android seekbar控件,android之SeekBar控件用法

package com.example.mars_2400_seekbar;

import android.support.v7.app.ActionBarActivity;

import android.support.v7.app.ActionBar;

import android.support.v4.app.Fragment;

import android.app.Activity;

import android.os.Bundle;

import android.view.LayoutInflater;

import android.view.Menu;

import android.view.MenuItem;

import android.view.View;

import android.view.ViewGroup;

import android.widget.SeekBar;

import android.widget.SeekBar.OnSeekBarChangeListener;

import android.widget.TextView;

import android.os.Build;public classMainActivity extends Activity implements OnSeekBarChangeListener {privateTextView tv;privateSeekBar sb;

@Overrideprotected voidonCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

tv=(TextView) findViewById(R.id.textView1);

sb=(SeekBar) findViewById(R.id.seekbar);

sb.setOnSeekBarChangeListener(this);

}

@Overridepublic void onProgressChanged(SeekBar seekBar, intprogress,

boolean fromUser) {//TODO Auto-generated method stub

tv.setText("Progress is" +progress+ (fromUser ? "Trigger" : "Nontrigger") + "by user.");

}