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我想創建一個窗口，用戶可以從圖像的邊界出去但路徑仍在繼續。Android：在由ImageView中的位圖確定的框架內繪製
我有這樣的代碼爲我的活動
public class PaintActivity extends Activity {
PaintView maskView;
ImageView imagen;
Bitmap bitmap;
Bitmap mask;
int bitmapWidth, bitmapHeight;
public int[] getBitmapMinCoords() {
float[] minCoordF = {0, 0};
Matrix matriz = imagen.getImageMatrix();
matriz.mapPoints(minCoordF);
int[] minCoords = new int[2];
minCoords[0] = Math.round(minCoordF[0]);
minCoords[1] = Math.round(minCoordF[1]);
return minCoords;
}
public int[] getBitmapMaxCoords() {
float[] maxCoordF = {bitmapWidth, bitmapHeight};
Matrix matriz = imagen.getImageMatrix();
matriz.mapPoints(maxCoordF);
int[] maxCoords = new int[2];
maxCoords[0] = Math.round(maxCoordF[0]);
maxCoords[1] = Math.round(maxCoordF[1]);
return maxCoords;
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.paint);
imagen = (ImageView) findViewById(R.id.image_paint);
maskView = (PaintView) findViewById(R.id.mask_paint);
String imagePath = "/sdcard/images/NewOrleans.gif";
bitmap = BitmapFactory.decodeFile(imagePath);
imagen.setImageBitmap(bitmap);
bitmapWidth = bitmap.getWidth();
bitmapHeight = bitmap.getHeight();
ViewTreeObserver vto = imagen.getViewTreeObserver();
vto.addOnGlobalLayoutListener(new OnGlobalLayoutListener() {
public void onGlobalLayout() {
Matrix matrizTransformacion = imagen.getImageMatrix();
float[] values = new float[9];
if (matrizTransformacion != null) {
matrizTransformacion.getValues(values);
Log.i(PaintActivity.class.toString() + ".globalListener()", "La matriz tiene valores: " + matrizTransformacion.toString());
}
int[] minC = getBitmapMinCoords();
int[] maxC = getBitmapMaxCoords();
Log.i("Listener MinCOORDS (0,0)", minC[0] + ", " + minC[1]);
Log.i("Listener MaxCOORDS (" + bitmapWidth + "," + bitmapHeight + ")", maxC[0] + ", " + maxC[1]);
Bitmap mapaBits = Bitmap.createBitmap(bitmapWidth, bitmapHeight, Bitmap.Config.ARGB_8888);
Canvas canvas = new Canvas(mapaBits);
maskView.layout(minC[0], minC[1], maxC[0], maxC[1]);
maskView.draw(canvas);
maskView.refreshDrawableState();
imagen.getViewTreeObserver().removeGlobalOnLayoutListener(this);
}
});
}
Bitmap getMaskBitmap(View view) {
Matrix matrizTransformacion = imagen.getImageMatrix();
float[] values = new float[9];
if (matrizTransformacion != null) {
matrizTransformacion.getValues(values);
Log.i(PaintActivity.class.toString() + ".onStart()", "La matriz tiene valores: " + matrizTransformacion.toString());
}
Bitmap mapaBits = Bitmap.createBitmap(Math.round(bitmapWidth*values[0]), Math.round(bitmapHeight*values[4]), Bitmap.Config.ARGB_8888);
Canvas canvas = new Canvas(mapaBits);
int[] minCoords = getBitmapMinCoords();
int[] maxCoords = getBitmapMaxCoords();
view.layout(minCoords[0], minCoords[1], maxCoords[0], maxCoords[1]);
view.draw(canvas);
return mapaBits;
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
MenuInflater menuInflater = getMenuInflater();
menuInflater.inflate(R.menu.inpainting_color_selection_menu, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case R.id.inpainting_color_accept_opt:
ProgressDialog pd = ProgressDialog.show(this, "", "Guardando imagen");
Bitmap mascara = getMaskBitmap(maskView);
// GUARDANDO BITMAP EN HDD
try {
String filename = "/sdcard/PhotoRestore/mask.png";
File file = new File(filename);
FileOutputStream out = new FileOutputStream(file);
mascara.compress(Bitmap.CompressFormat.PNG, 100, out);
} catch (Exception e) {
e.printStackTrace();
}
pd.dismiss();
return true;
default:
return super.onOptionsItemSelected(item);
}
}
}
這是我的PaintView
public class PaintView extends View {
float previousX = -1;
float previousY = -1;
float currentX = -1;
float currentY = -1;
PaintActivity activity;
Path path;
Paint paintLine = new Paint();
public PaintView(Context context) {
super(context);
init();
}
public PaintView(Context context, AttributeSet attrs) {
super(context, attrs);
init();
}
public PaintView(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
init();
}
private void init() {
path = new Path();
activity = (PaintActivity) getContext();
paintLine = new Paint(Paint.ANTI_ALIAS_FLAG);
paintLine.setStyle(Paint.Style.STROKE);
paintLine.setStrokeWidth(10);
paintLine.setColor(Color.GREEN);
paintLine.setAlpha(150);
}
public void onDraw(Canvas canvas) {
canvas.drawPath(path, paintLine);
}
@Override
public boolean onTouchEvent(final MotionEvent event) {
currentX = event.getX();
currentY = event.getY();
switch (event.getAction()) {
case MotionEvent.ACTION_DOWN:
path.moveTo(currentX, currentY);
break;
case MotionEvent.ACTION_MOVE:
path.quadTo(previousX, previousY, currentX, currentY);
break;
case MotionEvent.ACTION_UP:
path.quadTo(previousX, previousY, currentX, currentY);
break;
}
previousX = currentX;
previousY = currentY;
postInvalidate();
return true;
}
}
的代碼，這是我的XML視圖
<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<ImageView
android:id="@+id/image_paint"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:contentDescription="@string/hola" />
<com.paint.PaintView
android:id="@+id/mask_paint"
android:layout_width="match_parent"
android:layout_height="match_parent" />
</FrameLayout>
當我按下按鈕我在菜單中添加了保存圖像的內存，屏幕繼續存在，但現在我已經有了邊框。遠離邊界的路徑會繼續繪製，但它會在黑色表面下被遮擋，路徑不會被切斷，這就是我想要在活動開始時出現的情況。
我試圖在活動的'onCreate（）'方法中做同樣的事情（在全局佈局偵聽器中），但它不運行。
有人可以幫助我嗎？
首先，謝謝了！