自定义圆形图片

//自定义ImageView

package com.zcp.map;

import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Path;
import android.graphics.RectF;
import android.util.AttributeSet;
import android.widget.ImageView;

public class ImgView extends ImageView {

public ImgView(Context context, AttributeSet attrs) {
super(context, attrs);

}
@Override
protected void onDraw(Canvas canvas) {
Path clipPath = new Path();
int w = this.getWidth();
int h = this.getHeight();
clipPath.addRoundRect(new RectF(0, 0, w, h), 200.0f, 200.0f,
Path.Direction.CW);
canvas.clipPath(clipPath);
super.onDraw(canvas);
}

}

//MainActivity

package com.zcp.map;

import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;

public class MainActivity extends Activity {

private ImgView img;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
img=(ImgView)findViewById(R.id.img);
img.setImageResource(R.drawable.x);
}

}

//xml

<com.zcp.map.ImgView
android:id="@+id/img"
android:layout_width="200dp"
android:layout_height="200dp"
android:layout_centerHorizontal="true"
android:layout_centerVertical="true"
android:scaleType="fitXY" />