标签：风飞雪未扬 从零开始学android seekbar组件的使用 android改变屏幕亮度
|
public SeekBar(Context context)
|
构造
|
创建SeekBar类的对象
|
|
public void setOnSeekBarChangeListener(
SeekBar.OnSeekBarChangeListener l)
|
普通
|
设置改变监听操作
|
|
public synchronized void setMax(int max)
|
普通
|
设置增长的最大值
|
<span style="font-size:18px;"><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:max="100"
android:progress="30"
android:id="@+id/seekBar1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true"
android:layout_marginTop="60dp" />
<TextView
android:id="@+id/textView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignLeft="@+id/seekBar1"
android:layout_below="@+id/seekBar1"
android:layout_marginLeft="28dp"
android:layout_marginTop="32dp"
android:text="seek1"
android:textAppearance="?android:attr/textAppearanceMedium" />
<SeekBar
android:id="@+id/seekBar2"
android:max="100"
android:secondaryProgress="60"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_below="@+id/textView1"
android:layout_marginTop="67dp" />
<TextView
android:id="@+id/textView2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignLeft="@+id/textView1"
android:layout_below="@+id/seekBar2"
android:layout_marginTop="28dp"
android:text="seek2"
android:textAppearance="?android:attr/textAppearanceMedium" />
</RelativeLayout>
</span><span style="font-size:18px;">package com.example.seekbar;
import android.app.Activity;
import android.os.Bundle;
import android.widget.SeekBar;
import android.widget.SeekBar.OnSeekBarChangeListener;
import android.widget.TextView;
public class MainActivity extends Activity implements OnSeekBarChangeListener{
private TextView textView1,textView2;
private SeekBar seekBar1,seekBar2;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
textView1=(TextView)this.findViewById(R.id.textView1);
textView2=(TextView)this.findViewById(R.id.textView2);
seekBar1=(SeekBar)this.findViewById(R.id.seekBar1);
seekBar2=(SeekBar)this.findViewById(R.id.seekBar2);
seekBar1.setOnSeekBarChangeListener(this);
seekBar2.setOnSeekBarChangeListener(this);
}
@Override
public void onProgressChanged(SeekBar seekBar, int position, boolean flag) {
// TODO Auto-generated method stub
if (seekBar.getId()==seekBar1.getId())
{
textView1.setText("当前seekbar1刻度"+position);
}
else {
textView2.setText("当前seekbar2刻度"+position);
}
}
@Override
public void onStartTrackingTouch(SeekBar seekBar) {
// TODO Auto-generated method stub
if (seekBar.getId()==seekBar1.getId())
{
textView1.setText("开始滑动seek1");
}
else {
textView2.setText("开始滑动seek2");
}
}
@Override
public void onStopTrackingTouch(SeekBar seekBar) {
// TODO Auto-generated method stub
if (seekBar.getId()==seekBar1.getId())
{
textView1.setText("停止滑动seek1");
}
else {
textView2.setText("停止滑动seek2");
}
}
}
</span>
<span style="font-size:18px;"><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" >
<TextView
android:id="@+id/textView1"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true"
android:layout_marginTop="24dp"
android:text="调节手机亮度" />
<SeekBar
android:max="100"
android:id="@+id/seekBar1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignLeft="@+id/textView1"
android:layout_below="@+id/textView1"
android:layout_marginTop="117dp"
android:progress="50" />
</RelativeLayout></span><span style="font-size:18px;">package com.example.seekbardemo;
import android.app.Activity;
import android.os.Bundle;
import android.view.WindowManager;
import android.widget.SeekBar;
import android.widget.SeekBar.OnSeekBarChangeListener;
public class MainActivity extends Activity implements OnSeekBarChangeListener {
private SeekBar myseekBar;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
myseekBar=(SeekBar)this.findViewById(R.id.seekBar1);
myseekBar.setOnSeekBarChangeListener(this);
}
@Override
public void onProgressChanged(SeekBar seekBar, int position, boolean flag) {
// TODO Auto-generated method stub
}
//调节亮度的方法
private void setScreenBrightness(float num) {
WindowManager.LayoutParams layoutParams =
getWindow().getAttributes(); // 取得window属性
layoutParams.screenBrightness = num; // num已经除以100
super.getWindow().setAttributes(layoutParams); // 0~1之间
}
@Override
public void onStartTrackingTouch(SeekBar arg0) {
// TODO Auto-generated method stub
}
//在拖动结束是使用getProgress获得当前的Progress值来设置亮度
@Override
public void onStopTrackingTouch(SeekBar seekBar) {
// TODO Auto-generated method stub
if (seekBar.getId()==myseekBar.getId()) {
// 将progress除以100并转换为float类型
setScreenBrightness((float)seekBar.getProgress()/100);
}
}
}
</span>
从零开始学android<SeekBar滑动组件.二十二.>,布布扣,bubuko.com
从零开始学android<SeekBar滑动组件.二十二.>
标签：风飞雪未扬 从零开始学android seekbar组件的使用 android改变屏幕亮度
原文地址：http://blog.csdn.net/u013616976/article/details/38614385
