Android：添加小部件时出错

Question

我是新手。

我想添加3个EditText的时候，用户点击一个按钮。

我试着去实现它，但它不工作。

控件不会显示。

P.S.小工具必须在其他布局中。

谢谢你的帮助。 对不起，我的英语不好。

<?xml version="1.0" encoding="utf-8"?> 
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 
    android:orientation="vertical" 
    android:layout_width="fill_parent" 
    android:layout_height="fill_parent" 
    android:background="@drawable/bg_fill" 
    android:id="@+id/simple_main_layout"> 

    <LinearLayout 
     android:orientation="vertical" 
     android:layout_width="fill_parent" 
     android:layout_height="fill_parent" 
     android:id="@+id/for_main_text"> 

     <LinearLayout 
      android:layout_width="fill_parent" 
      android:layout_height="60dp"> 

      <TextView 
       android:layout_width="wrap_content" 
       android:layout_height="wrap_content" 
       android:textAppearance="?android:attr/textAppearanceLarge" 
       android:text="Buy List" 
       android:id="@+id/textView" /> 

      <Button 
       style="?android:attr/buttonStyleSmall" 
       android:layout_width="67dp" 
       android:layout_height="wrap_content" 
       android:text="+" 
       android:id="@+id/do_new_list" 
       android:layout_marginLeft="153dp" 
       android:layout_marginRight="2dp" 
       android:background="@drawable/btn_yes" android:textColor="#804f29" android:textStyle="bold"/>/> 
     </LinearLayout> 

     <EditText 
      android:layout_width="305dp" 
      android:layout_height="wrap_content" 
      android:id="@+id/editText" /> 

     <LinearLayout 
      android:layout_width="fill_parent" 
      android:layout_height="fill_parent"> 

      <EditText 
       android:layout_width="91dp" 
       android:layout_height="wrap_content" 
       android:inputType="number" 
       android:ems="10" 
       android:id="@+id/editText2" /> 

      <EditText 
       android:layout_width="wrap_content" 
       android:layout_height="wrap_content" 
       android:inputType="number" 
       android:ems="10" 
       android:id="@+id/editText3" /> 

     </LinearLayout> 

    </LinearLayout> 


</LinearLayout> 

代码：

private Button do_new_field; 
    private EditText[] text, many, cost; 
    private final int fields = 50; 
    private int last_field = 0; 
    private LinearLayout layoutik; 
    LinearLayout.LayoutParams layoutParams; 
    LinearLayout.LayoutParams layoutParams2; 

@Override 
public void onBackPressed() { 
    super.onBackPressed(); 


} 

public void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.create_buy); 

    do_new_field = (Button) findViewById(R.id.do_new_list); 
    layoutik = (LinearLayout) findViewById(R.id.for_main_text); 
    do_new_field.setOnClickListener(this); 

    text = new EditText[fields]; 
    many = new EditText[fields]; 
    cost = new EditText[fields]; 

    layoutParams = 
      new LinearLayout.LayoutParams(LinearLayout.LayoutParams.WRAP_CONTENT, LinearLayout.LayoutParams.MATCH_PARENT,0f); 

    layoutParams2 = 
      new LinearLayout.LayoutParams(LinearLayout.LayoutParams.FILL_PARENT, LinearLayout.LayoutParams.FILL_PARENT,0f); 
} 

@Override 
public void onClick(View view) { 
    if(view == do_new_field) 
    { 

     if(last_field <= fields) 
     { 
      text[last_field] = new EditText(this); 
      many[last_field] = new EditText(this); 
      cost[last_field] = new EditText(this); 

      text[last_field].setWidth(305); 
      text[last_field].setHeight(LinearLayout.LayoutParams.WRAP_CONTENT); 
      text[last_field].setMaxLines(3); 

      many[last_field].setWidth(91); 
      many[last_field].setHeight(LinearLayout.LayoutParams.WRAP_CONTENT); 
      many[last_field].setInputType(InputType.TYPE_CLASS_NUMBER); 
      many[last_field].setMaxLines(1); 

      cost[last_field].setWidth(LinearLayout.LayoutParams.WRAP_CONTENT); 
      cost[last_field].setHeight(LinearLayout.LayoutParams.WRAP_CONTENT); 
      cost[last_field].setInputType(InputType.TYPE_CLASS_NUMBER); 
      cost[last_field].setMaxLines(1); 

      text[last_field].setId(100 + last_field); 
      many[last_field].setId(200 + last_field); 
      cost[last_field].setId(300 + last_field); 

      text[last_field].setLayoutParams(layoutParams); 
      many[last_field].setLayoutParams(layoutParams); 
      cost[last_field].setLayoutParams(layoutParams); 

      layoutik.addView(text[last_field]); 
      layoutik.addView(many[last_field]); 
      layoutik.addView(cost[last_field]); 

      last_field++; 
    } 
} 

}}

Answer 1

You might have to add "setId" to the editText and check. 

    TableLayout.LayoutParams params = new TableLayout.LayoutParams(
      LayoutParams.FILL_PARENT, LayoutParams.WRAP_CONTENT, 0f); 

    editText.setId(EDT_ID + sub_count + i); 
    editText.setTag(insertAdAl.get(i).getmApiAppend()); 
    editText.setLayoutParams(params); 
    editText.setTextAppearance(NewAdverts.this, 
      android.R.style.TextAppearance_Small); 
     editText.setGravity(Gravity.LEFT | Gravity.CENTER); 
    editText.setPadding(4, 4, 4, 4); 
    editText.setTextAppearance(NewAdverts.this, 
      android.R.attr.textAppearanceSmall); 
    editText.setTextColor(Color.BLACK); 
    editText.setBackgroundResource(R.drawable.notification_field);