Question

我想以编程方式将TabeLayout添加到LinearLayout。这是我的activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical" 
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:id="@+id/content">
</LinearLayout>

这就是我在MainActivity中添加表的方法

public class MainActivity extends Activity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        LinearLayout linearLayout = (LinearLayout) findViewById(R.id.content);
        String[] content = new String[] {"Hello", "World", "Test"};

        float d = getResources().getDisplayMetrics().density;
        int dp = (int)(3*d);
        TableLayout.LayoutParams tableParams =
                new TableLayout.LayoutParams(TableLayout.LayoutParams.WRAP_CONTENT,
                        TableLayout.LayoutParams.WRAP_CONTENT);
        TableRow.LayoutParams rowParams =
                new TableRow.LayoutParams(TableRow.LayoutParams.WRAP_CONTENT,
                        TableRow.LayoutParams.WRAP_CONTENT);
        TableLayout table = new TableLayout(this);
        table.setLayoutParams(tableParams);
        for(int i = 0; i < content.length; i++) {
            TableRow row = new TableRow(this);
            row.setLayoutParams(rowParams);
            int length = content[i].length();
            TextView textView = new TextView(this);
            textView.setLayoutParams(rowParams);
            textView.setText(content[i]);
            textView.setPadding(dp, 0, dp, 0);
            row.setBackgroundColor(Color.BLUE);
            row.addView(textView);
            table.addView(row);
        }
        table.setBackgroundColor(Color.GRAY);
        linearLayout.addView(table);
    }


}

如您所见，tableParams设置为wrap_content。但是，当我设置我看到的表的背景颜色时，表的宽度与显示一样长。为什么会这样，我怎么能改变它呢？

这是输出： http://postimg.org/image/e29bsg9vv/

Answer 1

TableLayout处理宽度有点不同。您需要让TableLayout知道它可以缩小列尝试：

try {
    BufferedReader r = new BufferedReader(new InputStreamReader(System.in));
    String command = " ";
    while (command != null) {
        System.out.print(">>> ");
        command = r.readLine();
        processCommand(command);
    }
 } catch (IOException e) {
     System.out.println("Something went wrong.");
 }

查看TableLayout的参考文档。特别要注意的是：

表的总宽度由其父容器定义。

另外，作为提示，您可以替换：

table.setShrinkAllColumns(true);

使用：

table.setLayoutParams(tableParams);
linearLayout.addView(table);

TableLayout填充父级

1 个答案: