Question

我以编程方式创建了一个ImageView，我想设置layout_centerVertical =＆＃34; true＆＃34;和android：layout_centerHorizontal =＆＃34; true＆＃34;。

我试过这段代码：

    ImageView myImage = new ImageView(this);
    Resources res = getApplicationContext().getResources();
    myImage.setImageResource(res.getIdentifier((card.getColor() + "_" + card.getFigure()).toLowerCase(), "drawable", this.getPackageName()));
    myImage.setTag(IMAGEVIEW_TAG);

    myImage.setOnTouchListener(new MyTouchListener());

    RelativeLayout layout = (RelativeLayout) findViewById(R.id.toplinear);
    layout.addView(myImage);

    View positiveButton = myImage.getRootView();
    RelativeLayout.LayoutParams layoutParams =
            (RelativeLayout.LayoutParams)positiveButton.getLayoutParams();
    layoutParams.addRule(RelativeLayout.CENTER_IN_PARENT, RelativeLayout.TRUE);
    positiveButton.setLayoutParams(layoutParams);

但是logcat会抛出错误：

引起：java.lang.NullPointerException：尝试调用虚拟方法＆＃39; void android.widget.RelativeLayout $ LayoutParams.addRule（int， INT）＆＃39;在null对象引用上在pl.ds13ds14.ucp.CardsActivity.AddCard（CardsActivity.java:55）

第55行包含：

layoutParams.addRule(RelativeLayout.CENTER_IN_PARENT, RelativeLayout.TRUE);

Answer 1

试试这个：

$src = $request->path;
$dest = "/home/$randomNum/serverFiles";

echo $ssh->exec("adduser --force-badname $randomNum");
echo $ssh->exec("echo \"$randomNum:test123\" | chpasswd");

echo $ssh->exec("cp -r $src $dest");
echo $ssh->exec("usermod -d $dest $randomNum");

echo $ssh->exec("cd $dest && ./samp03svr");

$ssh->disconnect();

如何创建一个新对象并以编程方式将layout_centerVertical设置为true？

1 个答案: