SeekBar

1.用SeekBar显示刻度

<LinearLayout 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:orientation="vertical"
tools:context=".MainActivity" >

<TextView
android:id="@+id/textview1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="" />

<TextView
android:id="@+id/textview2"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="" />

<SeekBar
android:id="@+id/seekbar1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:max="100"
android:progress="30" />

<SeekBar
android:id="@+id/seekbar2"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:max="100"
android:progress="30"
android:secondaryProgress="60"
/>

</LinearLayout>

package com.example.android_seekbar01;

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

public class MainActivity extends Activity implements OnSeekBarChangeListener{

private TextView textView1;
private TextView textView2;
private SeekBar seekBar1;
private SeekBar seekBar2;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
textView1=(TextView) findViewById(R.id.textview1);
textView2=(TextView) findViewById(R.id.textview2);
seekBar1=(SeekBar) findViewById(R.id.seekbar1);
seekBar2=(SeekBar) findViewById(R.id.seekbar2);
seekBar1.setOnSeekBarChangeListener(this);
seekBar2.setOnSeekBarChangeListener(this);
}

@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;
}

@Override
public void onProgressChanged(SeekBar seekBar, int progress,
boolean fromUser) {
// TODO Auto-generated method stub
if(seekBar.getId()==R.id.seekbar1){
textView1.setText("seekBar1当前刻度"+progress);
}else{
textView2.setText("seekBar2当前刻度"+progress);
}
}

//seekBar开始拖动位置
@Override
public void onStartTrackingTouch(SeekBar seekBar) {
// TODO Auto-generated method stub
if(seekBar.getId()==R.id.seekbar1){
textView1.setText("seekBar1开始拖动");
}else{
textView2.setText("seekBar2当前拖动");
}
}
//seekBar停止拖动位置
@Override
public void onStopTrackingTouch(SeekBar seekBar) {
// TODO Auto-generated method stub
if(seekBar.getId()==R.id.seekbar1){
textView1.setText("seekBar1停止拖动");
}else{
textView2.setText("seekBar2停止拖动");
}
}

}