如何给动态创建按钮的id和onclick方法 [英] How to give id and onclick method to dynamically created button

问题描述

 package in.confio.www.dynamictext; 
 
 import android.annotation.SuppressLint; 
 import android.content.Intent; 
 import android.support.v7.app.AppCompatActivity; 
 import android.os.Bundle; 
 import android.support.v7.view.menu.ListMenuPresenter; 
 import android.util.Log; 
 import android.view.View; 
 import android.view.ViewGroup; 
 import android.widget.Button; 
 import android.widget.EditText; 
 import android.widget.LinearLayout; 
 import android.widget.TextView; 
 
 import java.util.ArrayList; 
 import java.util.List; 
 
公共类MainActivity扩展AppCompatActivity {
 private LinearLayout mLayout; 
 private EditText mEditText; 
 private Button mButton; 
整数No_Buttons; 
 
 
 @Override 
 protected void onCreate（Bundle savedInstanceState）{
 super.onCreate（savedInstanceState）; 
 setContentView（R.layout.activity_main）; 
 
 mLayout =（LinearLayout）findViewById（R.id.liner）; 
 mEditText =（EditText）findViewById（R.id.editText）; 
 mButton =（Button）findViewById（R.id.button）; 
 mButton.setOnClickListener（onClick（））; 
 
 
} 
 
 
 
 
 private View.OnClickListener onClick（）{
返回新的View.OnClickListener （）{
 
 
 @SuppressLint（ResourceType）
 @Override 
 public void onClick（View v）{
 mLayout.addView（createNewButton（ 。mEditText.getText（）的toString（）））; 
 mEditText.setId（）; 
 mEditText.setOnClickListener（）; 
 
} 
}; 
} 
 
 private Button createNewButton（String text）{
 final LinearLayout.LayoutParams lparams = new LinearLayout.LayoutParams（LinearLayout.LayoutParams.WRAP_CONTENT，LinearLayout.LayoutParams.WRAP_CONTENT）; 
 final Button button = new Button（this）; 
 button.setLayoutParams（lparams）; 
 button.setText（新房间：+文字）; 
返回按钮; 
 
 
 
} 
 
 
} 

我的尝试：

<？xml version =1.0encoding =utf -8\" >？; 
< LinearLayout xmlns：android =http://schemas.android.com/apk/res/android
 xmlns：app =http://schemas.android.com/apk/res -auto
 xmlns：tools =http://schemas.android.com/tools
 android：orientation =vertical
 android：id =@ + id / liner 
 android：layout_width =fill_parent
 android：layout_height =fill_parent
 tools：context =in.confio.www.dynamictext.MainActivity> 
 
< EditText 
 android：id =@ + id / editText
 android：layout_width =fill_parent
 android：layout_height =wrap_content
 /> 
< Button 
 android：id =@ + id / button
 android：layout_width =wrap_content
 android：layout_height =wrap_content
 android： text =添加+
 /> 
 
< / LinearLayout> 

解决方案

按钮| Android开发者 [ ^ ]

package in.confio.www.dynamictext;

import android.annotation.SuppressLint;
import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.support.v7.view.menu.ListMenuPresenter;
import android.util.Log;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.EditText;
import android.widget.LinearLayout;
import android.widget.TextView;

import java.util.ArrayList;
import java.util.List;

public class MainActivity extends AppCompatActivity {
    private LinearLayout mLayout;
    private EditText mEditText;
    private Button mButton;
Integer No_Buttons;


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        mLayout = (LinearLayout) findViewById(R.id.liner);
        mEditText = (EditText) findViewById(R.id.editText);
        mButton = (Button) findViewById(R.id.button);
        mButton.setOnClickListener(onClick());


        }




    private View.OnClickListener onClick() {
        return new View.OnClickListener() {


            @SuppressLint("ResourceType")
            @Override
            public void onClick(View v) {
                mLayout.addView(createNewButton(mEditText.getText().toString()));
                mEditText.setId();
                mEditText.setOnClickListener();

            }
        };
    }

    private Button createNewButton(String text) {
        final LinearLayout.LayoutParams lparams = new LinearLayout.LayoutParams(LinearLayout.LayoutParams.WRAP_CONTENT, LinearLayout.LayoutParams.WRAP_CONTENT);
        final Button button = new Button(this);
        button.setLayoutParams(lparams);
        button.setText("New Room: " + text);
        return button;



    }


}

What I have tried:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:orientation="vertical"
    android:id="@+id/liner"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    tools:context="in.confio.www.dynamictext.MainActivity">

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

</LinearLayout>

解决方案

Button | Android Developers[^]

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