ScrollView不工作它只是显示空视图

Question

我正在尝试在Scroll视图中添加Text-view，然后以编程方式将此滚动视图添加到Relative-layout，但它只显示空视图，甚至只将文本视图添加到Relative-layout其工作。

    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);

Answer 1

ScrollView scroll = new ScrollView(context);
scroll.setBackgroundColor(android.R.color.transparent);
scroll.setLayoutParams(new LayoutParams(LayoutParams.FILL_PARENT,
                                             LayoutParams.FILL_PARENT));
scroll.addView(yourview);

Answer 2

试试这段代码。我希望它会有用。

1）Java代码

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;
}

}

2）XML代码

<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>

Temp Text Temp Text Temp的位置放置了您的文字。
它为我工作。看看吧。

谢谢。

Answer 3

在抓取RelativeLayout对象时，不要在同一语句中添加ScrollView。 我认为你应该指定你正在使用的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);

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);