我想制作短信应用程序我有列表视图，其中有给我发短信但名字重复的人数

Question

我想制作短信应用我有列表视图，其中包含给我发短信但姓名重复的人数我的代码是

public class MainActivity extends AppCompatActivity {
        Cursor cursor;
        ListView listView;
@Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

    listView=findViewById(R.id.listview);
    ArrayList<String> contacts =new ArrayList<>();
    ArrayAdapter arrayAdapter=new ArrayAdapter(this,android.R.layout.simple_list_item_1,contacts);
    listView.setAdapter(arrayAdapter);

    cursor = getContentResolver().query(Uri.parse("content://sms"), null, null,null,null);
    cursor.moveToFirst();
    ActivityCompat.requestPermissions(MainActivity.this, new String[]{Manifest.permission.READ_SMS}, PackageManager.PERMISSION_GRANTED);
    String address = cursor.getString(cursor.getColumnIndex("address"));
        String body  = cursor.getString(cursor.getColumnIndex("body"));
            cursor.moveToFirst();
            while(cursor.moveToNext()){
                contacts.add("from: "+cursor.getString(cursor.getColumnIndex("address"))
+"\n"+cursor.getString(cursor.getColumnIndex("body")));

                cursor.moveToNext();
            }
            }
        }

如果我删除了 +"\n"+cursor.getString(cursor.getColumnIndex("body"))); 从 while 循环中我将得到所有给我发短信的人的号码 而且如果有人多次发给我，他的号码会重复多次 this is a screen shot

我应该怎么做才能在列表视图中显示每个号码之一

望谅解

Answer 1

将 while 循环更改为

while (cursor.moveToNext()) {
                String x = cursor.getString(cursor.getColumnIndex("address"));
                cursor.moveToNext();
            if (!check.contains(x)){
                contacts.add(x);
            }
        }

我想制作短信应用程序我有列表视图，其中有给我发短信但名字重复的人数

i want to make sms app I have list view that have the numbers of people who text me but the names is repeated

java

sms

listview

arraylist

android-studio