第一步：获取存储的路径 我们用/sdcard/Android/data/包名/的路径 方便我们测试查看
String path=MyApplication.getContextObject().getExternalFilesDir("").toString();
File file=new File(path);
第二步：根据该文件中存储的路径信息在文件系统上创建一个新的空文件
File finalImageFile = new File(file, System.currentTimeMillis() + ".jpg");
try {
finalImageFile.createNewFile();
} catch (IOException e) {
e.printStackTrace();
}
第三步：将字节放入文件输出流
FileOutputStream fos = null;
try {
fos = new FileOutputStream(finalImageFile);
} catch (FileNotFoundException e) {
e.printStackTrace();
}
第四步：将图片压缩成图片格式
BitmapDrawable bitmapDrawable = (BitmapDrawable)MyApplication.getContextObject().getResources().getDrawable(R.drawable.account);
Bitmap bitmap=bitmapDrawable.getBitmap();
if (bitmap == null) {
Toast.makeText(MyApplication.getContextObject(), "图片不存在",Toast.LENGTH_LONG).show();
return;
}
bitmap.compress(Bitmap.CompressFormat.PNG, 100, fos);
try {
fos.flush();
fos.close();
Toast.makeText(MyApplication.getContextObject(), "图片保存在："+ finalImageFile.getAbsolutePath(), Toast.LENGTH_LONG).show();
} catch (IOException e) {
e.printStackTrace();
}
完整代码
String path=MyApplication.getContextObject().getExternalFilesDir("").toString();
File file=new File(path);
File finalImageFile = new File(file, System.currentTimeMillis() + ".jpg");
try {
finalImageFile.createNewFile();
} catch (IOException e) {
e.printStackTrace();
}
FileOutputStream fos = null;
try {
fos = new FileOutputStream(finalImageFile);
} catch (FileNotFoundException e) {
e.printStackTrace();
}
BitmapDrawable bitmapDrawable = (BitmapDrawable)MyApplication.getContextObject().getResources().getDrawable(R.drawable.account);
Bitmap bitmap=bitmapDrawable.getBitmap();
if (bitmap == null) {
Toast.makeText(MyApplication.getContextObject(), "图片不存在",Toast.LENGTH_LONG).show();
return;
}
bitmap.compress(Bitmap.CompressFormat.PNG, 100, fos);
try {
fos.flush();
fos.close();
Toast.makeText(MyApplication.getContextObject(), "图片保存在："+ finalImageFile.getAbsolutePath(), Toast.LENGTH_LONG).show();
} catch (IOException e) {
e.printStackTrace();
}
总结
