ANDROID_MARS学习笔记_S01_012_SeekBar

<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"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context=".MainActivity" >

<SeekBar
android:id="@+id/firstSeekBar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:max="100"
/>
</RelativeLayout>

package com.marschen.s01_e18_seekbar;

import android.app.Activity;
import android.os.Bundle;
import android.view.Menu;
import android.widget.SeekBar;
import android.widget.SeekBar.OnSeekBarChangeListener;

public class MainActivity extends Activity {

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

seekBar = (SeekBar)findViewById(R.id.firstSeekBar);
seekBar.setProgress(30);
seekBar.setSecondaryProgress(50);

SeekBarListener listener = new SeekBarListener();
seekBar.setOnSeekBarChangeListener(listener);
}

class SeekBarListener implements OnSeekBarChangeListener{

/**
* seekBar 该对象指的是触发了监听器的SeekBar对象
* progress 指的是当前SeekBar的进度
* fromUser
*/
@Override
public void onProgressChanged(SeekBar SeekBar, int progress, boolean fromUser) {
System.out.println("progress:" + progress + ",fromUser:" + fromUser);
}

@Override
public void onStartTrackingTouch(SeekBar seekBar) {
System.out.println("onStart");
}

@Override
public void onStopTrackingTouch(SeekBar seekBar) {
System.out.println("onStop");
}

}

@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;
}

}