Question

我的程序的工作方式是我为3个项目输入用户输入，使用这三个项目以编程方式创建水平LinearLayout。然后将LinearLayout放在XML中定义的RelativeLayout内。

用户可以继续将这些3项水平LL添加到RelativeLayout的底部，在这种情况下作为列表。

我在每个setLayoutParams对象的TextView方法中指定权重

    TextView quantityText = new TextView(MainActivity.this);
    quantityText.setLayoutParams(new LinearLayout.LayoutParams(
            LinearLayout.LayoutParams.WRAP_CONTENT, LinearLayout.LayoutParams.WRAP_CONTENT, 1f));
    quantityText.setText("" + currentIngredientMeasurementQuantity);


    TextView typeText = new TextView(MainActivity.this);
    typeText.setLayoutParams(new LinearLayout.LayoutParams(
            LinearLayout.LayoutParams.WRAP_CONTENT, LinearLayout.LayoutParams.WRAP_CONTENT, 1f));
    typeText.setText(currentIngredientMeasurementType);


    TextView nameText = new TextView(MainActivity.this);
    nameText.setLayoutParams(new LinearLayout.LayoutParams(
            LinearLayout.LayoutParams.WRAP_CONTENT, LinearLayout.LayoutParams.WRAP_CONTENT, 4f));
    nameText.setText(currentIngredientName);


    LinearLayout ll = new LinearLayout(MainActivity.this);
    ll.setId(View.generateViewId());

    RelativeLayout relativeLayout = (RelativeLayout) findViewById(R.id.ingredient_list_relativelayout);

    RelativeLayout.LayoutParams relativeParams = new RelativeLayout.LayoutParams(
            RelativeLayout.LayoutParams.MATCH_PARENT, RelativeLayout.LayoutParams.WRAP_CONTENT);

    //Find last member of RelativeLayout
    View lastIngredient = (View) relativeLayout.getChildAt(totalIngredientQuantity - 1);

    relativeParams.addRule(RelativeLayout.BELOW, lastIngredient.getId());
    relativeParams.setMargins(0, 0, 0, 0);


    ll.addView(quantityText);
    ll.addView(typeText);
    ll.addView(nameText);

    relativeLayout.addView(ll, relativeParams);

问题是，TextViews没有按照我希望的方式显示。我希望这三个项目中的每一个都垂直排列，就像一个正确的列表。

相反，我得到something like this。您可以看到字符串的长度以某种方式影响布局的存储/显示方式。

我知道这是一大堆代码，但是任何帮助都会受到赞赏！

Answer 1

您需要在Gravity上将TextViews设置为左（或开始），然后再将其添加到LinearLayout，就像这样：

LinearLayout.LayoutParams name_lp = new LinearLayout.LayoutParams(
    LinearLayout.LayoutParams.WRAP_CONTENT,
    LinearLayout.LayoutParams.WRAP_CONTENT
);
name_lp.gravity = Gravity.LEFT;
nameText.setLayoutParams(name_lp);

Answer 2

试试这个： -

创建自定义布局，而不是动态创建控件

custom.xml

<LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal"
        android:weightSum="90">
        <TextView
            android:id="@+id/textview1"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_weight="30"
            android:gravity="center"
            android:text="text1"/>
        <TextView
            android:id="@+id/textview2"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:gravity="center"
            android:layout_weight="30"
            android:text="text2"/>
        <TextView
            android:id="@+id/textview3"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:gravity="center"
            android:layout_weight="30"
            android:text="text3"/>
    </LinearLayout>

在RelativeLayout中添加此视图

View view = factory.inflate(R.layout.custom, null);
relativeLayout.addView(view);

Answer 3

您需要将layout_width属性设置为0才能使layout weight属性正常运行。我做了一些改变你的代码，以使它适合我。

试试这个，

private void addNewRow(float currentIngredientMeasurementQuantity, String currentIngredientMeasurementType, String currentIngredientName) {

    TextView quantityText = new TextView(MainActivity.this);
    quantityText.setLayoutParams(new LinearLayout.LayoutParams(0, LinearLayout.LayoutParams.WRAP_CONTENT, 1f));
    quantityText.setText("" + currentIngredientMeasurementQuantity);

    TextView typeText = new TextView(MainActivity.this);
    typeText.setLayoutParams(new LinearLayout.LayoutParams(0, LinearLayout.LayoutParams.WRAP_CONTENT, 1f));
    typeText.setText(currentIngredientMeasurementType);

    TextView nameText = new TextView(MainActivity.this);
    nameText.setLayoutParams(new LinearLayout.LayoutParams(0, LinearLayout.LayoutParams.WRAP_CONTENT, 4f));
    nameText.setText(currentIngredientName);

    LinearLayout ll = new LinearLayout(MainActivity.this);
    if (Build.VERSION.SDK_INT > Build.VERSION_CODES.JELLY_BEAN) {
        ll.setId(View.generateViewId());
    } else {
        ll.setId(totalIngredientQuantity);
    }

    RelativeLayout relativeLayout = (RelativeLayout) findViewById(R.id.ingredient_list_relativelayout);

    RelativeLayout.LayoutParams relativeParams = new RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.MATCH_PARENT, RelativeLayout.LayoutParams.WRAP_CONTENT);

    //Find last member of RelativeLayout
    View lastIngredient = (View) relativeLayout.getChildAt(totalIngredientQuantity - 1);

    if (lastIngredient != null) {
        relativeParams.addRule(RelativeLayout.BELOW, lastIngredient.getId());
        relativeParams.setMargins(0, 0, 0, 0);
    }

    ll.addView(quantityText);
    ll.addView(typeText);
    ll.addView(nameText);

    relativeLayout.addView(ll, relativeParams);
}

Answer 4

尝试告诉您的Textview使用他们可以获得的所有可用空间。所以他们将填满整个LinearLayout。

而不是WRAP_CONTENT使用MATCH_PARENT或FILL_PARENT

在XML中，你可以像这里描述的那样使用0dip：In android layouts what is the effect/meaning of layout_height="0dip"

另一个想法是使用TableLayout或GridLayout http://developer.android.com/reference/android/widget/GridLayout.html http://developer.android.com/reference/android/widget/TableLayout.html

玩得开心

Android LinearLayout中的布局权重问题

4 个答案: