如何在android中开发自定义裁剪矩形？

我正在开发一个需要裁剪图像的应用程序。但这种图像裁剪应该只发生在我的活动上，这样我就不能使用安卓系统的默认图像裁剪概念，图像将出现在另一个用户可以裁剪的视图上

我需要的是创建自定义图像裁剪器矩形

我尝试了很久，但没有运气。如果有人能帮忙，我会很高兴的

谢谢我的主要活动

public class MainActivity extends Activity {

private DragRectView view;
private ImageView original;

// private ImageView croppedImage;

/**
 * 
 */
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    view = (DragRectView) findViewById(R.id.dragRect);
    original = (ImageView) findViewById(R.id.image);
    // croppedImage = (ImageView) findViewById(R.id.crop_image);
    if (null != view) {
        view.setOnUpCallback(new DragRectView.OnUpCallback() {
            @Override
            public void onRectFinished(final Rect rect) {
                Toast.makeText(
                        getApplicationContext(),
                        "Rect is (" + rect.left + ", " + rect.top + ", "
                                + rect.right + ", " + rect.bottom + ")",
                        Toast.LENGTH_LONG).show();
                Bitmap bitmap1 = Bitmap.createScaledBitmap(
                        ((BitmapDrawable) original.getDrawable())
                                .getBitmap(), original.getWidth(), original
                                .getHeight(), false);
                System.out.println(rect.height() + "    "
                        + bitmap1.getHeight() + "      " + rect.width()
                        + "    " + bitmap1.getWidth());
                if (rect.height() <= bitmap1.getHeight()
                        && rect.width() <= bitmap1.getWidth()) {
                    Bitmap bitmap = Bitmap.createBitmap(bitmap1,
                            view.getLeft(), view.getTop(), view.getWidth(),
                            view.getHeight());
                    System.out
                            .println("MainActivity.onCreate(...).new OnUpCallback() {...}.onRectFinished() if true");
                    Intent intent = new Intent(MainActivity.this,
                            CropImageActivity.class);
                    intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
                    intent.putExtra("cropimage", bitmap);
                    startActivity(intent);
                    System.out.println("MainActivity.onCreate() ");
                }
            }
        });
    }
}
}

拖网角

public class DragRectView extends View {
private Paint mRectPaint;

private int mStartX = 0;
private int mStartY = 0;
private int mEndX = 0;
private int mEndY = 0;
private boolean mDrawRect = false;
private TextPaint mTextPaint = null;

private OnUpCallback mCallback = null;

public interface OnUpCallback {
    void onRectFinished(Rect rect);
}

public DragRectView(final Context context) {
    super(context);
    init();
}

public DragRectView(final Context context, final AttributeSet attrs) {
    super(context, attrs);
    init();
}

public DragRectView(final Context context, final AttributeSet attrs,
        final int defStyle) {
    super(context, attrs, defStyle);
    init();
}

/**
 * Sets callback for up
 * 
 * @param callback
 *            {@link OnUpCallback}
 */
public void setOnUpCallback(OnUpCallback callback) {
    mCallback = callback;
}

/**
 * Inits internal data
 */
private void init() {
    mRectPaint = new Paint();
    mRectPaint.setColor(Color.GREEN);
    mRectPaint.setStyle(Paint.Style.STROKE);
    mRectPaint.setStrokeWidth(5); 

    mTextPaint = new TextPaint();
    mTextPaint.setColor(Color.MAGENTA);
    mTextPaint.setTextSize(20);
}

@Override
public boolean onTouchEvent(final MotionEvent event) {

    switch (event.getAction()) {
    case MotionEvent.ACTION_DOWN:
        mDrawRect = false;
        mStartX = (int) event.getX();
        mStartY = (int) event.getY();
        invalidate();
        break;

    case MotionEvent.ACTION_MOVE:
        final int x = (int) event.getX();
        final int y = (int) event.getY();
        if (!mDrawRect || Math.abs(x - mEndX) > 5
                || Math.abs(y - mEndY) > 5) {
            mEndX = x;
            mEndY = y;
            invalidate();
        }
        mDrawRect = true;
        break;

    case MotionEvent.ACTION_UP:
        if (mCallback != null) {
            mCallback.onRectFinished(new Rect(Math.min(mStartX, mEndX),
                    Math.min(mStartY, mEndY), Math.max(mEndX, mStartX),
                    Math.max(mEndY, mStartX)));
        }
        invalidate();
        break;

    default:
        break;
    }

    return true;
}

@Override
protected void onDraw(final Canvas canvas) {
    super.onDraw(canvas);
    if (mDrawRect) {
        canvas.drawRect(Math.min(mStartX, mEndX), Math.min(mStartY, mEndY),
                Math.max(mEndX, mStartX), Math.max(mEndY, mStartY),
                mRectPaint);
        canvas.drawText(
                "  (" + Math.abs(mStartX - mEndX) + ", "
                        + Math.abs(mStartY - mEndY) + ")",
                Math.max(mEndX, mStartX), Math.max(mEndY, mStartY),
                mTextPaint);
    }
}
}

维护布局

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/root"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@android:color/background_dark"
android:orientation="vertical"
android:weightSum="2" >

<ImageView
    android:id="@+id/image"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:scaleType="fitXY"
    android:src="@drawable/image" />

<com.afbb.imagecrop.DragRectView
    android:id="@+id/dragRect"
    android:layout_width="match_parent"
    android:layout_height="match_parent" />

<!--
     <ImageView
    android:id="@+id/crop_image"
    android:layout_width="fill_parent"
    android:layout_height="match_parent"
    android:layout_weight="1"
    android:scaleType="fitXY"
    android:src="@drawable/image" />
-->

</RelativeLayout>

 <?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" >

<ImageView
    android:id="@+id/crop_image"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:src="@drawable/ic_launcher" />

</FrameLayout>

Cropacity布局

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/root"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@android:color/background_dark"
android:orientation="vertical"
android:weightSum="2" >

<ImageView
    android:id="@+id/image"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:scaleType="fitXY"
    android:src="@drawable/image" />

<com.afbb.imagecrop.DragRectView
    android:id="@+id/dragRect"
    android:layout_width="match_parent"
    android:layout_height="match_parent" />

<!--
     <ImageView
    android:id="@+id/crop_image"
    android:layout_width="fill_parent"
    android:layout_height="match_parent"
    android:layout_weight="1"
    android:scaleType="fitXY"
    android:src="@drawable/image" />
-->

</RelativeLayout>

 <?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" >

<ImageView
    android:id="@+id/crop_image"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:src="@drawable/ic_launcher" />

</FrameLayout>

---

它可能会帮助您……

您可以尝试使用此功能进行灵活的定制裁剪

  Intent intent = new Intent("com.android.camera.action.CROP");
  intent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
  intent.addFlags(Intent.FLAG_GRANT_WRITE_URI_PERMISSION);            
  intent.setType("image/*");
  intent.putExtra("aspectX", 0);
  intent.putExtra("aspectY", 0);
  intent.putExtra("outputY", 600);
  intent.putExtra("outputX", 600);
  intent.putExtra("scale", "true);

---

. 可以在stackoverflow上搜索更多的例子吗？我为我的一个项目做了这个和这个裁剪工具。你好，Rajesh，谢谢分享例子。你能告诉我你是如何在裁剪器中一幅又一幅地裁剪图像的吗？（裁剪工具）findViewById（R.id.crop_工具））.setmTargetImage（BitmapFactory.decodeResource（getResources（），R.drawable.arrahman））；你好，Rajesh，谢谢下面为我编写的代码imageview.setImageBitmap（cropingTool.cropedBitmap）；Hello@anand谢谢-你能用布局分享你的完整项目吗？所有的布局都很完美，但它没有在cropimageactivity类中显示裁剪图像。请帮我做这个。感谢

Bitmap Bitmap=Bitmap.createBitmap（bitmap1，view.getLeft（），view.getTop（），view.getWidth（），view.getHeight（））

part帮助我解决了问题-根据提供的裁剪矩形显示图像。谢谢@Aba什么是视图？view.getLeft（）@MSaudi在他的

main活动中
code，
view=（DragRectView）findViewById（R.id.dragRect）