[英]ClassNotFoundException for custom ImageView in Android app
I am getting following exception...我收到以下异常...
08-12 14:19:41.564: ERROR/AndroidRuntime(797): Caused by: java.lang.ClassNotFoundException: com.widgets.utils.CustomRoundedCornerImageView in loader dalvik.system.PathClassLoader[.]
I have created a custom ImageView ie com.widgets.utils.CustomRoundedCornerImageView and using it in a layout xml.我创建了一个自定义 ImageView 即com.widgets.utils.CustomRoundedCornerImageView并在布局 xml 中使用它。 The CustomRoundedCornerImageView.java is in class path with other classes. CustomRoundedCornerImageView.java 与其他类位于 class 路径中。
CustomRoundedCornerImageView.java CustomRoundedCornerImageView.java
package com.widgets.utils;
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.Bitmap.Config;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.graphics.PorterDuff.Mode;
import android.graphics.PorterDuffXfermode;
import android.graphics.Rect;
import android.graphics.RectF;
import android.graphics.drawable.BitmapDrawable;
import android.graphics.drawable.Drawable;
import android.util.AttributeSet;
import android.widget.ImageView;
public class CustomRoundedCornerImageView extends ImageView {
public CustomRoundedCornerImageView(Context context) {
super(context);
}
public CustomRoundedCornerImageView(Context context, AttributeSet attrs) {
super(context, attrs);
}
public CustomRoundedCornerImageView(Context context, AttributeSet attrs,
int defStyle) {
super(context, attrs, defStyle);
}
@Override
protected void onDraw(Canvas canvas) {
Drawable drawable = getDrawable();
Bitmap b = ((BitmapDrawable)drawable).getBitmap() ;
Bitmap bitmap = b.copy(Bitmap.Config.ARGB_8888, true);
Bitmap roundBitmap = getRoundedCornerBitmap(bitmap,30);
canvas.drawBitmap(roundBitmap, 0,0 , null);
}
public static Bitmap getRoundedCornerBitmap(Bitmap bitmap, int pixels) {
Bitmap roundedBitmap = Bitmap.createBitmap(bitmap.getWidth(), bitmap
.getHeight(), Config.ARGB_8888);
Canvas canvas = new Canvas(roundedBitmap);
final int color = 0xff424242;
final Paint paint = new Paint();
final Rect rect = new Rect(0, 0, bitmap.getWidth(), bitmap.getHeight());
final RectF rectF = new RectF(rect);
final float roundPx = pixels;
paint.setAntiAlias(true);
canvas.drawARGB(0, 0, 0, 0);
paint.setColor(color);
canvas.drawRoundRect(rectF, roundPx, roundPx, paint);
paint.setXfermode(new PorterDuffXfermode(Mode.SRC_IN));
canvas.drawBitmap(bitmap, rect, rect, paint);
return roundedBitmap;
}
}
layout.xml布局.xml
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/picture_frame"
android:layout_width="70px"
android:layout_height="70px"
android:gravity="center"
android:layout_marginTop="5px"
android:layout_marginLeft="40px"
android:focusable="false"
android:visibility="invisible"
android:background="@drawable/picture_frame">
<com.widgets.utils.CustomRoundedCornerImageView
android:id="@+id/picture"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:scaleType="centerCrop"
android:focusable="false" />
</LinearLayout>
Can you help me why I am getting ClassNotFoundException?你能帮我为什么我得到 ClassNotFoundException 吗?
<com.widgets.utils.CustomRoundedCornerImageView
android:id="@+id/picture"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:scaleType="centerCrop"
android:focusable="false" />
in this you have to change在这你必须改变
<ImageView class="com.widgets.utils.CustomRoundedCornerImageView"
android:id="@+id/picture"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:scaleType="centerCrop"
android:focusable="false" />
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