Java 试图修复我的代码，但我一直失败：(

我有一个代码，它使用一个

列表视图将图像变成一个圆圈。但是如图中所示，当它到达照片的末尾时，它就消失了（最后几个像素是在不应该出现的情况下进行的）

我不希望照片占据整个页面，只希望照片的大小。以下是代码和XML：

流项目xml:

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="wrap_content" >

</RelativeLayout>

<ListView xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/main_list"
    android:layout_width="wrap_content"
    android:layout_height="match_parent"
    android:divider="@null"
    android:dividerHeight="0px"
    android:drawSelectorOnTop="true"
    tools:context=".StreamActivity" />

public class StreamActivity extends Activity {
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_stream);

        StreamAdapter adapter = new StreamAdapter(this);
        ((ListView) findViewById(R.id.main_list)).setAdapter(adapter);

        adapter.add(new StreamItem(this, R.drawable.testimage1, null, null));
        adapter.add(new StreamItem(this, R.drawable.testimage1, null, null));
        adapter.add(new StreamItem(this, R.drawable.testimage1, null, null));
        adapter.add(new StreamItem(this, R.drawable.testimage1, null, null));

    }

    class StreamItem {
        final Bitmap mBitmap;


        StreamItem(Context c, int resid, String line1, String line2) {
            mBitmap = BitmapFactory.decodeResource(c.getResources(), resid);

        }
    }

    class StreamDrawable extends Drawable {
        private static final boolean USE_VIGNETTE = true;

        private final float mCornerRadius;
        private final RectF mRect = new RectF();
        private final BitmapShader mBitmapShader;
        private final Paint mPaint;
        private final int mMargin;

        StreamDrawable(Bitmap bitmap, float cornerRadius, int margin) {
            mCornerRadius = cornerRadius;

            mBitmapShader = new BitmapShader(bitmap,
                    Shader.TileMode.CLAMP, Shader.TileMode.CLAMP);

            mPaint = new Paint();
            mPaint.setAntiAlias(true);
            mPaint.setShader(mBitmapShader);

            mMargin = margin;
        }

        @Override
        protected void onBoundsChange(Rect bounds) {
            super.onBoundsChange(bounds);
            mRect.set(mMargin, mMargin, bounds.width() - mMargin, bounds.height() - mMargin);

            if (USE_VIGNETTE) {
                RadialGradient vignette = new RadialGradient(
                        mRect.centerX(), mRect.centerY() * 1.0f / 0.7f, mRect.centerX() * 1.3f,
                        new int[] { 0, 0, 0x7f000000 }, new float[] { 0.0f, 0.7f, 1.0f },
                        Shader.TileMode.CLAMP);

                Matrix oval = new Matrix();
                oval.setScale(1.0f, 0.7f);
                vignette.setLocalMatrix(oval);

                mPaint.setShader(
                        new ComposeShader(mBitmapShader, vignette, PorterDuff.Mode.SRC_OVER));
            }
        }

        @Override
        public void draw(Canvas canvas) {
            canvas.drawRoundRect(mRect, mCornerRadius, mCornerRadius, mPaint);
        }

        @Override
        public int getOpacity() {
            return PixelFormat.TRANSLUCENT;
        }

        @Override
        public void setAlpha(int alpha) {
            mPaint.setAlpha(alpha);
        }

        @Override
        public void setColorFilter(ColorFilter cf) {
            mPaint.setColorFilter(cf);
        }       
    }


    class StreamAdapter extends ArrayAdapter<StreamItem> {
        private static final int CORNER_RADIUS =100; // dips
        private static final int MARGIN = 1; // dips

        private final int mCornerRadius;
        private final int mMargin;
        private final LayoutInflater mInflater;

        public StreamAdapter(Context context) {
            super(context, 0);

            final float density = context.getResources().getDisplayMetrics().density;
            mCornerRadius = (int) (CORNER_RADIUS * density + 0.5f);
            mMargin = (int) (MARGIN * density + 0.5f);

            mInflater = LayoutInflater.from(getContext());
        }

        @Override
        public View getView(int position, View convertView, ViewGroup parent) {
            ViewGroup view = null;

            if (convertView == null) {
                view = (ViewGroup) mInflater.inflate(R.layout.stream_item, parent, false);
            } else {
                view = (ViewGroup) convertView;
            }

            StreamItem item = getItem(position);

            StreamDrawable d = new StreamDrawable(item.mBitmap, mCornerRadius, mMargin);
            view.setBackgroundDrawable(d);

            int w = item.mBitmap.getWidth();
            int h = item.mBitmap.getHeight();

            float ratio = w / (float) h;

            LayoutParams lp = view.getLayoutParams();
            lp.width = getContext().getResources().getDisplayMetrics().widthPixels;
            lp.height = (int) (lp.width / ratio);

            return view;
        }
    }
}



活动流xml:

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="wrap_content" >

</RelativeLayout>

<ListView xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/main_list"
    android:layout_width="wrap_content"
    android:layout_height="match_parent"
    android:divider="@null"
    android:dividerHeight="0px"
    android:drawSelectorOnTop="true"
    tools:context=".StreamActivity" />

public class StreamActivity extends Activity {
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_stream);

        StreamAdapter adapter = new StreamAdapter(this);
        ((ListView) findViewById(R.id.main_list)).setAdapter(adapter);

        adapter.add(new StreamItem(this, R.drawable.testimage1, null, null));
        adapter.add(new StreamItem(this, R.drawable.testimage1, null, null));
        adapter.add(new StreamItem(this, R.drawable.testimage1, null, null));
        adapter.add(new StreamItem(this, R.drawable.testimage1, null, null));

    }

    class StreamItem {
        final Bitmap mBitmap;


        StreamItem(Context c, int resid, String line1, String line2) {
            mBitmap = BitmapFactory.decodeResource(c.getResources(), resid);

        }
    }

    class StreamDrawable extends Drawable {
        private static final boolean USE_VIGNETTE = true;

        private final float mCornerRadius;
        private final RectF mRect = new RectF();
        private final BitmapShader mBitmapShader;
        private final Paint mPaint;
        private final int mMargin;

        StreamDrawable(Bitmap bitmap, float cornerRadius, int margin) {
            mCornerRadius = cornerRadius;

            mBitmapShader = new BitmapShader(bitmap,
                    Shader.TileMode.CLAMP, Shader.TileMode.CLAMP);

            mPaint = new Paint();
            mPaint.setAntiAlias(true);
            mPaint.setShader(mBitmapShader);

            mMargin = margin;
        }

        @Override
        protected void onBoundsChange(Rect bounds) {
            super.onBoundsChange(bounds);
            mRect.set(mMargin, mMargin, bounds.width() - mMargin, bounds.height() - mMargin);

            if (USE_VIGNETTE) {
                RadialGradient vignette = new RadialGradient(
                        mRect.centerX(), mRect.centerY() * 1.0f / 0.7f, mRect.centerX() * 1.3f,
                        new int[] { 0, 0, 0x7f000000 }, new float[] { 0.0f, 0.7f, 1.0f },
                        Shader.TileMode.CLAMP);

                Matrix oval = new Matrix();
                oval.setScale(1.0f, 0.7f);
                vignette.setLocalMatrix(oval);

                mPaint.setShader(
                        new ComposeShader(mBitmapShader, vignette, PorterDuff.Mode.SRC_OVER));
            }
        }

        @Override
        public void draw(Canvas canvas) {
            canvas.drawRoundRect(mRect, mCornerRadius, mCornerRadius, mPaint);
        }

        @Override
        public int getOpacity() {
            return PixelFormat.TRANSLUCENT;
        }

        @Override
        public void setAlpha(int alpha) {
            mPaint.setAlpha(alpha);
        }

        @Override
        public void setColorFilter(ColorFilter cf) {
            mPaint.setColorFilter(cf);
        }       
    }


    class StreamAdapter extends ArrayAdapter<StreamItem> {
        private static final int CORNER_RADIUS =100; // dips
        private static final int MARGIN = 1; // dips

        private final int mCornerRadius;
        private final int mMargin;
        private final LayoutInflater mInflater;

        public StreamAdapter(Context context) {
            super(context, 0);

            final float density = context.getResources().getDisplayMetrics().density;
            mCornerRadius = (int) (CORNER_RADIUS * density + 0.5f);
            mMargin = (int) (MARGIN * density + 0.5f);

            mInflater = LayoutInflater.from(getContext());
        }

        @Override
        public View getView(int position, View convertView, ViewGroup parent) {
            ViewGroup view = null;

            if (convertView == null) {
                view = (ViewGroup) mInflater.inflate(R.layout.stream_item, parent, false);
            } else {
                view = (ViewGroup) convertView;
            }

            StreamItem item = getItem(position);

            StreamDrawable d = new StreamDrawable(item.mBitmap, mCornerRadius, mMargin);
            view.setBackgroundDrawable(d);

            int w = item.mBitmap.getWidth();
            int h = item.mBitmap.getHeight();

            float ratio = w / (float) h;

            LayoutParams lp = view.getLayoutParams();
            lp.width = getContext().getResources().getDisplayMetrics().widthPixels;
            lp.height = (int) (lp.width / ratio);

            return view;
        }
    }
}



主代码：

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="wrap_content" >

</RelativeLayout>

<ListView xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/main_list"
    android:layout_width="wrap_content"
    android:layout_height="match_parent"
    android:divider="@null"
    android:dividerHeight="0px"
    android:drawSelectorOnTop="true"
    tools:context=".StreamActivity" />

public class StreamActivity extends Activity {
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_stream);

        StreamAdapter adapter = new StreamAdapter(this);
        ((ListView) findViewById(R.id.main_list)).setAdapter(adapter);

        adapter.add(new StreamItem(this, R.drawable.testimage1, null, null));
        adapter.add(new StreamItem(this, R.drawable.testimage1, null, null));
        adapter.add(new StreamItem(this, R.drawable.testimage1, null, null));
        adapter.add(new StreamItem(this, R.drawable.testimage1, null, null));

    }

    class StreamItem {
        final Bitmap mBitmap;


        StreamItem(Context c, int resid, String line1, String line2) {
            mBitmap = BitmapFactory.decodeResource(c.getResources(), resid);

        }
    }

    class StreamDrawable extends Drawable {
        private static final boolean USE_VIGNETTE = true;

        private final float mCornerRadius;
        private final RectF mRect = new RectF();
        private final BitmapShader mBitmapShader;
        private final Paint mPaint;
        private final int mMargin;

        StreamDrawable(Bitmap bitmap, float cornerRadius, int margin) {
            mCornerRadius = cornerRadius;

            mBitmapShader = new BitmapShader(bitmap,
                    Shader.TileMode.CLAMP, Shader.TileMode.CLAMP);

            mPaint = new Paint();
            mPaint.setAntiAlias(true);
            mPaint.setShader(mBitmapShader);

            mMargin = margin;
        }

        @Override
        protected void onBoundsChange(Rect bounds) {
            super.onBoundsChange(bounds);
            mRect.set(mMargin, mMargin, bounds.width() - mMargin, bounds.height() - mMargin);

            if (USE_VIGNETTE) {
                RadialGradient vignette = new RadialGradient(
                        mRect.centerX(), mRect.centerY() * 1.0f / 0.7f, mRect.centerX() * 1.3f,
                        new int[] { 0, 0, 0x7f000000 }, new float[] { 0.0f, 0.7f, 1.0f },
                        Shader.TileMode.CLAMP);

                Matrix oval = new Matrix();
                oval.setScale(1.0f, 0.7f);
                vignette.setLocalMatrix(oval);

                mPaint.setShader(
                        new ComposeShader(mBitmapShader, vignette, PorterDuff.Mode.SRC_OVER));
            }
        }

        @Override
        public void draw(Canvas canvas) {
            canvas.drawRoundRect(mRect, mCornerRadius, mCornerRadius, mPaint);
        }

        @Override
        public int getOpacity() {
            return PixelFormat.TRANSLUCENT;
        }

        @Override
        public void setAlpha(int alpha) {
            mPaint.setAlpha(alpha);
        }

        @Override
        public void setColorFilter(ColorFilter cf) {
            mPaint.setColorFilter(cf);
        }       
    }


    class StreamAdapter extends ArrayAdapter<StreamItem> {
        private static final int CORNER_RADIUS =100; // dips
        private static final int MARGIN = 1; // dips

        private final int mCornerRadius;
        private final int mMargin;
        private final LayoutInflater mInflater;

        public StreamAdapter(Context context) {
            super(context, 0);

            final float density = context.getResources().getDisplayMetrics().density;
            mCornerRadius = (int) (CORNER_RADIUS * density + 0.5f);
            mMargin = (int) (MARGIN * density + 0.5f);

            mInflater = LayoutInflater.from(getContext());
        }

        @Override
        public View getView(int position, View convertView, ViewGroup parent) {
            ViewGroup view = null;

            if (convertView == null) {
                view = (ViewGroup) mInflater.inflate(R.layout.stream_item, parent, false);
            } else {
                view = (ViewGroup) convertView;
            }

            StreamItem item = getItem(position);

            StreamDrawable d = new StreamDrawable(item.mBitmap, mCornerRadius, mMargin);
            view.setBackgroundDrawable(d);

            int w = item.mBitmap.getWidth();
            int h = item.mBitmap.getHeight();

            float ratio = w / (float) h;

            LayoutParams lp = view.getLayoutParams();
            lp.width = getContext().getResources().getDisplayMetrics().widthPixels;
            lp.height = (int) (lp.width / ratio);

            return view;
        }
    }
}

公共类StreamActivity扩展活动{
@凌驾
创建时受保护的void（Bundle savedInstanceState）{
super.onCreate（savedInstanceState）；
setContentView（R.layout.activity_流）；
StreamAdapter=新的StreamAdapter（此）；
（（ListView）findViewById（R.id.main_list））.setAdapter（adapter）；
add（新的StreamItem（this，R.drawable.testimage1，null，null））；
add（新的StreamItem（this，R.drawable.testimage1，null，null））；
add（新的StreamItem（this，R.drawable.testimage1，null，null））；
add（新的StreamItem（this，R.drawable.testimage1，null，null））；
}
类流项目{
最终位图mBitmap；
StreamItem（上下文c、整数剩余、字符串行1、字符串行2）{
mBitmap=BitmapFactory.decodeResource（c.getResources（），resid）；
}
}
类StreamDrawable扩展了Drawable{
私有静态最终布尔用法\u VIGNETTE=true；
私人最终浮动mCornerRadius；
private final RectF mRect=new RectF（）；
专用最终位图着色器mBitmapShader；
私人最终油漆；
私人终审法院；
StreamDrawable（位图、浮点角半径、整型边距）{
mCornerRadius=转弯半径；
mBitmapShader=新的位图着色器（位图，
Shader.TileMode.CLAMP，Shader.TileMode.CLAMP）；
mPaint=新油漆（）；
mPaint.setAntiAlias（true）；
mPaint.setShader（mBitmapShader）；
M边缘=边缘；
}
@凌驾
受保护的void onBoundsChange（矩形边界）{
super.onBoundsChange（边界）；
mRect.set（mMargin，mMargin，bounds.width（）-mMargin，bounds.height（）-mMargin）；
如果（使用_渐晕图）{
RadialGradient渐晕=新的RadialGradient(
mRect.centerX（），mRect.centerY（）*1.0f/0.7f，mRect.centerX（）*1.3f，
新的int[]{0,0,0x7f000000}，新的float[]{0.0f,0.7f,1.0f}，
Shader.TileMode.CLAMP）；
矩阵椭圆=新矩阵（）；
椭圆形刻度盘（1.0f，0.7f）；
vignette.setLocalMatrix（椭圆形）；
mPaint.setShader(
新的复合阴影器（mBitmapShader、vignette、PorterDuff.Mode.SRC_OVER））；
}
}
@凌驾
公共空白绘制（画布）{
canvas.drawRoundRect（mRect、mCornerRadius、mCornerRadius、mPaint）；
}
@凌驾
公共int getOpacity（）{
返回像素格式。半透明；
}
@凌驾
公共void setAlpha（int-alpha）{
mPaint.setAlpha（alpha）；
}
@凌驾
公共无效设置ColorFilter（ColorFilter cf）{
mPaint.setColorFilter（cf）；
}       
}
类StreamAdapter扩展了ArrayAdapter{
私有静态最终int角半径=100；//倾角
专用静态最终整型余量=1；//下陷
私人最终int mCornerRadius；
私人终审法院；
私人最终布局平面图；
公共流适配器（上下文）{
超级（上下文，0）；
最终浮点密度=context.getResources（）.getDisplayMetrics（）.density；
mCornerRadius=（int）（角半径*密度+0.5f）；
M边缘=（内部）（边缘*密度+0.5f）；
mInflater=LayoutInflater.from（getContext（））；
}
@凌驾
公共视图getView（int位置、视图转换视图、视图组父视图）{
ViewGroup view=null；
if（convertView==null）{
视图=（视图组）最小平面。充气（R.layout.stream\u项，父项，false）；
}否则{
视图=（视图组）转换视图；
}
StreamItem item=getItem（位置）；
可提取流量d=新的可提取流量（item.mBitmap，mCornerRadius，mMargin）；
视图。可缩进地面绘制（d）；
int w=item.mBitmap.getWidth（）；
inth=item.mBitmap.getHeight（）；
浮动比率=w/（浮动）h；
LayoutParams lp=view.getLayoutParams（）；
lp.width=getContext（）.getResources（）.getDisplayMetrics（）.widthPixels；
lp.高度=（int）（lp.宽度/比率）；
返回视图；
}
}
}