无法在图像视图上动态设置图像

Question

大家好我正在使用天气 API 来获取天气数据

    public class Weather extends Activity {
        String city;
        public TextView t,tmin,tmax;
        ImageView icon;
        String img;
        private static final String API_URL = "http://api.openweathermap.org/data/2.5/weather?q=";
        private static final String MAIN = "main";
        private static final String TEMP = "temp";
        private static final String TEMP_MIN = "pressure";
        private static final String TEMP_MAX = "temp_max";

    JSONObject data = null;

    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.weather);
        t = (TextView) findViewById(R.id.temp);
        tmin = (TextView) findViewById(R.id.minTemp);
        tmax = (TextView) findViewById(R.id.maxTemp);
        icon=(ImageView)findViewById(R.id.imageView);
        city = getIntent().getExtras().getString("city_name");
        new JSONParse().execute();

    }

    @Override
    public void onBackPressed() {
        super.onBackPressed();
        t.setText("N/A");
        tmin.setText("N/A");
        tmax.setText("N/A");
    }

    private class JSONParse extends AsyncTask<String, String, JSONObject> {
        private ProgressDialog progressDialog;

        protected void onPreExecute() {

            super.onPreExecute();
            progressDialog = new ProgressDialog(Weather.this);
            progressDialog.setMessage("Getting Data...");
            progressDialog.setIndeterminate(false);
            progressDialog.setCancelable(true);
            progressDialog.show();
        }

        @Override
        protected JSONObject doInBackground(String... strings) {
            JSONParser jParser = new JSONParser();
            JSONObject json = jParser.getJSONFromUrl(API_URL + city);

            return json;
        }


        protected void onPostExecute(JSONObject json) {
            progressDialog.dismiss();
            try {
                JSONArray arr=null;
                data = json.getJSONObject(MAIN);
                arr=json.getJSONArray("weather");
                JSONObject obj=arr.getJSONObject(0);
                String conditon=obj.getString("description");
                double tmp = data.getDouble(TEMP);
                double tmn = data.getDouble(TEMP_MIN);
                double tmx = data.getDouble(TEMP_MAX);
                img=obj.getString("icon");
//                int resource=getResources().getIdentifier("@drawable/icons/"+img,null,null);
//                Drawable drw=getResources().getDrawable(resource);
//                icon.setImageDrawable(drw);

                t.setText("" +Math.floor(tmp-273.15)+"°C");
                tmax.setText("" + img);
                tmin.setText("" + conditon);

            } catch (Exception e) {
                Log.i("Inside Weather :",""+e);
                e.printStackTrace();


            }

我评论的部分不工作请提出解决方案。谢谢

Answer 1

在 getResources().getDrawable(resource) 处，您应该使用由 aapt 工具生成的资源标识符（如 R.drawable.app_icon），它更容易由 R 资源定义。而且这个方法也有贬义，所以推荐使用：

ContextCompat.getDrawable(getApplicationContext(), R.drawable.[your_image_path]) 就像 post

或icon.setImageResource(R.drawable.[your_image_path])

Answer 2

要为 imageView 设置图像试试这个 icon.setImageResource(R.drawable.icons);

Answer 3

你可以设置drawable名称如下

Resources res = getResources();
String mDrawableName = "your_drawable_name";// i.e. icon
int resID = res.getIdentifier(mDrawableName , "drawable", getPackageName());
Drawable drawable = res.getDrawable(resID );
icon.setImageDrawable(drawable );

无法在图像视图上动态设置图像

Unable to set an image on imageview dyanamically

android

imageview