Android 개발 진급 사용자 정의 컨트롤 의 미끄럼 스위치 실현 방법【데모 소스 다운로드 첨부】

<RelativeLayout
 xmlns:android="http://schemas.android.com/apk/res/android"
 xmlns:hss="http://schemas.android.com/apk/res/com.hss.toggle"
 android:layout_width="match_parent"
 android:layout_height="match_parent"
 >
 <com.hss.toggle.ToggleView
 android:id="@+id/toggleView"
 android:layout_height="wrap_content"
 android:layout_width="wrap_content"
 android:layout_centerInParent="true"
 hss:switchBackground="@drawable/switch_background"
 hss:slidingBackground="@drawable/slide_button_background"
 hss:toggleState="true"
 >
 </com.hss.toggle.ToggleView>
</RelativeLayout>

xmlns:hss="http://schemas.android.com/apk/res/com.hss.toggle"

String namespace = "http://schemas.android.com/apk/res/com.hss.toggle";
int toggle_switchbackground = attrs.getAttributeResourceValue(namespace, "switchBackground", -1);
int toggle_slidingbackground = attrs.getAttributeResourceValue(namespace, "slidingBackground", -1);
toggle_state = attrs.getAttributeBooleanValue(namespace, "toggleState", false);

package com.hss.toggle;
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
import android.util.AttributeSet;
import android.util.Log;
import android.view.MotionEvent;
import android.view.View;
/**
 *        
 * @author hss
 */
public class ToggleView extends View {
 private static final String TAG = "ToogleView";
 private Bitmap sliding_background;
 private Bitmap switch_background;
 private boolean isSliding = false;
 private boolean toggle_state = false;
 private int downX;
 private mToggleStateChangeListener;
 //     ， xml       ，   style     
 public ToggleView(Context context, AttributeSet attrs, int defStyle) {
 super(context, attrs, defStyle);
 }
 //     ， xml        ，    style     
 public ToggleView(Context context, AttributeSet attrs) {
 this(context, attrs, 0);
 // Java       xml          
 String namespace = "http://schemas.android.com/apk/res/com.hss.toggle";
 int toggle_switchbackground = attrs.getAttributeResourceValue(namespace, "switchBackground", -1);
 int toggle_slidingbackground = attrs.getAttributeResourceValue(namespace, "slidingBackground", -1);
 toggle_state = attrs.getAttributeBooleanValue(namespace, "toggleState", false);
 Log.i(TAG,""+toggle_slidingbackground+" "+toggle_switchbackground);
 //           
 setToggleSwitchBackground(toggle_switchbackground);
 setToggleSlidingBackground(toggle_slidingbackground);
 setToggleState(toggle_state);
 }
 //          new     
 public ToggleView(Context context) {
 this(context, null);
 }
 /**
 *             
 *
 * @param toggle_slidingbackground   ID
 */
 private void setToggleSlidingBackground(int toggle_slidingbackground) {
 sliding_background = BitmapFactory.decodeResource(getResources(),toggle_slidingbackground);
 }
 /**
 *       ，      
 *
 * @param toggle_switchbackground   ID
 */
 private void setToggleSwitchBackground(int toggle_switchbackground) {
 switch_background = BitmapFactory.decodeResource(getResources(),toggle_switchbackground);
 }
 @Override
 protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
 //       ，               
 setMeasuredDimension(switch_background.getWidth(),switch_background.getHeight());
 }
 @Override
 protected void onDraw(Canvas canvas) {
 //        ，  canvas           
 canvas.drawBitmap(switch_background, 0, 0, null);
 if (isSliding) {
 //       
  //            ：（                  x   ）-（       x   ）
  int left = downX - sliding_background.getWidth() / 2;
  //         （         ）  ：（       ）-（       ）
  int rightAlign = switch_background.getWidth()- sliding_background.getWidth();
  //           0，，           
  if (left < 0) {
  left = 0;
  } else if (left > rightAlign) {
  //         》           ，          
  left = rightAlign;
  }
  //                   
  canvas.drawBitmap(sliding_background, left, 0, null);
 } else {
  //     ，              ，       
  if (toggle_state) {
  //        ，        
  int left = switch_background.getWidth() - sliding_background.getWidth();
  canvas.drawBitmap(sliding_background, left, 0, null);
  } else {
  //        ，        
  canvas.drawBitmap(sliding_background, 0, 0, null);
  }
 }
 super.onDraw(canvas);
 }
 @Override
 public boolean onTouchEvent(MotionEvent event) {
 //      
 int action = event.getAction();
 switch (action) {
 case MotionEvent.ACTION_DOWN:
  //       ，       ，          
  isSliding = true;
  downX = (int) event.getX();
  break;
 case MotionEvent.ACTION_MOVE:
  downX = (int) event.getX();
  break;
 case MotionEvent.ACTION_UP:
  //                ，      x    
  downX = (int) event.getX();
  isSliding = false;
  //             
  int center = switch_background.getWidth() / 2;
  boolean state = downX > center;
  //          ，            ，         
  if (toggle_state != state) {
  toggle_state = state;
  if (null != mToggleStateChangeListener) {
   mToggleStateChangeListener
    .onToggleState(toggle_state);
  }
  }
  break;
 }
 //    onDraw()  
 invalidate();
 return true;
 }
 //               
 public void setOnToggleStateLinstener(OnToggleStateChangeListener listen){
 mToggleStateChangeListener = listen;
 }
 public void setToggleState(boolean b) {
 toggle_state = b;
 }
 //      ，           
 public interface OnToggleStateChangeListener {
 public void onToggleState(boolean state);
 }
}

package com.hss.toggle;
import android.app.Activity;
import android.os.Bundle;
import com.hss.toggle.ToggleView.OnToggleStateChangeListener;
import com.hss.toggle.utils.ToastUtil;
public class MainActivity extends Activity{
 private ToggleView toggleView;
 @Override
 protected void onCreate(Bundle savedInstanceState) {
 // TODO Auto-generated method stub
 super.onCreate(savedInstanceState);
 setContentView(R.layout.activity_main);
 toggleView = (ToggleView) findViewById(R.id.toggleView);
 toggleView.setOnToggleStateLinstener(new OnToggleStateChangeListener() {
  @Override
  public void onToggleState(boolean state) {
  showToast(state);
  }
 });
 }
 //                Toast    
 private void showToast(boolean state) {
 ToastUtil.makeSuddenlyToast(getApplicationContext(), state?" ":" ");
 }
}

package com.hss.toggle.utils;
import android.content.Context;
import android.widget.Toast;
/**
 * @title Toast   
 * @author hss
 */
public class ToastUtil {
 private static Toast toast;
 /**
 *      Toast
 * @param context      
 * @param text       
 */
 public static void makeShortToast(Context context,String text){
 toast = Toast.makeText(context, text, Toast.LENGTH_SHORT);
 toast.show();
 }
 /**
 *       Toast
 * @param context      
 * @param text       
 */
 public static void makeLongToast(Context context,String text){
 toast = Toast.makeText(context, text, Toast.LENGTH_LONG);
 toast.show();
 }
 /**
 *   Toast
 * @param context      
 * @param text       
 */
 public static void makeSuddenlyToast(Context context,String text){
 if(toast==null){
  toast = Toast.makeText(context, text, Toast.LENGTH_SHORT);
 }
 toast.setText(text);
 toast.show();
 }
}