1.从应用中获取图片
Bitmap bitmap = BitmapFactory.decodeResource(getResources(), imageId);
2.从本地缓存中获取图片
BitmapFactory.Options bmOptions = new BitmapFactory.Options();
Bitmap bitmap = BitmapFactory.decodeFile(imagePath, bmOptions);
3.将图片写入相册
/**
* 保存图片至相册
*/
public static void saveImageToGallery(Context context, Bitmap bmp) {
// 首先保存图片
File appDir = new File(Environment.getExternalStorageDirectory(), "云阅相册");
if (!appDir.exists()) {
appDir.mkdirs();
}
String fileName = System.currentTimeMillis() + ".jpg";
File file = new File(appDir, fileName);
try {
FileOutputStream fos = new FileOutputStream(file);
bmp.compress(Bitmap.CompressFormat.JPEG, 100, fos);
fos.flush();
fos.close();
} catch (IOException e) {
e.printStackTrace();
}
// 其次把文件插入到系统图库
try {
MediaStore.Images.Media.insertImage(context.getContentResolver(),
file.getAbsolutePath(), fileName, null);
} catch (FileNotFoundException e) {
e.printStackTrace();
}
// 最后通知图库更新
context.sendBroadcast(new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE, Uri.parse("file://" + file.getAbsoluteFile())));
}
