修改了一部分代码，使用listview实现了浏览信息

app/src/main/java/hunnu/sj/raise_money/MainActivity.java

@@ -8,9 +8,12 @@ import android.os.Bundle;
 import com.google.android.material.floatingactionbutton.FloatingActionButton;
 import com.google.android.material.snackbar.Snackbar;
 
+import android.os.Handler;
+import android.os.Message;
 import android.view.MenuItem;
 import android.view.View;
 
+import androidx.annotation.NonNull;
 import androidx.appcompat.app.ActionBarDrawerToggle;
 import androidx.core.content.ContextCompat;
 import androidx.fragment.app.ListFragment;
@@ -46,6 +49,15 @@ public class MainActivity extends AppCompatActivity implements AdapterView.OnIte
     Context mContext;
     private NewsAdapter newsAdapter;
     private ListView lv_news;
+    private Handler mhandler = new Handler(){
+        @Override
+        public void handleMessage(@NonNull Message msg) {
+            super.handleMessage(msg);
+            if(msg.what==1){
+                newsAdapter.notifyDataSetChanged();
+            }
+        }
+    };
     @Override
     protected void onCreate(Bundle savedInstanceState) {
 
@@ -143,8 +155,11 @@ public class MainActivity extends AppCompatActivity implements AdapterView.OnIte
     private class UploadThread extends Thread{
         @Override
         public void run() {
-            NewsUtils.getAllNews(mContext,list);
+            Message message = mhandler.obtainMessage();
-            newsAdapter.notifyDataSetChanged();
+            int isload = NewsUtils.getAllNews(mContext,list);
+            message.what = isload;
+            mhandler.sendMessage(message);
+            //newsAdapter.notifyDataSetChanged();
         }
     }