如果您不想仅仅为了表明进度而膨胀另一个视图，请执行以下操作：

在列表视图的相同XML布局中创建ProgressBar。

让它居中

给它一个id

通过调用setEmptyView将它附加到listview实例变量

Android会关注进度条的可见性。

例如，在MainActivity.java中：

xmlns:tools="http://schemas.android.com/tools"

android:layout_width="match_parent"

android:layout_height="match_parent"

android:orientation="vertical"

tools:context="com.fcchyd.linkletandroid.MainActivity">

android:id="@+id/list_view_xml"

android:layout_width="match_parent"

android:layout_height="match_parent"

android:divider="@color/colorDivider"

android:dividerHeight="1dp" />

android:id="@+id/loading_progress_xml"

style="?android:attr/progress"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:layout_centerHorizontal="true"

android:layout_centerVertical="true" />

并在MainActivity.java：

package com.fcchyd.linkletandroid;

import android.os.Bundle;

import android.support.v7.app.AppCompatActivity;

import android.util.Log;

import android.widget.ArrayAdapter;

import android.widget.ListView;

import java.util.ArrayList;

import java.util.List;

import retrofit2.Call;

import retrofit2.Callback;

import retrofit2.Response;

import retrofit2.Retrofit;

import retrofit2.converter.gson.GsonConverterFactory;

public class MainActivity extends AppCompatActivity {

final String debugLogHeader = "Linklet Debug Message";

Call call;

List arraylistLink;

ListView linksListV;

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

linksListV = (ListView) findViewById(R.id.list_view_xml);

linksListV.setEmptyView(findViewById(R.id.loading_progress_xml));

arraylistLink = new ArrayList<>();

Retrofit retrofit = new Retrofit.Builder()

.baseUrl("https://api.links.linklet.ml")

.addConverterFactory(GsonConverterFactory

.create())

.build();

HttpsInterface HttpsInterface = retrofit

.create(HttpsInterface.class);

call = HttpsInterface.httpGETpageNumber(1);

call.enqueue(new Callback() {

@Override

public void onResponse(Call call, Response response) {

try {

arraylistLink = response.body().getLinks();

String[] simpletTitlesArray = new String[arraylistLink.size()];

for (int i = 0; i < simpletTitlesArray.length; i++) {

simpletTitlesArray[i] = arraylistLink.get(i).getTitle();

}

ArrayAdapter simpleAdapter = new ArrayAdapter<>(MainActivity.this, android.R.layout.simple_list_item_1, simpletTitlesArray);

linksListV.setAdapter(simpleAdapter);

} catch (Exception e) {

Log.e("erro", "" + e);

}

}

@Override

public void onFailure(Call call, Throwable t) {

}

});

}

}