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问题描述

| 我正在以编程方式创建SeekBar，如下所示：

SeekBar seekBar = new SeekBar(this);
seekBar.setMax(15);
seekBar.setIndeterminate(true);
seekBar.setMinimumWidth(200);

ShapeDrawable thumb = new ShapeDrawable(new ovalShape());

thumb.getPaint().setColor(0x00FF00);
thumb.setIntrinsicHeight(80);
thumb.setIntrinsicWidth(30);

seekBar.setThumb(thumb);
seekBar.setProgress(1);

但是我只能看到一个小的SeekBar。 可能是什么问题？ 谢谢     

解决方法

        尝试以下代码

import android.app.Activity;
import android.graphics.Color;
import android.graphics.drawable.ShapeDrawable;
import android.graphics.drawable.shapes.OvalShape;
import android.os.Bundle;
import android.view.View;
import android.widget.LinearLayout.LayoutParams;
import android.widget.SeekBar;
import android.widget.SeekBar.OnSeekBarChangeListener;

public class Sample2 extends Activity {
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        // TODO Auto-generated method stub
        super.onCreate(savedInstanceState);

        SeekBar seekBar = new SeekBar(this);
        seekBar.setMax(15);
//      seekBar.setIndeterminate(true);

        ShapeDrawable thumb = new ShapeDrawable(new OvalShape());

        thumb.setIntrinsicHeight(80);
        thumb.setIntrinsicWidth(30);
        seekBar.setThumb(thumb);
        seekBar.setProgress(1);
        seekBar.setVisibility(View.VISIBLE);
        seekBar.setBackgroundColor(Color.BLUE);

        LayoutParams lp = new LayoutParams(200,50);
        seekBar.setLayoutParams(lp);
        seekBar.setOnSeekBarChangeListener(new OnSeekBarChangeListener() {

            public void onStopTrackingTouch(SeekBar arg0) {
                // TODO Auto-generated method stub
                System.out.println(\".....111.......\");

            }

            public void onStartTrackingTouch(SeekBar arg0) {
                // TODO Auto-generated method stub
                System.out.println(\".....222.......\");
            }

            public void onProgressChanged(SeekBar arg0,int arg1,boolean arg2) {
                // TODO Auto-generated method stub
                System.out.println(\".....333.......\"+arg1);
            }
        });
        setContentView(seekBar);
    }
}

谢谢 迪帕克     ,        尝试取出可能有不良效果的

seekBar.setIndeterminate(true);

。