使用Android的传感器亮度变化 [英] Android changing brightness using sensor
本文介绍了使用Android的传感器亮度变化的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我有一个应用程序，通过它我可以手动更改设备的亮度。我想这样做，使用传感器。什么code我必须补充？
还什么样的变化我必须在manifest做？
这是我的code：
包com.example.brightnessdemo;进口android.os.Bundle;
进口android.provider.Settings;
进口android.provider.Settings.SettingNotFoundException;
进口android.provider.Settings.System;
进口android.app.Activity;
进口android.content.ContentResolver;
进口android.view.Menu;
进口android.view.Window;
进口android.view.WindowManager;
进口android.widget.RelativeLayout.LayoutParams;
进口android.widget.SeekBar;
进口android.widget.SeekBar.OnSeekBarChangeListener;
进口android.widget.TextView;
进口android.widget.Toast;公共类MainActivity扩展活动
{私人搜索栏brightbar;
私人诠释亮度;
私人ContentResolver的cResolver;
私人窗口窗口;TextView的电视;
//浮动BackLightValue = 0.5F;
@覆盖
公共无效的onCreate（捆绑savedInstanceState）
{
super.onCreate（savedInstanceState）;
的setContentView（R.layout.main）; brightbar =（搜索栏）findViewById（R.id.seekBar1）;
电视=（的TextView）findViewById（R.id.textView1）; cResolver = getContentResolver（）;
窗口= getWindow（）; brightbar.setMax（100）;
brightbar.setKeyProgressIncrement（1）; 尝试
{
亮度= System.getInt（cResolver，System.SCREEN_BRIGHTNESS）;
}
赶上（SettingNotFoundException E）
{
// TODO自动生成catch块
e.printStackTrace（）;
}
brightbar.setProgress（亮度）; INT SysBackLightValue =（int）的（亮度）;
android.provider.Settings.System.putInt(getContentResolver(),android.provider.Settings.System.SCREEN_BRIGHTNESS,SysBackLightValue); brightbar.setOnSeekBarChangeListener（新OnSeekBarChangeListener（）
{ @覆盖
公共无效onStopTrackingTouch（搜索栏搜索栏）
{
System.putInt（cResolver，System.SCREEN_BRIGHTNESS，亮度）;
android.view.WindowManager.LayoutParams layoutpars = window.getAttributes（）;
layoutpars.screenBrightness =亮度;
window.setAttributes（layoutpars）; } @覆盖
公共无效onStartTrackingTouch（搜索栏搜索栏）
{
// TODO自动生成方法存根 } @覆盖
公共无效onProgressChanged（搜索栏搜索栏，INT进步，布尔FROMUSER）
{
亮度=进展情况;
tv.setText（+亮度）; }
}）;}@覆盖
公共布尔onCreateOptionsMenu（菜单菜单）
{
。getMenuInflater（）膨胀（R.menu.main，菜单）;
返回true;
}
}
解决方案
您可以使用此根据变化的搜索栏值来设置
WindowManager.LayoutParams布局= getWindow（）的getAttributes（）;
layout.screenBrightness =亮度;
。getWindow（）setAttributes（布局）;
如果你需要它保持一致，那么你可以去用
IHardwareService接口
下面是我发现的例子。
http://www.tutorialforandroid.com/2009/01/改变 - 屏幕brightness.html
com.test包;进口android.app.Activity;
进口android.hardware.Sensor;
进口android.hardware.SensorEvent;
进口android.hardware.SensorEventListener;
进口android.hardware.SensorManager;
进口android.os.Bundle;
进口android.util.Log;公共类测试扩展活动实现SensorEventListener { 私人的SensorManager mSensorManager;
私人传感器mLight; @覆盖
公共无效的onCreate（捆绑savedInstanceState）{
super.onCreate（savedInstanceState）;
的setContentView（R.layout.main）; mSensorManager =（的SensorManager）getSystemService（SENSOR_SERVICE）;
mLight = mSensorManager.getDefaultSensor（Sensor.TYPE_LIGHT）; }
@覆盖
保护无效onResume（）{
mSensorManager.registerListener（这一点，mLight，SensorManager.SENSOR_DELAY_NORMAL）;
super.onResume（）;
}
@覆盖
保护无效的onPause（）{
mSensorManager.unregisterListener（本）;
super.onPause（）;
}
公共无效onAccuracyChanged（传感器传感器，精度INT）{
如果（sensor.getType（）== Sensor.TYPE_LIGHT）{
Log.i（传感器已更改，精度：+精度）;
} } 公共无效onSensorChanged（SensorEvent事件）{
如果（event.sensor.getType（）== Sensor.TYPE_LIGHT）{
Log.i（传感器已更改，onSensor更改：+ event.values [0]）;
} }
}
I have an app through which I can change the brightness of the device manually. I want to do that using the sensor. What code do I have to add? Also what changes I have to made in the manifest?
Here it is my code:
package com.example.brightnessdemo;
import android.os.Bundle;
import android.provider.Settings;
import android.provider.Settings.SettingNotFoundException;
import android.provider.Settings.System;
import android.app.Activity;
import android.content.ContentResolver;
import android.view.Menu;
import android.view.Window;
import android.view.WindowManager;
import android.widget.RelativeLayout.LayoutParams;
import android.widget.SeekBar;
import android.widget.SeekBar.OnSeekBarChangeListener;
import android.widget.TextView;
import android.widget.Toast;
public class MainActivity extends Activity
{
private SeekBar brightbar;
private int brightness;
private ContentResolver cResolver;
private Window window;
TextView tv;
//float BackLightValue = 0.5f;
@Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
brightbar=(SeekBar)findViewById(R.id.seekBar1);
tv=(TextView)findViewById(R.id.textView1);
cResolver=getContentResolver();
window=getWindow();
brightbar.setMax(100);
brightbar.setKeyProgressIncrement(1);
try
{
brightness=System.getInt(cResolver, System.SCREEN_BRIGHTNESS);
}
catch (SettingNotFoundException e)
{
// TODO Auto-generated catch block
e.printStackTrace();
}
brightbar.setProgress(brightness);
int SysBackLightValue = (int)(brightness);
android.provider.Settings.System.putInt(getContentResolver(),android.provider.Settings.System.SCREEN_BRIGHTNESS,SysBackLightValue);
brightbar.setOnSeekBarChangeListener(new OnSeekBarChangeListener()
{
@Override
public void onStopTrackingTouch(SeekBar seekBar)
{
System.putInt(cResolver, System.SCREEN_BRIGHTNESS, brightness);
android.view.WindowManager.LayoutParams layoutpars = window.getAttributes();
layoutpars.screenBrightness = brightness;
window.setAttributes(layoutpars);
}
@Override
public void onStartTrackingTouch(SeekBar seekBar)
{
// TODO Auto-generated method stub
}
@Override
public void onProgressChanged(SeekBar seekBar, int progress,boolean fromUser)
{
brightness = progress;
tv.setText(""+brightness);
}
});
}
@Override
public boolean onCreateOptionsMenu(Menu menu)
{
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
}
解决方案
You can use this to set according to the changed seekbar value
WindowManager.LayoutParams layout = getWindow().getAttributes();
layout.screenBrightness = brightness;
getWindow().setAttributes(layout);
If you need it consistent then you can go with IHardwareService interface Here is an example that i found
http://www.tutorialforandroid.com/2009/01/changing-screen-brightness.html
package com.test;
import android.app.Activity;
import android.hardware.Sensor;
import android.hardware.SensorEvent;
import android.hardware.SensorEventListener;
import android.hardware.SensorManager;
import android.os.Bundle;
import android.util.Log;
public class Test extends Activity implements SensorEventListener{
private SensorManager mSensorManager;
private Sensor mLight;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
mSensorManager = (SensorManager)getSystemService(SENSOR_SERVICE);
mLight = mSensorManager.getDefaultSensor(Sensor.TYPE_LIGHT);
}
@Override
protected void onResume() {
mSensorManager.registerListener(this, mLight, SensorManager.SENSOR_DELAY_NORMAL);
super.onResume();
}
@Override
protected void onPause() {
mSensorManager.unregisterListener(this);
super.onPause();
}
public void onAccuracyChanged(Sensor sensor, int accuracy) {
if(sensor.getType() == Sensor.TYPE_LIGHT){
Log.i("Sensor Changed", "Accuracy :" + accuracy);
}
}
public void onSensorChanged(SensorEvent event) {
if( event.sensor.getType() == Sensor.TYPE_LIGHT){
Log.i("Sensor Changed", "onSensor Change :" + event.values[0]);
}
}
}
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