仿iphone 开关按钮

 

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 com.pubukeji.gamecenter.R;

public class MySlipSwitch extends View
  implements View.OnTouchListener
{
  private long clickTimeMillis = 0L;
  private float currentX;
  private boolean isSlipping = false;
  private boolean isSwitchOn = false;
  private Rect off_Rect;
  private OnSwitchListener onSwitchListener;
  private Rect on_Rect;
  private float previousX;
  private Bitmap slip_Btn;
  private Bitmap switch_off_Bkg;
  private Bitmap switch_on_Bkg;

  public MySlipSwitch(Context paramContext)
  {
    super(paramContext);
    init();
  }

 public MySlipSwitch(Context context, AttributeSet attrs) {
  super(context, attrs);
  init();
 }

 public MySlipSwitch(Context context, AttributeSet attrs, int defStyle) {
  super(context, attrs, defStyle);
  init();
 }
  private void init()
  {
  setImageResource(R.drawable.split_left_1, R.drawable.split_right_1,
    R.drawable.split_1);
    setOnTouchListener(this);
  }

  protected boolean getSwitchState()
  {
    return this.isSwitchOn;
  }

  public void onClick()
  {
    boolean bool;
    if (!this.isSwitchOn)
      bool = true;
    else
      bool = false;
    this.isSwitchOn = bool;
    if (this.onSwitchListener != null)
      this.onSwitchListener.onSwitched(this, this.isSwitchOn);
    invalidate();
  }

  protected void onDraw(Canvas paramCanvas)
  {
    super.onDraw(paramCanvas);
    Matrix localMatrix = new Matrix();
    Paint localPaint = new Paint();
    if (this.currentX >= this.switch_on_Bkg.getWidth() / 2)
      paramCanvas.drawBitmap(this.switch_on_Bkg, localMatrix, localPaint);
    else
      paramCanvas.drawBitmap(this.switch_off_Bkg, localMatrix, localPaint);
    float f;
    if (!this.isSlipping)
    {
      if (!this.isSwitchOn)
      {
        f = this.off_Rect.left;
        paramCanvas.drawBitmap(this.switch_off_Bkg, localMatrix, localPaint);
      }
      else
      {
        f = this.on_Rect.left;
        paramCanvas.drawBitmap(this.switch_on_Bkg, localMatrix, localPaint);
      }
    }
    else if (this.currentX <= this.switch_on_Bkg.getWidth())
      f = this.currentX - this.slip_Btn.getWidth() / 2;
    else
      f = this.switch_on_Bkg.getWidth() - this.slip_Btn.getWidth();
    if (f >= 0.0F)
    {
      if (f > this.switch_on_Bkg.getWidth() - this.slip_Btn.getWidth())
        f = this.switch_on_Bkg.getWidth() - this.slip_Btn.getWidth();
    }
    else
      f = 0.0F;
    paramCanvas.drawBitmap(this.slip_Btn, f, 0.0F, localPaint);
  }

  protected void onMeasure(int paramInt1, int paramInt2)
  {
    setMeasuredDimension(this.switch_on_Bkg.getWidth(), this.switch_on_Bkg.getHeight());
  }

  public boolean onTouch(View paramView, MotionEvent paramMotionEvent)
  {
    boolean bool1 = false;
    switch (paramMotionEvent.getAction())
    {
    case 0:
      if ((paramMotionEvent.getX() > this.switch_on_Bkg.getWidth()) || (paramMotionEvent.getY() > this.switch_on_Bkg.getHeight()))
    break;
      this.isSlipping = true;
      this.clickTimeMillis = System.currentTimeMillis();
      this.previousX = paramMotionEvent.getX();
      this.currentX = this.previousX;
      break;
    case 1:
    case 3:
      this.isSlipping = bool1;
      if (System.currentTimeMillis() - this.clickTimeMillis >= 300L)
      {
        boolean bool2 = this.isSwitchOn;
        if (paramMotionEvent.getX() < this.switch_on_Bkg.getWidth() / 2)
          this.isSwitchOn = bool1;
        else
          this.isSwitchOn = true;
        if ((this.onSwitchListener == null) || (bool2 == this.isSwitchOn))
          break;
        this.onSwitchListener.onSwitched(this, this.isSwitchOn);
      }
      else
      {
        onClick();
      }
      break;
    case 2:
      this.currentX = paramMotionEvent.getX();
    }
    invalidate();
    bool1 = true;
  return bool1;
  }

  protected void setImageResource(int paramInt1, int paramInt2, int paramInt3)
  {
    this.switch_on_Bkg = BitmapFactory.decodeResource(getResources(), paramInt1);
    this.switch_off_Bkg = BitmapFactory.decodeResource(getResources(), paramInt2);
    this.slip_Btn = BitmapFactory.decodeResource(getResources(), paramInt3);
    this.on_Rect = new Rect(this.switch_off_Bkg.getWidth() - this.slip_Btn.getWidth(), 0, this.switch_off_Bkg.getWidth(), this.slip_Btn.getHeight());
    this.off_Rect = new Rect(0, 0, this.slip_Btn.getWidth(), this.slip_Btn.getHeight());
  }

  public void setOnSwitchListener(OnSwitchListener paramOnSwitchListener)
  {
    this.onSwitchListener = paramOnSwitchListener;
  }

 public void setSwitchState(boolean paramBoolean)
  {
    this.isSwitchOn = paramBoolean;
    invalidate();
  }

  public static abstract interface OnSwitchListener
  {
    public abstract void onSwitched(MySlipSwitch paramMySlipSwitch, boolean paramBoolean);
  }
}