保存成位图文件和其位图图像返回文件 [英] Save Bitmap into File and return File having bitmap image
本文介绍了保存成位图文件和其位图图像返回文件的处理方法,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
我有一个问题要保存成位图文件。 我的方法是这样的:
I have a problem to save Bitmaps into files. My method is like this:
private File savebitmap(Bitmap bmp) {
String extStorageDirectory = Environment.getExternalStorageDirectory()
.toString();
OutputStream outStream = null;
File file = new File(bmp + ".png");
if (file.exists()) {
file.delete();
file = new File(extStorageDirectory, bmp + ".png");
Log.e("file exist", "" + file + ",Bitmap= " + bmp);
}
try {
outStream = new FileOutputStream(file);
bmp.compress(Bitmap.CompressFormat.PNG, 100, outStream);
outStream.flush();
outStream.close();
} catch (Exception e) {
e.printStackTrace();
}
Log.e("file", "" + file);
return file;
}
它给了我file.I的错误正在调用该方法是这样的:
It gives me error of file.I am calling this method like this:
Drawable d = iv.getDrawable();
Bitmap bitmap = ((BitmapDrawable) d).getBitmap();
File file = savebitmap(bitmap);
请帮我...
推荐答案
我尝试修改一下你的code 我假设你想使用的文件名,而不是位图作为参数
I try to make some corrections on your code I assume that you want to use filename instead of bitmap as parameter
private File savebitmap(String filename) {
String extStorageDirectory = Environment.getExternalStorageDirectory().toString();
OutputStream outStream = null;
File file = new File(filename + ".png");
if (file.exists()) {
file.delete();
file = new File(extStorageDirectory, filename + ".png");
Log.e("file exist", "" + file + ",Bitmap= " + filename);
}
try {
// make a new bitmap from your file
Bitmap bitmap = BitmapFactory.decodeFile(file.getName());
outStream = new FileOutputStream(file);
bitmap.compress(Bitmap.CompressFormat.PNG, 100, outStream);
outStream.flush();
outStream.close();
} catch (Exception e) {
e.printStackTrace();
}
Log.e("file", "" + file);
return file;
}
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