1、Battery类：
import android.app.Activity; import android.content.Context; import android.content.Intent; import android.content.IntentFilter; import android.net.ConnectivityManager; import android.net.NetworkInfo; import android.net.Uri; import android.os.BatteryManager; import android.os.Build; import android.os.PowerManager; import android.provider.Settings; public class Battery { //电量优化白名单 public static void addWhite(Activity activity){ PowerManager packageManager = (PowerManager) activity.getSystemService(Context.POWER_SERVICE); //应用是否在 白名单中 if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) { if (!packageManager.isIgnoringBatteryOptimizations(activity.getPackageName())){ //方法1、启动一个 ACTION_IGNORE_BATTERY_OPTIMIZATION_SETTINGS Intent // Intent intent = new Intent(Settings.ACTION_IGNORE_BATTERY_OPTIMIZATION_SETTINGS); // activity.startActivity(intent); //方法2、触发系统对话框 Intent intent = new Intent(Settings.ACTION_REQUEST_IGNORE_BATTERY_OPTIMIZATIONS); intent.setData(Uri.parse("package:"+activity.getPackageName())); activity.startActivity(intent); } } } /** * 是否正在充电 * @return */ public static boolean isPlugged(Context context){ //发送个包含充电状态的广播，并且是一个持续的广播 IntentFilter filter = new IntentFilter(Intent.ACTION_BATTERY_CHANGED); Intent intent = context.registerReceiver(null,filter); //获取充电状态 int isPlugged = intent.getIntExtra(BatteryManager.EXTRA_PLUGGED, -1); boolean acPlugged = isPlugged == BatteryManager.BATTERY_PLUGGED_AC; boolean usbPlugged = isPlugged == BatteryManager.BATTERY_PLUGGED_USB; boolean wifiPlugged = isPlugged == BatteryManager.BATTERY_PLUGGED_WIRELESS; return acPlugged || usbPlugged || wifiPlugged; } /** * 是否正在使用wifi * @param context * @return */ public static boolean isWifi(Context context){ ConnectivityManager cm = (ConnectivityManager) context. getSystemService(Context.CONNECTIVITY_SERVICE); //获得当前活动的网络信息 NetworkInfo activeNetworkInfo = cm.getActiveNetworkInfo(); if (null != activeNetworkInfo && activeNetworkInfo.isConnected() && activeNetworkInfo.getType() == ConnectivityManager.TYPE_WIFI){ return true; } return false; } }2、被动获取wifi
import android.content.BroadcastReceiver; import android.content.Context; import android.content.Intent; import android.util.Log; import android.widget.Toast; /** * 被动获取是否wifi */ public class WifiConnectionReceiver extends BroadcastReceiver { @Override public void onReceive(Context context, Intent intent) { if (Battery.isWifi(context)){ Log.i("WIFI","当前正在使用wifi"); Toast.makeText(context,"当前正在使用wifi",Toast.LENGTH_SHORT).show(); } else{ Log.i("WIFI","当前不正在使用wifi"); Toast.makeText(context,"当前不在使用wifi",Toast.LENGTH_SHORT).show(); } } }3、被动接受充电状态
import android.content.BroadcastReceiver; import android.content.Context; import android.content.Intent; import android.text.TextUtils; import android.widget.Toast; /** * 被动接收充电状态 */ public class PowerConnectionReceiver extends BroadcastReceiver { @Override public void onReceive(Context context, Intent intent) { String action = intent.getAction(); if (TextUtils.equals(action,Intent.ACTION_POWER_CONNECTED)){ Toast.makeText(context,"当前正在充电",Toast.LENGTH_SHORT).show(); } else if(TextUtils.equals(action,Intent.ACTION_POWER_DISCONNECTED)){ Toast.makeText(context,"当前不在充电",Toast.LENGTH_SHORT).show(); } } }4、有关电量优化相关的处理，比如地图定位，发送定位信息等示例，参考性能优化第9章节视频，
相关的 JobScheduler定时任务处理等等。
