Android獲取手機(jī)電量

當(dāng)手機(jī)電量發(fā)生改變時(shí)，系統(tǒng)會(huì)對(duì)外發(fā)送Intent的Action 為**ACTION_BATTERY_CHANGED**常量廣播。
當(dāng)手機(jī)電量過(guò)低時(shí),系統(tǒng)會(huì)發(fā)送Intent的Action為**ACTION_BATTERY_LOW**常量的廣播。
所以可以通過(guò)開(kāi)發(fā)監(jiān)聽(tīng)對(duì)應(yīng)的Itent的BroadcastReceiver.

以下為實(shí)現(xiàn)代碼

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public class MainActivity extends AppCompatActivity {private TextView tv;/*** 廣播接受者*/class BatteryReceiver extends BroadcastReceiver {@Overridepublic void onReceive(Context context, Intent intent) { // TODO Auto-generated method stub //判斷它是否是為電量變化的Broadcast Actionif (Intent.ACTION_BATTERY_CHANGED.equals(intent.getAction())) { //獲取當(dāng)前電量int level = intent.getIntExtra("level", 0); //電量的總刻度int scale = intent.getIntExtra("scale", 100); //把它轉(zhuǎn)成百分比tv.setText("電池電量為" + ((level * 100) / scale) + "%");}}}@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState); //setContentView(R.layout.activity_main);tv = new TextView(this);tv.setText("chrp");this.setContentView(tv);//注冊(cè)廣播接受者java代碼IntentFilter intentFilter = new IntentFilter(Intent.ACTION_BATTERY_CHANGED); //創(chuàng)建廣播接受者對(duì)象BatteryReceiver batteryReceiver = new BatteryReceiver();//注冊(cè)receiverregisterReceiver(batteryReceiver, intentFilter);} }

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