Android中的ListView更改项目查看

Question

我正在ListView工作，点击项目时我需要将图片更改为列表中的项目视图作为我的照片。但是当我在列表中向下滚动时，我发现其他项目被点击了。这是我的代码

@Override
public void onItemClick(AdapterView<?> adapterView, View view, int i, long l) {
    if (i != lastpostion) {
        viewselected = getViewByPosition(lastpostion, listView);
        play = viewselected.findViewById(R.id.play);
        pause = viewselected.findViewById(R.id.pause);
        play.setVisibility(View.GONE);
        pause.setVisibility(View.VISIBLE);

    }
    isfound = true;
    play = view.findViewById(R.id.play);
    pause = view.findViewById(R.id.pause);
    play.setVisibility(View.VISIBLE);
    pause.setVisibility(View.GONE);
    //Toast.makeText(this,""+listView.getFirstVisiblePosition(),Toast.LENGTH_SHORT).show();
    //Toast.makeText(this,""+listView.getChildCount(),Toast.LENGTH_SHORT).show();

    lastpostion = i;
}

Answer 1

我认为这样可以改变您的代码

public int climbStairs(int n) {
    int dp[] = new int[n+1];
    if(n==1) {
        return 1;
    } else if(n==2){
        return 2;            
    } else {
        dp[1] = 1;
        dp[2] = 2;

        for(int i =3; i<=n;i++) {
            dp[i] = dp[i-1] + dp[i-2];
        }
        return dp[n];
    }
}