDrawOption;
}
public PathsArray getPathsArray(){
return this.mPathsArray;
}
public Boolean getFinished(){
return this.mFinished;
}
public boolean undoLast(){
return mPathsArray.undoLast();
}
public void addPath(PathInformation pi){
mPathsArray.addPath(pi);
}
}
和DrawingView
public class DrawingView extends View {
public int width;
public int height;
private Bitmap mBitmap;
private Canvas mCanvas;
private Path mPath;
private Paint mBitmapPaint;
Context context;
private Paint circlePaint;
private Path circlePath;
private Path mPreviewPath;
private ShapeDrawable mDrawable;
private float mStartX;
private float mStartY;
private float mDistanceX;
private float mDistanceY;
private float mDistance;
private float radiusPreview;
private Paint clearPaint;
private AddCanvasActivity mActivity;
//constructors
public DrawingView(Context c) {
super(c);
Log.d("DrawingView", "OnCreate1");
this.setUp(c);
}
public DrawingView(Context c, AttributeSet attributeSet) {
super(c, attributeSet);
Log.d("DrawingView", "OnCreate2");
this.setUp(c);
}
public DrawingView(Context c, AttributeSet attributeSet, int defStyle) {
super(c,attributeSet,defStyle);
Log.d("ADDCANVAS - DrawingView", "OnCreate3");
this.setUp(c);
}
public void setUp(Context c){
context = c;
mPath = new Path();
mPreviewPath = new Path();
mBitmapPaint = new Paint(Paint.DITHER_FLAG);
clearPaint = new Paint();
circlePaint = new Paint();
circlePath = new Path();
circlePaint.setAntiAlias(true);
circlePaint.setColor(Color.BLUE);
circlePaint.setStyle(Paint.Style.STROKE);
circlePaint.setStrokeJoin(Paint.Join.MITER);
circlePaint.setStrokeWidth(4f);
clearPaint.setColor(Color.WHITE);
mActivity = (AddCanvasActivity) c;
}
@Override
protected void onSizeChanged(int w, int h, int oldw, int oldh) {
Log.d("DrawingView", "OnSizeChanged");
super.onSizeChanged(w, h, oldw, oldh);
mBitmap = Bitmap.createBitmap(w, h, Bitmap.Config.ARGB_8888);
mCanvas = new Canvas(mBitmap);
}
@Override
protected void onDraw(Canvas canvas) {
if(!mActivity.getFinished()) {
Log.d("DrawingView", "OnDraw");
super.onDraw(canvas);
mActivity.getDrawOption();
canvas.drawBitmap(mBitmap, 0, 0, mBitmapPaint);
if (mActivity.getDrawOption() == "pencil" || mActivity.getDrawOption() == "line")
canvas.drawPath(mPath, mActivity.getPaint());
canvas.drawPath(circlePath, circlePaint);
canvas.drawPath(mPreviewPath, mActivity.getPaint());
}
}
private float mX, mY;
private static final float TOUCH_TOLERANCE = 4;
private void touch_start(float x, float y) {
Log.d("DrawingView", "TouchStart");
mStartX = x;
mStartY = y;
mPath.reset();
mPath.moveTo(x, y);
mX = x;
mY = y;
}
private void touch_move(float x, float y) {
Log.d("DrawingView", "TouchMove");
float dx = abs(x - mX);
float dy = abs(y - mY);
if (dx >= TOUCH_TOLERANCE || dy >= TOUCH_TOLERANCE) {
mDistanceX = abs(x - mStartX);
mDistanceY = abs(y - mStartY);
mDistance = (float) sqrt((mDistanceX * mDistanceX) + (mDistanceY * mDistanceY));
mPreviewPath.reset();
switch (mActivity.getDrawOption()) {
case "circle":
mPreviewPath.addCircle(mStartX, mStartY, mDistance, Path.Direction.CW);
break;
case "pencil":
mPath.quadTo(mX, mY, (x + mX) / 2, (y + mY) / 2);
break;
case "ellipse":
mPreviewPath.addOval(mStartX, mStartY, x, y, Path.Direction.CW);
break;
case "line":
mPreviewPath.moveTo(mStartX, mStartY);
mPreviewPath.quadTo(mStartX, mStartY, x, y);
break;
case "rectangle":
if (mStartX > x) {
if (mStartY > y) {
mPreviewPath.addRect(x, y, mStartX, mStartY, Path.Direction.CW);
} else mPreviewPath.addRect(x, mStartY, mStartX, y, Path.Direction.CW);
}
if (mStartY > y) {
mPreviewPath.addRect(mStartX, y, x, mStartY, Path.Direction.CW);
}
mPreviewPath.addRect(mStartX, mStartY, x, y, Path.Direction.CW);
break;
case "text":
//to be done
break;
default:
break;
}
mX = x;
mY = y;
circlePath.reset();
circlePath.addCircle(mX, mY, 30, Path.Direction.CW);
}
}
private void touch_up(float x, float y) {
Log.d("DrawingView", "TouchUp");
mPath.lineTo(mX, mY);
mDistanceX = abs(x - mStartX);
mDistanceY = abs(y - mStartY);
mDistance = (float) sqrt((mDistanceX * mDistanceX) + (mDistanceY * mDistanceY));
Path pa = new Path();
Log.d("State", mActivity.getDrawOption());
Paint mPaint = mActivity.getPaint();
switch (mActivity.getDrawOption()) {
case "circle":
mCanvas.drawCircle(mStartX, mStartY, mDistance, mPaint);
pa.addCircle(mStartX,mStartY,mDistance,Path.Direction.CW);
Log.d("DrawOption", "Circle, Touch up");
Log.d("DrawOption: Dist", Float.toString(mDistance));
Log.d("DrawOption: DistX", Float.toString(mDistanceX));
Log.d("DrawOption: DistY", Float.toString(mDistanceY));
Log.d("DrawOption: mX", Float.toString(mX));
Log.d("DrawOption: mX", Float.toString(mY));
break;
case "rectangle":
mCanvas.drawRect(mStartX, mStartY, x, y, mPaint);
if (mStartX > x) {
if (mStartY > y) {
pa.addRect(x, y, mStartX, mStartY, Path.Direction.CW);
} else pa.addRect(x, mStartY, mStartX, y, Path.Direction.CW);
}
if (mStartY > y) {
pa.addRect(mStartX, y, x, mStartY, Path.Direction.CW);
}
pa.addRect(mStartX, mStartY, x, y, Path.Direction.CW);
break;
case "ellipse":
mCanvas.drawOval(mStartX, mStartY, x, y, mPaint);
pa.addOval(mStartX,mStartY,x,y,Path.Direction.CW);
break;
case "line":
mCanvas.drawLine(mStartX, mStartY, x, y, mPaint);
break;
case "text":
mCanvas.drawText("Text", mX, mY, mPaint);
break;
case "pencil":
mCanvas.drawPath(mPath, mPaint);
pa.addPath(mPath);
break;
default:
Log.d("DrawOption: default", mActivity.getDrawOption());
}
PathInformation pi = new PathInformation(pa, true, mPaint);
Log.d("DV add path b color", Integer.toString(mPaint.getColor()));
mActivity.addPath(pi);
Log.d("DV is content ", Boolean.toString(mActivity.getPathsArray().isContent()));
Log.d("Add Path first content", Integer.toString(mActivity.getPathsArray().getPathInfo(0).getPaint().getColor()));
circlePath.reset();
mPreviewPath.reset();
// commit the path to our offscreen
// mCanvas.drawPath(mPath, mPaint);
// kill this so we don't double draw
mPath.reset();
}
@Override
public boolean onTouchEvent(MotionEvent event) {
if(!mActivity.getFinished()) {
Log.d("ADDCANVAS- DrawingView", "onTouchEvent");
Log.d("TouchEvent true", Float.toString(event.getX()));
Log.d("TouchEvent true", Float.toString(event.getY()));
float x = event.getX();
float y = event.getY();
switch (event.getAction()) {
case MotionEvent.ACTION_DOWN:
touch_start(x, y);
invalidate();
break;
case MotionEvent.ACTION_MOVE:
touch_move(x, y);
invalidate();
break;
case MotionEvent.ACTION_UP:
touch_up(x, y);
invalidate();
break;
}
return true;
}
else {
Log.d("TouchEvent false", Float.toString(event.getX()));
Log.d("TouchEvent false", Float.toString(event.getY()));
return false;
}
}
public void undoLastPath() {
boolean b = mActivity.undoLast();
if(b) {
mCanvas.drawRect(0, 0, mCanvas.getWidth(), mCanvas.getHeight(), clearPaint);
invalidate();
for (int i = 0; i <= mActivity.getPathsArray().getLength(); i++) {
if (mActivity.getPathsArray().getPathInfo(i).getValid() == true) {
mCanvas.drawPath(mActivity.getPathsArray().getPathInfo(i).getPath(), mActivity.getPathsArray().getPathInfo(i).getPaint());
Log.d("Undolastpath paint", Integer.toString(mActivity.getPathsArray().getPathInfo(i).getPaint().getColor()));
Log.d("Undolastpath id",Integer.toString(i));
}
}
invalidate();
}
}
}
更新：添加ShowAllActivity
public class ShowAllActivity extends AppCompatActivity implements OnTouchListener{
private ArrayList<PathsArray> mCanvases;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.view_show_all);
FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.floatingActionButtonShowAll);
mCanvases = new ArrayList<PathsArray>();
fab.setOnTouchListener(this);
GridView gridview = (GridView) findViewById(R.id.gridview_canvas);
gridview.setAdapter(new ImageAdapter(this, mCanvases));
gridview.setOnItemClickListener(new AdapterView.OnItemClickListener() {
public void onItemClick(AdapterView<?> parent, View v,
int position, long id) {
Toast.makeText(ShowAllActivity.this, "" + position,
Toast.LENGTH_SHORT).show();
}
});
Log.d("Activity onCreate", "ShowAllActivity");
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
if (requestCode == 1) {
if (resultCode == RESULT_OK) {
PathsArray pa = (PathsArray) data.getParcelableExtra("pathArray");
if(pa == null) Log.d("pa", "isnull");
mCanvases.add(pa);
//Log.d("onactivityresult", Integer.toString(mCanvases.get(0).getPathInfo(0).getPaint().getColor()));
Log.d("onActivityResult", "added canvas to canvases");
}
}
}
public ArrayList<PathsArray> getCanvases(){return mCanvases;}
@Override
public boolean onTouch(View view, MotionEvent motionEvent) {
Intent intent = new Intent(this.getBaseContext(), AddCanvasActivity.class);
intent.putExtra("message", "Message from First Screen");
startActivityForResult(intent,1);
intent.putExtra("Finished",false);
return true;
}
}
答案 0 :(得分：0)
可能您试图通过Intent传递更多关于活页夹交易所允许的最大数据量，这就是您的Activity无法finish();的原因。 Intent可以传递 1MB 的数据。 mPathsArray的大小可能大于 1MB 。对于大文件，您有三个选项之一：
在Google的帮助下，我发现这篇文章可能对您有所帮助： it.bewares JSON