将方法移至另一个Java类,并从原始类中调用该方法
Posted
tags:
篇首语:本文由小常识网(cha138.com)小编为大家整理,主要介绍了将方法移至另一个Java类,并从原始类中调用该方法相关的知识,希望对你有一定的参考价值。
尊敬的程序专家!
我需要将方法移至另一个Java类的帮助。
我有一个名为ProfileList.java的Java类,其中包含以下代码:
package dk.timeleft.versionone;
import androidx.appcompat.app.AppCompatActivity;
import android.os.AsyncTask;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;
import android.widget.Toast;
import org.json.JSONException;
import org.json.JSONObject;
import java.io.IOException;
import okhttp3.Call;
import okhttp3.Callback;
import okhttp3.FormBody;
import okhttp3.OkHttpClient;
import okhttp3.Request;
import okhttp3.RequestBody;
import okhttp3.Response;
public class ProfileList extends AppCompatActivity {
Button btnGet;
Button btnPost;
TextView txtResult;
public String url;
public String postUrl;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_profile_list);
btnGet = (Button) findViewById(R.id.btnGet);
btnPost = (Button) findViewById(R.id.btnPost);
txtResult = (TextView) findViewById(R.id.txtResult);
btnGet.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
txtResult.setText("Retrieving GET-data");
url = "https://kairosplanner.com/api/timeleft.php";
try {
getResponse();
} catch (IOException e) {
e.printStackTrace();
}
}
});
btnPost.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
txtResult.setText("Retrieving POST-data");
postUrl = "https://kairosplanner.com/api/timeleft2.php/";
RequestBody postBody = new FormBody.Builder()
.add("first_name", "Hans")
.add("last_name", "Schmidt")
.build();
try {
postRequest(postUrl, postBody);
} catch (IOException e) {
e.printStackTrace();
}
}
});
}
void postRequest(String postUrl, RequestBody postBody) throws IOException {
OkHttpClient client = new OkHttpClient();
Request request = new Request.Builder()
.url(postUrl)
.post(postBody)
.build();
client.newCall(request).enqueue(new Callback() {
@Override
public void onFailure(Call call, IOException e) {
call.cancel();
}
@Override
public void onResponse(Call call, Response response) throws IOException {
final String myResponse = response.body().string();
ProfileList.this.runOnUiThread(new Runnable() {
@Override
public void run() {
try {
JSONObject json = new JSONObject(myResponse);
//txtString.setText("First Name: "+json.getJSONObject("data").getString("first_name") + "\nLast Name: " + json.getJSONObject("data").getString("last_name"));
txtResult.setText(json.toString());
} catch (JSONException e) {
e.printStackTrace();
}
}
});
}
});
}
void getResponse() throws IOException {
OkHttpClient client = new OkHttpClient();
Request request = new Request.Builder()
.url(url)
.build();
client.newCall(request).enqueue(new Callback() {
@Override
public void onFailure(Call call, IOException e) {
call.cancel();
}
@Override
public void onResponse(Call call, Response response) throws IOException {
final String myResponse = response.body().string();
ProfileList.this.runOnUiThread(new Runnable() {
@Override
public void run() {
try {
JSONObject json = new JSONObject(myResponse);
//txtString.setText("First Name: "+json.getJSONObject("data").getString("first_name") + "\nLast Name: " + json.getJSONObject("data").getString("last_name"));
txtResult.setText(json.toString());
Toast.makeText(ProfileList.this,"Hello",Toast.LENGTH_SHORT).show();
} catch (JSONException e) {
e.printStackTrace();
}
}
});
}
});
}
public class OkHttpHandler extends AsyncTask<String, Void, String> {
OkHttpClient client = new OkHttpClient();
@Override
protected String doInBackground(String... params) {
Request.Builder builder = new Request.Builder();
builder.url(params[0]);
Request request = builder.build();
try {
Response response = client.newCall(request).execute();
return response.body().string();
} catch (Exception e) {
e.printStackTrace();
}
return null;
}
@Override
protected void onPostExecute(String s) {
super.onPostExecute(s);
//txtString.setText(s);
}
}
}
这可以正常工作,但是我想让我的代码整洁。我还将在其他Java类中经常使用POST和GET函数(postRequest和getResponse方法),因此,如果这些方法(包括OkHttpHandler类)适合单独的Java类,那会更好。 ApiCommunicator.java,然后从那里调用方法。
我发现了很多有关如何重构的信息,但这只是删除了当前的ProfileList.java类。
我还试图将方法(postRequest,getResponse和OkHttpHandler复制到ApiCommunicator.java(然后从ProfileList.java中删除这些方法),但是这还带来了其他一些问题,例如,OnResponse方法中可运行的.runOnUiThread。 postRequest和getResponse-引用ProfileList.this而不是动态Java类。
所以我的问题是:如何将方法从一个类移到另一个类,并从原始类调用该方法?
BTW:我正在使用IntelliJ
我希望有人可以帮助我解决这个问题。
已编辑:向ApiCommunicatorListener
添加了ApiCommunicator
接口,它需要由ProfileList活动实现以获取结果并分配txtResult TextView。
您可以像这样创建ApiCommunicator类:
public class ApiCommunicator<T extends AppCompatActivity & ApiCommunicator.ApiCommunicatorListener> {
private T activity;
public ApiCommunicator(T activity) {
this.activity = activity;
}
public void postRequest(String postUrl, RequestBody postBody) throws IOException {
OkHttpClient client = new OkHttpClient();
Request request = new Request.Builder()
.url(postUrl)
.post(postBody)
.build();
client.newCall(request).enqueue(new Callback() {
@Override
public void onFailure(Call call, IOException e) {
call.cancel();
}
@Override
public void onResponse(Call call, Response response) throws IOException {
final String myResponse = response.body().string();
activity.runOnUiThread(new Runnable() {
@Override
public void run() {
try {
JSONObject json = new JSONObject(myResponse);
activity.postRequestResult(json.toString());
} catch (JSONException e) {
e.printStackTrace();
}
}
});
}
});
}
public void getResponse() throws IOException {
OkHttpClient client = new OkHttpClient();
Request request = new Request.Builder()
.url(url)
.build();
client.newCall(request).enqueue(new Callback() {
@Override
public void onFailure(Call call, IOException e) {
call.cancel();
}
@Override
public void onResponse(Call call, Response response) throws IOException {
final String myResponse = response.body().string();
activity.runOnUiThread(new Runnable() {
@Override
public void run() {
try {
JSONObject json = new JSONObject(myResponse);
activity.getResponseResult(json.toString());
} catch (JSONException e) {
e.printStackTrace();
}
}
});
}
});
}
public interface ApiCommunicatorListener {
void postRequestResult(String result);
void getResponseResult(String result);
}
}
之后,您需要像这样在ProfileList活动中实现接口:
public class ProfileList extends AppCompatActivity implements ApiCommunicator.ApiCommunicatorListener {
然后您将把这两种方法添加到ProfileList:
@Override
public void postRequestResult(String result) {
txtResult.setText(result);
}
@Override
public void getResponseResult(String result) {
txtResult.setText(result);
}
最后使用ApiCommunicator:
ApiCommunicator apiCommunicator = new ApiCommunicator<>(this);
apiCommunicator.postRequest(...);
apiCommunicator.getRequest(...);
以上是关于将方法移至另一个Java类,并从原始类中调用该方法的主要内容,如果未能解决你的问题,请参考以下文章
Android 中如何在java类中调用activity 中的一个方法?