单击按钮后实现按钮置换

蔚落 2022-09-24 05:29 222阅读 0赞

<?xml version="1.0" encoding="utf-8"?>
    <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
      android:orientation="vertical"
      android:layout_width="fill_parent"
      android:layout_height="fill_parent"
      android:background="@drawable/white"
      >
      <TextView 
      android:id="@+id/myTextView"
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:text="@string/title"
      android:textColor="@drawable/black"
      >
      </TextView>
      <ImageButton
      android:id="@+id/myImageButton_1"
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:src="@drawable/p1"
      >
      </ImageButton>  
      <ImageButton
      android:id="@+id/myImageButton_2"
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:src="@drawable/p2"
      >
      </ImageButton>
    </LinearLayout>

package com.EX029;
    
    import com.EX029.R;
    
    import android.app.Activity;
    import android.os.Bundle;
    import android.view.View;
    import android.widget.Button;
    import android.widget.ImageButton;
    import android.widget.TextView;
    
    public class EX029 extends Activity
    {
      TextView myTextView;
      ImageButton myImageButton_1;
      ImageButton myImageButton_2;
    
      /** Called when the activity is first created. */
      @Override
      public void onCreate(Bundle savedInstanceState)
      {
        super.onCreate(savedInstanceState);
        /* 载入main.xml Layout */
        setContentView(R.layout.main);
    
        /* 以findViewById()取得TextView及ImageButton对象 */
        myTextView = (TextView) findViewById(R.id.myTextView);
        myImageButton_1=(ImageButton)findViewById(R.id.myImageButton_1);
        myImageButton_2=(ImageButton)findViewById(R.id.myImageButton_2);
    
        /* myImageButton_1添加OnClickListener */
        myImageButton_1.setOnClickListener(new Button.OnClickListener()
        {
          public void onClick(View v)
          {
            myTextView.setText("点击了第一个");
            /* 点击myImageButton_1时将myImageButton_1图片置换成p3图片 */
            myImageButton_1.setImageDrawable(getResources().getDrawable(
                R.drawable.p3));
            /* 点击myImageButton_1时将myImageButton_2图片置换成p2图片 */
            myImageButton_2.setImageDrawable(getResources().getDrawable(
                R.drawable.p2));
          }
        });
    
        /* myImageButton_2添加OnClickListener */
        myImageButton_2.setOnClickListener(new Button.OnClickListener()
        {
          public void onClick(View v)
          {
            myTextView.setText("点击了第二个");
            /* 点击myImageButton_2时将myImageButton_1图片置换成p1图片 */
            myImageButton_1.setImageDrawable(getResources().getDrawable(
                R.drawable.p1));
            /* 点击myImageButton_2时将myImageButton_2图片置换成p3图片 */
            myImageButton_2.setImageDrawable(getResources().getDrawable(
                R.drawable.p3));
          }
        });
      }
    }