如何在android中从位图保存图像到外部存储器
我正在使用ACTION_IMAGE_CAPTURE使用相机拍摄图像。它工作正常,但问题是图像在单击后显示在imageview中,但无法保存在外部或内部存储器中。这是我在外部存储器中保存图像的代码如何在android中从位图保存图像到外部存储器,android,bitmap,storage,Android,Bitmap,Storage,我正在使用ACTION_IMAGE_CAPTURE使用相机拍摄图像。它工作正常,但问题是图像在单击后显示在imageview中,但无法保存在外部或内部存储器中。这是我在外部存储器中保存图像的代码 Bitmap bitmap = (Bitmap) data.getExtras().get("data"); File file = new File(Environment.getExternalStorageDirectory().getAbsoluteFile() + "/Dash
Bitmap bitmap = (Bitmap) data.getExtras().get("data");
File file = new File(Environment.getExternalStorageDirectory().getAbsoluteFile() + "/DashBoard/");
file.mkdirs();
ticket = Environment.getExternalStorageDirectory().getAbsolutePath() + "/DashBoard/Ticket.jpg";
file4 = new File(file, ticket);
try {
FileOutputStream out = new FileOutputStream(file4);
bitmap.compress(Bitmap.CompressFormat.JPEG , 90, out);
out.flush();
out.close();
} catch (Exception e) {
e.printStackTrace();
}
ivTicket.setImageBitmap(bitmap);
有什么解决方案吗?遵循它-
private void SaveImage(Bitmap finalBitmap) {
String root = Environment.getExternalStorageDirectory().toString();
File myDir = new File(root + "/saved_images");
myDir.mkdirs();
Random generator = new Random();
int n = 10000;
n = generator.nextInt(n);
String fname = "Image-"+ n +".jpg";
File file = new File (myDir, fname);
if (file.exists ())
file.delete ();
try {
FileOutputStream out = new FileOutputStream(file);
finalBitmap.compress(Bitmap.CompressFormat.JPEG, 90, out);
out.flush();
out.close();
} catch (Exception e) {
e.printStackTrace();
}
}
并将其添加到清单中
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
试试这个:
private void SaveImage(Bitmap finalBitmap) {
String root = Environment.getExternalStorageDirectory().toString();
File myDir = new File(root + "/saved_images");
myDir.mkdirs();
Random generator = new Random();
int n = 10000;
n = generator.nextInt(n);
String fname = "Image-"+ n +".jpg";
File file = new File (myDir, fname);
if (file.exists ()) file.delete ();
try {
FileOutputStream out = new FileOutputStream(file);
finalBitmap.compress(Bitmap.CompressFormat.JPEG, 90, out);
out.flush();
out.close();
} catch (Exception e) {
e.printStackTrace();
}
}
并将其添加到清单中
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
另一个示例是使用库轻松保存位图/绘图/base64
如何节约
ImageWorker.to(context).
directory("ImageWorker").
subDirectory("SubDirectory").
setFileName("Image").
withExtension(Extension.PNG).
save(sourceBitmap,85)
就这么简单。欢迎捐款 检查您是否具有menifist和runtime权限,以获得您的支持我通过删除getAbsolutePath()函数解决了问题。是的,我在回答环境中已经提到您。getExternalStorageDirectory().toString();谢谢:)
效果很好,
。如果原始图像只有缩略图,您满意吗?您有哪些问题?有错误或例外吗?张贴日志。查看file4.getAbsolutePath()
的值,并意识到您构建了一个不可能的路径。是的,我只得到缩略图。但没有得到应有的形象