如何保存android ImageView中显示的图像?
我的要求是,如何保存android ImageView中显示的图像?,android,Android,我的要求是, 加载可绘制文件夹的图像,然后在图像周围添加圆角 在图像周围填充白色/绿色笔划 这里我完成了这两个步骤,我的问题是,当我存储图像视图中显示的图像时,它没有存储 对于圆角,我使用了下面的代码 private BitmapDrawable roundCornered(BitmapDrawable scaledBitmap, int i) { Bitmap bitmap = scaledBitmap.getBitmap(); result = Bi
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mymain.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>
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();
}
}
}
public类BorderDraw扩展活动{
ImageView rec_图像;
字符串记录路径;
相对布局;
私有位图结果;
私人内特色;
私人油漆;
私人直肠;
私有RectF-RectF;
私人帆布;
私人浮动轮;
相对的内部布局;
静态文件旋转_文件,带边框_文件;
按钮b1;
@凌驾
创建时受保护的void(Bundle savedInstanceState){
//TODO自动生成的方法存根
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
b1=(按钮)findViewById(R.id.button1);
b1.设置可见性(视图已消失);
mLayout=(相对长度)findViewById(R.id.finalLayout);
rec_image=(ImageView)findViewById(R.id.imageView1);
rec_path=getIntent().getExtras().getString(“图像文件”);
Log.v(“图像路径”,rec_路径);
//rec_image.setDrawingCacheEnabled(真);
String fname=“RoundCorner.jpg”;
旋转的文件=新文件(“/sdcard/”+fname);
bordered_file=新文件(“/sdcard/corneed_image.png”);
BitmapDrawable scaledBitmap=resizeBitmap(记录路径,200200,
记录图像);
BitmapDrawable cornered_位图=圆角(缩放位图,12);
//saveImage_Rotate_white(转角_bitmap.getBitmap());
rec_image.setImageDrawable(角落位图);
System.out.println(“ImageView高度”+rec_image.getHeight());
System.out.println(“ImageView宽度”+rec_image.getWidth());
}
私有位图可绘制圆角(位图可绘制缩放位图,int i){
位图位图=缩放位图.getBitmap();
结果=Bitmap.createBitmap(Bitmap.getWidth()、Bitmap.getHeight(),
位图.Config.ARGB_8888);
画布=新画布(结果);
颜色=0xFF4242;
油漆=新油漆();
rect=newrect(0,0,bitmap.getWidth(),bitmap.getHeight());
rectF=新的rectF(rect);
roundPx=i;
paint.setAntiAlias(真);
drawARGB(0,0,0,0);
canvas.drawRoundRect(rectF、roundPx、roundPx、paint);
setXfermode(新的PorterDuffXfermode(Mode.SRC_IN));
绘制位图(位图、矩形、矩形、绘制);
BitmapDrawable finalresult=新的BitmapDrawable(结果);
saveImage_Rotate_white(finalresult.getBitmap());
返回最终结果;
}
私有void保存图像\旋转\白色(位图){
rec_image.setImageBitmap(位图);
最终位图myRoundedImage=rec_image.getDrawingCache();
if(带边框的_文件.exists())
带边框的_文件。删除();
试一试{
FileOutputStream out=新的FileOutputStream(带边框的_文件);
myRoundedImage.compress(Bitmap.CompressFormat.PNG,90,out);
out.flush();
out.close();
}捕获(例外e){
e、 printStackTrace();
}
}
私有位图可缩放位图(字符串rec_path2,int wantedWidth,
int wantedHeight,ImageView){
//TODO自动生成的方法存根
BitmapFactory.Options=new-BitmapFactory.Options();
options.inTempStorage=新字节[16*1024];
位图rec_Bitmap=BitmapFactory.decodeFile(rec_路径2,选项);
int width=rec_bitmap.getWidth();
int height=rec_bitmap.getHeight();
浮动xScale=((浮动)wantedWidth)/宽度;
浮动Y刻度=((浮动)所需高度)/高度;
float scale=(xScale您可以实现的一件事是:
在您的活动
、片段
,或在任何您正在膨胀XML的地方,为您的视图
启用缓存,如下所示:
ImageView myImageView= (ImageView)findViewById(R.id.imageView1);
myImageView.setDrawingCacheEnabled(true);
final Bitmap myRoundedImage = myImageView.getDrawingCache();
每当您想要检索位图时,只需调用get drawing缓存,如下所示:
ImageView myImageView= (ImageView)findViewById(R.id.imageView1);
myImageView.setDrawingCacheEnabled(true);
final Bitmap myRoundedImage = myImageView.getDrawingCache();
或者,您可以执行以下操作:
final Bitmap myRoundedImage = Bitmap.createBitmap(
myImageView.getWidth(), myImageView.getHeight(), Bitmap.Config.ARGB_8888 );
final Canvas canvas = new Canvas( myRoundedImage );
myImageView.draw( canvas );
一旦你有了位图,你所要做的就是将它保存到SD卡上,比如:
try {
FileOutputStream out = new FileOutputStream(filename);
myRoundedImage.compress(Bitmap.CompressFormat.PNG, 90, out);
} catch (Exception e) {
e.printStackTrace();
}
您可以实现的一件事是:
在您的活动
、片段
,或在任何您正在膨胀XML的地方,为您的视图
启用缓存,如下所示:
ImageView myImageView= (ImageView)findViewById(R.id.imageView1);
myImageView.setDrawingCacheEnabled(true);
final Bitmap myRoundedImage = myImageView.getDrawingCache();
每当您想要检索位图时,只需调用get drawing缓存,如下所示:
ImageView myImageView= (ImageView)findViewById(R.id.imageView1);
myImageView.setDrawingCacheEnabled(true);
final Bitmap myRoundedImage = myImageView.getDrawingCache();
或者,您可以执行以下操作:
final Bitmap myRoundedImage = Bitmap.createBitmap(
myImageView.getWidth(), myImageView.getHeight(), Bitmap.Config.ARGB_8888 );
final Canvas canvas = new Canvas( myRoundedImage );
myImageView.draw( canvas );
一旦你有了位图,你所要做的就是将它保存到SD卡上,比如:
try {
FileOutputStream out = new FileOutputStream(filename);
myRoundedImage.compress(Bitmap.CompressFormat.PNG, 90, out);
} catch (Exception e) {
e.printStackTrace();
}
所以你的问题是如何在SD卡中以圆形边界存储图像???永远不要直接访问SD卡。使用环境这里是一个例子:它已保存,但我无法查看图像,当我打开它时,它说,无法打开此图像。所以你的问题是如何在SD卡中以圆形边界存储图像???永远不要直接访问SD卡。使用Envir这里的onment是一个示例:它已保存但无法查看图像,当我打开它时,显示无法打开此图像。我使用了两种方法,但无法获得解决方案。当我使用此最终位图MyRoundeImage=myImageView.getDrawingCache()时,图像将无法创建。设备显示“无法加载此图像”以及当我使用最终位图MyRoundeImage=Bitmap.createBitmap(myImageView.getWidth(),myImageView.getHeight(),Bitmap.Config.ARGB_8888);最终画布=新画布(MyRoundeImage);myImageView.draw(画布);表示它在这一行上抛出错误。要编辑您的代码,我需要更多的代码。例如,您的活动或片段,或者无论您在何处声明I