拖动条（seekbar）

xml

--------------------------

<?xml version="1.0" encoding="utf-8" ?>
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
>
<SeekBar android:id="@+id/seek"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:max="100"
android:progress="50"
android:secondaryProgress="75"
/>
<TextView android:id="@+id/progress"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
/>
<TextView android:id="@+id/tracking"
android:layout_width="fill_parent"
android:layout_height="wrap_content" />
</LinearLayout>

java

----------------------

package com.example.huanglifeng.menudemo;

import android.app.Activity;
import android.app.AlertDialog;
import android.app.TabActivity;
import android.graphics.Color;
import android.os.Bundle;
import android.view.Gravity;
import android.view.LayoutInflater;
import android.view.View;
import android.view.Window;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.CheckBox;
import android.widget.CompoundButton;
import android.widget.RadioButton;
import android.widget.RadioGroup;
import android.widget.SeekBar;
import android.widget.SimpleAdapter;
import android.widget.Spinner;
import android.widget.TabHost;
import android.widget.TextView;
import android.widget.Toast;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Objects;

public class MainActivity extends Activity{

SeekBar mSeekBar;
TextView mProgressText;
TextView mTrackingText;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mSeekBar=(SeekBar)findViewById(R.id.seek);
mProgressText=(TextView)findViewById(R.id.progress);
mTrackingText=(TextView)findViewById(R.id.tracking);
mSeekBar.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {
@Override
public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) {
mProgressText.setText("正在调节，值为："+progress);
}

@Override
public void onStartTrackingTouch(SeekBar seekBar) {
mTrackingText.setText("开始调节");
}

@Override
public void onStopTrackingTouch(SeekBar seekBar) {
mTrackingText.setText("停止调节");
}
});
}
}

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