的Android - 添加布局到現有的佈局編程每次按下按鈕

Question

我建立一個應用程序，在那裏我有一個加號按鈕，每個按鈕被點擊文本框用新的佈局裏面添加的時間。

Answer 1

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" 
xmlns:tools="http://schemas.android.com/tools" 
android:layout_width="match_parent" 
android:layout_height="match_parent" > 
<LinearLayout 
    android:layout_width="match_parent" 
    android:layout_height="wrap_content" 
    android:orientation="vertical" > 

    <LinearLayout 
     android:id="@+id/ln" 
     android:layout_width="match_parent" 
     android:layout_height="wrap_content" 
     android:orientation="vertical" > 
    </LinearLayout> 

    <Button 
     android:id="@+id/button2" 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:layout_marginLeft="10dip" 
     android:gravity="left" 
     android:onClick="addAddbutton" 
     android:text="add" 
     android:visibility="visible" /> 
</LinearLayout> 
</RelativeLayout> 


mainActivity.java 

package com.example.textboxonclick; 

import android.app.Activity; 
import android.os.Bundle; 
import android.view.View; 
import android.widget.EditText; 
import android.widget.LinearLayout; 

public class MainActivity extends Activity { 

private LinearLayout ln; 
private EditText myEditText; 

@Override 
protected void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.activity_main); 
    ln = (LinearLayout) findViewById(R.id.ln); 

} 
public void addAddbutton(View v) { 
    myEditText = new EditText(this); 
    ln.addView(myEditText); 
} 
}