Android ScrollView不工作，只显示空视图

我试图在一个滚动视图中添加一个文本视图，然后以编程方式将这个滚动视图添加到相对布局中，但它只是显示空视图，甚至只将文本视图添加到相对布局中

    TextView aboutTextView = new TextView(this);
    aboutTextView.setText(R.string.aboutText);

    aboutTextView.setId(5);
    aboutTextView.setLayoutParams(new LayoutParams(
            LayoutParams.FILL_PARENT, LayoutParams.WRAP_CONTENT));

    ScrollView scroll = new ScrollView(this);
    scroll.setPadding(R.dimen.scroll_padding, R.dimen.scroll_padding,
            R.dimen.scroll_padding, R.dimen.scroll_padding);
    scroll.setLayoutParams(new LayoutParams(LayoutParams.FILL_PARENT,
            LayoutParams.FILL_PARENT));
    scroll.addView(aboutTextView);

    RelativeLayout fragmentContainer = (RelativeLayout) findViewById(R.id.fragmentContainer);
    fragmentContainer.addView(scroll);

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试试这个代码。我希望它会有用

1） Java代码 2） XML代码

放置

Temp Text Temp Text Temp

放置文本
它对我有用。过来看。

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谢谢。

抓取RelativeLayout对象时，不要在同一语句中添加ScrollView。 我认为您应该指定正在使用的LayoutParams的哪个实现

aboutTextView.setLayoutParams(new ScrollView.LayoutParams(
            LayoutParams.FILL_PARENT, LayoutParams.WRAP_CONTENT));
ScrollView scroll = new ScrollView(this);
int scrollPadding = getResources().getDimensionPixelSize(R.dimen.scroll_padding);
scroll.setPadding(scrollPadding, scrollPadding, scrollPadding, scrollPadding);
scroll.setLayoutParams(new RelativeLayout.LayoutParams(LayoutParams.FILL_PARENT,
            LayoutParams.FILL_PARENT));
scroll.addView(aboutTextView);
RelativeLayout fragmentContainer = (RelativeLayout) findViewById(R.id.fragmentContainer);
    fragmentContainer;
fragmentContainer.addView(scroll);

也看到了这一点，感谢您的快速回复，我在线性布局中添加了textview，然后将其添加到scrollview中。scrollview也设置了scroll view的背景色，但它仍然不工作。您需要可滚动的textview吗？@runtime还是想要xml格式？android:maxLines=“AN_INTEGER”android:scrollbars=“垂直”然后使用：textView.setMovementMethod（新的ScrollingMovementMethod（））；是的，它的工作很好，这是因为我设置它的方式存在填充问题。如果要在dimens.xml中定义它，必须获取填充值getDimensionPixelSize。如下所示：getResources（）.getDimensionPixelSize（R.dimen.scroll\u padding）；

package com.temp;

import android.app.Activity;
import android.os.Bundle;
import android.view.Menu;
import android.view.ViewGroup.LayoutParams;
import android.widget.RelativeLayout;
import android.widget.ScrollView;
import android.widget.TextView;

public class MainActivity extends Activity {

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    TextView aboutTextView = new TextView(this);
    aboutTextView
            .setText("Temp Text Temp Text Temp");

    aboutTextView.setId(5);
    aboutTextView.setLayoutParams(new LayoutParams(LayoutParams.FILL_PARENT, LayoutParams.WRAP_CONTENT));

    ScrollView scroll = new ScrollView(this);
    scroll.setPadding(5, 5, 5, 5);
    scroll.setLayoutParams(new LayoutParams(LayoutParams.FILL_PARENT, LayoutParams.FILL_PARENT));
    scroll.addView(aboutTextView);

    RelativeLayout fragmentContainer = (RelativeLayout) findViewById(R.id.fragmentContainer);
    fragmentContainer.addView(scroll);
}

@Override
public boolean onCreateOptionsMenu(Menu menu) {
    // Inflate the menu; this adds items to the action bar if it is present.
    getMenuInflater().inflate(R.menu.main, menu);
    return true;
}

}

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity" >

    <RelativeLayout
        android:id="@+id/fragmentContainer"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        >
    </RelativeLayout>

</RelativeLayout>

aboutTextView.setLayoutParams(new ScrollView.LayoutParams(
            LayoutParams.FILL_PARENT, LayoutParams.WRAP_CONTENT));
ScrollView scroll = new ScrollView(this);
int scrollPadding = getResources().getDimensionPixelSize(R.dimen.scroll_padding);
scroll.setPadding(scrollPadding, scrollPadding, scrollPadding, scrollPadding);
scroll.setLayoutParams(new RelativeLayout.LayoutParams(LayoutParams.FILL_PARENT,
            LayoutParams.FILL_PARENT));
scroll.addView(aboutTextView);
RelativeLayout fragmentContainer = (RelativeLayout) findViewById(R.id.fragmentContainer);
    fragmentContainer;
fragmentContainer.addView(scroll);