檢測電池充電Android

Question

我在程序中拒絕來電。 「呼叫拒絕」和「sendSMS」正常工作， 但我只想在電話處於充電模式時拒絕來電。

我試圖執行以下代碼：

case TelephonyManager.CALL_STATE_RINGING: 

     if (isCharging()) 
     { 
      reject(); 
      sendSMS(incomingNumber); 
     } 

    break; 

isCharging：

public boolean isCharging() 
{ 
    IntentFilter ifilter = new IntentFilter(Intent.ACTION_BATTERY_CHANGED); 
    Intent batteryStatus = contextMember.registerReceiver(null, ifilter); 
    int status = batteryStatus.getIntExtra(BatteryManager.EXTRA_STATUS, -1); 
    boolean bCharging = status == BatteryManager.BATTERY_STATUS_CHARGING || 
         status == BatteryManager.BATTERY_STATUS_FULL; 
    return bCharging; 
} 

但應用程序可以使破碎的來電。

請幫我弄清楚這一點！

我收到的logcat的以下錯誤：

E/AndroidRuntime(11160): FATAL EXCEPTION: main 
    E/AndroidRuntime(11160): android.content.ReceiverCallNotAllowedException:   IntentReceiver components are not allowed to register to receive intents 
    E/AndroidRuntime(11160): at  android.app.ReceiverRestrictedContext.registerReceiver(ContextImpl.java:163) 
    E/AndroidRuntime(11160): at android.app.ReceiverRestrictedContext.registerReceiver(ContextImpl.java:157) 
    E/AndroidRuntime(11160): at com.SmartDialer_app.SmartDialer.MyPhoneStateListener.isCharging(MyPhoneStateListener.java:106) 
    E/AndroidRuntime(11160): at com.SmartDialer_app.SmartDialer.MyPhoneStateListener.onCallStateChanged(MyPhoneStateListene r.java:57) 
    E/AndroidRuntime(11160): at android.telephony.PhoneStateListener$2.handleMessage(PhoneStateListener.java:393) 
    E/AndroidRuntime(11160): at android.os.Handler.dispatchMessage(Handler.java:99) 
    E/AndroidRuntime(11160): at android.os.Looper.loop(Looper.java:137) 
    E/AndroidRuntime(11160): at android.app.ActivityThread.main(ActivityThread.java:4898) 
    E/AndroidRuntime(11160): at java.lang.reflect.Method.invokeNative(Native Method) 
    E/AndroidRuntime(11160): at java.lang.reflect.Method.invoke(Method.java:511) 
    E/AndroidRuntime(11160): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1006) 
    E/AndroidRuntime(11160): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:773) 
    E/AndroidRuntime(11160): at dalvik.system.NativeStart.main(Native Method) 
    E/AndroidRuntime(11160): FATAL EXCEPTION: main 
    E/AndroidRuntime(11160): android.content.ReceiverCallNotAllowedException: IntentReceiver components are not allowed to register to receive intents 
    E/AndroidRuntime(11160): at android.app.ReceiverRestrictedContext.registerReceiver(ContextImpl.java:163) 
    E/AndroidRuntime(11160): at android.app.ReceiverRestrictedContext.registerReceiver(ContextImpl.java:157) 
    E/AndroidRuntime(11160): at com.SmartDialer_app.SmartDialer.MyPhoneStateListener.isCharging(MyPhoneStateListener.java:1 06) 
    E/AndroidRuntime(11160): at com.SmartDialer_app.SmartDialer.MyPhoneStateListener.onCallStateChanged(MyPhoneStateListener.java:57) 
    E/AndroidRuntime(11160): at android.telephony.PhoneStateListener$2.handleMessage(PhoneStateListener.java:393) 
    E/AndroidRuntime(11160): at android.os.Handler.dispatchMessage(Handler.java:99) 
    E/AndroidRuntime(11160): at android.os.Looper.loop(Looper.java:137) 
    E/AndroidRuntime(11160): at android.app.ActivityThread.main(ActivityThread.java:4898) 
    E/AndroidRuntime(11160): at java.lang.reflect.Method.invokeNative(Native Method) 
    E/AndroidRuntime(11160): at java.lang.reflect.Method.invoke(Method.java:511) 
    E/AndroidRuntime(11160): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1006) 
    E/AndroidRuntime(11160): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:773) 
E/AndroidRuntime(11160): at dalvik.system.NativeStart.main(Native Method) 

謝謝。

Answer 1

你isCharging()方法可能正在從BroadcastReceiver的onReceive()調用。在這種情況下，您不能直接撥打registerReceiver()，即使是null的第一個參數。

相反的：

Intent batteryStatus = contextMember.registerReceiver(null, ifilter); 

嘗試：

Intent batteryStatus = contextMember.getApplicationContext().registerReceiver(null, ifilter); 

更多背景信息，請參閱this blog post。

Answer 2

在您的活動中，創建一個新的BroadcastReceiver實例或擴展它的類實例。同時創建您的IntentFilter和意圖被過濾。然後在您的活動中，覆蓋onReceive()並在活動收到相應的意圖時添加您想要執行的任何操作。

您可以在onResume()中實例化接收器類，並在onPause()中取消其註冊。

事情是這樣的：

public class YourAc extends Activity{ 
BroadcastReceiver br; 
@Override 
public void onResume(){ 
    //instantiate your intent filter and other related stuff here 
    //register the receiver 
} 
@Override 
public void onPause(){ 
    //unregister your receiver 
} 
@Override 
public void onReceive(){ 
    //change the boolean isCharging to false 
} 
} 

Answer 3

添加permisions你Manifiest文件

<receiver android:name=".PowerConnectionReceiver"> 
    <intent-filter> 
    <action android:name="android.intent.action.ACTION_POWER_CONNECTED"/> 
    <action android:name="android.intent.action.ACTION_POWER_DISCONNECTED"/> 
    </intent-filter> 
</receiver> 

在你的類添加該代碼，你可以設置一個varible標誌isCharging和檢查被設置好的。 BatteryManager以包含充電狀態的粘性Intent廣播所有電池和充電細節。

充電狀態可以隨設備插入一樣方便地更改，因此監視充電狀態以更改並相應地更改刷新率非常重要。

Ref：// developer.android.com documentation。

public class PowerConnectionReceiver extends BroadcastReceiver { 
    @Override 
    public void onReceive(Context context, Intent intent) { 
     int status = intent.getIntExtra(BatteryManager.EXTRA_STATUS, -1); 
     boolean isCharging = status == BatteryManager.BATTERY_STATUS_CHARGING || 
          status == BatteryManager.BATTERY_STATUS_FULL; 


     int chargePlug = intent.getIntExtra(BatteryManager.EXTRA_PLUGGED, -1); 
     boolean usbCharge = chargePlug == BatteryManager.BATTERY_PLUGGED_USB; 
     boolean acCharge = chargePlug == BatteryManager.BATTERY_PLUGGED_AC; 
     //remove some variables if you don't need it. 
    } 
}