我正在尝试创建一个提供AsyncTask操作的Android库。我创建了我的AsyncTask,如下所示。但是,我不知道如何访问图书馆的资源。上下文字段由使用该库的活动设置。我曾经通过调用getActivity()。getResources()来访问资源。但是这个AsyncTask的上下文来自使用它的项目,我不知道如何访问库的资源。我怎样才能做到这一点?
public class CheckBalanceAsyncTask extends AsyncTask<Void, Void, Void> {
private Context mContext;
String json;
JSONObject jsonObject,jsonObjResult;
JSONArray jsonArray;
String message,balance;
ProgressDialog progress;
public CheckBalanceAsyncTask (Context context){
mContext = context;
//progress = new ProgressDialog(mContext);
}
@Override
protected void onPreExecute() {
super.onPreExecute();
// progress.setCancelable(false);
// progress.setMessage("please wait");//getString(R.string.pleasewait));
// progress.setTitle("waiting");//getString(R.string.loading));
// progress.setIcon(R.drawable.ic);
// progress.setProgressStyle(ProgressDialog.STYLE_SPINNER);
// progress.setProgress(0);
// progress.setMax(100);
// progress.show();
}
@Override
protected Void doInBackground(Void... params) {
String aliasNo = "";
PackageInfo pinfo = null;
try {
pinfo = mContext.getPackageManager().getPackageInfo(mContext.getPackageName(), 0);
} catch (NameNotFoundException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
String versionName = pinfo.versionName;
String cardServiceUrl = "blabla";
Log.e("LOGGGGG", cardServiceUrl);
try {
json = JSONParser.getJSONFromUrl(cardServiceUrl);
try {
jsonObject = new JSONObject(json);
} catch (JSONException e) {
Log.e("JSON Parser",
"Error creating json object" + e.toString());
}
jsonArray = jsonObject.getJSONArray("cardlist");
jsonObjResult = jsonObject.getJSONObject("result");
message = jsonObjResult.get("message").toString();
Log.e("MESSAGE", "" + message);
JSONObject row = jsonArray.getJSONObject(0);
balance = row.optString("balance");
}
catch (JSONException e) {
Log.e("json", "doInBackground2");
}
return null;
}
@Override
protected void onPostExecute(Void args) {
//progress.dismiss();
try {
if (jsonObjResult.get("message").toString()
.equalsIgnoreCase("ok")) {
Toast.makeText(mContext, balance+" TL", Toast.LENGTH_SHORT).show();
}
else {
Toast.makeText(mContext, message, Toast.LENGTH_SHORT).show();
}
} catch (JSONException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
答案 0 :(得分:1)
Ressources会自动与主应用程序合并,无需执行特定的操作来访问字符串,可绘制,布局等... getActivity()。getResources()可以正常工作。