Android:以编程方式向布局添加按钮

Question

我正在尝试获取一个添加按钮,根据按钮左侧的edittext添加另一个按钮到布局.关键是一个人列出他们家中的房间,然后当他们在每个房间输入时,会生成一个新按钮,这样他们就可以点击房间,然后开始处理下一页.

我有一个XML布局全部完成,然后我意识到我"编程"添加按钮,所以我编程重做布局,然后在开关/箱(这就是我该怎么办onclicks)的添加按钮,我试图添加视图的按钮,但它变得非常棘手.我想在edittext下面有一个滚动视图并添加按钮,当他们将所有房间添加到他们的房子时,它最终会填充整个家庭的可滚动按钮列表.有没有办法以编程方式将按钮添加到xml'd布局.我以为你可以,但我正在尝试的一切都没有用.

感谢大家的帮助,非常感谢您的任何建议.

First Edit(响应Tanuj的解决方案)

我的XML文件(不确定我们是否会使用它或只是使用java):

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

<TextView
    android:id="@+id/tvAddARoom"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="@string/tvAddARoom" />

<EditText
    android:id="@+id/etAddARoom"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:hint="@string/etAddARoom" />


<Button
    android:id="@+id/btnAddARoom"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="@string/btnAdd" />

<TextView
    android:id="@+id/tvSelectARoom"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="@string/tvSelectARoom" />

<TextView
    android:id="@+id/tvNoRooms"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="@string/tvNoRooms" />

<Button
    android:id="@+id/btnViewAll"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="@string/btnViewAll" />

 </LinearLayout>

和Java.这一点都不正确,因为在java中我创建整个布局而不是使用上面的布局.只是不确定我是否可以弥合这两者.

package com.bluej.movingbuddy;

import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup.LayoutParams;
import android.widget.Button;
import android.widget.EditText;
import android.widget.LinearLayout;
//import android.widget.ScrollView;
import android.widget.TextView;

public class EstimatorByRoom extends Activity implements OnClickListener {
String roomName;
EditText etAddARoom;
LinearLayout layout;
LinearLayout.LayoutParams layoutParam;


@Override
protected void onCreate(Bundle savedInstanceState) {
    // TODO Auto-generated method stub
    super.onCreate(savedInstanceState);
    //setContentView(R.layout.estimatorbyroom);

    LayoutParams params = 
            new LinearLayout.LayoutParams(
                    LayoutParams.FILL_PARENT,
                    LayoutParams.WRAP_CONTENT);

    //create a layout
    LinearLayout layout = new LinearLayout(this);
    layout.setOrientation(LinearLayout.VERTICAL);

    //create a text view
    TextView tvAddARoom = new TextView(this);
    tvAddARoom.setText("Add a Room");
    tvAddARoom.setLayoutParams(params);

    //create an edittext
    EditText etAddARoom = new EditText(this);
    etAddARoom.setHint("Living Room, Dining Room, etc.");
    etAddARoom.setLayoutParams(params);


    //create a button
    Button btnAddARoom = new Button(this);
    btnAddARoom.setText("Add");
    btnAddARoom.setLayoutParams(params);

    //adds the textview
    layout.addView(tvAddARoom);

    //add the edittext
    layout.addView(etAddARoom);
    //add the button
    layout.addView(btnAddARoom);

    //create the layout param for the layout
    LinearLayout.LayoutParams layoutParam = new LinearLayout.LayoutParams(
            LayoutParams.FILL_PARENT,
            LayoutParams.WRAP_CONTENT);

    this.addContentView(layout, layoutParam);
}

public void onClick(View v) {
    // TODO Auto-generated method stub
    switch (v.getId()) {

    case R.id.btnAddARoom:
        //add a room

        //this part isn't working!
        roomName = etAddARoom.getText().toString();
        Button createdButton = new Button(this);
        createdButton.setText(roomName);
        layout.addView(createdButton);
        this.addContentView(layout, layoutParam);

        //if no rooms make tvnorooms disappear

        break;
    }

}
}

Answer 1

试试这个 :

    //the layout on which you are working
    LinearLayout layout = (LinearLayout) findViewById(R.id.linear_layout_tags);

    //set the properties for button
    Button btnTag = new Button(this);
    btnTag.setLayoutParams(new LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT));
    btnTag.setText("Button");
    btnTag.setId(some_random_id);

    //add button to the layout
    layout.addView(btnTag);

Answer 2

试试这段代码:

LinearLayout l_layout = (LinearLayout) findViewById(R.id.linear_layout); 
l_layout.setOrientation(LinearLayout.VERTICAL);

Button btn1 = new Button(this);
btn1.setText("Button_text");

l_layout.addView(btn1);

btn1.setOnClickListener(new OnClickListener()
{
     @Override
     public void onClick(View v) {
           // put code on click operation
     }
}

这是一种动态创建按钮并添加到布局中的方法.

请记住,当您以编程方式创建按钮时,您只需使用此类而不是Class_name.this