我的要求是，
- 为可绘制文件夹加载图像，然后在图像周围添加圆角。
- 在图像周围填充白色/绿色描边。
在这里我完成了它们，这里我的问题是，当我存储显示在图像视图中的图像时，它没有存储。
对于圆角，我使用了以下代码。
private BitmapDrawable roundCornered(BitmapDrawable scaledBitmap, int i) {
Bitmap bitmap = scaledBitmap.getBitmap();
result = Bitmap.createBitmap(bitmap.getWidth(), bitmap.getHeight(),
Bitmap.Config.ARGB_8888);
canvas = new Canvas(result);
color = 0xff424242;
paint = new Paint();
rect = new Rect(0, 0, bitmap.getWidth(), bitmap.getHeight());
rectF = new RectF(rect);
roundPx = i;
paint.setAntiAlias(true);
canvas.drawARGB(0, 0, 0, 0);
//Add Stroke code Snippet here
canvas.drawRoundRect(rectF, roundPx, roundPx, paint);
paint.setXfermode(new PorterDuffXfermode(Mode.SRC_IN));
canvas.drawBitmap(bitmap, rect, rect, paint);
BitmapDrawable finalresult = new BitmapDrawable(result);
saveImage_Rotate_white(finalresult.getBitmap());
return finalresult;
}
在我的main.xml中：
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/finalLayout"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:background="@android:color/black"
android:orientation="vertical" >
<ImageView
android:id="@+id/imageView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:layout_centerVertical="true"
android:background="@drawable/roundcorner"
android:src="@drawable/test" />
<Button
android:id="@+id/button1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_centerVertical="true"
android:layout_marginLeft="20dp"
android:text="Click here to Rotate" />
</RelativeLayout>
要将 ImageView 设为圆角边缘，
<shape xmlns:android="http://schemas.android.com/apk/res/android" >
<stroke
android:width="6dp"
android:color="#FFFFFF" />
<padding
android:bottom="3dp"
android:left="3dp"
android:right="3dp"
android:top="3dp" />
<corners android:radius="12dp" />
</shape>
代码的最终结果如下所示
在这里，我必须将此图像保存在我的 SdCard 中。我怎样才能做到这一点。roundCornered()我尝试在方法中使用下面的代码片段而不是 xml 。这也行不通。
// for stroke
final Rect rect1 = new Rect((rect.left - 10), (rect.top - 10),
(rect.right + 10), (rect.bottom + 10));
final RectF rectF1 = new RectF(rect1);
Paint p = new Paint();
p.setStrokeWidth(1.0f);
p.setColor(Color.GREEN);
p.setStyle(Style.STROKE);
paint.setXfermode(new PorterDuffXfermode(Mode.SRC_OUT));
canvas.drawRoundRect(rectF1, 12, 12, p);
我的整个活动是，
public class BorderDraw extends Activity {
ImageView rec_image;
String rec_path;
RelativeLayout mLayout;
private Bitmap result;
private int color;
private Paint paint;
private Rect rect;
private RectF rectF;
private Canvas canvas;
private float roundPx;
RelativeLayout innerLayout;
static File rotated_File, bordered_file;
Button b1;
@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
b1 = (Button) findViewById(R.id.button1);
b1.setVisibility(View.GONE);
mLayout = (RelativeLayout) findViewById(R.id.finalLayout);
rec_image = (ImageView) findViewById(R.id.imageView1);
rec_path = getIntent().getExtras().getString("image_file");
Log.v("Image Path", rec_path);
// rec_image.setDrawingCacheEnabled(true);
String fname = "RoundCorner.jpg";
rotated_File = new File("/sdcard/" + fname);
bordered_file = new File("/sdcard/cornered_image.png");
BitmapDrawable scaledBitmap = resizeBitmap(rec_path, 200, 200,
rec_image);
BitmapDrawable cornered_bitmap = roundCornered(scaledBitmap, 12);
// saveImage_Rotate_white(cornered_bitmap.getBitmap());
rec_image.setImageDrawable(cornered_bitmap);
System.out.println("ImageView Height" + rec_image.getHeight());
System.out.println("ImageView Width" + rec_image.getWidth());
}
private BitmapDrawable roundCornered(BitmapDrawable scaledBitmap, int i) {
Bitmap bitmap = scaledBitmap.getBitmap();
result = Bitmap.createBitmap(bitmap.getWidth(), bitmap.getHeight(),
Bitmap.Config.ARGB_8888);
canvas = new Canvas(result);
color = 0xff424242;
paint = new Paint();
rect = new Rect(0, 0, bitmap.getWidth(), bitmap.getHeight());
rectF = new RectF(rect);
roundPx = i;
paint.setAntiAlias(true);
canvas.drawARGB(0, 0, 0, 0);
canvas.drawRoundRect(rectF, roundPx, roundPx, paint);
paint.setXfermode(new PorterDuffXfermode(Mode.SRC_IN));
canvas.drawBitmap(bitmap, rect, rect, paint);
BitmapDrawable finalresult = new BitmapDrawable(result);
saveImage_Rotate_white(finalresult.getBitmap());
return finalresult;
}
private void saveImage_Rotate_white(Bitmap bitmap) {
rec_image.setImageBitmap(bitmap);
final Bitmap myRoundedImage = rec_image.getDrawingCache();
if (bordered_file.exists())
bordered_file.delete();
try {
FileOutputStream out = new FileOutputStream(bordered_file);
myRoundedImage.compress(Bitmap.CompressFormat.PNG, 90, out);
out.flush();
out.close();
} catch (Exception e) {
e.printStackTrace();
}
}
private BitmapDrawable resizeBitmap(String rec_path2, int wantedWidth,
int wantedHeight, ImageView view) {
// TODO Auto-generated method stub
BitmapFactory.Options options = new BitmapFactory.Options();
options.inTempStorage = new byte[16 * 1024];
Bitmap rec_bitmap = BitmapFactory.decodeFile(rec_path2, options);
int width = rec_bitmap.getWidth();
int height = rec_bitmap.getHeight();
float xScale = ((float) wantedWidth) / width;
float yScale = ((float) wantedHeight) / height;
float scale = (xScale <= yScale) ? xScale : yScale;
Matrix matrix = new Matrix();
matrix.postScale(scale, scale);
Bitmap scaledBitmap = Bitmap.createBitmap(rec_bitmap, 0, 0, width,
height, matrix, true);
BitmapDrawable finalImage = new BitmapDrawable(scaledBitmap);
width = scaledBitmap.getWidth();
height = scaledBitmap.getHeight();
return finalImage;
}
static void saveImage_Rotate(Bitmap dest2) {
if (rotated_File.exists())
rotated_File.delete();
try {
FileOutputStream out = new FileOutputStream(rotated_File);
dest2.compress(Bitmap.CompressFormat.PNG, 100, out);
out.flush();
out.close();
} catch (Exception e) {
e.printStackTrace();
}
}
}