main.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent">
<SeekBar android:id="@+id/seek"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:max="100"
android:progress="50"
android:secondaryProgress="75" />
<TextView android:id="@+id/progress"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
<TextView android:id="@+id/tracking"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
</LinearLayout>
package com.sun;
import android.app.Activity;
import android.os.Bundle;
import android.widget.SeekBar;
import android.widget.TextView;
public class MainActivity extends Activity implements SeekBar.OnSeekBarChangeListener {
SeekBar mSeekBar;
TextView mProgressText;
TextView mTrackingText;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
mSeekBar = (SeekBar)findViewById(R.id.seek);
mSeekBar.setOnSeekBarChangeListener(this);
mProgressText = (TextView)findViewById(R.id.progress);
mTrackingText = (TextView)findViewById(R.id.tracking);
}
//进度条改变就会触发这个
public void onProgressChanged(SeekBar seekBar, int progress, boolean fromTouch) {
mProgressText.setText(progress + " " +
"from touch" + "=" + fromTouch);
}
//进度条点中了
public void onStartTrackingTouch(SeekBar seekBar) {
mTrackingText.setText("Tracking on");
}
//进度条没有焦点了
public void onStopTrackingTouch(SeekBar seekBar) {
mTrackingText.setText("Tracking off");
}
}