本例子是對SeekBar的練習,通過拖動進度在TextView上來顯示目前進度。
布局檔案:seekbar_layout.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<TextView
android:id="@+id/tv_text"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
<SeekBar
android:id="@+id/seekBar1"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
</LinearLayout>
AtySeekBar.java檔案:
package com.fxj.composit;
import com.fxj.compractice.R;
import android.app.Activity;
import android.os.Bundle;
import android.widget.SeekBar;
import android.widget.TextView;
import android.widget.SeekBar.OnSeekBarChangeListener;
public class AtySeekBar extends Activity {
private SeekBar seekBar;
private TextView tv;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.seekbar_layout);
seekBar = (SeekBar) findViewById(R.id.seekBar1);
tv = (TextView) findViewById(R.id.tv_text);
// 設定最大進度
seekBar.setMax(100);
// 對SeekBar設定改變監聽
seekBar.setOnSeekBarChangeListener(new OnSeekBarChangeListener() {
@Override
public void onStopTrackingTouch(SeekBar seekBar) {
// TODO Auto-generated method stub
}
@Override
public void onStartTrackingTouch(SeekBar seekBar) {
// TODO Auto-generated method stub
}
@Override
public void onProgressChanged(SeekBar seekBar, int progress,
boolean fromUser) {
// 在TextView上顯示目前進度
tv.setText("目前進度:" + progress + "%");
}
});
}
}
運作效果:
結束。