Question

我设计了如下图所示的布局：

在EditText中输入文字后，当我按添加+ Button时，TextView和Button将会添加，如下所示图片如下：

我想在Button的右侧显示TextView。我该怎么做？另一个问题是，当用户点击按钮时，如何删除相应的View？代码：

 public class ExampleActivity extends Activity {
    private LinearLayout mLayout;
    private EditText mEditText;
    private Button mButton;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        mLayout = (LinearLayout) findViewById(R.id.linearLayout);
        mEditText = (EditText) findViewById(R.id.editText);
        mButton = (Button) findViewById(R.id.button);
        mButton.setOnClickListener(new OnClickListener() {

            public void onClick(View v) {
                mLayout.addView(createNewTextView(mEditText.getText()
                        .toString()));
                mLayout.addView(createNewButton());
            }
        });

    }

    private TextView createNewTextView(String text) {
        final LayoutParams lparams = new LayoutParams(
                LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);
        final TextView textView = new TextView(this);
        textView.setLayoutParams(lparams);
        textView.setText("New text: " + text);
        return textView;
    }

    private Button createNewButton() {
        final LayoutParams lparams = new LayoutParams(
                LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);
        final Button button = new Button(this);
        button.setLayoutParams(lparams);
        button.setText(" - ");
        return button;
    }
  }

Answer 1

LinearLayout具有属性Orientation以垂直/水平对齐控件所以只需设置相同的方向

http://developer.android.com/reference/android/widget/LinearLayout.html

 mLayout = (LinearLayout) findViewById(R.id.linearLayout);
 mLayout.setOrientation(LinearLayout.HORIZONTAL);

更新

<?xml version="1.0" encoding="utf-8"?> 
<LinearLayout   
        xmlns:android="schemas.android.com/apk/res/android";   
        android:layout_width="fill_parent"   
        android:layout_height="fill_parent" > 

<LinearLayout   
        android:id="@+id/linearLayout" 
        android:layout_width="fill_parent"   
        android:layout_height="wrap_content" /> 

<EditText   
        android:id="@+id/editText" 
        android:layout_width="293dp"   
        android:layout_height="wrap_content" > 
        <requestFocus /> </EditText> 

 <Button android:id="@+id/button" 
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:text="Add+" />

 </LinearLayout>

Answer 2

TextViews和Buttons已堆叠，因为您可能使用方向为LinearLayout的{{1}}。您可以将vertical + TextView打包到Button，然后将此LinearLayout添加到您自己的布局中，或者您可以使用下面的LinearLayout（我'我添加了一些ID，因此您可以删除所需的行：

TableLayout

public class SomeActivity extends Activity { private EditText mInput; private TableLayout mTable; private static int sCount = 0; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); Button addButton = (Button) findViewById(R.id.add); mInput = (EditText) findViewById(R.id.editText1); mTable = (TableLayout) findViewById(R.id.table1); addButton.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { mTable.addView(addRow(mInput.getText().toString())); } }); } private TableRow addRow(String s) { TableRow tr = new TableRow(this); tr.setId(1000 + sCount); tr.setLayoutParams(new TableLayout.LayoutParams( TableLayout.LayoutParams.FILL_PARENT, TableLayout.LayoutParams.WRAP_CONTENT)); TableRow.LayoutParams tlparams = new TableRow.LayoutParams( TableRow.LayoutParams.WRAP_CONTENT, TableRow.LayoutParams.WRAP_CONTENT); TextView textView = new TextView(this); textView.setLayoutParams(tlparams); textView.setText("New text: " + s); tr.addView(textView); TableRow.LayoutParams blparams = new TableRow.LayoutParams( TableRow.LayoutParams.WRAP_CONTENT, TableRow.LayoutParams.WRAP_CONTENT); final Button button = new Button(this); button.setLayoutParams(blparams); button.setText(" - "); button.setId(2000 + sCount); button.setOnClickListener(new OnClickListener(){ @Override public void onClick(View v) { mTable.removeView(findViewById(v.getId() - 1000)); } }); tr.addView(button); sCount++; return tr; } }布局文件为：

main

如果由于某种原因，您不希望<?xml version="1.0" encoding="utf-8"?> <ScrollView xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="wrap_content" > <LinearLayout android:id="@+id/parent" android:layout_width="match_parent" android:layout_height="wrap_content" android:orientation="vertical" > <EditText android:id="@+id/editText1" android:layout_width="match_parent" android:layout_height="wrap_content" /> <Button android:id="@+id/add" android:layout_width="match_parent" android:layout_height="wrap_content" /> <TableLayout android:id="@+id/table1" android:layout_width="match_parent" android:layout_height="wrap_content" > </TableLayout> </LinearLayout> </ScrollView>使用TableLayout将LinearLayout和TextView用上面的布局文件包裹起来（当然要删除Button）：

TableLayout

如何水平对齐一些以编程方式添加的视图？

2 个答案: