Java android将字符串数组和字符串传递给asyncTask
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android passing String array and String to asyncTask
提问by user2886091
I would like to pass String array and String variable to my AsyncTask class. I am new to programming android apps so It is possible that this is not the most efficient way to achieve my goal. Anyways, I have String array called separate[] and String selected.
我想将字符串数组和字符串变量传递给我的 AsyncTask 类。我是编写 android 应用程序的新手，所以这可能不是实现我的目标的最有效方法。无论如何，我有一个名为separate[] 的String 数组，并选择了String。
In separate[] I have loaded values from EditText View and in selected, there is a value from my spinner. Now I want to work with these in my AsyncTask. My AsyncTask class looks now like this:
在单独的 [] 中，我从 EditText 视图中加载了值，并且在选择中，我的微调器中有一个值。现在我想在我的 AsyncTask 中使用这些。我的 AsyncTask 类现在看起来像这样：
final class cyklus extends AsyncTask<String[], Void, String[]>{
String[] tones = {"C","Cis","D","Dis","E","F","Fis","G","Gis","A","Ais","B"};
String[] result;
@Override
protected String[] doInBackground(String[]... params) {
int l =params.length; //length of separate[]
for(int k=0; k==l; k++){ // finding indexes of matches of elements separate[k] in tones[]
// INPUT POSITION
int i= Arrays.asList(tones).indexOf(params[k]);
// RESULT INDEX
int j =Integer.parseInt(selected);
int index = i+j;
// RESULT
String res=tones[index];
result[k]=res;
}
return result;
}
}
After this for loop is done, I would like my AsyncTask to return result[]. To sum up tis, I would like to know how can I work with "separate[]" and "selected" in my AsyncTask class. Thank you.
在这个 for 循环完成后，我希望我的 AsyncTask 返回结果 []。总而言之，我想知道如何在我的 AsyncTask 类中使用“separate[]”和“selected”。谢谢你。
EDIT: One more subquestion. My for loop wont start. Why? Thank you.
编辑：还有一个子问题。我的 for 循环无法启动。为什么？谢谢你。
回答by johntheripp3r
Create a asynctask constructor like this
创建一个像这样的 asynctask 构造函数
public class Blah extends AsyncTask<... , ... , ...>
{
String one;
String[] two;
public Blah(String one, String[] two)
{
this.one = one;
this.two = two;
}
onPreExe.....
doInBack....
onPostExe....
}
From Activity
从活动
Blah b = new Blah("abc", new String[]{"a", "b","c"};b.execute(...);
Blah b = new Blah("abc", new String[]{"a", "b","c"};b.execute(...);
回答by deniz
Write a constructor and pass values using it.
编写一个构造函数并使用它传递值。
public cyklus(Context context,String[] tones){
this.context = context;
this.tones = tones;
}
回答by Tabrej Khan
I don't know from where selectedvalue is coming in
我不知道选定的值来自哪里
// RESULT INDEX
int j =Integer.parseInt(selected);
But you can set the result like this by adding onPostExecute()
但是你可以通过添加 onPostExecute() 来设置这样的结果
final class cyklus extends AsyncTask<String[], Void, String[]> {
String[] tones = { "C", "Cis", "D", "Dis", "E", "F", "Fis", "G", "Gis",
"A", "Ais", "B" };
String[] result;
@Override
protected String[] doInBackground(String[]... params) {
int l = params.length; // length of separate[]
for (int k = 0; k == l; k++) { // finding indexes of matches of
// elements separate[k] in tones[]
// INPUT POSITION
int i = Arrays.asList(tones).indexOf(params[k]);
// RESULT INDEX
int j = Integer.parseInt(selected);
int index = i + j;
// RESULT
String res = tones[index];
result[k] = res;
}
return result;
}
@Override
protected void onPostExecute(String[] result)
{
super.onPostExecute(result);
//Set the result array to what ever object u want to
}
}
回答by M D
Change your method to look like this:defined globally
将您的方法更改为如下所示：全局定义
String[] tones = {"C","Cis","D","Dis","E","F","Fis","G","Gis","A","Ais","B"};
now, call your Async task like below:
现在，调用您的异步任务，如下所示：
new cyklus().execute(tones);
And now, change your Async task implementation
现在，更改您的异步任务实现
public class cyklus extends AsyncTask<String[], Void, String[]> {
ProgressDialog dialog;
@Override
protected void onPreExecute() {
dialog = new ProgressDialog(context);
dialog.setTitle("Calculating...");
dialog.setMessage("Please wait...");
dialog.setIndeterminate(true);
dialog.show();
}
protected String[] doInBackground(String[]... passing) {
String[] result = new String[10];
String[] passed = passing[0]; //get passed array
//Some calculations...
return result; //return result
}
protected void onPostExecute(String[] result) {
dialog.dismiss();
String minim = result.get(0);
}
This is how you implement AsyncTask. Hope this helps you.
这就是您实现 AsyncTask 的方式。希望这对你有帮助。
