Android(安卓)ToggleButton（自定义可滑动的ToggleButton控件）

Android API中有自带的ToggleButton控件，然而这个控件看起来并不是那么美观，所以我们可以选择自定义我们的控件来实现该效果。

实现效果：

布局文件main.xml:

<?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:background="@drawable/blue_striped_bg"    android:orientation="vertical" >    <RelativeLayout        android:id="@+id/relativeLayout1"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:layout_marginTop="15dip"        android:padding="5dip" >        <TextView             android:id="@+id/textView"            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:text="自定义可滑动ToggleButton实例介绍"            android:layout_centerHorizontal="true"/>        <Button            android:id="@+id/ringagain"            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:layout_centerHorizontal="true"            android:background="@drawable/clock_list"            android:clickable="false"            android:gravity="center_vertical"            android:padding="10dip"            android:text="开"            android:textColor="@android:color/black"            android:textSize="18sp"             android:layout_below="@id/textView"            android:layout_marginTop="10dp"            />        <com.cn.slipbutton.SlipButton            android:id="@+id/splitbutton"            android:layout_width="100dip"            android:layout_height="40dip"            android:layout_alignRight="@id/ringagain"            android:layout_alignTop="@id/ringagain"            android:layout_marginTop="10dip" />    </RelativeLayout></LinearLayout>

SlipButtonActivity:

package com.cn.slipbutton;import android.app.Activity;import android.os.Bundle;import android.widget.Button;import com.cn.slipbutton.SlipButton.OnChangedListener;public class SlipButtonActivity extends Activity {private SlipButton sb = null;private Button btn = null;@Overridepublic void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.main);/** * 初始化控件 */sb = (SlipButton) findViewById(R.id.splitbutton);btn = (Button) findViewById(R.id.ringagain);sb.setCheck(true);/** * 设置监听 */sb.SetOnChangedListener(new OnChangedListener() {public void OnChanged(boolean CheckState) {btn.setText(CheckState ? "开" : "关");}});}}

自定义ToggleButton（取名为SlipButton）：

package com.cn.slipbutton;import android.content.Context;import android.graphics.Bitmap;import android.graphics.BitmapFactory;import android.graphics.Canvas;import android.graphics.Matrix;import android.graphics.Paint;import android.graphics.Rect;import android.util.AttributeSet;import android.view.MotionEvent;import android.view.View;import android.view.View.OnTouchListener;public class SlipButton extends View implements OnTouchListener {private boolean NowChoose = false;// 记录当前按钮是否打开,true为打开,false为关闭private boolean isChecked;private boolean OnSlip = false;// 记录用户是否在滑动的变量private float DownX, NowX;// 按下时的x,当前的xprivate Rect Btn_On, Btn_Off;// 打开和关闭状态下,游标的Rect .private boolean isChgLsnOn = false;private OnChangedListener ChgLsn;private Bitmap bg_on, bg_off, slip_btn;public SlipButton(Context context) {super(context);init();}public SlipButton(Context context, AttributeSet attrs) {super(context, attrs);init();}public SlipButton(Context context, AttributeSet attrs, int defStyle) {super(context, attrs, defStyle);init();}private void init() {// 初始化bg_on = BitmapFactory.decodeResource(getResources(),R.drawable.split_left_1);bg_off = BitmapFactory.decodeResource(getResources(),R.drawable.split_right_1);slip_btn = BitmapFactory.decodeResource(getResources(),R.drawable.split_1);Btn_On = new Rect(0, 0, slip_btn.getWidth(), slip_btn.getHeight());Btn_Off = new Rect(bg_off.getWidth() - slip_btn.getWidth(), 0,bg_off.getWidth(), slip_btn.getHeight());setOnTouchListener(this);// 设置监听器,也可以直接复写OnTouchEvent}@Overrideprotected void onDraw(Canvas canvas) {// 绘图函数super.onDraw(canvas);Matrix matrix = new Matrix();Paint paint = new Paint();float x;if (NowX < (bg_on.getWidth() / 2))// 滑动到前半段与后半段的背景不同,在此做判断{x = NowX - slip_btn.getWidth() / 2;canvas.drawBitmap(bg_off, matrix, paint);// 画出关闭时的背景}else {x = bg_on.getWidth() - slip_btn.getWidth() / 2;canvas.drawBitmap(bg_on, matrix, paint);// 画出打开时的背景}if (OnSlip)// 是否是在滑动状态,{if (NowX >= bg_on.getWidth())// 是否划出指定范围,不能让游标跑到外头,必须做这个判断x = bg_on.getWidth() - slip_btn.getWidth() / 2;// 减去游标1/2的长度...else if (NowX < 0) {x = 0;} else {x = NowX - slip_btn.getWidth() / 2;}} else {// 非滑动状态if (NowChoose)// 根据现在的开关状态设置画游标的位置{x = Btn_Off.left;canvas.drawBitmap(bg_on, matrix, paint);// 初始状态为true时应该画出打开状态图片} elsex = Btn_On.left;}if (isChecked) {canvas.drawBitmap(bg_on, matrix, paint);x = Btn_Off.left;isChecked = !isChecked;}if (x < 0)// 对游标位置进行异常判断...x = 0;else if (x > bg_on.getWidth() - slip_btn.getWidth())x = bg_on.getWidth() - slip_btn.getWidth();canvas.drawBitmap(slip_btn, x, 0, paint);// 画出游标.}public boolean onTouch(View v, MotionEvent event) {switch (event.getAction())// 根据动作来执行代码{case MotionEvent.ACTION_MOVE:// 滑动NowX = event.getX();break;case MotionEvent.ACTION_DOWN:// 按下if (event.getX() > bg_on.getWidth()|| event.getY() > bg_on.getHeight())return false;OnSlip = true;DownX = event.getX();NowX = DownX;break;case MotionEvent.ACTION_CANCEL: // 移到控件外部OnSlip = false;boolean choose = NowChoose;if (NowX >= (bg_on.getWidth() / 2)) {NowX = bg_on.getWidth() - slip_btn.getWidth() / 2;NowChoose = true;} else {NowX = NowX - slip_btn.getWidth() / 2;NowChoose = false;}if (isChgLsnOn && (choose != NowChoose)) // 如果设置了监听器,就调用其方法..ChgLsn.OnChanged(NowChoose);break;case MotionEvent.ACTION_UP:// 松开OnSlip = false;boolean LastChoose = NowChoose;if (event.getX() >= (bg_on.getWidth() / 2)) {NowX = bg_on.getWidth() - slip_btn.getWidth() / 2;NowChoose = true;}else {NowX = NowX - slip_btn.getWidth() / 2;NowChoose = false;}if (isChgLsnOn && (LastChoose != NowChoose)) // 如果设置了监听器,就调用其方法..ChgLsn.OnChanged(NowChoose);break;default:}invalidate();// 重画控件return true;}public void SetOnChangedListener(OnChangedListener l) {// 设置监听器,当状态修改的时候isChgLsnOn = true;ChgLsn = l;}public interface OnChangedListener {abstract void OnChanged(boolean CheckState);}public void setCheck(boolean isChecked) {this.isChecked = isChecked;NowChoose = isChecked;}}

点击下载源码

更多相关文章

随机推荐