Android 从膨胀布局添加视图以及如何更新布局中的特定文本视图值

Question

我通过膨胀单独的布局创建了视图。我使用 for 循环创建视图超过 5 个视图，如 ListView。在这里，我要检查通话余额。在视图内部，我将单击余额按钮，一旦收到来自服务器的响应，我想在现有创建的视图中更新特定的 TextView。有什么帮助吗？我期望电话应用余额检查页面也一样。 同时滚动，它不应该隐藏更新的余额。我的参考堆栈链接： Updating a textview in different layout xml from the main activity

Create a custom View by inflating a layout? 我的示例代码：

for (int i=0; i<AccNoList.size; i++) {
    LayoutInflater inflater = (LayoutInflater)getBaseContext().getSystemService(Context.LAYOUT_INFLATER_SERVICE);
    View v =  inflater.inflate(R.layout.my_table_row, myTable, true);
    inflater.setId(i);
    ImageButton balancebtn = (ImageButton) v.findViewById(R.id.balancebtn);
    TextView    textview_accnumber   = (TextView)    v.findViewById(R.id.textview_accnumber);
    textview_accnumber.setText("Text for this row");
    balancebtn.setId(i); // So that when it is clicked we know which one has been clicked!
    balancebtn.setOnClickListener(new View.OnClickListener() {
    @Override
    public void onClick(View view) {
    // once received value from server, i want to update the same row textview balance.
    checkBalance(i);
    }
    });          
    textview_accnumber.setId(i);
    tr.setId(i);
    textview_accnumber.setText(AccNoList.get(i));

    linearlayout.addView(inflater);
}

Answer 1

要更新视图属性，您必须存储该视图引用。 在您的情况下，存储您通过膨胀单独的布局创建的视图。

View view1 = LayoutInflater.from(context).inflate(layoutId, parent, false);
View view2 = LayoutInflater.from(context).inflate(layoutId, parent, false);
View view3 = LayoutInflater.from(context).inflate(layoutId, parent, false);

然后当您收到服务器的响应时，通过findViewById() 方法获取要更新的子视图的引用并更新子视图的属性。

示例：

TextView textView1 = view1.findViewById(viewId);
textView1.setText("Updated Text");

TextView textView2 = view2.findViewById(viewId);
textView2.setText("Updated Text");

编辑

// declare it as global
View views[] = new View[size]

for (int i=0; i<AccNoList.size; i++) {
  LayoutInflater inflater = (LayoutInflater)getBaseContext().getSystemService(Context.LAYOUT_INFLATER_SERVICE);
  views[i] =  inflater.inflate(R.layout.my_table_row, myTable, true);
   //inflater.setId(i);
  ImageButton balancebtn = (ImageButton) views[i].findViewById(R.id.balancebtn);
  TextView    textview_accnumber   = (TextView)    views[i].findViewById(R.id.textview_accnumber);
  textview_accnumber.setText("Text for this row");
   // balancebtn.setId(i); // So that when it is clicked we know which one has been clicked!
  balancebtn.setOnClickListener(new View.OnClickListener() {
     @Override
     public void onClick(View view) {
     // once received value from server, i want to update the same row textview balance.
       checkBalance(i);
    }
  });          
  //textview_accnumber.setId(i);
  //tr.setId(i);
  textview_accnumber.setText(AccNoList.get(i));

  linearlayout.addView(inflater);
}

checkBalance方法

public void checkBalance(final int position){
  // .................
  // ..............
 // after received response
    updateStatus(position);
}

updateStatus方法

private void updateStatus(int position, String text){
  if(position < views.length){
     TextView textview_accnumber = (TextView)views[i].findViewById(R.id.textview_accnumber);
     if(textview_accnumber != null)
       textview_accnumber.setText(text);
  }
}

Answer 2

您可以使用视图数组轻松识别它们。

View[] viewlist=new View[AccNoList.size];
    for (int i=0; i<AccNoList.size; i++) {
        LayoutInflater inflater = (LayoutInflater)getBaseContext().getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        viewlist[i]=  inflater.inflate(R.layout.my_table_row, myTable, true);
        inflater.setId(position);
        ...
        balancebtn.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
        // once received value from server, i want to update the same row textview balance.

        checkBalance(position);
        ((TextView)viewlist[i].findViewById(that_id)).setText("Your Text");
        }
        });          
       ...
    }