自定义圆图片（2）

来源：互联网发布：mac字体大小编辑：程序博客网时间：2024/05/18 16:38

第一步首先自定义一个类继承ImageView

import android.content.Context;import android.graphics.Bitmap;import android.graphics.Canvas;import android.graphics.Paint;import android.graphics.PorterDuff;import android.graphics.PorterDuffXfermode;import android.graphics.Xfermode;import android.graphics.drawable.Drawable;import android.util.AttributeSet;import android.widget.ImageView;public abstract class MaskedImage extends ImageView {     private static final Xfermode MASK_XFERMODE;          private Bitmap mask;          private Paint paint;          static {              PorterDuff.Mode localMode = PorterDuff.Mode.DST_IN;              MASK_XFERMODE = new PorterDuffXfermode(localMode);          }          public MaskedImage(Context paramContext) {              super(paramContext);          }        public MaskedImage(Context paramContext, AttributeSet paramAttributeSet) {              super(paramContext, paramAttributeSet);          }          public MaskedImage(Context paramContext, AttributeSet paramAttributeSet, int paramInt) {              super(paramContext, paramAttributeSet, paramInt);          }          public abstract Bitmap createMask();          protected void onDraw(Canvas paramCanvas) {            Drawable localDrawable = getDrawable();            if (localDrawable == null)                  return;              try {                  if (this.paint == null) {                     Paint localPaint1 = new Paint();                      this.paint = localPaint1;                      this.paint.setFilterBitmap(false);                    Paint localPaint2 = this.paint;                      Xfermode localXfermode1 = MASK_XFERMODE;                      @SuppressWarnings("unused")                      Xfermode localXfermode2 = localPaint2.setXfermode(localXfermode1);                  }                  float f1 = getWidth();                  float f2 = getHeight();                  int i = paramCanvas.saveLayer(0.0F, 0.0F, f1, f2, null, 31);                  int j = getWidth();                  int k = getHeight();                  localDrawable.setBounds(0, 0, j, k);                  localDrawable.draw(paramCanvas);                  if ((this.mask == null) || (this.mask.isRecycled())) {                      Bitmap localBitmap1 = createMask();                      this.mask = localBitmap1;                  }                  Bitmap localBitmap2 = this.mask;                  Paint localPaint3 = this.paint;                  paramCanvas.drawBitmap(localBitmap2, 0.0F, 0.0F, localPaint3);                  paramCanvas.restoreToCount(i);                  return;              } catch (Exception localException) {                  StringBuilder localStringBuilder = new StringBuilder()                          .append("Attempting to draw with recycled bitmap. View ID = ");                  System.out.println("localStringBuilder=="+localStringBuilder);              }          }  }

第二步再定义一个类继承上面的MaskedImage实现绘制自定义图片

import android.content.Context;import android.graphics.Bitmap;import android.graphics.Canvas;import android.graphics.Paint;import android.graphics.RectF;import android.util.AttributeSet;public class CircularImage extends MaskedImage {        public CircularImage(Context paramContext) {              super(paramContext);          }          public CircularImage(Context paramContext, AttributeSet paramAttributeSet) {              super(paramContext, paramAttributeSet);          }          public CircularImage(Context paramContext, AttributeSet paramAttributeSet, int paramInt) {              super(paramContext, paramAttributeSet, paramInt);          }          public Bitmap createMask() {              int i = getWidth();  //宽度            int j = getHeight();  //高度            //图片配合 Bitmap.Config.ARGB_8888这个是颜色设置a代表的是Alpha rgb是RED GREEN BLUE三原色            Bitmap.Config localConfig = Bitmap.Config.ARGB_8888;             Bitmap localBitmap = Bitmap.createBitmap(i, j, localConfig);              Canvas localCanvas = new Canvas(localBitmap);            Paint localPaint = new Paint(1);             localPaint.setColor(-16777216);            float f1 = getWidth();              float f2 = getHeight();              RectF localRectF = new RectF(0.0f, 0.0f, f1, f2);             localCanvas.drawOval(localRectF, localPaint);              return localBitmap;          }  }

第三步在布局中引入自定义的类

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools"    android:layout_width="match_parent"    android:layout_height="match_parent"    tools:context=".MainActivity" >    <ImageView          android:layout_width="82.0dip"          android:layout_height="82.0dip"          android:layout_centerInParent="true"          android:contentDescription="@null"         android:background="@drawable/me_head_bg"         />      <com.example.head.CircularImage          android:id="@+id/cover_user_photo"          android:layout_width="74.0dip"          android:layout_height="74.0dip"          android:layout_centerInParent="true" />  </RelativeLayout>

//在主类中为自定义图片赋值

import android.os.Bundle;import android.app.Activity;import android.view.Menu;public class MainActivity extends Activity {     @Override          protected void onCreate(Bundle savedInstanceState) {              super.onCreate(savedInstanceState);              setContentView(R.layout.activity_main);            //控件获得id             CircularImage cover_user_photo = (CircularImage) findViewById(R.id.cover_user_photo);             //为控件设置背景图片            cover_user_photo.setImageResource(R.drawable.face);          }  }

运行的效果图：
这里写图片描述

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