在具有权重的 LinearLayout 中居中图像

Question

这是我的问题的图片： 绿色和红色矩形中的两个小图像是我想要居中的图像。他们应该分别落在他们父母的中间。

这就是它不起作用的原因（据我所知）： 我已将包装器的宽度设置为 0，以避免与为每个包装器设置的权重发生冲突。这让我可以在中间划分屏幕并在两侧划分内容。不幸的是，我认为这也意味着每张图像都试图将自己置于包装器的 0dp 部分而不是由权重生成的动态宽度上。

这是代码，你自己看看：

public void mergeHotels(Hotel keepHotel, Hotel absorbHotel, ArrayList<Hotel> absorbArray){
    Context context = getApplicationContext();

    //get the current player and let him choose what to do with stock first
    Player thisPlayer = players[getPlayerIndexByPlayOrder(CURRENT_TURN)];

    //create the dialog for exchanging stocks       
    ContextThemeWrapper ctw = new ContextThemeWrapper(this, R.style.AppTheme);
    AlertDialog.Builder stockExchangeDialog = new AlertDialog.Builder(ctw);
    stockExchangeDialog.setTitle(getResources().getString(R.string.stock_exchange_dialog_title));

    LinearLayout dialogLayout = new LinearLayout(context);
    dialogLayout.setOrientation(LinearLayout.VERTICAL);

        LinearLayout dialogHeader = new LinearLayout(context);
        dialogHeader.setOrientation(LinearLayout.HORIZONTAL);
        dialogHeader.setLayoutParams(new LinearLayout.LayoutParams(LinearLayout.LayoutParams.MATCH_PARENT, 50, 1.0f));

            View blankSpace = new View(context);
            blankSpace.setLayoutParams(new LinearLayout.LayoutParams(0, LinearLayout.LayoutParams.MATCH_PARENT, 2.0f));

            LinearLayout tileOneWrapper = new LinearLayout(context);
            tileOneWrapper.setLayoutParams(new LinearLayout.LayoutParams(0, LinearLayout.LayoutParams.MATCH_PARENT, 1.0f));
            tileOneWrapper.setBackgroundColor(Color.GREEN);

                ImageView tileOne = new ImageView(context);
                String tileOneResourceName = "tile_" + keepHotel.getName().toLowerCase();
                int tileOneResourceId = getResources().getIdentifier(tileOneResourceName, "drawable", getPackageName());
                tileOne.setBackgroundResource(tileOneResourceId);
                LinearLayout.LayoutParams tileOneParams = new LinearLayout.LayoutParams(40, 40);
                tileOneParams.gravity = Gravity.CENTER;
                tileOne.setLayoutParams(tileOneParams);



            tileOneWrapper.addView(tileOne);

            LinearLayout tileTwoWrapper = new LinearLayout(context);
            tileTwoWrapper.setLayoutParams(new LinearLayout.LayoutParams(0, LinearLayout.LayoutParams.MATCH_PARENT, 1.0f));
            tileTwoWrapper.setBackgroundColor(Color.RED);

                ImageView tileTwo = new ImageView(context);
                String tileTwoResourceName = "tile_" + absorbHotel.getName().toLowerCase();
                int tileTwoResourceId = getResources().getIdentifier(tileTwoResourceName, "drawable", getPackageName());
                tileTwo.setBackgroundResource(tileTwoResourceId);
                LinearLayout.LayoutParams tileTwoParams = new LinearLayout.LayoutParams(40, 40);
                tileTwoParams.gravity = Gravity.CENTER;
                tileTwo.setLayoutParams(tileTwoParams);

            tileTwoWrapper.addView(tileTwo);

        dialogHeader.addView(blankSpace);
        dialogHeader.addView(tileOneWrapper);
        dialogHeader.addView(tileTwoWrapper);

        LinearLayout dialogBody = new LinearLayout(context);
        dialogBody.setOrientation(LinearLayout.VERTICAL);   

        for (int i = 0; i < players.length; i++) {
            LinearLayout playerStockDetails = new LinearLayout(context);
            playerStockDetails.setOrientation(LinearLayout.HORIZONTAL);

                TextView playerName = new TextView(context);
                playerName.setLayoutParams(new LinearLayout.LayoutParams(LinearLayout.LayoutParams.MATCH_PARENT, LinearLayout.LayoutParams.WRAP_CONTENT, 1.0f));

                TextView playerMoney = new TextView(context);
                playerMoney.setLayoutParams(new LinearLayout.LayoutParams(LinearLayout.LayoutParams.MATCH_PARENT, LinearLayout.LayoutParams.WRAP_CONTENT, 1.0f));

                TextView playerTileOneQuantity = new TextView(context);
                playerTileOneQuantity.setLayoutParams(new LinearLayout.LayoutParams(LinearLayout.LayoutParams.MATCH_PARENT, LinearLayout.LayoutParams.WRAP_CONTENT, 1.0f));
                playerTileOneQuantity.setBackgroundColor(Color.LTGRAY);

                TextView playerTileTwoQuantity = new TextView(context);
                playerTileTwoQuantity.setLayoutParams(new LinearLayout.LayoutParams(LinearLayout.LayoutParams.MATCH_PARENT, LinearLayout.LayoutParams.WRAP_CONTENT, 1.0f));
                playerTileTwoQuantity.setBackgroundColor(Color.CYAN);

                playerName.setText(players[i].getName());
                playerMoney.setText(String.valueOf(players[i].getMoney()));
                playerTileOneQuantity.setText(String.valueOf(players[i].getStockQuantityByCode(getHotelCodeByName(keepHotel.getName()))));
                playerTileTwoQuantity.setText(String.valueOf(players[i].getStockQuantityByCode(getHotelCodeByName(absorbHotel.getName()))));

            playerStockDetails.addView(playerName);
            playerStockDetails.addView(playerMoney);
            playerStockDetails.addView(playerTileOneQuantity);
            playerStockDetails.addView(playerTileTwoQuantity);
            playerStockDetails.setLayoutParams(new LinearLayout.LayoutParams(LinearLayout.LayoutParams.MATCH_PARENT, LinearLayout.LayoutParams.WRAP_CONTENT, 1.0f));

            dialogBody.addView(playerStockDetails);
        }

    dialogLayout.addView(dialogHeader);
    dialogLayout.addView(dialogBody);       

    stockExchangeDialog.setView(dialogLayout);
    stockExchangeDialog.show();
}

那么如何让它基于动态宽度（基于权重）而不是我在 LayoutParams 中声明的静态宽度来居中图像？

提前感谢您的帮助！

JRadTheBad

Answer 1

试试这个..

将此行添加到您的LinearLayout LayoutParams

tileOneWrapper.gravity = Gravity.CENTER;

还有

tileTwoWrapper.gravity = Gravity.CENTER;