Android：免费裁剪图像

概述我想在 Image上做自由裁剪风格…… 图像可以来自图库,也可以来自相机…… 对此有什么解决方案吗？ >在图库中加载图库或相机中的图像(使用画布绘制图像) public class SomeView extends View implements OnTouchListener { private Paint paint; public static List<Point> poi 我想在 Image上做自由裁剪风格……
图像可以来自图库,也可以来自相机……

对此有什么解决方案吗？

解决方法 >在图库中加载图库或相机中的图像(使用画布绘制图像)

public class SomeVIEw extends VIEw implements OntouchListener {    private Paint paint;    public static List<Point> points;    int disT = 2;    boolean flgPathDraw = true;    Point mfirstpoint = null;    boolean bfirstpoint = false;    Point mlastpoint = null;    Bitmap bitmap = BitmapFactory.decodeResource(getResources(),R.drawable.gallery_12);    Context mContext;    public SomeVIEw(Context c) {        super(c);        mContext = c;        setFocusable(true);        setFocusableIntouchMode(true);        paint = new Paint(Paint.ANTI_AliAS_FLAG);        paint.setStyle(Paint.Style.stroke);        paint.setPathEffect(new DashPathEffect(new @R_301_5987@[] { 10,20 },0));        paint.setstrokeWIDth(5);        paint.setcolor(color.WHITE);        this.setontouchListener(this);        points = new ArrayList<Point>();        bfirstpoint = false;    }    public SomeVIEw(Context context,AttributeSet attrs) {        super(context,attrs);        mContext = context;        setFocusable(true);        setFocusableIntouchMode(true);        paint = new Paint(Paint.ANTI_AliAS_FLAG);        paint.setStyle(Paint.Style.stroke);        paint.setstrokeWIDth(2);        paint.setcolor(color.WHITE);        this.setontouchListener(this);        points = new ArrayList<Point>();        bfirstpoint = false;    }    public voID onDraw(Canvas canvas) {        canvas.drawBitmap(bitmap,null);        Path path = new Path();        boolean first = true;        for (int i = 0; i < points.size(); i += 2) {            Point point = points.get(i);            if (first) {                first = false;                path.moveto(point.x,point.y);            } else if (i < points.size() - 1) {                Point next = points.get(i + 1);                path.quadTo(point.x,point.y,next.x,next.y);            } else {                mlastpoint = points.get(i);                path.lineto(point.x,point.y);            }        }        canvas.drawPath(path,paint);    }    public boolean ontouch(VIEw vIEw,MotionEvent event) {        // if(event.getAction() != MotionEvent.ACTION_DOWN)        // return super.ontouchEvent(event);        Point point = new Point();        point.x = (int) event.getX();        point.y = (int) event.getY();        if (flgPathDraw) {            if (bfirstpoint) {                if (comparepoint(mfirstpoint,point)) {                    // points.add(point);                    points.add(mfirstpoint);                        flgPathDraw = false;                                        showcropdialog();                } else {                    points.add(point);                }            } else {                points.add(point);            }            if (!(bfirstpoint)) {                mfirstpoint = point;                bfirstpoint = true;            }        }        invalIDate();        Log.e("Hi  ==>","Size: " + point.x + " " + point.y);        if (event.getAction() == MotionEvent.ACTION_UP) {            Log.d("Action uP*******~~~~~~~>>>>","called");            mlastpoint = point;            if (flgPathDraw) {                if (points.size() > 12) {                    if (!comparepoint(mfirstpoint,mlastpoint)) {                        flgPathDraw = false;                        points.add(mfirstpoint);                        showcropdialog();                    }                }            }        }        return true;    }    private boolean comparepoint(Point first,Point current) {        int left_range_x = (int) (current.x - 3);        int left_range_y = (int) (current.y - 3);        int right_range_x = (int) (current.x + 3);        int right_range_y = (int) (current.y + 3);        if ((left_range_x < first.x && first.x < right_range_x)                && (left_range_y < first.y && first.y < right_range_y)) {            if (points.size() < 10) {                return false;            } else {                return true;            }        } else {            return false;        }    }    public voID fillinPartofPath() {        Point point = new Point();        point.x = points.get(0).x;        point.y = points.get(0).y;        points.add(point);        invalIDate();    }    public voID resetVIEw() {        points.clear();        paint.setcolor(color.WHITE);        paint.setStyle(Style.stroke);        flgPathDraw = true;        invalIDate();    }    private voID showcropdialog() {        DialogInterface.OnClickListener dialogClickListener = new DialogInterface.OnClickListener() {            @OverrIDe            public voID onClick(DialogInterface dialog,int which) {                Intent intent;                switch (which) {                case DialogInterface.button_POSITIVE:                    // Yes button clicked                    // bfirstpoint = false;                    intent = new Intent(mContext,CropActivity.class);                    intent.putExtra("crop",true);                    mContext.startActivity(intent);                    break;                case DialogInterface.button_NEGATIVE:                    // No button clicked                    intent = new Intent(mContext,false);                    mContext.startActivity(intent);                    bfirstpoint = false;                    // resetVIEw();                    break;                }            }        };        AlertDialog.Builder builder = new AlertDialog.Builder(mContext);        builder.setMessage("Do you Want to save Crop or Non-crop image?")                .setPositivebutton("Crop",dialogClickListener)                .setNegativebutton("Non-crop",dialogClickListener).show()                .setCancelable(false);    }   }class Point {    public @R_301_5987@ dy;    public @R_301_5987@ dx;    @R_301_5987@ x,y;@OverrIDepublic String toString() {    return x + "," + y;    }}

> MainActivity调用SomevIEw来绘制/加载图像

public class MainActivity_ extends Activity {@OverrIDeprotected voID onCreate(Bundle savedInstanceState) {    super.onCreate(savedInstanceState);}@OverrIDeprotected voID onResume() {    super.onResume();    setContentVIEw(new SomeVIEw(MainActivity_.this));}}

> CropActivity：在位图上加载裁剪图像.

public class CropActivity extends Activity {    ImageVIEw compositeImageVIEw;    boolean crop;    @OverrIDe    protected voID onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentVIEw(R.layout.cropvIEw);        Bundle extras = getIntent().getExtras();        if (extras != null) {            crop = extras.getBoolean("crop");        }        int wIDthOfscreen = 0;        int heightOfScreen = 0;        displayMetrics dm = new displayMetrics();        try {            getwindowManager().getDefaultdisplay().getMetrics(dm);        } catch (Exception ex) {        }        wIDthOfscreen = dm.wIDthPixels;        heightOfScreen = dm.heightPixels;        compositeImageVIEw = (ImageVIEw) findVIEwByID(R.ID.our_imagevIEw);        Bitmap bitmap2 = BitmapFactory.decodeResource(getResources(),R.drawable.gallery_12);        Bitmap resultingImage = Bitmap.createBitmap(wIDthOfscreen,heightOfScreen,bitmap2.getConfig());        Canvas canvas = new Canvas(resultingImage);        Paint paint = new Paint();        paint.setAntiAlias(true);        Path path = new Path();        for (int i = 0; i < SomeVIEw.points.size(); i++) {            path.lineto(SomeVIEw.points.get(i).x,SomeVIEw.points.get(i).y);        }        canvas.drawPath(path,paint);        if (crop) {            paint.setXfermode(new PorterDuffXfermode(Mode.SRC_IN));        } else {            paint.setXfermode(new PorterDuffXfermode(Mode.SRC_OUT));        }        canvas.drawBitmap(bitmap2,paint);        compositeImageVIEw.setimageBitmap(resultingImage);    }}

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