delphi XE5 Android应用程序获取电池信息

如何在Delphi XE5的Android应用程序中获取电池信息。

使用android.os.BatteryManager类获取Android电池信息。

将android.os.BatteryManager类移植到Delphi。

uses Androidapi.JNI.JavaTypes,

Androidapi.JNIBridge;

type

JBatteryManagerClass = interface(JObjectClass)

['{739F38F8-E2A2-4016-8739-3F073A0E3E60}'] // CTRL+SHIFT+G

function _GetBATTERY_HEALTH_COLD: Integer;

function _GetBATTERY_HEALTH_DEAD: Integer;

function _GetBATTERY_HEALTH_GOOD: Integer;

function _GetBATTERY_HEALTH_OVERHEAT: Integer;

function _GetBATTERY_HEALTH_OVER_VOLTAGE: Integer;

function _GetBATTERY_HEALTH_UNKNOWN: Integer;

function _GetBATTERY_HEALTH_UNSPECIFIED_FAILURE: Integer;

function _GetBATTERY_PLUGGED_AC: Integer;

function _GetBATTERY_PLUGGED_USB: Integer;

function _GetBATTERY_PLUGGED_WIRELESS: Integer;

function _GetBATTERY_STATUS_CHARGING: Integer;

function _GetBATTERY_STATUS_DISCHARGING: Integer;

function _GetBATTERY_STATUS_FULL: Integer;

function _GetBATTERY_STATUS_NOT_CHARGING: Integer;

function _GetBATTERY_STATUS_UNKNOWN: Integer;

function _GetEXTRA_HEALTH: JString;

function _GetEXTRA_ICON_SMALL: JString;

function _GetEXTRA_LEVEL: JString;

function _GetEXTRA_PLUGGED: JString;

function _GetEXTRA_PRESENT: JString;

function _GetEXTRA_SCALE: JString;

function _GetEXTRA_STATUS: JString;

function _GetEXTRA_TECHNOLOGY: JString;

function _GetEXTRA_TEMPERATURE: JString;

function _GetEXTRA_VOLTAGE: JString;

property BATTERY_HEALTH_COLD: Integer read _GetBATTERY_HEALTH_COLD;

property BATTERY_HEALTH_DEAD: Integer read _GetBATTERY_HEALTH_DEAD;

property BATTERY_HEALTH_GOOD: Integer read _GetBATTERY_HEALTH_GOOD;

property BATTERY_HEALTH_OVERHEAT: Integer read _GetBATTERY_HEALTH_OVERHEAT;

property BATTERY_HEALTH_OVER_VOLTAGE: Integer

read _GetBATTERY_HEALTH_OVER_VOLTAGE;

property BATTERY_HEALTH_UNKNOWN: Integer read _GetBATTERY_HEALTH_UNKNOWN;

property BATTERY_HEALTH_UNSPECIFIED_FAILURE: Integer

read _GetBATTERY_HEALTH_UNSPECIFIED_FAILURE;

property BATTERY_PLUGGED_AC: Integer read _GetBATTERY_PLUGGED_AC;

property BATTERY_PLUGGED_USB: Integer read _GetBATTERY_PLUGGED_USB;

property BATTERY_PLUGGED_WIRELESS: Integer

read _GetBATTERY_PLUGGED_WIRELESS;

property BATTERY_STATUS_CHARGING: Integer read _GetBATTERY_STATUS_CHARGING;

property BATTERY_STATUS_DISCHARGING: Integer

read _GetBATTERY_STATUS_DISCHARGING;

property BATTERY_STATUS_FULL: Integer read _GetBATTERY_STATUS_FULL;

property BATTERY_STATUS_NOT_CHARGING: Integer

read _GetBATTERY_STATUS_NOT_CHARGING;

property BATTERY_STATUS_UNKNOWN: Integer read _GetBATTERY_STATUS_UNKNOWN;

property EXTRA_HEALTH: JString read _GetEXTRA_HEALTH;

property EXTRA_HEALTHEXTRA_HEALTHEXTRA_ICON_SMALL: JString

read _GetEXTRA_ICON_SMALL;

property EXTRA_LEVEL: JString read _GetEXTRA_LEVEL;

property EXTRA_PLUGGED: JString read _GetEXTRA_PLUGGED;

property EXTRA_PRESENT: JString read _GetEXTRA_PRESENT;

property EXTRA_SCALE: JString read _GetEXTRA_SCALE;

property EXTRA_STATUS: JString read _GetEXTRA_STATUS;

property EXTRA_TECHNOLOGY: JString read _GetEXTRA_TECHNOLOGY;

property EXTRA_TEMPERATURE: JString read _GetEXTRA_TEMPERATURE;

property EXTRA_VOLTAGE: JString read _GetEXTRA_VOLTAGE;

end;

[JavaSignature('android/os/BatteryManager')]

JBatteryManager = interface(JObject)

['{73085A7C-18A7-4295-A0E2-A7B7D2C0EACB}'] // CTRL+SHIFT+G

end;

TJBatteryManager = class(TJavaGenericImport

JBatteryManager>)

end;

在窗体上放置一个按钮（TButton）和一个注释（TMemo）。

001

为按钮添加一个OnClick事件。

uses Androidapi.JNI.JavaTypes,

Androidapi.JNIBridge,

FMX.Platform.Android,

Androidapi.JNI.GraphicsContentViewText;

procedure TForm1.Button1Click(Sender: TObject);

var

Filter: JIntentFilter;

Battery: JIntent;

Status, Health, Level, Scale, IconSmall, Plugged, Voltage,

Temperature: Integer;

Present: Boolean;

Technology, StatusString, HealthString, ScString: string;

begin

Filter := TJIntentFilter.JavaClass.init

(TJIntent.JavaClass.ACTION_BATTERY_CHANGED);

Battery := MainActivity.registerReceiver(nil, Filter);

Status := Battery.getIntExtra(StringToJString('status'), 0);

Health := Battery.getIntExtra(StringToJString('health'), 0);

Present := Battery.getBooleanExtra(StringToJString('present'), false);

Level := Battery.getIntExtra(StringToJString('level'), 0);

Scale := Battery.getIntExtra(StringToJString('scale'), 0);

IconSmall := Battery.getIntExtra(StringToJString('icon-small'), 0);

Plugged := Battery.getIntExtra(StringToJString('plugged'), 0);

Voltage := Battery.getIntExtra(StringToJString('voltage'), 0);

Temperature := Battery.getIntExtra(StringToJString('temperature'), 0);

Technology := JStringToString

(Battery.getStringExtra(StringToJString('technology')));

StatusString := '';

if Status = TJBatteryManager.JavaClass.BATTERY_STATUS_UNKNOWN then

StatusString := 'UNKNOWN'

else if Status = TJBatteryManager.JavaClass.BATTERY_STATUS_CHARGING then

StatusString := 'CHARGING'

else if Status = TJBatteryManager.JavaClass.BATTERY_STATUS_DISCHARGING then

StatusString := 'DISCHARGING'

else if Status = TJBatteryManager.JavaClass.BATTERY_STATUS_NOT_CHARGING then

StatusString := 'NOT CHARGING'

else if Status = TJBatteryManager.JavaClass.BATTERY_STATUS_FULL then

StatusString := 'FULL';

HealthString := '';

if Health = TJBatteryManager.JavaClass.BATTERY_HEALTH_UNKNOWN then

HealthString := 'UNKNOWN'

else if Health = TJBatteryManager.JavaClass.BATTERY_HEALTH_GOOD then

HealthString := 'GOOD'

else if Health = TJBatteryManager.JavaClass.BATTERY_HEALTH_OVERHEAT then

HealthString := 'OVERHEAT'

else if Health = TJBatteryManager.JavaClass.BATTERY_HEALTH_DEAD then

HealthString := 'DEAD'

else if Health = TJBatteryManager.JavaClass.BATTERY_HEALTH_OVER_VOLTAGE then

HealthString := 'OVER VOLTAGE'

else if Health = TJBatteryManager.JavaClass.BATTERY_HEALTH_UNSPECIFIED_FAILURE

then

HealthString := 'UNSPECIFIED FAILURE';

ScString := '';

if Plugged = TJBatteryManager.JavaClass.BATTERY_PLUGGED_AC then

ScString := 'AC'

else if Plugged = TJBatteryManager.JavaClass.BATTERY_PLUGGED_USB then

ScString := 'USB';

Memo1.Lines.Clear;

Memo1.Lines.Add(Format('%s=%s', ['Status(充電状態)', StatusString]));

Memo1.Lines.Add(Format('%s=%s', ['Health(电池状态)', HealthString]));

Memo1.Lines.Add(Format('%s=%s', ['Present(是否存在电池)',

BoolToStr(Present, True)]));

Memo1.Lines.Add(Format('%s=%d', ['Level(电池余量)', Level]));

Memo1.Lines.Add(Format('%s=%d', ['Scale(最大电池余量)', Scale]));

Memo1.Lines.Add(Format('%s=%d', ['Icon Small', IconSmall]));

Memo1.Lines.Add(Format('%s=%s', ['Plugged(AC or USB)', ScString]));

Memo1.Lines.Add(Format('%s=%d', ['Voltage(电池电压)', Voltage]));

Memo1.Lines.Add(Format('%s=%d', ['Temperature(电池电压)', Temperature]));

Memo1.Lines.Add(Format('%s=%s', ['Technology', Technology]));

end;

运行该应用程序，然后按按钮以显示电池信息。

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