android - 如何在 Android 布局中定义所有子项的文本颜色？

Question

我目前正在用外部来源的数据填充 TableLayout。以编程方式创建 TableRows 和 TextViews 后，它们的文本颜色设置为白色(似乎是默认值)。

我知道我可以使用 myTextView.setTextColor(Color.BLACK); 设置颜色，但我正在寻找一种在 XML 布局文件中定义颜色的方法 (我想将视觉效果与逻辑分开)。有谁知道如何做到这一点？

我的布局(充满示例行):

<?xml version="1.0" encoding="utf-8"?>
<TableLayout  xmlns:android="http://schemas.android.com/apk/res/android"
  xmlns:app="http://schemas.android.com/apk/res-auto"
  android:layout_height="wrap_content"
  android:layout_width="match_parent"
  android:id="@+id/mytable"
  android:stretchColumns="0,1,2"
  app:layout_behavior="@string/appbar_scrolling_view_behavior"
  style="@style/AppTheme" >

  <TableRow>
    <TextView android:text="field1" />
    <TextView android:text="field2" />
    <TextView android:text="field3" />
  </TableRow>
</TableLayout>

我的java代码:

public void updateTable() {

  TableLayout table = (TableLayout) findViewById(R.id.mytable);
  table.removeAllViewsInLayout();
  TableRow row = new TableRow(getApplicationContext());
  TextView text;

  // Add Heading
  text = new TextView(getApplicationContext());
  text.setText("Head1");
  text.setTextColor(this.textColor);
  row.addView(text);

  text = new TextView(getApplicationContext());
  text.setText("Head2");
  text.setTextColor(this.textColor);
  row.addView(text);

  text = new TextView(getApplicationContext());
  text.setText("Head3");
  text.setTextColor(this.textColor);
  row.addView(text);

  table.addView(row);

  for(Data d : this.getData()) {
    TableRow r = new TableRow(getApplicationContext());
    TextView t1 = new TextView(getApplicationContext());
    TextView t2 = new TextView(getApplicationContext());
    TextView t3 = new TextView(getApplicationContext());

    t1.setTextColor(this.textColor);
    t2.setTextColor(this.textColor);
    t3.setTextColor(this.textColor);

    t1.setText(d.getData1());
    t2.setText(d.getData2());
    t3.setText(d.getData3());

    r.addView(t1);
    r.addView(t2);
    r.addView(t3);
    table.addView(r);
  }
}

Answer 1

创建一个 styles.xml:

<?xml version="1.0" encoding="utf-8"?>
<resources>
<style name="MyTheme" parent="android:Theme">
    <item name="android:textViewStyle">@style/MyTextViewStyle</item>
</style>

<style name="MyTextViewStyle" parent="android:Widget.TextView">
    <item name="android:textColor">#F00</item>
    <item name="android:textStyle">bold</item>
</style>
</resources>

然后只需将该主题应用到您在 AndroidManifest.xml 中的应用程序:

<application […] android:theme="@style/MyTheme">…