Question

因此，仅此而已，这是我的代码，当我尝试使用Edittext和用于将数据保存到listView的按钮时，它可以正常工作，并且所有项目都显示在列表视图中，但是看起来像在下面，它仅显示一个...

public class History extends Activity {

ListView show;
Button Home, toMap, Next;
EditText listTextMaker;
ArrayList<String> addArray = new ArrayList<String>();
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_history);
    Home = findViewById(R.id.homeBtn);
    toMap = findViewById(R.id.backBtn);
    Next = findViewById(R.id.nextBtn);
    show = findViewById(R.id.textHistory);
    listTextMaker = findViewById(R.id.text);
    listTextMaker.setVisibility(View.INVISIBLE);


    ConstructorBuilder();

}

public void Constructor(){

    SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(this);
    String dataHistory = prefs.getString("History", null );
    addArray.add(dataHistory);
    ArrayAdapter<String> adapter = new ArrayAdapter<String>(History.this, android.R.layout.simple_expandable_list_item_1, addArray);
    show.setAdapter(adapter);


}

public void ConstructorBuilder(){
    Constractor();


    }

}

Answer 1

您仅在列表中添加一个数据：

String dataHistory = prefs.getString("History", null );
addArray.add(dataHistory);

如果您需要多个数据，则只需使用以下代码：

    String dataHistory = prefs.getString("History", null );
    addArray.add(dataHistory);
    addArray.add(dataHistory);
    addArray.add(dataHistory);
    addArray.add(dataHistory);
    addArray.add(dataHistory);

ListView仅显示Array中的一项

1 个答案: