可点可拖动，功能类似seekbar，由camera源码的switch修改的类

自定义的一个类，可以直接使用

 

import android.content.Context; import android.graphics.Canvas; import android.graphics.drawable.Drawable; import android.util.AttributeSet; import android.util.Log; import android.view.MotionEvent; import android.view.View; import android.view.animation.AnimationUtils; import android.widget.ImageView; /** * A widget which switchs between the {@code Camera} and the {@code VideoCamera} * activities. */ public class OthersetSeekBar extends ImageView implements View.OnTouchListener { @SuppressWarnings("unused") private static final String TAG = "Switcher"; /** A callback to be called when the user wants to switch activity. */ public interface OnSwitchListener { // Returns true if the listener agrees that the switch can be changed. public boolean onSwitchChanged(OthersetSeekBar source, boolean onOff); } private static final int ANIMATION_SPEED = 200; private static final long NO_ANIMATION = -1; private boolean mSwitch = false; private int mPosition = 0; private long mAnimationStartTime = NO_ANIMATION; private int mAnimationStartPosition; private OnSwitchListener mListener; private int mTargetPosition = 0; private boolean mMoveFlag = true; int drawableHeight = 0; int available = 0; int temp = 0; OthersetModeLayout oset; int progressIndex= 0; public OthersetSeekBar(Context context, AttributeSet attrs) { super(context, attrs); Drawable drawable = getDrawable(); drawableHeight = drawable.getIntrinsicHeight(); available = 130/*getHeight()*/ - getPaddingTop() - getPaddingBottom() - drawableHeight; Log.i("","=================== available = "+available); temp = available / 8; } /* protected void onMeasure (int widthMeasureSpec, int heightMeasureSpec) { int height = View.MeasureSpec.getSize(heightMeasureSpec); int viewHeight = height-this.getPaddingBottom()-this.getPaddingTop(); super.onMeasure(widthMeasureSpec, heightMeasureSpec); Log.i("","<<<<<<<<<height = "+height); }*/ public void setPosition(int pos){ mPosition = available*pos / 4; Log.i("","=========== mPosition = "+mPosition); tryToSetSwitch(mPosition); } public int getPosition(){ return (mTargetPosition/(temp*2)); } // Try to change the switch position. (The client can veto it.) //private void tryToSetSwitch(boolean onOff) private void tryToSetSwitch(int position) { try { if(mPosition < temp) { mTargetPosition = 0; mMoveFlag = false; mSwitch = false; } else if(mPosition < temp *2){ mTargetPosition = temp*2; mMoveFlag = true; } else if(mPosition < temp *3){ mTargetPosition = temp*2; mMoveFlag = false; } else if(mPosition < temp *4){ mTargetPosition = temp*4; mMoveFlag = true; } else if(mPosition < temp *5){ mTargetPosition = temp*4; mMoveFlag = false; }else if(mPosition < temp *6){ mTargetPosition = temp*6; mMoveFlag = true; }else if(mPosition < temp *7){ mTargetPosition = temp*6; mMoveFlag = false; // }else if(mPosition < temp *8){ // mTargetPosition = temp*8; // mMoveFlag = true; // }else if(mPosition <temp *9){ // mTargetPosition = temp*8; // mMoveFlag = false; } else { mTargetPosition = available; mMoveFlag = true; mSwitch = true; } if (mListener != null) { if (!mListener.onSwitchChanged(this, mSwitch)) { return; } } //mSwitch = onOff; } finally { startParkingAnimation(); } Log.i("","progressIndex = "+progressIndex+" getPosition = "+(mTargetPosition/(temp*2))); oset.UpdateProgerss((4-mTargetPosition/(temp*2)),progressIndex); } public void setOnSwitchListener(OnSwitchListener listener) { mListener = listener; } @Override public boolean onTouchEvent(MotionEvent event) { if (!isEnabled()) return false; final int available = getHeight() - getPaddingTop() - getPaddingBottom() - getDrawable().getIntrinsicHeight(); switch (event.getAction()) { case MotionEvent.ACTION_DOWN: mAnimationStartTime = NO_ANIMATION; setPressed(true); trackTouchEvent(event); break; case MotionEvent.ACTION_MOVE: trackTouchEvent(event); break; case MotionEvent.ACTION_UP: trackTouchEvent(event); tryToSetSwitch(mPosition); setPressed(false); break; case MotionEvent.ACTION_CANCEL: tryToSetSwitch(mPosition); setPressed(false); break; } return true; } private void startParkingAnimation() { mAnimationStartTime = AnimationUtils.currentAnimationTimeMillis(); mAnimationStartPosition = mPosition; } private void trackTouchEvent(MotionEvent event) { Drawable drawable = getDrawable(); int drawableHeight = drawable.getIntrinsicHeight(); final int height = getHeight(); final int available = height - getPaddingTop() - getPaddingBottom() - drawableHeight; int x = (int) event.getY(); mPosition = x - getPaddingTop() - drawableHeight / 2; if (mPosition < 0) mPosition = 0; if (mPosition > available) mPosition = available; invalidate(); } @Override protected void onDraw(Canvas canvas) { Drawable drawable = getDrawable(); int drawableHeight = drawable.getIntrinsicHeight(); int drawableWidth = drawable.getIntrinsicWidth(); if (drawableWidth == 0 || drawableHeight == 0) { return; // nothing to draw (empty bounds) } final int available = getHeight() - getPaddingTop() - getPaddingBottom() - drawableHeight; if (mAnimationStartTime != NO_ANIMATION) { long time = AnimationUtils.currentAnimationTimeMillis(); int deltaTime = (int) (time - mAnimationStartTime); /*mPosition = mAnimationStartPosition + ANIMATION_SPEED * (mSwitch ? deltaTime : -deltaTime) / 1000;*/ mPosition = mAnimationStartPosition + ANIMATION_SPEED * (mMoveFlag ? deltaTime : -deltaTime) / 1000; /*if (mPosition < 0) mPosition = 0; if (mPosition > available) mPosition = available;*/ if (mPosition < 0) mPosition = 0; if(mMoveFlag) { if (mPosition > mTargetPosition) mPosition = mTargetPosition; } else { if (mPosition < mTargetPosition) mPosition = mTargetPosition; } boolean done = (mPosition == mTargetPosition); if (!done) { invalidate(); } else { mAnimationStartTime = NO_ANIMATION; } } else if (!isPressed()) { //mPosition = mSwitch ? available : 0; mPosition = mTargetPosition; } int offsetTop = getPaddingTop() + mPosition; int offsetLeft = (getWidth() - drawableWidth - getPaddingLeft() - getPaddingRight()) / 2; int saveCount = canvas.getSaveCount(); canvas.save(); canvas.translate(offsetLeft, offsetTop); drawable.draw(canvas); canvas.restoreToCount(saveCount); } // Consume the touch events for the specified view. public void addTouchView(View v) { v.setOnTouchListener(this); } // This implements View.OnTouchListener so we intercept the touch events // and pass them to ourselves. public boolean onTouch(View v, MotionEvent event) { onTouchEvent(event); return true; } public void setParentActivity(OthersetModeLayout layout,int index) { progressIndex = index; oset = layout; } }

 

xml文件中定义方法：

<com.android.XXX.OthersetSeekBar
            android:id="@+id/progress"
            android:layout_width="wrap_content"
            android:layout_height="130dip"
            android:src="@drawable/seek_thumb"
            android:background="@drawable/seek_bg"
            android:layout_centerHorizontal="true"
            />

 

当需要在多个位置的值中进行拖动的时候，可用seekbar。

但若比如只有五个位置停靠，并且控件的高度比较窄时，用seekbar就比较难以点击，使用如上类即可