Question

我正在尝试在我的第一个活动的onCreate（）方法中创建一个horizontalscrollview，因为我想要滚动大量的textview。以下是我到目前为止的情况：

import android.app.Activity;
import android.os.Bundle;
import android.util.Log;
import android.view.Menu;
import android.view.ViewGroup.LayoutParams;
import android.widget.HorizontalScrollView;
import android.widget.LinearLayout;
import android.widget.TextView;

public class MainActivity extends Activity {

    LinearLayout linscrollview;
    HorizontalScrollView scrollview;

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

        scrollview = (HorizontalScrollView) findViewById(R.id.scrollview_layout);
        linscrollview = new LinearLayout(this);


        for(int i=0; i<5; i++) {
            TextView tv = new TextView(this);
            tv.setWidth(LayoutParams.WRAP_CONTENT);
            tv.setHeight(LayoutParams.WRAP_CONTENT);
            tv.setText("" + i);
            tv.setTextSize(20);
            LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(new LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT));
            params.setMargins(10, 0, 10, 0);
            tv.setLayoutParams(params);
            tv.setId(i);
            linscrollview.addView(tv);
        }


        scrollview.addView(linscrollview);
    }

    @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;
    }

}

我没有收到任何错误，但没有显示任何文字视图。

Answer 1

您的问题可能与setWidth和setHeight方法有关。它们设置了TextView宽度和高度的精确值，如文档中所述：

使TextView正好宽这么多像素。你可以做到同样的事情是在LayoutParams中指定这个数字。

http://developer.android.com/reference/android/widget/TextView.html#setWidth(int)

您要做的是为TextView设置LayoutParams，因为您已经在代码中稍微向下。所以只需要摆脱这两个方法调用就可以了。

Answer 2

这是为textview实现水平滚动的一大块代码，根据要求修改相同的内容。

                    textView.setHorizontallyScrolling(true);
                    textView.setSingleLine(true);
                    textView.setMovementMethod(new ScrollingMovementMethod());
                    textView.setHorizontalScrollBarEnabled(true);
                    textView.setSelected(true);

Answer 3

请这样做

linscrollview .setOrientation(LinearLayout.HORIZONTAL);

和ViewGroup.LayoutParams params = new ViewGroup.LayoutParams(FILL_PARENT, WRAP_CONTENT);

Answer 4

我在这里编码。它会给你像horizonatal listview的列表

String[] name={"PRASHANT","PRASHANT","PRASHANT","PRASHANT","PRASHANT","PRASHANT","PRASHANT"} ;

myLInearLayoutmain =(LinearLayout) findViewById(R.id.linearLayoutmain);



for(int i =0;i<6;i++)
{
    LinearLayout li=new LinearLayout(getApplicationContext());
    LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(LinearLayout.LayoutParams.WRAP_CONTENT, LinearLayout.LayoutParams.WRAP_CONTENT);
    li.setOrientation(LinearLayout.VERTICAL);
    LinearLayout.LayoutParams params1 = new LinearLayout.LayoutParams(LinearLayout.LayoutParams.WRAP_CONTENT, LinearLayout.LayoutParams.WRAP_CONTENT);

    LinearLayout.LayoutParams paramsnew = new LinearLayout.LayoutParams(LinearLayout.LayoutParams.MATCH_PARENT, LinearLayout.LayoutParams.MATCH_PARENT);


    params1.setMargins(30, 20, 30, 0);
    //add textView
    valueTV = new TextView(this);
    valueTV.setText(""+name[i]);
    valueTV.setId(5);
    valueTV.setLayoutParams(paramsnew);
    valueTV.setGravity(Gravity.CENTER);

    // adding Button to linear
    valueB = new Button(this);
    valueB.setText(""+name[i]);
    valueB.setId(i);
    valueB.setLayoutParams(params);
    valueB.setOnClickListener(this);
    valueB.setGravity(Gravity.CENTER);


    //add the textView and the Button to LinearLayout
    li.addView(valueTV);
    li.addView(valueB);
    li.addView(img);

    li.setLayoutParams(params1);
    myLInearLayoutmain.addView(li);
}

以编程方式创建水平滚动视图不起作用

4 个答案: