处理程序 postDelay 只工作一次

Question

I'm trying to change delay of handler in handler.postDelay() but here it works only once then it stops. The crucial method is in the end. I'm thinking how I can make the runnable work in loop of postDelay().

class MyGestureListener implements GestureDetector.OnGestureListener {
    @Override
    public boolean onSingleTapUp(MotionEvent e) {
        column = (int) (e.getX() / cellWidth);
        row = (int) (e.getY() / cellHeight);
        selectedNode = (6 * row) + column;


        if (selectedNode == enemyNode && !atak && GameMovingObject.ableToAttack(chibiAlive, enemyAlive, chibiNode, enemyNode)) {

            if (attackOption) {
                chibi1.attack(enemies.get(enemyId));
                //attackOption=false;
                atak = true;

                if (!enemyAlive) {
                    enemyId = enemyId + 1;
                    enemies.add(new Enemy(enemyId, GameSurface.this, wolf, Enemy.genPosition(getWidth(), getHeight())[0], Enemy.genPosition(getWidth(), getHeight())[1], cellWidth, cellHeight));
                    enemyAlive = true;
                }
            }
        }

        // ...
        return true;
    }
}

relevant methods

public static boolean ableToAttack(boolean chibiAlive, boolean enemyAlive, int chibiNode, int enemyNode) {
    if(!chibiAlive || !enemyAlive)
        return false;

    boolean able = false;
    if (chibiNode > enemyNode)
        if (chibiNode - enemyNode == 1 || chibiNode - enemyNode == 5 || chibiNode - enemyNode == 6 || chibiNode - enemyNode == 7)
            able = true;
    if (enemyNode > chibiNode)
        able = enemyNode - chibiNode == 1 || enemyNode - chibiNode == 5 || enemyNode - chibiNode == 6 || enemyNode - chibiNode == 7;
    return able;
}

and

public void attack(Enemy enemy) {
    if (partOfBody.equals("legs"))
        enemy.getLegsDamage(generateDamage());

    if (enemy.hp <= 0) {
        enemy.hp = 0;
        gs.attackOption = false;
        gs.setEnemyAlive(false);
        addExperience();
        dbHelper.setExp("1", exp);
        // ...
    }
}

and finally

public void getLegsDamage(int legsDamage) {
    fullLegsDamage = fullLegsDamage + legsDamage;
    hp = hp - legsDamage;
    if(fullLegsDamage>50) {
        legsDamaged=2;
        handler2.removeCallbacksAndMessages(null);
        handler2.postDelayed(runnable, 4000);
    }
}

runnable looks like this

runnable = new Runnable() {
    @Override
    public void run() {

        hit=true;
        //gs.canvas.drawBitmap(bitmap,200,200, null);
        cc.setHp(cc.getHp() - generateDamage());
        if(cc.getHp() <= 0) {
            cc.setHp(0);
            gs.setChibiAlive(false);
        }
        ((Gra)gs.getContext()).updateChibiHpMp(cc);
    }
};

I've been thinking about this for whole day up until now. Help me please.

Answer 1

Not completely sure what you are asking for but I interpret the question as you want the Runnable to run every 4s and in that case the Runnable needs to post it self at before it's done, like this:

runnable = new Runnable() {
    @Override
    public void run() {
        hit=true;
        //gs.canvas.drawBitmap(bitmap,200,200, null);
        cc.setHp(cc.getHp() - generateDamage());
        if(cc.getHp() <= 0) {
            cc.setHp(0);
            gs.setChibiAlive(false);
        }
        ((Gra)gs.getContext()).updateChibiHpMp(cc);

        // Schedule the runnable again
        handler2.postDelayed(this, 4000)
    }
};