實現(xiàn)原理： 1、自定義View，在onDraw(Canvas canvas)中，畫出2個Drawable滑動塊，2個Drawable滑動條，2個Paint（text） 2、監(jiān)聽onTouchEvent()事件，修改滑塊和滑動條的坐標(biāo)，調(diào)用invalidate()來更新界面 使用方法 1、自定義View ??SeekBarPressure.class package xxxxxxxxximport android.content.Context; import android.content.res.Resources; import android.graphics.Canvas; import android.graphics.Color; import android.graphics.Paint; import android.graphics.drawable.Drawable; import android.util.AttributeSet; import android.view.MotionEvent; import android.view.View; import java.math.BigDecimal; import com.zjcpo.mobileapp.R;public class SeekBarPressure extends View {private static final String TAG = "SeekBarPressure";private static final int CLICK_ON_LOW = 1; //點擊在前滑塊上private static final int CLICK_ON_HIGH = 2; //點擊在后滑塊上private static final int CLICK_IN_LOW_AREA = 3;private static final int CLICK_IN_HIGH_AREA = 4;private static final int CLICK_OUT_AREA = 5;private static final int CLICK_INVAILD = 0;/** private static final int[] PRESSED_STATE_SET = {* android.R.attr.state_focused, android.R.attr.state_pressed,* android.R.attr.state_selected, android.R.attr.state_window_focused, };*/private static final int[] STATE_NORMAL = {};private static final int[] STATE_PRESSED = {android.R.attr.state_pressed, android.R.attr.state_window_focused,};private Drawable hasScrollBarBg; //滑動條滑動后背景圖private Drawable notScrollBarBg; //滑動條未滑動背景圖private Drawable mThumbLow; //前滑塊private Drawable mThumbHigh; //后滑塊private int mScollBarWidth; //控件寬度=滑動條寬度+滑動塊寬度private int mScollBarHeight; //滑動條高度private int mThumbWidth; //滑動塊寬度private int mThumbHeight; //滑動塊高度private double mOffsetLow = 0; //前滑塊中心坐標(biāo)private double mOffsetHigh = 0; //后滑塊中心坐標(biāo)private int mDistance = 0; //總刻度是固定距離 兩邊各去掉半個滑塊距離private int mThumbMarginTop = 30; //滑動塊頂部距離上邊框距離，也就是距離字體頂部的距離private int mFlag = CLICK_INVAILD;private OnSeekBarChangeListener mBarChangeListener;private double defaultScreenLow = 0; //默認前滑塊位置百分比private double defaultScreenHigh = 100; //默認后滑塊位置百分比private boolean isEdit = false; //輸入框是否正在輸入public SeekBarPressure(Context context) {this(context, null);}public SeekBarPressure(Context context, AttributeSet attrs) {this(context, attrs, 0);}public SeekBarPressure(Context context, AttributeSet attrs, int defStyle) {super(context, attrs, defStyle); // this.setBackgroundColor(Color.BLACK); Resources resources = getResources();notScrollBarBg = resources.getDrawable(R.drawable.seekbarpressure_bg_progress);hasScrollBarBg = resources.getDrawable(R.drawable.seekbarpressure_bg_normal);mThumbLow = resources.getDrawable(R.drawable.seekbarpressure_thumb);mThumbHigh = resources.getDrawable(R.drawable.seekbarpressure_thumb);mThumbLow.setState(STATE_NORMAL);mThumbHigh.setState(STATE_NORMAL);mScollBarWidth = notScrollBarBg.getIntrinsicWidth();mScollBarHeight = notScrollBarBg.getIntrinsicHeight();mThumbWidth = mThumbLow.getIntrinsicWidth();mThumbHeight = mThumbLow.getIntrinsicHeight();}//默認執(zhí)行，計算view的寬高,在onDraw()之前protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {int width = measureWidth(widthMeasureSpec); // int height = measureHeight(heightMeasureSpec);mScollBarWidth = width;mOffsetHigh = width - mThumbWidth / 2;mOffsetLow = mThumbWidth / 2;mDistance = width - mThumbWidth;mOffsetLow = formatDouble(defaultScreenLow / 100 * (mDistance ))+ mThumbWidth / 2;mOffsetHigh = formatDouble(defaultScreenHigh / 100 * (mDistance)) + mThumbWidth / 2;setMeasuredDimension(width, mThumbHeight + mThumbMarginTop+2);}private int measureWidth(int measureSpec) {int specMode = MeasureSpec.getMode(measureSpec);int specSize = MeasureSpec.getSize(measureSpec);//wrap_contentif (specMode == MeasureSpec.AT_MOST) {}//fill_parent或者精確值else if (specMode == MeasureSpec.EXACTLY) {}return specSize;}private int measureHeight(int measureSpec) {int specMode = MeasureSpec.getMode(measureSpec);int specSize = MeasureSpec.getSize(measureSpec);int defaultHeight = 100;//wrap_contentif (specMode == MeasureSpec.AT_MOST) {}//fill_parent或者精確值else if (specMode == MeasureSpec.EXACTLY) {defaultHeight = specSize;}return defaultHeight;}protected void onLayout(boolean changed, int l, int t, int r, int b) {super.onLayout(changed, l, t, r, b);}protected void onDraw(Canvas canvas) {super.onDraw(canvas);Paint text_Paint = new Paint();text_Paint.setTextAlign(Paint.Align.CENTER);text_Paint.setColor(Color.RED);text_Paint.setTextSize(20);int aaa = mThumbMarginTop + mThumbHeight / 2 - mScollBarHeight / 2;int bbb = aaa + mScollBarHeight;//白色，不會動notScrollBarBg.setBounds(mThumbWidth / 2, aaa, mScollBarWidth - mThumbWidth / 2, bbb);notScrollBarBg.draw(canvas);//藍色，中間部分會動hasScrollBarBg.setBounds((int)mOffsetLow, aaa, (int)mOffsetHigh, bbb);hasScrollBarBg.draw(canvas);//前滑塊mThumbLow.setBounds((int)(mOffsetLow - mThumbWidth / 2), mThumbMarginTop, (int)(mOffsetLow + mThumbWidth / 2), mThumbHeight + mThumbMarginTop);mThumbLow.draw(canvas);//后滑塊mThumbHigh.setBounds((int)(mOffsetHigh - mThumbWidth / 2), mThumbMarginTop, (int)(mOffsetHigh + mThumbWidth / 2), mThumbHeight + mThumbMarginTop);mThumbHigh.draw(canvas);double progressLow = formatDouble((mOffsetLow - mThumbWidth / 2) * 100 / mDistance);double progressHigh = formatDouble((mOffsetHigh - mThumbWidth / 2) * 100 / mDistance); // Log.d(TAG, "onDraw-->mOffsetLow: " + mOffsetLow + " mOffsetHigh: " + mOffsetHigh + " progressLow: " + progressLow + " progressHigh: " + progressHigh);canvas.drawText((int) progressLow + "", (int)mOffsetLow - 2 - 2, 15, text_Paint);canvas.drawText((int) progressHigh + "", (int)mOffsetHigh - 2, 15, text_Paint);if (mBarChangeListener != null) {if (!isEdit) {mBarChangeListener.onProgressChanged(this, progressLow, progressHigh);}}}@Overridepublic boolean onTouchEvent(MotionEvent e) {//按下if (e.getAction() == MotionEvent.ACTION_DOWN) {if (mBarChangeListener != null) {mBarChangeListener.onProgressBefore();isEdit = false;}mFlag = getAreaFlag(e); // Log.d(TAG, "e.getX: " + e.getX() + "mFlag: " + mFlag); // Log.d("ACTION_DOWN", "------------------");if (mFlag == CLICK_ON_LOW) {mThumbLow.setState(STATE_PRESSED);} else if (mFlag == CLICK_ON_HIGH) {mThumbHigh.setState(STATE_PRESSED);} else if (mFlag == CLICK_IN_LOW_AREA) {mThumbLow.setState(STATE_PRESSED);//如果點擊0-mThumbWidth/2坐標(biāo)if (e.getX() < 0 || e.getX() <= mThumbWidth/2) {mOffsetLow = mThumbWidth/2;} else if (e.getX() > mScollBarWidth - mThumbWidth/2) { // mOffsetLow = mDistance - mDuration;mOffsetLow = mThumbWidth/2 + mDistance;} else {mOffsetLow = formatDouble(e.getX()); // if (mOffsetHigh<= mOffsetLow) { // mOffsetHigh = (mOffsetLow + mDuration <= mDistance) ? (mOffsetLow + mDuration) // : mDistance; // mOffsetLow = mOffsetHigh - mDuration; // } }} else if (mFlag == CLICK_IN_HIGH_AREA) {mThumbHigh.setState(STATE_PRESSED); // if (e.getX() < mDuration) { // mOffsetHigh = mDuration; // mOffsetLow = mOffsetHigh - mDuration; // } else if (e.getX() >= mScollBarWidth - mThumbWidth/2) { // mOffsetHigh = mDistance + mThumbWidth/2;if(e.getX() >= mScollBarWidth - mThumbWidth/2) {mOffsetHigh = mDistance + mThumbWidth/2;} else {mOffsetHigh = formatDouble(e.getX()); // if (mOffsetHigh <= mOffsetLow) { // mOffsetLow = (mOffsetHigh - mDuration >= 0) ? (mOffsetHigh - mDuration) : 0; // mOffsetHigh = mOffsetLow + mDuration; // } }}//設(shè)置進度條 refresh();//移動move} else if (e.getAction() == MotionEvent.ACTION_MOVE) { // Log.d("ACTION_MOVE", "------------------");if (mFlag == CLICK_ON_LOW) {if (e.getX() < 0 || e.getX() <= mThumbWidth/2) {mOffsetLow = mThumbWidth/2;} else if (e.getX() >= mScollBarWidth - mThumbWidth/2) {mOffsetLow = mThumbWidth/2 + mDistance;mOffsetHigh = mOffsetLow;} else {mOffsetLow = formatDouble(e.getX());if (mOffsetHigh - mOffsetLow <= 0) {mOffsetHigh = (mOffsetLow <= mDistance+mThumbWidth/2) ? (mOffsetLow) : (mDistance+mThumbWidth/2);}}} else if (mFlag == CLICK_ON_HIGH) {if (e.getX() < mThumbWidth/2) {mOffsetHigh = mThumbWidth/2;mOffsetLow = mThumbWidth/2;} else if (e.getX() > mScollBarWidth - mThumbWidth/2) {mOffsetHigh = mThumbWidth/2 + mDistance;} else {mOffsetHigh = formatDouble(e.getX());if (mOffsetHigh - mOffsetLow <= 0) {mOffsetLow = (mOffsetHigh >= mThumbWidth/2) ? (mOffsetHigh) : mThumbWidth/2;}}}//設(shè)置進度條 refresh();//抬起} else if (e.getAction() == MotionEvent.ACTION_UP) { // Log.d("ACTION_UP", "------------------"); mThumbLow.setState(STATE_NORMAL);mThumbHigh.setState(STATE_NORMAL);if (mBarChangeListener != null) {mBarChangeListener.onProgressAfter();}//這兩個for循環(huán) 是用來自動對齊刻度的，注釋后，就可以自由滑動到任意位置 // for (int i = 0; i < money.length; i++) { // if(Math.abs(mOffsetLow-i* ((mScollBarWidth-mThumbWidth)/ (money.length-1)))<=(mScollBarWidth-mThumbWidth)/(money.length-1)/2){ // mprogressLow=i; // mOffsetLow =i* ((mScollBarWidth-mThumbWidth)/(money.length-1)); // invalidate(); // break; // } // } // // for (int i = 0; i < money.length; i++) { // if(Math.abs(mOffsetHigh-i* ((mScollBarWidth-mThumbWidth)/(money.length-1) ))<(mScollBarWidth-mThumbWidth)/(money.length-1)/2){ // mprogressHigh=i; // mOffsetHigh =i* ((mScollBarWidth-mThumbWidth)/(money.length-1)); // invalidate(); // break; // } // } }return true;}public int getAreaFlag(MotionEvent e) {int top = mThumbMarginTop;int bottom = mThumbHeight + mThumbMarginTop;if (e.getY() >= top && e.getY() <= bottom && e.getX() >= (mOffsetLow - mThumbWidth / 2) && e.getX() <= mOffsetLow + mThumbWidth / 2) {return CLICK_ON_LOW;} else if (e.getY() >= top && e.getY() <= bottom && e.getX() >= (mOffsetHigh - mThumbWidth / 2) && e.getX() <= (mOffsetHigh + mThumbWidth / 2)) {return CLICK_ON_HIGH;} else if (e.getY() >= top&& e.getY() <= bottom&& ((e.getX() >= 0 && e.getX() < (mOffsetLow - mThumbWidth / 2)) || ((e.getX() > (mOffsetLow + mThumbWidth / 2))&& e.getX() <= ((double) mOffsetHigh + mOffsetLow) / 2))) {return CLICK_IN_LOW_AREA;} else if (e.getY() >= top&& e.getY() <= bottom&& (((e.getX() > ((double) mOffsetHigh + mOffsetLow) / 2) && e.getX() < (mOffsetHigh - mThumbWidth / 2)) || (e.getX() > (mOffsetHigh + mThumbWidth/2) && e.getX() <= mScollBarWidth))) {return CLICK_IN_HIGH_AREA;} else if (!(e.getX() >= 0 && e.getX() <= mScollBarWidth && e.getY() >= top && e.getY() <= bottom)) {return CLICK_OUT_AREA;} else {return CLICK_INVAILD;}}//更新滑塊private void refresh() {invalidate();}//設(shè)置前滑塊的值 public void setProgressLow(double progressLow) {this.defaultScreenLow = progressLow;mOffsetLow = formatDouble(progressLow / 100 * (mDistance ))+ mThumbWidth / 2;isEdit = true;refresh();}//設(shè)置后滑塊的值public void setProgressHigh(double progressHigh) {this.defaultScreenHigh = progressHigh;mOffsetHigh = formatDouble(progressHigh / 100 * (mDistance)) + mThumbWidth / 2;isEdit = true;refresh();}public void setOnSeekBarChangeListener(OnSeekBarChangeListener mListener) {this.mBarChangeListener = mListener;}//回調(diào)函數(shù)，在滑動時實時調(diào)用，改變輸入框的值public interface OnSeekBarChangeListener {//滑動前public void onProgressBefore();//滑動時public void onProgressChanged(SeekBarPressure seekBar, double progressLow,double progressHigh);//滑動后public void onProgressAfter();}/* private int formatInt(double value) {BigDecimal bd = new BigDecimal(value);BigDecimal bd1 = bd.setScale(0, BigDecimal.ROUND_HALF_UP);return bd1.intValue();}*/public static double formatDouble(double pDouble) {BigDecimal bd = new BigDecimal(pDouble);BigDecimal bd1 = bd.setScale(2, BigDecimal.ROUND_HALF_UP);pDouble = bd1.doubleValue();return pDouble;}}

2、布局調(diào)用 xxx.xml

<com.xxx.SeekBarPressureandroid:id="@+id/seekBar_tg2"android:layout_width="match_parent"android:layout_height="wrap_content"android:layout_alignParentTop="true"android:layout_marginBottom="10dp"android:layout_marginLeft="10dp"android:layout_marginRight="10dp" />

3、在Activity中實現(xiàn)XxxActivity.class

seekBarPressures = (SeekBarPressure) findViewById(R.id.seekBar_tg2);seekBarPressures.setOnSeekBarChangeListener(new SeekBarPressure.OnSeekBarChangeListener() {@Overridepublic void onProgressBefore() {isScreen = true;}@Overridepublic void onProgressChanged(SeekBarPressure seekBar, double progressLow, double progressHigh) {editTexts_min.setText((int) progressLow + "");editTexts_max.setText((int) progressHigh + "");}@Overridepublic void onProgressAfter() {isScreen = false;}});

注意：seekBar的父容器必須LinearLayout，別問我為什么，我也不知道。反正如果是Rinearlayout的話，滑動會不正常，我曹了，為這問題搞了整整3個小時

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