如何使用BaseAdapter通過單擊按鈕將EditText值添加到ListView

我在我的自定義ListView中創建了三個TextView，並且我想在Arraylist中添加值，因此我創建了代碼，並且可以添加項目，比如第21行。但是我想要使用Edittext和按鈕添加。所以我在ListViewAdapter中創建了函數'additem'。如果單擊memberActivity中的'btndone'按鈕，'additem'將會運行。但沒有任何反應，沒有什麼變化.....請教如何解決..如何使用BaseAdapter通過單擊按鈕將EditText值添加到ListView

* memberActivity.java

protected void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.activity_member); 

    final ListView listview; 
    final ListViewAdapter adapter; 
    final ArrayList<String> items = new ArrayList<String>(); 

    mylist = (ListView) findViewById(R.id.listview1); 
    final LinearLayout linewarLayout1 = (LinearLayout) findViewById(R.id.addmember); 
    final LinearLayout linewarLayout2 = (LinearLayout) findViewById(R.id.buttongroup); 

    // Create Adapter 
    adapter = new ListViewAdapter(); 

    // Refer to list view and adapter 
    listview = (ListView) findViewById(R.id.listview1); 
    listview.setAdapter(adapter); 

    // add 1st item. 
    adapter.addItem("오정엽", 
      "201102087", "컴퓨터공학"); 
    // add 2nd item. 
    adapter.addItem("임경원", 
      "201203074", "소프트웨어공학"); 
    // add 3rd item. 
    adapter.addItem("심준식", 
      "201405938", "소프트웨어공학"); 


    Button addButton = (Button) findViewById(R.id.add); 
    addButton.setOnClickListener(new Button.OnClickListener() { 
     public void onClick(View v) { 
      mylist.setVisibility(View.INVISIBLE); 
      linewarLayout2.setVisibility(View.INVISIBLE); 
      linewarLayout1.setVisibility(View.VISIBLE); 
     } 
    }); 

    final EditText name = ((EditText) findViewById(R.id.etName)); 
    final EditText ID = ((EditText) findViewById(R.id.etID)); 
    final EditText Major = ((EditText) findViewById(R.id.etMajor)); 

    Button btnDone = (Button) findViewById(R.id.btnDone); 
    btnDone.setOnClickListener(new Button.OnClickListener() { 
     public void onClick(View v) { 

      TextView cnttxt = (TextView)findViewById(R.id.count); 
      cnttxt.setText(adapter.getCount()); 

      adapter.addItem(name.getText().toString(), ID.getText().toString(), Major.getText().toString()); 
      name.setText(""); 
      ID.setText(""); 
      Major.setText(""); 
      mylist.setVisibility(View.VISIBLE); 
      linewarLayout2.setVisibility(View.VISIBLE); 
      linewarLayout1.setVisibility(View.INVISIBLE); 
     } 
    });

* ListViewItem.java

public void setname(String name) { 
    nameStr = name ; 
} 
public void setID(String ID) { 
    IDStr = ID ; 
} 
public void setmajor(String major) { 
    majorStr = major ; 
} 

public String getname() { 
    return this.nameStr ; 
} 
public String getID() { 
    return this.IDStr ; 
} 
public String getmajor() { 
    return this.majorStr ; 
}

* ListViewAdapter.java

public class ListViewAdapter extends BaseAdapter { 
private ArrayList<ListViewItem> listViewItemList = new ArrayList<ListViewItem>() ; 

public ListViewAdapter() { 

} 
    TextView nameTextView = (TextView) convertView.findViewById(R.id.list_name) ; 
    TextView IDTextView = (TextView) convertView.findViewById(R.id.list_ID) ; 
    TextView majorTextView = (TextView) convertView.findViewById(R.id.list_major) ; 

    ListViewItem listViewItem = listViewItemList.get(position); 

    nameTextView.setText(listViewItem.getname()); 
    IDTextView.setText(listViewItem.getID()); 
    majorTextView.setText(listViewItem.getmajor()); 

    return convertView; 
} 

public void addItem(String name, String ID, String major) { 
    ListViewItem item = new ListViewItem(); 

    item.setname(name); 
    item.setID(ID); 
    item.setmajor(major); 

    listViewItemList.add(item); 
}

}

來源

2016-11-21 Elessar

在'addItem（）'方法中，在方法結尾添加'notifyDatasetChanged（）'。 –

添加數據後調用'notifyDatasetChanged（）'。它會工作。

來源

2016-11-22 05:40:35

如何使用BaseAdapter通過單擊按鈕將EditText值添加到ListView

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