本文介绍了阅读从外部存储Android的图像/文件的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我试图加载从外部存储的图像。我设置的权限,我尝试不同的方法,但他们没有工作。
BitmapFactory.Options选项=新BitmapFactory.Options();
options.in preferredConfig = Bitmap.Config.ARGB_8888;
点阵位图= BitmapFactory.de codeFILE(file.toString());
tv.setImageBitmap(位);
而这其中,
的FileInputStream streamIn =新的FileInputStream(文件);
点阵位图= BitmapFactory.de codeStream(streamIn);
tv.setImageBitmap(位);
streamIn.close();
解决方案
如果我在文件
然后 abc.jpg
SD卡
字符串photoPath = Environment.getExternalStorageDirectory()+/ abc.jpg;
和取得位图
。
BitmapFactory.Options选项=新BitmapFactory.Options();
options.in preferredConfig = Bitmap.Config.ARGB_8888;
点阵位图= BitmapFactory.de codeFILE(photoPath,期权);
或
位图bitmap1 = BitmapFactory.de codeFILE(photoPath);
以avoide内存不足的错误我会saggest你做下面code ...
BitmapFactory.Options选项=新BitmapFactory.Options();
options.inSampleSize = 8;
最后的位图B = BitmapFactory.de codeFILE(photoPath,期权);
I'm trying to load an image from external storage. I set the permissions, I tried different ways, but none of them works.
BitmapFactory.Options options = new BitmapFactory.Options();
options.inPreferredConfig = Bitmap.Config.ARGB_8888;
Bitmap bitmap = BitmapFactory.decodeFile(file.toString());
tv.setImageBitmap(bitmap);
and this one,
FileInputStream streamIn = new FileInputStream(file);
Bitmap bitmap = BitmapFactory.decodeStream(streamIn);
tv.setImageBitmap(bitmap);
streamIn.close();
解决方案
if i have file abc.jpg
in sdcard
then
String photoPath = Environment.getExternalStorageDirectory()+"/abc.jpg";
and get bitmap
.
BitmapFactory.Options options = new BitmapFactory.Options();
options.inPreferredConfig = Bitmap.Config.ARGB_8888;
Bitmap bitmap = BitmapFactory.decodeFile(photoPath, options);
or
Bitmap bitmap1 = BitmapFactory.decodeFile(photoPath);
to avoide out of memory error i 'll saggest you do below code...
BitmapFactory.Options options = new BitmapFactory.Options();
options.inSampleSize = 8;
final Bitmap b = BitmapFactory.decodeFile(photoPath, options);
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