Question

我正在尝试构建一个简单的短信应用程序，编辑页面列出了所有已保存的文件。我在编辑和删除的布局中给了2个按钮，但是当我点击它们时，我无法获取rowid（从顶部开始的行号）来检索对应于该特定行的短信..有人请帮助我..我的短信适配器并没有扩展任何东西。这是我的类和xml文件..

public class SMSEdit extends ListActivity{

 private SMSDbAdapter mDbHelper;
 //private Button editsmsbtn, deletesmsbtn;

 public void onCreate(Bundle savedInstanceState) {

  super.onCreate(savedInstanceState);
    setContentView(R.layout.editsmslist);

    mDbHelper = new SMSDbAdapter(this);
    mDbHelper.open();
    fillData();

}

 public void fillData() {
     Cursor smsCursor = mDbHelper.fetchAllNotes();
     startManagingCursor(smsCursor);

     // Create an array to specify the fields we want to display in the list (only TITLE)
     String[] from = new String[]{SMSDbAdapter.KEY_TITLE,
       SMSDbAdapter.KEY_BODY, 
       SMSDbAdapter.KEY_DATE, 
       SMSDbAdapter.KEY_TIME};

     // and an array of the fields we want to bind those fields to (in this case just text1)
     int[] to = new int[]{R.id.smseditlistTO, 
       R.id.smseditlistMessage,
       R.id.smseditlistDay,
       R.id.smseditlistTime};

     // Now create a simple cursor adapter and set it to display
     SimpleCursorAdapter smsadap = 
         new SimpleCursorAdapter(this, R.layout.smsrow, smsCursor, from, to);
     setListAdapter(smsadap);

 }

  public void myEditClickHandler(View v) 
 {
  //get the row the clicked button is in
  LinearLayout vwParentRow = (LinearLayout)v.getParent();

  Button btnChild = (Button)vwParentRow.getChildAt(4);

  btnChild.setText("I've been clicked!");

  ListAdapter pos = getListAdapter();

  Intent intent = new Intent();
      intent.setClass(SMSEdit.this, SMS.class);
     // intent.putExtra(SMSDbAdapter.KEY_ROWID, id);

      startActivity(intent);
      finish();
 }
  public void myDeleteClickHandler(View v) 
 {

  //get the row the clicked button is in
  LinearLayout vwParentRow = (LinearLayout)v.getParent();

  //TextView child = (TextView)vwParentRow.getChildAt(0);
  Button btnChild = (Button)vwParentRow.getChildAt(5);
  //btnChild.setText(child.getText());
  btnChild.setText("I've been clicked!");

 int c = Color.CYAN;

   vwParentRow.setBackgroundColor(c); 
vwParentRow.refreshDrawableState();

         }
 }

editsmslist.xml - ＆gt;＆gt;

 <?xml version="1.0" encoding="utf-8"?>
<LinearLayout
  xmlns:android="http://schemas.android.com/apk/res/android"
  android:layout_width="wrap_content"
  android:layout_height="wrap_content">
<ListView android:id="@+id/android:list"
          android:layout_width="wrap_content"
         android:layout_height="wrap_content"/>
   <TextView android:id="@+id/android:empty"
          android:layout_width="wrap_content"
     android:layout_height="wrap_content"
     android:text="No Future SMS Yet" android:textSize="35px"/>
</LinearLayout>

smsrow.xml - ＆gt;＆gt;

    <?xml version="1.0" encoding="utf-8"?>
    <ScrollView 
 android:id="@+id/ScrollView01" 
android:layout_width="fill_parent" 
android:layout_height="fill_parent" 
xmlns:android="http://schemas.android.com/apk/res/android">

<LinearLayout 
 android:id="@+id/LinearLayout02"
       android:layout_width="wrap_content" 
      android:layout_height="wrap_content" 
       android:orientation="vertical">
      <LinearLayout android:id="@+id/LinearLayout03"                      android:layout_width="wrap_content" android:layout_height="wrap_content">
            <TextView android:layout_height="wrap_content"                     android:layout_width="fill_parent" android:text="@string/smsdetailseditlist"       android:id="@+id/smseditlistTO" android:paddingLeft="5px">
              </TextView>

               <TextView android:layout_height="wrap_content"     android:text="@string/smsdetailseditlist" android:id="@+id/smseditlistMessage"        android:paddingLeft="20px" android:maxLines="1" android:layout_width="wrap_content">
            </TextView>
</LinearLayout>

       <LinearLayout android:id="@+id/LinearLayout01" 
         android:layout_width="wrap_content" 
        android:layout_height="wrap_content" 
       android:orientation="horizontal" android:paddingLeft="5px">

         <TextView android:layout_width="wrap_content"       android:layout_height="wrap_content" android:text="Date: "></TextView><TextView                 android:text="@string/smsdetailseditlist" android:id="@+id/smseditlistDay"          android:layout_width="wrap_content" android:layout_height="wrap_content"></TextView>
            <TextView android:layout_width="wrap_content"               android:layout_height="wrap_content" android:text="Time: " android:paddingLeft="5px">               </TextView><TextView android:text="@string/smsdetailseditlist"                 android:id="@+id/smseditlistTime" android:layout_width="wrap_content"                android:layout_height="wrap_content" android:paddingRight="10px"></TextView>
            <Button  android:layout_width="wrap_content"          android:layout_height="wrap_content" android:id="@+id/EditSMSButton"          android:text="@string/editsms" android:onClick="@string/myEditClickHandler"></Button>
            <Button android:layout_width="wrap_content"        android:layout_height="wrap_content" android:id="@+id/DeleteSMSButton"            android:text="@string/deletesms" android:onClick="@string/myDeleteClickHandler"></Button>
         </LinearLayout>
       </LinearLayout>
      </ScrollView>

另外请建议是否有更好的方法来实现这一点或使布局看起来更好......

Answer 1

你可以像这样扩展一个cursorAdapter ......

public class exampleAdapter extends CursorAdapter
 {
     LayoutInflater inflater; 
    public exampleAdapter (Context context, Cursor c) {
        super(context, c);
        inflater = LayoutInflater.from(context);
    }

    @Override
    public void bindView(View view, Context context, Cursor cursor) {
        // TODO Auto-generated method stub
        Button btn_del = (Button)view.findViewById(R.id.button1);
btn_del.setOnClickListener(new View.OnClickListener() {

            @Override
            public void onClick(View v) {
                // TODO Auto-generated method stub
                SMSDbAdapter vb = new SMSDbAdapter(context);
                vb.open();
                String xyz = cursor.getString(0); //Persumably your ID

                vb.Delete(Integer.parseInt(cursor.getString(0)));
                Toast.makeText(context, xyz + " Deleted!", Toast.LENGTH_SHORT).show();
                vb.close(); 

            }
        });


    }

    @Override
    public View newView(Context context, Cursor cursor, ViewGroup parent) {

        return inflater.inflate(R.layout.smsrow, parent, false);

    }        
 }

Answer 2

我的ListView遇到了类似的问题。

假设您正在动态填充ListView。你有5行（例如）。第一行的id是1秒是2，依此类推。

滚动显示的任何行时，第1行的ID（您当前在屏幕上看到的）将始终为1.您需要通过使用mabye控制另一个类（XYZ）

我只是使用了ArrayList<XYZ>而且效果很好。

您可以在SMSAdapter：

中覆盖此方法

public View getView(int position, View convertView, ViewGroup parent)

然后调用返回get(position)的{{1}}方法。

Answer 3

您应该使用ListView来显示您的消息。

将从数据库中检索到的数据存储在字符串数组中，例如s1。然后

private ArrayList<String> arr_sort = new ArrayList<String>(); 并使用add（）方法将整个s1复制到arr_sort中。

设置适配器

lv.setAdapter(new ArrayAdapter<String>(DataAttach.this, android.R.layout.simple_list_item_1, arr_sort)); 其中lv是ListView引用。

然后将此方法用于onClick

lv.setOnItemClickListener(new android.widget.AdapterView.OnItemClickListener() {
                public void onItemClick(AdapterView<?> parent, View view,
                        int position, long id) {
                    String item = (String) lv.getItemAtPosition(position);

                    Toast.makeText(*.this,
                            "You selected - " + item + " ,Please wait...",
                            Toast.LENGTH_LONG).show();

                    Intent intent = new Intent(*.this, *.class);
                    *.this.startActivity(intent);
                }
            });

希望这会有所帮助..

无法在android的列表视图中获取单击的行号

3 个答案: