摘要：極力推薦文章歡迎收藏干貨分享閱讀五分鐘，每日十點，和您一起終身學習，這里是程序員本篇文章主要介紹開發中的部分知識點，通過閱讀本篇文章，您將收獲以下內容自定義類實現自定義布局自定義素材使用自定義自定義常用于中，主要控制開關的開啟與關閉。

極力推薦文章：歡迎收藏
Android 干貨分享

閱讀五分鐘，每日十點，和您一起終身學習，這里是程序員Android

本篇文章主要介紹 Android 開發中的部分知識點，通過閱讀本篇文章，您將收獲以下內容:

自定義View類實現
自定義View 布局
自定義View 素材
Activity使用自定義View

自定義ItemToggleView 常用于Settings中，主要控制開關的開啟與關閉。

自定義ItemToggleView實現效果如下：

public class SwitchControlView extends View implements OnTouchListener {
    private Bitmap bg_on, bg_off, slipper_btn;
    private float downX, nowX;

    private boolean onSlip = false;

    private boolean nowStatus = false;

    private OnChangedListener listener;

    public SwitchControlView(Context context) {
        super(context);
        init();
    }

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

    public void init() {
        bg_on = BitmapFactory.decodeResource(getResources(), R.drawable.on_btn);
        bg_off = BitmapFactory.decodeResource(getResources(),
                R.drawable.off_btn);
        slipper_btn = BitmapFactory.decodeResource(getResources(),
                R.drawable.white_btn);
        setOnTouchListener(this);
    }

    protected void onDraw(Canvas canvas) {
        super.onDraw(canvas);
        Matrix matrix = new Matrix();
        Paint paint = new Paint();
        float x = 0;
        if (bg_on != null && bg_off != null) {
            if (nowX < (bg_on.getWidth() / 2)) {
                canvas.drawBitmap(bg_off, matrix, paint);
            } else {
                canvas.drawBitmap(bg_on, matrix, paint);
            }
        }

        if (onSlip) {
            if (nowX >= bg_on.getWidth())
                x = bg_on.getWidth() - slipper_btn.getWidth() / 2;
            else
                x = nowX - slipper_btn.getWidth() / 2;
        } else {
            if (nowStatus) {
                x = bg_on.getWidth() - slipper_btn.getWidth();
            } else {
                x = 0;
            }
        }

        if (x < 0) {
            x = 0;
        } else if (x > bg_on.getWidth() - slipper_btn.getWidth()) {
            x = bg_on.getWidth() - slipper_btn.getWidth();
        }

        canvas.drawBitmap(slipper_btn, x, 0, paint);
    }

    @Override
    public boolean onTouch(View v, MotionEvent event) {
        switch (event.getAction()) {
        case MotionEvent.ACTION_DOWN: {
            if (event.getX() > bg_off.getWidth()
                    || event.getY() > bg_off.getHeight()) {
                return false;
            } else {
                onSlip = true;
                downX = event.getX();
                nowX = downX;
            }
            break;
        }
        case MotionEvent.ACTION_MOVE: {
            nowX = event.getX();
            break;
        }
        case MotionEvent.ACTION_UP: {
            onSlip = false;
            if (event.getX() >= (bg_on.getWidth() / 2)) {
                nowStatus = true;
                nowX = bg_on.getWidth() - slipper_btn.getWidth();
            } else {
                nowStatus = false;
                nowX = 0;
            }

            if (listener != null) {
                listener.OnChanged(SwitchControlView.this, nowStatus);
            }
            break;
        }
        }
        invalidate();
        return true;
    }

    public void setOnChangedListener(OnChangedListener listener) {
        this.listener = listener;
    }

    public void setChecked(boolean checked) {
        if (checked) {
            nowX = bg_off.getWidth();
        } else {
            nowX = 0;
        }
        nowStatus = checked;
    }

    public interface OnChangedListener {
        public void OnChanged(SwitchControlView wiperSwitch, boolean checkState);
    }

}

        /**
     * InitSwitchView 自定義滑動開關實現
     */
    private void InitSwitchView() {
        // TODO Auto-generated method stub
        SwitchControlView wiperSwitch = (SwitchControlView) findViewById(R.id.switch_control_view);
        wiperSwitch.setChecked(true);
        wiperSwitch.setOnChangedListener(new OnChangedListener() {

            @Override
            public void OnChanged(SwitchControlView wiperSwitch,
                    boolean checkState) {
                // TODO Auto-generated method stub

                if (checkState) {
                    Toast.makeText(CustomViewMethods.this, "開啟", 1).show();

                } else {
                    Toast.makeText(CustomViewMethods.this, "關閉", 1).show();
                }
            }
        });
    }

至此，本篇已結束，如有不對的地方，歡迎您的建議與指正。同時期待您的關注，感謝您的閱讀，謝謝！