編輯:關於Android編程
效果圖如圖所示:
注解:此方法類 是本人在網上找的。並非本人的,拿來自己修改就直接用了
import me.imid.movablecheckbox.R; import android.content.Context; import android.content.res.Resources; import android.graphics.Bitmap; import android.graphics.BitmapFactory; import android.graphics.Canvas; import android.graphics.Color; import android.graphics.Paint; import android.graphics.PorterDuff; import android.graphics.PorterDuffXfermode; import android.graphics.RectF; import android.util.AttributeSet; import android.view.MotionEvent; import android.view.ViewConfiguration; import android.view.ViewParent; import android.widget.CheckBox; public class SwitchButton extends CheckBox { private Paint mPaint; private ViewParent mParent; private Bitmap mBottom; private Bitmap mCurBtnPic; private Bitmap mBtnPressed; private Bitmap mBtnNormal; private Bitmap mFrame; private Bitmap mMask; private RectF mSaveLayerRectF; private PorterDuffXfermode mXfermode; private float mFirstDownY; // 首次按下的Y private float mFirstDownX; // 首次按下的X private float mRealPos; // 圖片的繪制位置 private float mBtnPos; // 按鈕的位置 private float mBtnOnPos; // 開關打開的位置 private float mBtnOffPos; // 開關關閉的位置 private float mMaskWidth; private float mMaskHeight; private float mBtnWidth; private float mBtnInitPos; private int mClickTimeout; private int mTouchSlop; private final int MAX_ALPHA = 255; private int mAlpha = MAX_ALPHA; private boolean mChecked = false; private boolean mBroadcasting; private boolean mTurningOn; private PerformClick mPerformClick; private OnCheckedChangeListener mOnCheckedChangeListener; private OnCheckedChangeListener mOnCheckedChangeWidgetListener; private boolean mAnimating; private final float VELOCITY = 350; private float mVelocity; private final float EXTENDED_OFFSET_Y = 15; private float mExtendOffsetY; // Y軸方向擴大的區域,增大點擊區域 private float mAnimationPosition; private float mAnimatedVelocity; public SwitchButton(Context context, AttributeSet attrs) { this(context, attrs, android.R.attr.checkboxStyle); } public SwitchButton(Context context) { this(context, null); } public SwitchButton(Context context, AttributeSet attrs, int defStyle) { super(context, attrs, defStyle); initView(context); } private void initView(Context context) { mPaint = new Paint(); mPaint.setColor(Color.WHITE); Resources resources = context.getResources(); // get viewConfiguration mClickTimeout = ViewConfiguration.getPressedStateDuration() + ViewConfiguration.getTapTimeout(); mTouchSlop = ViewConfiguration.get(context).getScaledTouchSlop(); // get Bitmap mBottom = BitmapFactory.decodeResource(resources, R.drawable.bottom); mBtnPressed = BitmapFactory.decodeResource(resources, R.drawable.btn_pressed); mBtnNormal = BitmapFactory.decodeResource(resources, R.drawable.btn_unpressed); mFrame = BitmapFactory.decodeResource(resources, R.drawable.frame); mMask = BitmapFactory.decodeResource(resources, R.drawable.mask); mCurBtnPic = mBtnNormal; mBtnWidth = mBtnPressed.getWidth(); mMaskWidth = mMask.getWidth(); mMaskHeight = mMask.getHeight(); mBtnOffPos = mBtnWidth / 2; mBtnOnPos = mMaskWidth - mBtnWidth / 2; mBtnPos = mChecked ? mBtnOnPos : mBtnOffPos; mRealPos = getRealPos(mBtnPos); final float density = getResources().getDisplayMetrics().density; mVelocity = (int) (VELOCITY * density + 0.5f); mExtendOffsetY = (int) (EXTENDED_OFFSET_Y * density + 0.5f); mSaveLayerRectF = new RectF(0, mExtendOffsetY, mMask.getWidth(), mMask.getHeight() + mExtendOffsetY); mXfermode = new PorterDuffXfermode(PorterDuff.Mode.SRC_IN); } @Override public void setEnabled(boolean enabled) { mAlpha = enabled ? MAX_ALPHA : MAX_ALPHA / 2; super.setEnabled(enabled); } public boolean isChecked() { return mChecked; } public void toggle() { setChecked(!mChecked); } /** * 內部調用此方法設置checked狀態,此方法會延遲執行各種回調函數,保證動畫的流暢度 * * @param checked */ private void setCheckedDelayed(final boolean checked) { this.postDelayed(new Runnable() { @Override public void run() { setChecked(checked); } }, 10); } /** * * Changes the checked state of this button. * * * @param checked true to check the button, false to uncheck it */ public void setChecked(boolean checked) { if (mChecked != checked) { mChecked = checked; mBtnPos = checked ? mBtnOnPos : mBtnOffPos; mRealPos = getRealPos(mBtnPos); invalidate(); // Avoid infinite recursions if setChecked() is called from a // listener if (mBroadcasting) { return; } mBroadcasting = true; if (mOnCheckedChangeListener != null) { mOnCheckedChangeListener.onCheckedChanged(SwitchButton.this, mChecked); } if (mOnCheckedChangeWidgetListener != null) { mOnCheckedChangeWidgetListener.onCheckedChanged(SwitchButton.this, mChecked); } mBroadcasting = false; } } /** * Register a callback to be invoked when the checked state of this button * changes. * * @param listener the callback to call on checked state change */ public void setOnCheckedChangeListener(OnCheckedChangeListener listener) { mOnCheckedChangeListener = listener; } /** * Register a callback to be invoked when the checked state of this button * changes. This callback is used for internal purpose only. * * @param listener the callback to call on checked state change * @hide */ void setOnCheckedChangeWidgetListener(OnCheckedChangeListener listener) { mOnCheckedChangeWidgetListener = listener; } @Override public boolean onTouchEvent(MotionEvent event) { int action = event.getAction(); float x = event.getX(); float y = event.getY(); float deltaX = Math.abs(x - mFirstDownX); float deltaY = Math.abs(y - mFirstDownY); switch (action) { case MotionEvent.ACTION_DOWN: attemptClaimDrag(); mFirstDownX = x; mFirstDownY = y; mCurBtnPic = mBtnPressed; mBtnInitPos = mChecked ? mBtnOnPos : mBtnOffPos; break; case MotionEvent.ACTION_MOVE: float time = event.getEventTime() - event.getDownTime(); mBtnPos = mBtnInitPos + event.getX() - mFirstDownX; if (mBtnPos >= mBtnOffPos) { mBtnPos = mBtnOffPos; } if (mBtnPos <= mBtnOnPos) { mBtnPos = mBtnOnPos; } mTurningOn = mBtnPos > (mBtnOffPos - mBtnOnPos) / 2 + mBtnOnPos; mRealPos = getRealPos(mBtnPos); break; case MotionEvent.ACTION_UP: mCurBtnPic = mBtnNormal; time = event.getEventTime() - event.getDownTime(); if (deltaY < mTouchSlop && deltaX < mTouchSlop && time < mClickTimeout) { if (mPerformClick == null) { mPerformClick = new PerformClick(); } if (!post(mPerformClick)) { performClick(); } } else { startAnimation(!mTurningOn); } break; } invalidate(); return isEnabled(); } private final class PerformClick implements Runnable { public void run() { performClick(); } } @Override public boolean performClick() { startAnimation(!mChecked); return true; } /** * Tries to claim the user's drag motion, and requests disallowing any * ancestors from stealing events in the drag. */ private void attemptClaimDrag() { mParent = getParent(); if (mParent != null) { mParent.requestDisallowInterceptTouchEvent(true); } } /** * 將btnPos轉換成RealPos * * @param btnPos * @return */ private float getRealPos(float btnPos) { return btnPos - mBtnWidth / 2; } @Override protected void onDraw(Canvas canvas) { canvas.saveLayerAlpha(mSaveLayerRectF, mAlpha, Canvas.MATRIX_SAVE_FLAG | Canvas.CLIP_SAVE_FLAG | Canvas.HAS_ALPHA_LAYER_SAVE_FLAG | Canvas.FULL_COLOR_LAYER_SAVE_FLAG | Canvas.CLIP_TO_LAYER_SAVE_FLAG); // 繪制蒙板 canvas.drawBitmap(mMask, 0, mExtendOffsetY, mPaint); mPaint.setXfermode(mXfermode); // 繪制底部圖片 canvas.drawBitmap(mBottom, mRealPos, mExtendOffsetY, mPaint); mPaint.setXfermode(null); // 繪制邊框 canvas.drawBitmap(mFrame, 0, mExtendOffsetY, mPaint); // 繪制按鈕 canvas.drawBitmap(mCurBtnPic, mRealPos, mExtendOffsetY, mPaint); canvas.restore(); } @Override protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { setMeasuredDimension((int) mMaskWidth, (int) (mMaskHeight + 2 * mExtendOffsetY)); } private void startAnimation(boolean turnOn) { mAnimating = true; mAnimatedVelocity = turnOn ? -mVelocity : mVelocity; mAnimationPosition = mBtnPos; new SwitchAnimation().run(); } private void stopAnimation() { mAnimating = false; } private final class SwitchAnimation implements Runnable { @Override public void run() { if (!mAnimating) { return; } doAnimation(); FrameAnimationController.requestAnimationFrame(this); } } private void doAnimation() { mAnimationPosition += mAnimatedVelocity * FrameAnimationController.ANIMATION_FRAME_DURATION / 1000; if (mAnimationPosition <= mBtnOnPos) { stopAnimation(); mAnimationPosition = mBtnOnPos; setCheckedDelayed(true); } else if (mAnimationPosition >= mBtnOffPos) { stopAnimation(); mAnimationPosition = mBtnOffPos; setCheckedDelayed(false); } moveView(mAnimationPosition); } private void moveView(float position) { mBtnPos = position; mRealPos = getRealPos(mBtnPos); invalidate(); } } SwitchButton switchButton=new SwitchButton();
new一個這個類的對象 接下來就是自己設置屬性和監聽 實現自己所需要的方法 即可。
下面是用到的圖片:
藍牙技術在智能硬件方面有很多用武之地,今天我就為大家分享一下藍牙在Android系統下的使用方法技巧,並實現一下兩個終端間數據的傳輸。藍牙(Bluetooth)是一種短距
概述通常情況下,我們很少直接使用Drawable的實現類,大部分的情況下還是使用xml的方式進行開發。只有在程序中需要動態的修改drawable的屬性時,才需要使用具體的
這篇文章給大家帶來的是一款android的生活管家app實現。主要實現功能及其要求:1、個人收入支出的管理。主要完成收入管理、支出管理、類別管理、收入查詢、支出查詢、統計
在開發Android應用程序時,如果需要使用系統提供的服務,可以通過服務名稱調用山下文的getSystemService(String name)來獲取服務管理者,那麼該