本文整理了Java中android.graphics.Rect类的一些代码示例，展示了Rect类的具体用法。这些代码示例主要来源于Github/Stackoverflow/Maven等平台，是从一些精选项目中提取出来的代码，具有较强的参考意义，能在一定程度帮忙到你。Rect类的具体详情如下：
包路径：android.graphics.Rect
类名称：Rect

Rect介绍

[英]Rect holds four integer coordinates for a rectangle. The rectangle is represented by the coordinates of its 4 edges (left, top, right bottom). These fields can be accessed directly. Use width() and height() to retrieve the rectangle's width and height. Note: most methods do not check to see that the coordinates are sorted correctly (i.e. left Note that the right and bottom coordinates are exclusive. This means a Rect being drawn untransformed onto a android.graphics.Canvas will draw into the column and row described by its left and top coordinates, but not those of its bottom and right.
[中]Rect保存矩形的四个整数坐标。矩形由其4条边（左、上、右下）的坐标表示。这些字段可以直接访问。使用width（）和height（）检索矩形的宽度和高度。注意：大多数方法都不会检查坐标是否正确排序（即，左侧注意，右侧和底部坐标是互斥的。这意味着未经转换绘制到android.graphics.Canvas上的Rect将绘制到由其左侧和顶部坐标描述的列和行中，但不会绘制其底部和右侧坐标。

代码示例

代码示例来源：origin: androidquery/androidquery

private static Bitmap getRoundedCornerBitmap(Bitmap bitmap, int pixels) {
    
    Bitmap output = Bitmap.createBitmap(bitmap.getWidth(), bitmap.getHeight(), Config.ARGB_8888);
    Canvas canvas = new Canvas(output);

    final int color = 0xff424242;
    final Paint paint = new Paint();
    final Rect rect = new Rect(0, 0, bitmap.getWidth(), bitmap.getHeight());
    final RectF rectF = new RectF(rect);
    final float roundPx = pixels;

    paint.setAntiAlias(true);
    canvas.drawARGB(0, 0, 0, 0);
    paint.setColor(color);
    canvas.drawRoundRect(rectF, roundPx, roundPx, paint);

    paint.setXfermode(new PorterDuffXfermode(Mode.SRC_IN));
    canvas.drawBitmap(bitmap, rect, rect, paint);

    return output;
  }
}

代码示例来源：origin: stackoverflow.com

protected void onDraw(Canvas canvas){
  final String s = "Hello. I'm some text!";
  Paint p = new Paint();
  Rect bounds = new Rect();
  p.setTextSize(60);
  p.getTextBounds(s, 0, s.length(), bounds);
  float mt = p.measureText(s);
  int bw = bounds.width();
  Log.i("LCG", String.format(
    "measureText %f, getTextBounds %d (%s)",
    mt,
    bw, bounds.toShortString())
  );
  bounds.offset(0, -bounds.top);
  p.setStyle(Style.STROKE);
  canvas.drawColor(0xff000080);
  p.setColor(0xffff0000);
  canvas.drawRect(bounds, p);
  p.setColor(0xff00ff00);
  canvas.drawText(s, 0, bounds.bottom, p);
}

代码示例来源：origin: naman14/Timber

private BitmapDrawable createFloatingBitmap(View v) {
  floatingItemStatingBounds = new Rect(v.getLeft(), v.getTop(), v.getRight(), v.getBottom());
  floatingItemBounds = new Rect(floatingItemStatingBounds);
  Bitmap bitmap = Bitmap.createBitmap(floatingItemStatingBounds.width(),
      floatingItemStatingBounds.height(), Bitmap.Config.ARGB_8888);
  Canvas canvas = new Canvas(bitmap);
  v.draw(canvas);
  BitmapDrawable retDrawable = new BitmapDrawable(v.getResources(), bitmap);
  retDrawable.setBounds(floatingItemBounds);
  return retDrawable;
}

代码示例来源：origin: stackoverflow.com

Rect bounds = new Rect();
Paint textPaint = textView.getPaint();
textPaint.getTextBounds(text, 0, text.length(), bounds);
int height = bounds.height();
int width = bounds.width();

代码示例来源：origin: PhilJay/MPAndroidChart

/**
 * calculates the approximate size of a text, depending on a demo text
 * avoid repeated calls (e.g. inside drawing methods)
 *
 * @param paint
 * @param demoText
 * @param outputFSize An output variable, modified by the function.
 */
public static void calcTextSize(Paint paint, String demoText, FSize outputFSize) {
  Rect r = mCalcTextSizeRect;
  r.set(0,0,0,0);
  paint.getTextBounds(demoText, 0, demoText.length(), r);
  outputFSize.width = r.width();
  outputFSize.height = r.height();
}

代码示例来源：origin: PhilJay/MPAndroidChart

/**
 * calculates the approximate height of a text, depending on a demo text
 * avoid repeated calls (e.g. inside drawing methods)
 *
 * @param paint
 * @param demoText
 * @return
 */
public static int calcTextHeight(Paint paint, String demoText) {
  Rect r = mCalcTextHeightRect;
  r.set(0,0,0,0);
  paint.getTextBounds(demoText, 0, demoText.length(), r);
  return r.height();
}

代码示例来源：origin: navasmdc/MaterialDesignLibrary

public Bitmap cropCircle(Bitmap bitmap) {
  Bitmap output = Bitmap.createBitmap(bitmap.getWidth(),
      bitmap.getHeight(), Config.ARGB_8888);
  Canvas canvas = new Canvas(output);
  final int color = 0xff424242;
  final Paint paint = new Paint();
  final Rect rect = new Rect(0, 0, bitmap.getWidth(), bitmap.getHeight());
  paint.setAntiAlias(true);
  canvas.drawARGB(0, 0, 0, 0);
  paint.setColor(color);
  canvas.drawCircle(bitmap.getWidth() / 2, bitmap.getHeight() / 2,
      bitmap.getWidth()/2, paint);
  paint.setXfermode(new PorterDuffXfermode(Mode.SRC_IN));
  canvas.drawBitmap(bitmap, rect, rect, paint);
  return output;
}

代码示例来源：origin: stackoverflow.com

Paint paint = new Paint();
paint.setStyle(Style.FILL);
paint.setColor(Color.WHITE);
paint.setTypeface(tf);
paint.setTextAlign(Align.CENTER);
paint.setTextSize(convertToPixels(context, 11));
Rect textRect = new Rect();
paint.getTextBounds(text, 0, text.length(), textRect);
if(textRect.width() >= (canvas.getWidth() - 4))     //the padding on either sides is considered as 4, so as to appropriately fit in the text
  paint.setTextSize(convertToPixels(context, 7));        //Scaling needs to be used for different dpi's
int xPos = (canvas.getWidth() / 2) - 2;     //-2 is for regulating the x position offset
int yPos = (int) ((canvas.getHeight() / 2) - ((paint.descent() + paint.ascent()) / 2)) ;  
canvas.drawText(text, xPos, yPos, paint);
final float conversionScale = context.getResources().getDisplayMetrics().density;

代码示例来源：origin: stackoverflow.com

Bitmap bitmap = b.copy(Bitmap.Config.ARGB_8888, true);
Bitmap sbmp;
if (bmp.getWidth() != radius || bmp.getHeight() != radius) {
  float smallest = Math.min(bmp.getWidth(), bmp.getHeight());
  float factor = smallest / radius;
final Paint paint = new Paint();
final Rect rect = new Rect(0, 0, radius, radius);
paint.setAntiAlias(true);
paint.setFilterBitmap(true);
paint.setDither(true);
canvas.drawARGB(0, 0, 0, 0);

代码示例来源：origin: stackoverflow.com

Resources resources = mContext.getResources();
 float scale = resources.getDisplayMetrics().density;
 Bitmap bitmap = BitmapFactory.decodeResource(resources, resourceId);
 android.graphics.Bitmap.Config bitmapConfig =   bitmap.getConfig();
 bitmap = bitmap.copy(bitmapConfig, true);
 paint.setColor(Color.rgb(110,110, 110));
 paint.setTextSize((int) (12 * scale));
 paint.setShadowLayer(1f, 0f, 1f, Color.DKGRAY);
 Rect bounds = new Rect();
 paint.getTextBounds(mText, 0, mText.length(), bounds);
 int x = (bitmap.getWidth() - bounds.width())/6;
 int y = (bitmap.getHeight() + bounds.height())/5;
canvas.drawText(mText, x * scale, y * scale, paint);

代码示例来源：origin: scwang90/SmartRefreshLayout

final Drawable drawable = PathsDrawable.this;
final Rect bounds = drawable.getBounds();
final int width = bounds.width();
final int height = bounds.height();
if (mPaint.getAlpha() == 0xFF) {
  canvas.save();
  canvas.translate(bounds.left-mStartX, bounds.top-mStartY);
  if (mPaths != null) {
    for (int i = 0; i < mPaths.size(); i++) {
      if (mColors != null && i < mColors.size()) {
        mPaint.setColor(mColors.get(i));
      canvas.drawPath(mPaths.get(i), mPaint);
    mPaint.setAlpha(0xFF);
  canvas.restore();
  createCachedBitmapIfNeeded(width, height);
  if (mCacheDirty) {
    mCachedBitmap.eraseColor(Color.TRANSPARENT);
    Canvas tmpCanvas = new Canvas(mCachedBitmap);
    drawCachedBitmap(tmpCanvas);

代码示例来源：origin: rey5137/material

@Override
public void draw(Canvas canvas) {
  int saveCount = canvas.save();
  Rect bounds = getBounds();
  float halfHeight = bounds.height() / 2f;
  mPaint.setShader(null);
  mPaint.setColor(mBackgroundColor);
  mRect.set(1, 0, bounds.height() + 1, bounds.height());
  canvas.drawArc(mRect, 90, 180, true, mPaint);
  mRect.set(bounds.width() - bounds.height(), 0, bounds.width(), bounds.height());
  canvas.drawArc(mRect, 270, 180, true, mPaint);
  mRect.set(halfHeight, 0, bounds.width() - halfHeight, bounds.height());
  canvas.drawRect(mRect, mPaint);
  if(mBitmap != null){
    mPaint.setShader(mBitmapShader);
    canvas.drawCircle(halfHeight, halfHeight, halfHeight, mPaint);
  }
  if(mContactName != null && mBoringLayout != null) {
    canvas.translate(bounds.height() + mPaddingLeft, (bounds.height() - mBoringLayout.getHeight()) / 2f);
    mBoringLayout.draw(canvas);
  }
  canvas.restoreToCount(saveCount);
}

代码示例来源：origin: bumptech/glide

private Bitmap createSolidRedBitmap(int width, int height) {
  Bitmap result = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);
  Canvas canvas = new Canvas(result);
  Paint paint = new Paint();
  paint.setColor(Color.RED);
  Rect rect = new Rect(0, 0, width, height);
  canvas.drawRect(rect, paint);
  return result;
 }
}

代码示例来源：origin: stackoverflow.com

Paint paint = new Paint();
Rect r = new Rect(10, 10, 200, 100);

@Override
public void onDraw(Canvas canvas) {
  // fill
  paint.setStyle(Paint.Style.FILL);
  paint.setColor(Color.MAGENTA); 
  canvas.drawRect(r, paint);

  // border
  paint.setStyle(Paint.Style.STROKE);
  paint.setColor(Color.BLACK);
  canvas.drawRect(r, paint);
}

代码示例来源：origin: ZieIony/Carbon

private void drawChecked(@NonNull Canvas canvas, float radius) {
  Rect bounds = getBounds();
  paint.setShader(null);
  canvas.drawBitmap(uncheckedBitmap, bounds.left, bounds.top, paint);
  maskCanvas.drawColor(0xffffffff);
  maskPaint.setXfermode(porterDuffClear);
  maskCanvas.drawCircle(maskBitmap.getWidth() / 2 + bounds.width() * offset.x, maskBitmap.getHeight() / 2 + bounds.height() * offset.y, radius, maskPaint);
  maskPaint.setXfermode(porterDuffSrcIn);
  maskCanvas.drawBitmap(filledBitmap, 0, 0, maskPaint);
  canvas.drawBitmap(maskBitmap, bounds.left, bounds.top, paint);
  paint.setShader(checkedShader);
  canvas.drawCircle(bounds.centerX() + bounds.width() * offset.x, bounds.centerY() + bounds.height() * offset.y, radius, paint);
}

代码示例来源：origin: stackoverflow.com

private Rect rect;    // Variable rect to hold the bounds of the view

public boolean onTouch(View v, MotionEvent event) {
  if(event.getAction() == MotionEvent.ACTION_DOWN){
    // Construct a rect of the view's bounds
    rect = new Rect(v.getLeft(), v.getTop(), v.getRight(), v.getBottom());

  }
  if(event.getAction() == MotionEvent.ACTION_MOVE){
    if(!rect.contains(v.getLeft() + (int) event.getX(), v.getTop() + (int) event.getY())){
      // User moved outside bounds
    }
  }
  return false;
}

代码示例来源：origin: stackoverflow.com

@Override
public boolean dispatchTouchEvent(MotionEvent ev) {
  Rect dialogBounds = new Rect();
  getWindow().getDecorView().getHitRect(dialogBounds);

  if (!dialogBounds.contains((int) ev.getX(), (int) ev.getY())) {
    // Tapped outside so we finish the activity
    this.finish();
  }
  return super.dispatchTouchEvent(ev);
}

代码示例来源：origin: android-cjj/Android-MaterialRefreshLayout

private void init() {
  Log.i(Tag, "init");
  mSunRadius = changeDp(DEFAULT_SUN_RADIUS);
  mEyesRadius = changeDp(DEFAULT_EYES_RADIUS);
  //圆的配置
  mCirclePaint = new Paint(Paint.ANTI_ALIAS_FLAG);
  mCirclePaint.setColor(Color.RED);
  mCirclePaint.setStyle(Paint.Style.FILL);
  debugRect = new Rect();
  mouthRect = new RectF();
}

代码示例来源：origin: robolectric/robolectric

@Test
public void shouldDescribeBitmapDrawing_withDestinationRect() throws Exception {
 Canvas canvas = new Canvas(targetBitmap);
 canvas.drawBitmap(imageBitmap, new Rect(1,2,3,4), new Rect(5,6,7,8), new Paint());
 assertEquals("Bitmap for file:/an/image.jpg at (5,6) with height=2 and width=2 taken from Rect(1, 2 - 3, 4)", shadowOf(canvas).getDescription());
}

代码示例来源：origin: airbnb/lottie-android

@Override public void drawLayer(@NonNull Canvas canvas, Matrix parentMatrix, int parentAlpha) {
 Bitmap bitmap = getBitmap();
 if (bitmap == null || bitmap.isRecycled()) {
  return;
 }
 float density = Utils.dpScale();
 paint.setAlpha(parentAlpha);
 if (colorFilterAnimation != null) {
  paint.setColorFilter(colorFilterAnimation.getValue());
 }
 canvas.save();
 canvas.concat(parentMatrix);
 src.set(0, 0, bitmap.getWidth(), bitmap.getHeight());
 dst.set(0, 0, (int) (bitmap.getWidth() * density), (int) (bitmap.getHeight() * density));
 canvas.drawBitmap(bitmap, src, dst , paint);
 canvas.restore();
}