我在使用GitHub上的库时遇到了问题。
图书馆导致圆形图像。圆角部分效果很好,但图像大小调整并不像其他部分那样大。它在图像与图像之间有所不同,我想让这项工作将任何图像的大小调整为我在Android上的View的大小。例如,如果我用android:layout_width="100dp"
调用它,我希望将图像重新调整大小。
非常感谢你的时间。
这是图书馆:
package com.roundimage.support;
import android.annotation.SuppressLint;
import android.content.Context;
import android.content.Intent;
import android.graphics.Bitmap;
import android.graphics.BitmapShader;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.Shader;
import android.graphics.drawable.BitmapDrawable;
import android.provider.MediaStore;
import android.util.AttributeSet;
import android.widget.ImageView;
public class CircularImageView extends ImageView {
private int borderWidth = 3;
private int viewWidth;
private int viewHeight;
private Bitmap image;
private Paint paint;
private Paint paintBorder;
private BitmapShader shader;
public CircularImageView(Context context) {
super(context);
setup();
}
public CircularImageView(Context context, AttributeSet attrs) {
super(context, attrs);
setup();
}
public CircularImageView(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
setup();
}
private void setup()
{
// init paint
paint = new Paint();
paint.setAntiAlias(true);
paintBorder = new Paint();
setBorderColor(Color.WHITE);
paintBorder.setAntiAlias(true);
}
public void setBorderWidth(int borderWidth)
{
this.borderWidth = borderWidth;
this.invalidate();
}
public void setBorderColor(int borderColor)
{
if(paintBorder != null)
paintBorder.setColor(borderColor);
this.invalidate();
}
private void loadBitmap()
{
BitmapDrawable bitmapDrawable = (BitmapDrawable) this.getDrawable();
if(bitmapDrawable != null)
image = bitmapDrawable.getBitmap();
}
@SuppressLint("DrawAllocation")
@Override
public void onDraw(Canvas canvas)
{
//load the bitmap
loadBitmap();
// init shader
if(image !=null)
{
shader = new BitmapShader(Bitmap.createScaledBitmap(image, canvas.getWidth(), canvas.getHeight(), false), Shader.TileMode.CLAMP, Shader.TileMode.CLAMP);
paint.setShader(shader);
int circleCenter = viewWidth / 2;
// circleCenter is the x or y of the view's center
// radius is the radius in pixels of the cirle to be drawn
// paint contains the shader that will texture the shape
canvas.drawCircle(circleCenter + borderWidth, circleCenter + borderWidth, circleCenter + borderWidth, paintBorder);
canvas.drawCircle(circleCenter + borderWidth, circleCenter + borderWidth, circleCenter, paint);
}
}
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec)
{
int width = measureWidth(widthMeasureSpec);
int height = measureHeight(heightMeasureSpec, widthMeasureSpec);
viewWidth = width - (borderWidth *2);
viewHeight = height - (borderWidth*2);
setMeasuredDimension(width, height);
}
private int measureWidth(int measureSpec)
{
int result = 0;
int specMode = MeasureSpec.getMode(measureSpec);
int specSize = MeasureSpec.getSize(measureSpec);
if (specMode == MeasureSpec.EXACTLY) {
// We were told how big to be
result = specSize;
} else {
// Measure the text
result = viewWidth;
}
return result;
}
private int measureHeight(int measureSpecHeight, int measureSpecWidth) {
int result = 0;
int specMode = MeasureSpec.getMode(measureSpecHeight);
int specSize = MeasureSpec.getSize(measureSpecHeight);
if (specMode == MeasureSpec.EXACTLY) {
// We were told how big to be
result = specSize;
} else {
// Measure the text (beware: ascent is a negative number)
result = viewHeight;
}
return result;
}
}
这就是我在XML上的称呼方式:
<com.roundimage.support.CircularImageView
android:id="@+id/item_pic"
android:layout_width="70dp"
android:layout_height="70dp"
android:src="@drawable/example_id" />
这是如何保持的:
图像的确如此:
对于不同尺寸的不同图像,对于分辨率不同的不同设备,图像以不同的方式显示..
答案 0 :(得分:0)
尝试在xml中使用scaleType作为fitXY
android:ScaleType =“fitXY”
或以编程方式
imageview.setScaleType(ScaleType.FITXY)
如果不起作用,请尝试其他比例尺。
编辑:请参阅此帖here。
答案 1 :(得分:0)
好吧,你的代码应该运行良好,但它将图像放在图像视图中而不调整大小以适应查看器,因为你有这些结果。
尝试在布局中添加:
android:scaleType="fitCenter"
本教程中的阅读模式:http://www.peachpit.com/articles/article.aspx?p=1846580&seqNum=2
答案 2 :(得分:0)
@youssefhassan链接正确指出:
您必须将图像位图的大小调整为所需的大小:
` private void loadBitmap() { BitmapDrawable bitmapDrawable =(BitmapDrawable)this.getDrawable();
if(bitmapDrawable != null) {
int size = getPixelsFromDp(70);
Bitmap imageRealSize = bitmapDrawable.getBitmap();
image = Bitmap.createScaledBitmap(imageRealSize, size, size, true);
}
}
` 其中&#39; getPixelsFromDp&#39;是一个函数来获取你在xml上添加的dp(以像素为单位)(你可以找到加载页面来实现它)