Question

在将视图的XML代码直接重新创建到java代码之后，它将停止正常工作。

XML代码是：

<?xml version="1.0" encoding="utf-8"?>
<TableLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/activity_main"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context="com.example.virviil.splashscreen.MainActivity">


    <TableRow
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_weight="0.7" />
    <TableRow
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:gravity="center_horizontal">

        <ProgressBar
            android:layout_width="wrap_content"
            android:layout_height="wrap_content" />
    </TableRow>
    <TableRow
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_weight="0.3" />
</TableLayout>

java代码是：

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    TableLayout activity_main = new TableLayout(this);
    activity_main.setId(R.id.activity_main);
    LayoutParams layout_439 = new LayoutParams(0,0);
    layout_439.width = LayoutParams.MATCH_PARENT;
    layout_439.height = LayoutParams.MATCH_PARENT;
    activity_main.setLayoutParams(layout_439);

    TableRow tableRow_879 = new TableRow(this);
    LayoutParams layout_311 = new LayoutParams(0,0);
    layout_311.width = LayoutParams.MATCH_PARENT;
    layout_311.height = LayoutParams.MATCH_PARENT;
    layout_311.weight = 0.7f;
    tableRow_879.setLayoutParams(layout_311);
    activity_main.addView(tableRow_879);

    TableRow tableRow_600 = new TableRow(this);
    tableRow_600.setGravity(Gravity.CENTER_HORIZONTAL);
    LayoutParams layout_61 = new LayoutParams(0,0);
    layout_61.width = LayoutParams.MATCH_PARENT;
    layout_61.height = LayoutParams.MATCH_PARENT;
    tableRow_600.setLayoutParams(layout_61);

    ProgressBar progressBar_343 = new ProgressBar(this);
    LayoutParams layout_81 = new LayoutParams(0,0);
    layout_81.width = LayoutParams.WRAP_CONTENT;
    layout_81.height = LayoutParams.WRAP_CONTENT;
    progressBar_343.setLayoutParams(layout_81);
    tableRow_600.addView(progressBar_343);
    activity_main.addView(tableRow_600);

    TableRow tableRow_315 = new TableRow(this);
    LayoutParams layout_574 = new LayoutParams(0,0);
    layout_574.width = LayoutParams.MATCH_PARENT;
    layout_574.height = LayoutParams.MATCH_PARENT;
    layout_574.weight = 0.3f;
    tableRow_315.setLayoutParams(layout_574);
    activity_main.addView(tableRow_315);

    setContentView(activity_main);
    //setContentView(R.layout.activity_main);
}

这个想法是可编程改变进度的垂直对齐。所以，在XML中它可以正常工作在JAVA中 - 不是。

Answer 1

您唯一需要注意的是在整个xml视图中使用LinearLayout而不是TableLayout。

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/activity_main"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context="com.example.virviil.splashscreen.MainActivity">
<TableLayout
    android:layout_width="match_parent"
    android:layout_height="match_parent">

....

移动到代码后Android xml无法正常工作

1 个答案: