Question

我在xml文件中做了以下相对布局，比如add_relative_layout.xml

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



</LinearLayout>

以上是我想要添加以下代码文件副本的主要布局。

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

<RelativeLayout

    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:background="@android:color/white" >

    <TextView
        android:id="@+id/amountLabel"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_centerVertical="true"
        android:layout_marginLeft="5dp"
        android:text="Amount"
        android:textColor="@android:color/black"
        android:textStyle="bold" />

    <EditText
        android:id="@+id/amount"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentRight="true"
        android:layout_centerVertical="true"
        android:layout_marginRight="5dp" >

    </EditText>

我有另一个名为Show_all.xml的android xml文件。它是一个线性布局xml

我想在此show_all布局中将上面的相对布局添加到我想要的次数

目前我正在使用此代码

private void callOnCreate()
      {
          linear = (LinearLayout) findViewById(R.id.addAccountLinearLayout); // the layout in which i want to make dynamic copies of this layout.
          layout = (RelativeLayout) findViewById(R.layout.ui_relative_layout_style); // name of xml File of above code.

          for (int i=0; i < 4; i++)
          {
              Account account = accountArray.get(i);
              linear.addView(layout, i);
          }   
      }

我得到Null点异常。请告诉我该怎么做。

最好的问候

Answer 1

嘿你正在使用findViewById获取在当前布局show_all.xml中没有的relativelayout实例。为什么你得到空指针异常。为那个特定的relativelayout创建单独的布局并将xml布局文件命名为UIContianer然后尝试使用下面的代码

private void callOnCreate()
      {
          linear = (LinearLayout) findViewById(R.id.addAccountLinearLayout); // the layout in which i want to make dynamic copies of this layout.

 LayoutInflater inflater = (LayoutInflater)getSystemService(LAYOUT_INFLATER_SERVICE);
 View vi = inflater.inflate(R.layout.ui_relative_layout_style, null);
          for (int i=0; i < 4; i++)
          {
              Account account = accountArray.get(i);
              linear.addView(vi, i);
          }   
      }

Answer 2

Hello Umar我不知道如何使用xml布局动态添加但是你可以使用Below Code来获取你需要的东西添加到LinearLayout

public RelativeLayout createViewTOAdd(){
    lp=new RelativeLayout.LayoutParams(android.widget.RelativeLayout.LayoutParams.FILL_PARENT,android.widget.RelativeLayout.LayoutParams.WRAP_CONTENT);
    RelativeLayout mRelativeLayout=new RelativeLayout(this);
    mRelativeLayout.setBackgroundColor(Color.WHITE);
    TextView mTextView=new TextView(this);
     RelativeLayout.LayoutParams Textview_lp=new RelativeLayout.LayoutParams(android.widget.RelativeLayout.LayoutParams.WRAP_CONTENT,android.widget.RelativeLayout.LayoutParams.WRAP_CONTENT);
    mTextView.setText("Amout");
    Textview_lp.addRule(RelativeLayout.ALIGN_PARENT_LEFT);
    Textview_lp.addRule(RelativeLayout.CENTER_VERTICAL);
    Textview_lp.leftMargin=10;
    mTextView.setTextColor(Color.BLACK);
    mTextView.setTextAppearance(this, R.style.TextStyle);
    //mTextView.setLayoutParams(Textview_lp);
    EditText mEditText=new EditText(this);
     RelativeLayout.LayoutParams EditText_param=new RelativeLayout.LayoutParams(android.widget.RelativeLayout.LayoutParams.WRAP_CONTENT,android.widget.RelativeLayout.LayoutParams.WRAP_CONTENT);
     EditText_param.addRule(RelativeLayout.ALIGN_PARENT_RIGHT);
     EditText_param.addRule(RelativeLayout.CENTER_VERTICAL);
     EditText_param.rightMargin=10;
    //mEditText.setLayoutParams(EditText_param);
    //mRelativeLayout.addView(mTextView, 0);
    //mRelativeLayout.addView(mEditText, 1);
    //mRelativeLayout.addView(mTextView);
    //mRelativeLayout.addView(mEditText);
    mRelativeLayout.addView(mTextView, Textview_lp);
    mRelativeLayout.addView(mEditText, EditText_param);
    return mRelativeLayout;
}

现在如何将视图添加到LinearLayout是

    mLinearLayout=(LinearLayout)findViewById(R.id.mainLinearView);

    mLinearLayout.removeAllViews();

   for(int i=0;i<4;i++){
        mLinearLayout.addView(createViewTOAdd(), i);
    }

将自定义relativelayout添加到单个linearlayout

2 个答案: