android 手機後台播音樂，設置鬧鐘，打一通電話，掛斷電話後，鬧鐘與音樂同時響起

修改：

frameworks\base\media\java\android\media\MediaFocusControl.java：

1、import packages：

import com.android.internal.telephony.ITelephony;

import android.os.ServiceManager;

2、增加獲取當前Phone Call State的方法getPhoneCallState()：

private int getPhoneCallState(){

int phoneCallState = TelephonyManager.CALL_STATE_IDLE;

TelephonyManager telephonyManager = (TelephonyManager)mContext.getSystemService(Context.TELEPHONY_SERVICE);

ITelephony telephonyService = ITelephony.Stub.asInterface(ServiceManager.getService(Context.TELEPHONY_SERVICE));

if (telephonyService != null) {

Log.w(TAG, "getPhoneCallState: mTelephonyService != null");

try {

phoneCallState = telephonyService.getPreciseCallState();

Log.w(TAG, "getPhoneCallState: telephonyService.getPreciseCallState() = " + phoneCallState);

} catch (RemoteException ex) {

if(telephonyManager != null){

phoneCallState = telephonyManager.getCallState();

Log.w(TAG, "getPhoneCallState: telephonyManager.getCallState() = " + phoneCallState);

}

Log.w(TAG, "Catch exception when getPreciseCallState: ex = "

+ ex.getMessage());

}

} else {

Log.w(TAG, "getPhoneCallState: telephonyService == null");

if(telephonyManager != null){

phoneCallState = telephonyManager.getCallState();

Log.w(TAG, "getPhoneCallState: telephonyManager.getCallState() = " + phoneCallState);

}

}

Log.w(TAG, "getPhoneCallState: phoneCallState = " + phoneCallState);

return phoneCallState;

}

3、修改

private boolean canReassignAudioFocus() {

// focus requests are rejected during a phone call or when the phone is ringing

// this is equivalent to IN_VOICE_COMM_FOCUS_ID having the focus

if (!mFocusStack.isEmpty() && mFocusStack.peek().hasSameClient(IN_VOICE_COMM_FOCUS_ID)) {

return false;

}

return true;

}

為

private boolean canReassignAudioFocus() {

// focus requests are rejected during a phone call or when the phone is ringing

// this is equivalent to IN_VOICE_COMM_FOCUS_ID having the focus

if (!mFocusStack.isEmpty() && mFocusStack.peek().hasSameClient(IN_VOICE_COMM_FOCUS_ID) && (getPhoneCallState() != TelephonyManager.CALL_STATE_IDLE)) {

Log.w(TAG, "canReassignAudioFocus: return false");

return false;

}

Log.w(TAG, "canReassignAudioFocus: return true");

return true;

}