[英]Image is going out of the screen in android
I draw a picture by using BitmapFactory...The Content is The picture will listen the accelerometer.. and move according to that...i write the code and it working perfectly...but the image is going out of the screen...the picture should be in the screen and visible to the user at all times.... 我通过使用BitmapFactory绘制图片...内容为图片将监听加速度计..并根据该图片移动...我编写了代码,它运行得很好...但是图像不在屏幕上。图片应显示在屏幕上,并始终对用户可见。
Please tell me how to solve this... 请告诉我如何解决这个问题...
mWidth = metrics.widthPixels;
mHeight = metrics.heightPixels;
float mRange = s.getMaximumRange();
//
// Convert MetersToPixels
// metersToPixels = mWidth / .0254f
//
float startX = mWidth / (0.0254f * mRange);
float startY = mHeight / (0.0254f * mRange);
Canvas canvas = ourHolder.lockCanvas();
canvas.drawColor(Color.WHITE);
float mPosY = sensorY * startY;
float mPosX = sensorX * startX;
if (mPosX > mHorizontalBound) {
mPosX = mHorizontalBound;
}
if (mPosY > mVerticalBound) {
mPosY = mVerticalBound;
}
canvas.drawBitmap(betty, mPosY, mPosX, null);
ourHolder.unlockCanvasAndPost(canvas);
}
@Override
protected void onSizeChanged(int w, int h, int oldw, int oldh) {
// TODO Auto-generated method stub
super.onSizeChanged(w, h, oldw, oldh);
mXOrigin = (w - betty.getWidth()) * 0.5f;
mYOrigin = (h - betty.getHeight()) * 0.5f;
mHorizontalBound = ((w / mMetersToPixelsX) * 0.5f);
mVerticalBound = ((h / mMetersToPixelsY) * 0.5f);
}
}
The image is going out side of the screen..But it should not go like this... 图像从屏幕的一侧移出。.但是它不应像这样...
You need to check all four sides of your canvas. 您需要检查画布的所有四个侧面。
You can try this: 您可以尝试以下方法:
int boundRight = canvas.getClipBounds().right;
int boundLeft = canvas.getClipBounds().left;
int boundBottom = canvas.getClipBounds().bottom;
int boundTop= canvas.getClipBounds().top;
if ( mPosX > boundRight ) {
mPosX = boundRight;
} else if ( mPosX < boundLeft ) {
mPosX = boundLeft;
}
if ( mPosY > boundBottom ) {
mPosY = boundBottom
} else if ( mPosY < boundTop ) {
mPosY = boundTop;
}
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