android Buton使用
16lz
2021-01-23
本文介绍 android 中 button的 OnClickListener,OnTouchListener 事件。
运行结果截图：
1. activity_main.xml
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"android:orientation="vertical"android:layout_width="match_parent"android:layout_height="match_parent"><Buttonandroid:id="@+id/commonbutton"android:layout_width="wrap_content"android:layout_height="wrap_content"android:text="我的按钮一" /><Buttonandroid:id="@+id/imagebutton"android:layout_width="wrap_content"android:layout_height="wrap_content"android:background="@drawable/button1"android:gravity="center"android:text="按钮" /></LinearLayout>
2. MainActvity.java
package com.android.button1;import android.os.Bundle;import android.annotation.SuppressLint;import android.app.Activity;import android.view.Gravity;import android.view.KeyEvent;import android.view.Menu;import android.view.MotionEvent;import android.view.View;import android.view.View.OnClickListener;import android.view.View.OnFocusChangeListener;import android.view.View.OnKeyListener;import android.view.View.OnTouchListener;import android.widget.Button;import android.widget.Toast;@SuppressLint("ShowToast")public class MainActivity extends Activity implements OnClickListener,OnTouchListener {private int value = 1; // 用于改变按钮的大小private Button commonButton;private Button imageButton;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);commonButton = (Button) this.findViewById(R.id.commonbutton);imageButton = (Button) this.findViewById(R.id.imagebutton);commonButton.setOnClickListener(this);imageButton.setOnClickListener(this);imageButton.setOnTouchListener(this);}@Overridepublic void onClick(View v) {// TODO Auto-generated method stubButton button = (Button) v;if (value == 1&& button.getWidth() == getWindowManager().getDefaultDisplay().getWidth()) {value = -1;} else if (value == -1 && button.getWidth() < 100) {value = 1;}button.setWidth(button.getWidth() + (int) (button.getWidth() * 0.1)* value);button.setHeight(button.getHeight() + (int) (button.getWidth() * 0.1)* value);}@Overridepublic boolean onTouch(View v, MotionEvent event) {// TODO Auto-generated method stubif (event.getAction() == MotionEvent.ACTION_UP) {imageButton.setBackgroundResource(R.drawable.button2);} else if (event.getAction() == MotionEvent.ACTION_DOWN) {imageButton.setBackgroundResource(R.drawable.button3);}return false;}}
工程目录截图：
