Android(安卓)自定义View绘制电池图标

/** * @anthor GrainRain * @funcation 自定义View绘制电池 * @date 2019/8/27 */public class DrawBatteryView extends View{    private Paint batteryPaint = new Paint();    //电池画笔    private Paint electricQuantityRedPaint = new Paint();     //红色电量画笔    private Paint electricQuantityGreenPaint = new Paint();     //绿色电量画笔    private int StrokeWidth = 10;               //笔画宽度    private int ElectricQuantity = 0;          //电量    //电池尺寸    private int left = 0;    private int top = 0;    private int right = 60;    private int bottom = 25;    public DrawBatteryView(Context context) {        super(context);    }    public DrawBatteryView(Context context, @Nullable AttributeSet attrs) {        super(context, attrs);    }    public DrawBatteryView(Context context, @Nullable AttributeSet attrs, int defStyleAttr) {        super(context, attrs, defStyleAttr);    }    //外部调用的接口 设置电池尺寸    public void setBatterySize(int size){        this.right = right + (int)(size * 1.5);        this.bottom = bottom + (int)(size * 0.625);        //更新调用onDraw重新绘制        invalidate();    }    //外部调用的接口 设置电量 0-100    public void setElectricQuantity(int electric){        if(electric >= 0 && electric <= 100) {            this.ElectricQuantity = electric;        } else if(electric < 0) {            this.ElectricQuantity = 0;        } else if(electric > 100) {            this.ElectricQuantity = 100;        }        //更新调用onDraw重新绘制        invalidate();    }    @SuppressLint({"ResourceAsColor", "DrawAllocation"})    @Override    protected void onDraw(Canvas canvas) {        super.onDraw(canvas);        batteryPaint.setColor(Color.GRAY);//        batteryPaint.setStyle(Paint.Style.STROKE);   //设置空心        batteryPaint.setStrokeWidth(StrokeWidth);        electricQuantityRedPaint.setColor(Color.RED);        electricQuantityRedPaint.setStrokeWidth(StrokeWidth);        electricQuantityGreenPaint.setColor(Color.GREEN);        electricQuantityGreenPaint.setStrokeWidth(StrokeWidth);        //电池头部位置        int BatteryHeadLeft = right;        int BatteryHeadTop = top+(bottom-top)/4;        int BatteryHeadRight = right+((right-left)/15);        int BatteryHeadBottom = top+((bottom-top)/4*3);        //电量位置        int ElectricQuantityLeft = left+2;        int ElectricQuantityTop = top+2;        int ElectricQuantityRight = (int)(((right-left)/100.0f)*ElectricQuantity)-2;        int ElectricQuantityBottom = bottom-2;        //电量为0时绘制感叹号        int ExclamationMarkHeadLeft = (int)(((right-left)/100.0f)*10);        int ExclamationMarkHeadTop = top+(bottom-top)/4;        int ExclamationMarkHeadRight = (int)(((right-left)/100.0f)*20);        int ExclamationMarkHeadBottom = top+((bottom-top)/4*3);        int ExclamationMarkBodyLeft = (int)(((right-left)/100.0f)*30);        int ExclamationMarkBodyTop = top+(bottom-top)/4;        int ExclamationMarkBodyRight = (int)(((right-left)/100.0f)*85);        int ExclamationMarkBodyBottom = top+((bottom-top)/4*3);        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {            canvas.drawRoundRect(left, top, right, bottom,0,0, batteryPaint);            canvas.drawRoundRect(BatteryHeadLeft, BatteryHeadTop, BatteryHeadRight, BatteryHeadBottom,0,0, batteryPaint);            //电量小于20的话使用红色画笔 否则使用绿色画笔            if(ElectricQuantity > 0 && ElectricQuantity < 20) {                canvas.drawRoundRect(ElectricQuantityLeft, ElectricQuantityTop, ElectricQuantityRight, ElectricQuantityBottom,0,0, electricQuantityRedPaint);            } else if(ElectricQuantity >= 20) {                canvas.drawRoundRect(ElectricQuantityLeft, ElectricQuantityTop, ElectricQuantityRight, ElectricQuantityBottom,0,0, electricQuantityGreenPaint);            } else if(ElectricQuantity == 0) {                canvas.drawRoundRect(ExclamationMarkHeadLeft, ExclamationMarkHeadTop, ExclamationMarkHeadRight, ExclamationMarkHeadBottom,0,0, electricQuantityRedPaint);                canvas.drawRoundRect(ExclamationMarkHeadLeft, ExclamationMarkHeadTop, ExclamationMarkHeadRight, ExclamationMarkHeadBottom,0,0, electricQuantityRedPaint);            }        } else {            canvas.drawRoundRect(new RectF(left, top, right, bottom), 0, 0, batteryPaint);            canvas.drawRoundRect(new RectF(BatteryHeadLeft, BatteryHeadTop, BatteryHeadRight, BatteryHeadBottom), 0, 0, batteryPaint);            //电量小于20的话使用红色画笔 否则使用绿色画笔            if(ElectricQuantity > 0 && ElectricQuantity < 20) {                canvas.drawRoundRect(new RectF(ElectricQuantityLeft, ElectricQuantityTop, ElectricQuantityRight, ElectricQuantityBottom), 0, 0, electricQuantityRedPaint);            } else if(ElectricQuantity >= 20) {                canvas.drawRoundRect(new RectF(ElectricQuantityLeft, ElectricQuantityTop, ElectricQuantityRight, ElectricQuantityBottom), 0, 0, electricQuantityGreenPaint);            } else if(ElectricQuantity == 0) {                canvas.drawRoundRect(new RectF(ExclamationMarkHeadLeft, ExclamationMarkHeadTop, ExclamationMarkHeadRight, ExclamationMarkHeadBottom), 0, 0, electricQuantityRedPaint);                canvas.drawRoundRect(new RectF(ExclamationMarkBodyLeft, ExclamationMarkBodyTop, ExclamationMarkBodyRight, ExclamationMarkBodyBottom), 0, 0, electricQuantityRedPaint);            }        }    }}

使用

DrawBatteryView batteryView = findViewById(R.id.battery_view);//设置电池图标尺寸batteryView.setBatterySize(50);//设置电池电量batteryView.setElectricQuantity(50);

使用

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