wordpress站标签也打不开,咸阳建设局网站,网站生成器怎么做,中国十大广告公司排行榜Android 一体机研发之修改系统设置————屏幕亮度
Android 一体机研发之修改系统设置————声音
Android 一体机研发之修改系统设置————自动锁屏
前言
最近工作略微有点儿空闲#xff0c;抽空给大家总结一下#xff1a;近期一直搞得一体机app研发#xff0c;适用… Android 一体机研发之修改系统设置————屏幕亮度
Android 一体机研发之修改系统设置————声音
Android 一体机研发之修改系统设置————自动锁屏
前言
最近工作略微有点儿空闲抽空给大家总结一下近期一直搞得一体机app研发适用于医疗渠道。
一体机找工厂定制了一下板子和系统找他们fw后期app会以apk的形式封装到系统中当然了开机logo也会封装进去。
在这版一体机有一个可以更改系统设置的功能版块记得之前总结过Android 调用系统设置有兴趣的可以去看一下这一篇将把部分功能做一个细分化讲解。
但是在调用系统设置的时候有些系统功能让用户一看就和手机一样的功能并且有些功能是我们不需要的这里就需要我们自己去实现修改系统权限的功能。
接下来会给大家出几篇一体机研发之修改系统设置系列文章欢迎我们共同学习进步
屏幕亮度
修改系统屏幕亮度这种操作还是挺常见的一般在多媒体开发中多少会涉及到。 从上图中虽然很难看出效果展示但是大概都能猜到功能的具体实现就是通过seekBar来控制亮度的百分比。
如果想实现修改屏幕亮度功能这里涉及了一个高级隐私权限需要用户在app设置页面手动授权。
设计思路 AndroidManifest设置权限; 获取系统屏幕亮度 修改系统Settings 中屏幕亮度注册监听屏幕亮度变化影响所有页面和App 3.1 判断权限 3.2 有则修改屏幕亮度 3.3 无则引导用户授权
具体实现
AndroidManifest设置权限 !-- 修改系统设置 --uses-permission android:nameandroid.permission.WRITE_SETTINGS /uses-permission android:nameandroid.permission.READ_CONTACTS /uses-permission android:namecom.android.launcher.permission.READ_SETTINGS /uses-permission android:nameandroid.permission.HARDWARE_TEST /获取系统屏幕亮度
Java /*** 获取app屏幕亮度** param activity* return*/public static int getScreenBrightness(Activity activity) {try {return Settings.System.getInt(activity.getContentResolver(), Settings.System.SCREEN_BRIGHTNESS);} catch (Settings.SettingNotFoundException e) {e.printStackTrace();}return 0;}Kotlin /*** 获取系统屏幕亮度(0-255)*/private fun getScreenBrightness(): Int {try {return Settings.System.getInt(this.contentResolver, Settings.System.SCREEN_BRIGHTNESS)} catch (e: SettingNotFoundException) {e.printStackTrace()}return 0}修改系统Settings 中屏幕亮度影响所有页面和App
注册监听 系统屏幕亮度变化
Java private void registerContentObserver() {ContentResolver contentResolver getContentResolver();if (contentResolver ! null) {contentResolver.registerContentObserver(Settings.System.getUriFor(Settings.System.SCREEN_BRIGHTNESS),true,mBrightnessObserver);}}Kotlin private fun registerContentObserver() {this.contentResolver?.registerContentObserver(Settings.System.getUriFor(Settings.System.SCREEN_BRIGHTNESS),true,mBrightnessObserver)}监听系统亮度变化
Java private ContentObserver mBrightnessObserver new ContentObserver(new Handler()) {Overridepublic void onChange(boolean selfChange) {super.onChange(selfChange);ContentResolver contentResolver getContentResolver();if (contentResolver ! null) {mScreenBrightness getScreenBrightness(BrightActivity.this);Log.e(监听亮度 , init: mScreenBrightness);updateNum(mScreenBrightness);setWindowBrightness(mScreenBrightness);}}};Kotlin private val mBrightnessObserver object : ContentObserver(Handler(Looper.getMainLooper())) {override fun onChange(selfChange: Boolean) {super.onChange(selfChange)try {thisBrightnessActivity.contentResolver?.let {mScreenBrightness Settings.System.getInt(it, Settings.System.SCREEN_BRIGHTNESS)updateNum(mScreenBrightness)setWindowBrightness(mScreenBrightness)}} catch (e: SettingNotFoundException) {e.printStackTrace()}}}注销监听
Java Overrideprotected void onDestroy() {super.onDestroy();ContentResolver contentResolver getContentResolver();if (contentResolver ! null) {contentResolver.unregisterContentObserver((ContentObserver) mBrightnessObserver);}}Kotlin override fun onDestroy() {super.onDestroy()//注销监听this.contentResolver?.unregisterContentObserver(mBrightnessObserver)}通过seekBar修改系统Settings 中屏幕亮度
Java brightBar.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {RequiresApi(api Build.VERSION_CODES.M)Overridepublic void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) {Log.e(动态屏幕亮度 , onProgressChanged: progress);mScreenBrightness progress * ratio;if (Settings.System.canWrite(BrightActivity.this)) {setScreenBrightness(mScreenBrightness);updateNum(mScreenBrightness);} else {Toast.makeText(BrightActivity.this, 没有修改权限, Toast.LENGTH_SHORT).show();// 打开允许修改Setting 权限的界面Intent intent new Intent(Settings.ACTION_MANAGE_WRITE_SETTINGS, Uri.parse(package: getPackageName()));startActivityForResult(intent,mRequestCode);}}Overridepublic void onStartTrackingTouch(SeekBar seekBar) {}Overridepublic void onStopTrackingTouch(SeekBar seekBar) {}});Kotlin seekBar.setOnSeekBarChangeListener(object : SeekBar.OnSeekBarChangeListener {override fun onProgressChanged(seekBar: SeekBar?, progress: Int, fromUser: Boolean) {Log.i(onProgressChanged----, progress)mScreenBrightness progress * ratio//判断是否有修改系统设置权限if (Settings.System.canWrite(thisBrightnessActivity)) {setScreenBrightness(mScreenBrightness)updateNum(mScreenBrightness)} else {Toast.makeText(thisBrightnessActivity, 没有修改权限, Toast.LENGTH_SHORT).show()// 打开允许修改系统设置权限的页面val intent Intent(Settings.ACTION_MANAGE_WRITE_SETTINGS, Uri.parse(package:$packageName))startActivityForResult(intent, mRequestCode)}}override fun onStartTrackingTouch(seekBar: SeekBar?) {}override fun onStopTrackingTouch(seekBar: SeekBar?) {}})用户已授权设置屏幕亮度
Java /*** 设置系统屏幕亮度影响所有页面和app* 注意这种方式是需要手动权限的android.permission.WRITE_SETTINGS*/private final void setScreenBrightness(int brightness) {//先检测调节模式setScreenManualMode();//再设置Settings.System.putInt(getContentResolver(), Settings.System.SCREEN_BRIGHTNESS, brightness);}private final void setScreenManualMode() {try {//获取当前系统亮度调节模式int mode Settings.System.getInt(getContentResolver(), Settings.System.SCREEN_BRIGHTNESS_MODE);//如果是自动则改为手动if (mode Settings.System.SCREEN_BRIGHTNESS_MODE_AUTOMATIC) {Settings.System.putInt(getContentResolver(),Settings.System.SCREEN_BRIGHTNESS_MODE,Settings.System.SCREEN_BRIGHTNESS_MODE_MANUAL);}} catch (Settings.SettingNotFoundException var2) {var2.printStackTrace();}}Kotlin /*** 设置系统屏幕亮度影响所有页面和app* 注意这种方式是需要手动权限的android.permission.WRITE_SETTINGS*/private fun setScreenBrightness(brightness: Int) {try {//先检测调节模式setScreenManualMode()//再设置Settings.System.putInt(this.contentResolver, Settings.System.SCREEN_BRIGHTNESS, brightness)} catch (e: SettingNotFoundException) {e.printStackTrace()}}/*** 设置系统亮度调节模式(SCREEN_BRIGHTNESS_MODE)* SCREEN_BRIGHTNESS_MODE_MANUAL 手动调节* SCREEN_BRIGHTNESS_MODE_AUTOMATIC 自动调节*/private fun setScreenManualMode() {try {//获取当前系统亮度调节模式val mode Settings.System.getInt(this.contentResolver, Settings.System.SCREEN_BRIGHTNESS_MODE)//如果是自动则改为手动if (mode Settings.System.SCREEN_BRIGHTNESS_MODE_AUTOMATIC) {Settings.System.putInt(this.contentResolver,Settings.System.SCREEN_BRIGHTNESS_MODE,Settings.System.SCREEN_BRIGHTNESS_MODE_MANUAL)}} catch (e: SettingNotFoundException) {e.printStackTrace()}}监听系统按键 //监听系统按键Overridepublic boolean onKeyDown(int keyCode, KeyEvent event) {switch (keyCode) {case KeyEvent.KEYCODE_VOLUME_DOWN:if (mScreenBrightness ratio) {mScreenBrightness - ratio;} else {mScreenBrightness 1;}Log.e(Down , onKeyDown: mScreenBrightness);setWindowBrightness(mScreenBrightness);updateNum(mScreenBrightness);return true;case KeyEvent.KEYCODE_VOLUME_UP:if (mScreenBrightness (255 - ratio)) {mScreenBrightness ratio;} else {mScreenBrightness 255;}Log.e(Up , onKeyDown: mScreenBrightness);setWindowBrightness(mScreenBrightness);updateNum(mScreenBrightness);return true;/* case KeyEvent.KEYCODE_VOLUME_MUTE:return true;*/}return super.onKeyDown(keyCode, event);}完整操作
Java
/*** author 拉莫帅* date 2023/2/8* address* Desc 修改系统亮度*/
public class BrightActivity extends Activity {/*** 非系统签名应用引导用户手动授权修改Settings 权限**/private int mRequestCode 1;private SeekBar brightBar;//当前屏幕亮度private int mScreenBrightness 0;//每次加减的比例private int ratio 25;private ContentObserver mBrightnessObserver new ContentObserver(new Handler()) {Overridepublic void onChange(boolean selfChange) {super.onChange(selfChange);ContentResolver contentResolver getContentResolver();if (contentResolver ! null) {mScreenBrightness getScreenBrightness(BrightActivity.this);Log.e(监听亮度 , init: mScreenBrightness);updateNum(mScreenBrightness);setWindowBrightness(mScreenBrightness);}}};RequiresApi(api Build.VERSION_CODES.M)Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_bright);init();registerContentObserver();setListener();}private void init() {brightBar findViewById(R.id.brightBar);ImageView back findViewById(R.id.back);TextView title findViewById(R.id.title);title.setText(亮度);//获取当前亮度mScreenBrightness getScreenBrightness(BrightActivity.this);Log.e(当前亮度 , init: mScreenBrightness);updateNum(mScreenBrightness);back.setOnClickListener(new View.OnClickListener() {Overridepublic void onClick(View v) {finish();}});}private void registerContentObserver() {ContentResolver contentResolver getContentResolver();if (contentResolver ! null) {contentResolver.registerContentObserver(Settings.System.getUriFor(Settings.System.SCREEN_BRIGHTNESS),true,mBrightnessObserver);}}Overrideprotected void onDestroy() {super.onDestroy();ContentResolver contentResolver getContentResolver();if (contentResolver ! null) {contentResolver.unregisterContentObserver((ContentObserver) mBrightnessObserver);}}private void setListener() {brightBar.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {RequiresApi(api Build.VERSION_CODES.M)Overridepublic void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) {Log.e(动态屏幕亮度 , onProgressChanged: progress);mScreenBrightness progress * ratio;if (Settings.System.canWrite(BrightActivity.this)) {setScreenBrightness(mScreenBrightness);updateNum(mScreenBrightness);} else {Toast.makeText(BrightActivity.this, 没有修改权限, Toast.LENGTH_SHORT).show();// 打开允许修改Setting 权限的界面Intent intent new Intent(Settings.ACTION_MANAGE_WRITE_SETTINGS, Uri.parse(package: getPackageName()));startActivityForResult(intent,mRequestCode);}}Overridepublic void onStartTrackingTouch(SeekBar seekBar) {}Overridepublic void onStopTrackingTouch(SeekBar seekBar) {}});}RequiresApi(api Build.VERSION_CODES.M)Overrideprotected void onActivityResult(int requestCode, int resultCode, Intent data) {super.onActivityResult(requestCode, resultCode, data);if (requestCode mRequestCode) {if (Settings.System.canWrite((Context) BrightActivity.this)) {setScreenBrightness(mScreenBrightness);updateNum(mScreenBrightness);} else {Toast.makeText((Context) this, 您已拒绝修系统Setting的屏幕亮度权限, Toast.LENGTH_SHORT).show();}}}/*** 获取app屏幕亮度** param activity* return*/public static int getScreenBrightness(Activity activity) {try {return Settings.System.getInt(activity.getContentResolver(), Settings.System.SCREEN_BRIGHTNESS);} catch (Settings.SettingNotFoundException e) {e.printStackTrace();}return 0;}/*** 更新页面显示** param mScreenBrightness*/private final void updateNum(int mScreenBrightness) {//四舍五入int i (int) Math.floor(mScreenBrightness / ratio);brightBar.setProgress(i);}/*** 设置系统屏幕亮度影响所有页面和app* 注意这种方式是需要手动权限的android.permission.WRITE_SETTINGS*/private final void setScreenBrightness(int brightness) {//先检测调节模式setScreenManualMode();//再设置Settings.System.putInt(getContentResolver(), Settings.System.SCREEN_BRIGHTNESS, brightness);}private final void setScreenManualMode() {try {//获取当前系统亮度调节模式int mode Settings.System.getInt(getContentResolver(), Settings.System.SCREEN_BRIGHTNESS_MODE);//如果是自动则改为手动if (mode Settings.System.SCREEN_BRIGHTNESS_MODE_AUTOMATIC) {Settings.System.putInt(getContentResolver(),Settings.System.SCREEN_BRIGHTNESS_MODE,Settings.System.SCREEN_BRIGHTNESS_MODE_MANUAL);}} catch (Settings.SettingNotFoundException var2) {var2.printStackTrace();}}/*** 设置当前应用屏幕亮度只当前有效*/private final void setWindowBrightness(int brightness) {Window window this.getWindow();WindowManager.LayoutParams lp window.getAttributes();lp.screenBrightness (float) brightness / 255.0F;window.setAttributes(lp);}//监听系统按键Overridepublic boolean onKeyDown(int keyCode, KeyEvent event) {switch (keyCode) {case KeyEvent.KEYCODE_VOLUME_DOWN:if (mScreenBrightness ratio) {mScreenBrightness - ratio;} else {mScreenBrightness 1;}Log.e(Down , onKeyDown: mScreenBrightness);setWindowBrightness(mScreenBrightness);updateNum(mScreenBrightness);return true;case KeyEvent.KEYCODE_VOLUME_UP:if (mScreenBrightness (255 - ratio)) {mScreenBrightness ratio;} else {mScreenBrightness 255;}Log.e(Up , onKeyDown: mScreenBrightness);setWindowBrightness(mScreenBrightness);updateNum(mScreenBrightness);return true;/* case KeyEvent.KEYCODE_VOLUME_MUTE:return true;*/}return super.onKeyDown(keyCode, event);}
}Kotlin
class BrightnessActivity : AppCompatActivity() {//当前屏幕亮度private var mScreenBrightness: Int 0//每次加减的比例private var ratio: Int 25private var mRequestCode 1override fun onCreate(savedInstanceState: Bundle?) {super.onCreate(savedInstanceState)setContentView(R.layout.activity_brightness)init()registerContentObserver()setListener()}private fun init() {mScreenBrightness getScreenBrightness()updateNum(mScreenBrightness)}/*** 注册监听 系统屏幕亮度变化*/private fun registerContentObserver() {this.contentResolver?.registerContentObserver(Settings.System.getUriFor(Settings.System.SCREEN_BRIGHTNESS),true,mBrightnessObserver)}/*** 监听系统亮度变化*/private val mBrightnessObserver object : ContentObserver(Handler(Looper.getMainLooper())) {override fun onChange(selfChange: Boolean) {super.onChange(selfChange)try {thisBrightnessActivity.contentResolver?.let {mScreenBrightness Settings.System.getInt(it, Settings.System.SCREEN_BRIGHTNESS)updateNum(mScreenBrightness)setWindowBrightness(mScreenBrightness)}} catch (e: SettingNotFoundException) {e.printStackTrace()}}}override fun onDestroy() {super.onDestroy()//注销监听this.contentResolver?.unregisterContentObserver(mBrightnessObserver)}private fun setListener() {seekBar.setOnSeekBarChangeListener(object : SeekBar.OnSeekBarChangeListener {override fun onProgressChanged(seekBar: SeekBar?, progress: Int, fromUser: Boolean) {Log.i(onProgressChanged----, progress)mScreenBrightness progress * ratio//判断是否有修改系统设置权限if (Settings.System.canWrite(thisBrightnessActivity)) {setScreenBrightness(mScreenBrightness)updateNum(mScreenBrightness)} else {Toast.makeText(thisBrightnessActivity, 没有修改权限, Toast.LENGTH_SHORT).show()// 打开允许修改系统设置权限的页面val intent Intent(Settings.ACTION_MANAGE_WRITE_SETTINGS, Uri.parse(package:$packageName))startActivityForResult(intent, mRequestCode)}}override fun onStartTrackingTouch(seekBar: SeekBar?) {}override fun onStopTrackingTouch(seekBar: SeekBar?) {}})}/*** 处理返回结果*/override fun onActivityResult(requestCode: Int, resultCode: Int, data: Intent?) {super.onActivityResult(requestCode, resultCode, data)if (requestCode mRequestCode) {if (Settings.System.canWrite(thisBrightnessActivity)) {setScreenBrightness(mScreenBrightness)updateNum(mScreenBrightness)} else {Toast.makeText(thisBrightnessActivity, 拒绝了权限, Toast.LENGTH_SHORT).show()}}}/*** 更新页面显示*/private fun updateNum(mScreenBrightness: Int) {//转float 取四舍五入val i: Int (mScreenBrightness / (ratio.toFloat())).roundToInt()tv_brightness.text i.toString()seekBar.progress i}/*** 获取系统屏幕亮度(0-255)*/private fun getScreenBrightness(): Int {try {return Settings.System.getInt(this.contentResolver, Settings.System.SCREEN_BRIGHTNESS)} catch (e: SettingNotFoundException) {e.printStackTrace()}return 0}/*** 设置系统屏幕亮度影响所有页面和app* 注意这种方式是需要手动权限的android.permission.WRITE_SETTINGS*/private fun setScreenBrightness(brightness: Int) {try {//先检测调节模式setScreenManualMode()//再设置Settings.System.putInt(this.contentResolver, Settings.System.SCREEN_BRIGHTNESS, brightness)} catch (e: SettingNotFoundException) {e.printStackTrace()}}/*** 设置系统亮度调节模式(SCREEN_BRIGHTNESS_MODE)* SCREEN_BRIGHTNESS_MODE_MANUAL 手动调节* SCREEN_BRIGHTNESS_MODE_AUTOMATIC 自动调节*/private fun setScreenManualMode() {try {//获取当前系统亮度调节模式val mode Settings.System.getInt(this.contentResolver, Settings.System.SCREEN_BRIGHTNESS_MODE)//如果是自动则改为手动if (mode Settings.System.SCREEN_BRIGHTNESS_MODE_AUTOMATIC) {Settings.System.putInt(this.contentResolver,Settings.System.SCREEN_BRIGHTNESS_MODE,Settings.System.SCREEN_BRIGHTNESS_MODE_MANUAL)}} catch (e: SettingNotFoundException) {e.printStackTrace()}}/*** 设置当前应用屏幕亮度只当前有效*/private fun setWindowBrightness(brightness: Int) {val window windowval lp window.attributeslp.screenBrightness brightness / 255.0fwindow.attributes lp}
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