ExtendToast.java

/**
 * Created: chiemy
 * Date: 16/11/22
 * Description: 可控制显示时长, 可点击的Toast
 */
public class ExtendToast {
    public static final int LENGTH_ALWAYS = 0;
    public static final int LENGTH_SHORT = 2;

    private Toast toast;
    private Context mContext;
    private int mDuration = LENGTH_SHORT;
    private int animations = -1;
    private boolean isShow = false;

    private Object mTN;
    private Method show;
    private Method hide;
    private WindowManager.LayoutParams params;
    private View mView;

    private Handler handler = new Handler();

    public ExtendToast(Context context, @NonNull View contentView){
        this.mContext = context;
        if (toast == null) {
            toast = new Toast(mContext);
        }
        mView = contentView;
    }

    private Runnable hideRunnable = new Runnable() {
        @Override
        public void run() {
            hide();
        }
    };

    /**
     * Show the view for the specified duration.
     */
    public void show(){
        if (isShow) return;
        toast.setView(mView);
        initTN();
        try {
            show.invoke(mTN);
        } catch (InvocationTargetException e) {
            e.printStackTrace();
        } catch (IllegalAccessException e) {
            e.printStackTrace();
        }
        isShow = true;
        //判断duration，如果大于#LENGTH_ALWAYS 则设置消失时间
        if (mDuration > LENGTH_ALWAYS) {
            handler.postDelayed(hideRunnable, mDuration * 1000);
        }
    }

    /**
     * Close the view if it's showing, or don't show it if it isn't showing yet.
     * You do not normally have to call this.  Normally view will disappear on its own
     * after the appropriate duration.
     */
    public void hide(){
        if(!isShow) return;
        try {
            hide.invoke(mTN);
        } catch (InvocationTargetException e) {
            e.printStackTrace();
        } catch (IllegalAccessException e) {
            e.printStackTrace();
        }
        isShow = false;
    }

    public void setView(View view) {
        toast.setView(view);
    }

    public View getView() {
        return toast.getView();
    }

    /**
     * Set how long to show the view for.
     * @see #LENGTH_SHORT
     * @see #LENGTH_ALWAYS
     */
    public void setDuration(int duration) {
        mDuration = duration;
    }

    public int getDuration() {
        return mDuration;
    }

    public void setMargin(float horizontalMargin, float verticalMargin) {
        toast.setMargin(horizontalMargin, verticalMargin);
    }

    public float getHorizontalMargin() {
        return toast.getHorizontalMargin();
    }

    public float getVerticalMargin() {
        return toast.getVerticalMargin();
    }

    public void setGravity(int gravity, int xOffset, int yOffset) {
        toast.setGravity(gravity,xOffset,yOffset);
    }

    public int getGravity() {
        return toast.getGravity();
    }

    public int getXOffset() {
        return toast.getXOffset();
    }

    public int getYOffset() {
        return toast.getYOffset();
    }

    public int getAnimations() {
        return animations;
    }

    public void setAnimations(int animations) {
        this.animations = animations;
    }

    private void initTN() {
        try {
            Field tnField = toast.getClass().getDeclaredField("mTN");
            tnField.setAccessible(true);
            mTN = tnField.get(toast);
            show = mTN.getClass().getMethod("show");
            hide = mTN.getClass().getMethod("hide");

            Field tnParamsField = mTN.getClass().getDeclaredField("mParams");
            tnParamsField.setAccessible(true);
            params = (WindowManager.LayoutParams) tnParamsField.get(mTN);
            params.flags = WindowManager.LayoutParams.FLAG_NOT_TOUCH_MODAL
                    | WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE;

            params.width = WindowManager.LayoutParams.MATCH_PARENT;

            /**设置动画*/
            if (animations != -1) {
                params.windowAnimations = animations;
            }

            /**调用tn.show()之前一定要先设置mNextView*/
            Field tnNextViewField = mTN.getClass().getDeclaredField("mNextView");
            tnNextViewField.setAccessible(true);
            tnNextViewField.set(mTN, toast.getView());
        } catch (Exception e) {
            e.printStackTrace();
        }
        setGravity(Gravity.CENTER_HORIZONTAL | Gravity.TOP, 0, 0);
    }

}