[HorizontalScrollView] 水平滾動無螢寬限制 (進階)

< 定義於.java >

在此想讓user按下畫面中的Button後, 能無限增加水平列的widget, 即使會超出螢寬

./res/layout/main.xml (這邊只擷取重點段)
    <LinearLayout
        android:orientation="vertical"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:background="@drawable/content_area"
        android:layout_marginLeft="40dp"
        android:layout_marginRight="40dp"
        android:layout_marginBottom="40dp"
        >
        <HorizontalScrollView
            android:id="@+id/scrollView"
            android:layout_width="fill_parent"
            android:layout_height="80dp"
            android:layout_marginTop="40dp"
            android:layout_marginLeft="80dp"
            android:layout_marginRight="80dp"
            >
            <TableLayout
                android:layout_width="fill_parent"
                android:layout_height="fill_parent"
                android:orientation="horizontal"
                >
                <TableRow
                    android:id="@+id/row"
                    android:layout_width="fill_parent"
                    android:layout_height="fill_parent"
                    />
            </TableLayout>          
        </HorizontalScrollView>
       
        <Button
            android:id="@+id/bt"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_marginTop="40dp"
            android:layout_marginLeft="80dp"
            android:layout_marginRight="80dp"
            android:text="button"
            android:textSize="50sp"
            />
    </LinearLayout>



./src/com.tsots.Hori_malloc/Hori_malloc.java
package com.tsots.Hori_malloc;

import android.app.Activity;
import android.content.Context;
import android.os.Bundle;
import android.view.Gravity;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.Window;
import android.widget.Button;
import android.widget.HorizontalScrollView;
import android.widget.TableRow;
import android.widget.TextView;

public class Activity_Hori_malloc extends Activity
{
    Context context = Activity_Hori_malloc.this;
    HorizontalScrollView scrollView;
    TableRow row;
    Button bt;
    TextView tv1;
    TextView tv2;

    @Override
    public void onCreate(Bundle savedInstanceState)
    {
        this.requestWindowFeature(Window.FEATURE_NO_TITLE);
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
             
        scrollView = (HorizontalScrollView) findViewById(R.id.scrollView);
        row = (TableRow) scrollView.findViewById(R.id.row);
        bt = (Button) findViewById (R.id.bt);       
        
        //一樣預設是6個TextView, 不過宣告在.java
        for (int i = 0; i < 6; i++)
        {  
            tv1 = new TextView(context);
            tv1.setText("text");
            tv1.setHeight(80);
            tv1.setWidth(280);
            //文字的部份要置中
            tv1.setGravity(Gravity.CENTER);
            tv1.setTextSize(60);
            //使可以被focus
            tv1.setFocusable(true);
            tv1.setFocusableInTouchMode(true);
            //被focus時底色的變化
            tv1.setBackgroundResource(R.drawable.selector_app_category);

            //將widget加進TableRow中
            row.addView(tv1);
        }
 
        //當user按下Button就新增一個widget在TableRow中       
        bt.setOnClickListener(new OnClickListener()
        {
            @Override
            public void onClick(View arg0)
            {
                tv2 = new TextView(context);
                tv2.setText("New Text");
                tv2.setHeight(80);
                tv2.setWidth(280);
                tv2.setGravity(Gravity.CENTER);
                tv2.setTextSize(60);
                tv2.setFocusable(true);
                tv2.setFocusableInTouchMode(true);
                tv2.setBackgroundResource(R.drawable.selector_app_category);

                //將圖加入TextView中：setCompoundDrawablesWithIntrinsicBounds(Drawable放左, Drawable放上, Drawable放右, Drawable放下)            tv2.setCompoundDrawablesWithIntrinsicBounds(getResources().getDrawable(R.drawable.bear3), null, null, null);

                row.addView(tv2);
            }         
        });                    
    }     
}

手指在HorizontalScrollView上做滑動或
adb shell input keyevent 22向右移動
可以看到新增加的widget