Base64 转位图以在 ImageView 中显示 [英] Base64 to Bitmap to display in ImageView

问题描述

我有这个代码，它获取已经使用 webservice 转换为字符串的 BLOB 图像.这是 JSON 输出.

I have this code which get BLOB image that is already converted to string using webservice. This is the JSON output.

{driver_name: "Anna Biendia"
 taxi_plate_no: "NUV 900"
 driver_contact_no: "09169271825"
 driver_operator: "grab"
 driver_operator_address: "987 Buendia St. California"
 image: "iVBORw0KGgoAAAANSUhEUgAACDQAAAXcCAYAAADXlEzmAAAACXBIWX..."}

这是我在 android 中获取 JSON 并将其显示在布局中的代码.除图像外，其他值均已显示.

This is my code in android which get the JSON and display it in the layout. The other values have been displayed except for the image.

public class DriverDetails extends Activity {
ArrayList<Objects> objectsList = new ArrayList<>();
String url = "http://192.168.1.110:8080/taxisafe3/displays/taxidetails";


@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_driver_details);

    new Task().execute(url);
}
public class Task extends AsyncTask<String, String, String> {

    @Override
    protected void onPreExecute() {
        super.onPreExecute();
    }

    @Override
    protected String doInBackground(String... strings) {
        String content = HttpULRConnect.getData(url);
        return content;
    }

    @Override
    protected void onPostExecute(String s) {
        try {
            TextView title1 = (TextView) findViewById(R.id.textView3);
            TextView title = (TextView) findViewById(R.id.textView2);
            TextView title2 = (TextView) findViewById(R.id.textView7);
            TextView title3 = (TextView) findViewById(R.id.textView9);
            TextView title4 = (TextView) findViewById(R.id.textView11);
            ImageView image = (ImageView) findViewById(R.id.imageView2);

            JSONArray ary = new JSONArray(s);
            for (int i = 0; i < ary.length(); i++) {
                JSONObject jsonobject = ary.getJSONObject(i);
                Objects objects = new Objects();
                objects.setDriver_name(jsonobject.getString("driver_name"));
                objects.setTaxi_plate_no(jsonobject.getString("taxi_plate_no"));
                objects.setDriver_operator(jsonobject.getString("driver_operator"));
                objects.setDriver_operator_address(jsonobject.getString("driver_operator_address"));
                objects.setDriver_contact_no(jsonobject.getString("driver_contact_no"));
                objects.setImage(jsonobject.getString("image"));
                objectsList.add(objects);


                if (title1 != null){
                    title1.setText(objects.getDriver_name());
                }
                if (title != null){
                    title.setText(objects.getTaxi_plate_no());
                }
                if (title2 != null){
                    title2.setText(objects.getDriver_operator());
                }
                if (title3 != null){
                    title3.setText(objects.getDriver_operator_address());
                }
                if (title4 != null){
                    title4.setText(objects.getDriver_contact_no());
                }
                if(image != null){
                    byte[] decodedString = Base64.decode(objects.getImage(), Base64.DEFAULT);
                    Bitmap decodedByte = BitmapFactory.decodeByteArray(decodedString, 0, decodedString.length);
                    image.setImageBitmap(decodedByte);
                }
            }

        } catch (JSONException e) {
            e.printStackTrace();
        }
}
}
}

我的代码有什么问题，为什么图像没有显示在 ImageView 中?提前致谢.:)

What is wrong in my code why the image doesn't display in ImageView? Thanks in advance. :)

推荐答案

将base64转换为位图

byte[] decodedString = Base64.decode(objects.getImage(), Base64.DEFAULT);
Bitmap decodedByte = BitmapFactory.decodeByteArray(decodedString, 0, decodedString.length);

将位图调整为 Imageview 的高度和宽度

image.setImageBitmap(Bitmap.createScaledBitmap(decodedByte, image.getWidth(), image.getHeight(), false));

这篇关于Base64 转位图以在 ImageView 中显示的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！