現在我們在開發中,不難發現,那些四方四正的圖片漸漸的被圓形圓角所替代,那麼我們怎麼怎麼才能讓Android中的ImageView實現圓形與圓角的圖片呢?我們知道,Android自己的ImageView並不可以實現圓形圓角圖片的,那我們想要圓形與圓角的圖片該怎麼做呢???
這裏我所知道的有兩種辦法:
1、ImageLoader可以一行代碼實現Android圓形圓角圖片的;
2、如果不用第三方框架的話,那麼只能自定義控件了,這裏推薦一個自定義的控件,然後我們佈局中直接使用就可以實現圓形圖片了。
我還是直接上代碼吧:
package com.bawei.shop.view;
/**
* Created by ThinkPad on 2016/6/8.
* 自定義圖片的圓形
*/
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.Bitmap.Config;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.PorterDuff.Mode;
import android.graphics.PorterDuffXfermode;
import android.graphics.Rect;
import android.graphics.drawable.BitmapDrawable;
import android.graphics.drawable.Drawable;
import android.util.AttributeSet;
import android.widget.ImageView;
public class RoundImageView extends ImageView {
private Bitmap b;
public RoundImageView(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
// TODO Auto-generated constructor stub
}
public RoundImageView(Context context, AttributeSet attrs) {
super(context, attrs);
// TODO Auto-generated constructor stub
}
public RoundImageView(Context context) {
super(context);
// TODO Auto-generated constructor stub
}
@Override
protected void onDraw(Canvas canvas) {
Drawable drawable = getDrawable();
if (drawable == null) {
return;
}
if (getWidth() == 0 || getHeight() == 0) {
return;
}
if (drawable instanceof BitmapDrawable) {
b = ((BitmapDrawable) drawable).getBitmap();
}
// b = ((BitmapDrawable) drawable).getBitmap();
if (null == b) {
return;
}
Bitmap bitmap = b.copy(Bitmap.Config.ARGB_8888, true);
int w = getWidth(), h = getHeight();
Bitmap roundBitmap = getCroppedBitmap(bitmap, w);
canvas.drawBitmap(roundBitmap, 0, 0, null);
}
public static Bitmap getCroppedBitmap(Bitmap bmp, int radius) {
Bitmap sbmp;
if (bmp.getWidth() != radius || bmp.getHeight() != radius)
sbmp = Bitmap.createScaledBitmap(bmp, radius, radius, false);
else
sbmp = bmp;
Bitmap output = Bitmap.createBitmap(sbmp.getWidth(), sbmp.getHeight(),
Config.ARGB_8888);
Canvas canvas = new Canvas(output);
final int color = 0xffa19774;
final Paint paint = new Paint();
final Rect rect = new Rect(0, 0, sbmp.getWidth(), sbmp.getHeight());
paint.setAntiAlias(true);
paint.setFilterBitmap(true);
paint.setDither(true);
canvas.drawARGB(0, 0, 0, 0);
paint.setColor(Color.parseColor("#BAB399"));
canvas.drawCircle(sbmp.getWidth() / 2 + 0.7f,
sbmp.getHeight() / 2 + 0.7f, sbmp.getWidth() / 2 + 0.1f, paint);
paint.setXfermode(new PorterDuffXfermode(Mode.SRC_IN));
canvas.drawBitmap(sbmp, rect, rect, paint);
return output;
}
}
那麼我們現在有了這個RoudImageView,我們該怎麼用呢?很簡單,佈局中直接用就是!
希望對大家有所幫助哦