Android实现
调用系统相机,拍照:
Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
getFileUri();
intent.putExtra(MediaStore.EXTRA_OUTPUT, file_uri);
startActivityForResult(intent, CODE_CAMERA);
private void getFileUri() {
image_name = Calendar.getInstance().getTimeInMillis() + ".jpg";
file = new File(Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES) + File.separator + image_name);
file_uri = Uri.fromFile(file);
}
在onActivityResult里面接收图片并Base64处理:
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
if (requestCode == CODE_CAMERA && resultCode == RESULT_OK) {
new EncodeImage().execute(); //把bitmap转换成base64字符串
}
}
EncodeImage是一个AsyncTask,doInBackground里面从uri里面获取bitmap,然后转入输出流,最终转换为base64编码字符串:
@Override
protected Void doInBackground(Void... voids) {
bitmap = BitmapFactory.decodeFile(file_uri.getPath());
ByteArrayOutputStream stream = new ByteArrayOutputStream();
bitmap.compress(Bitmap.CompressFormat.JPEG, 80, stream);
byte[] array = stream.toByteArray();
encoded_string = Base64.encodeToString(array, 0);
bitmap.recycle(); //防止oom
return null;
}
然后就可以上传到服务器了:
private void uploadImage() {
HashMap<String, String> map = new HashMap<>();
map.put("encoding_string", encoded_string);
map.put("image_name", image_name);
OkHttpUtils.post()
.url("http:192.168.0.112/phpdemo/uploadimage.php")
.params(map)
.tag(this)
.build()
.execute(new StringCallback() {
@Override
public void onError(Call call, Exception e, int id) {
Log.e("出错了", "错误信息:" + e.getMessage());
}
@Override
public void onResponse(String response, int id) {
Log.e("成功or失败", "信息:" + response);
}
});
}
在上传服务器过程中,遇到两个问题,第一,提示POST Content-Length of ... bytes exceeds the limit of 8388608 bytes
,这个错误是因为php默认最大post上传8M,更改php.ini里面的post_max_size=1000M
就ok了;第二,当第二次拍照的时候会出现OOM的情况,检查代码发现bitmap没有recycle。
OVER
本文地址: http://xpleeandroid.github.io/2016/07/22/android-upload-img-to-php-server-2/