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1. 开发者模式中弹框“一律允许使用这台计算机进行调试”
此弹框为Activity， 所要打开的Activity为：
/frameworks/base/core/res/res/values/config.xml
<string name="config_customAdbPublicKeyConfirmationComponent"
>com.android.systemui/com.android.systemui.usb.UsbDebuggingActivity</string>
2. 在该Activity 点击确认时
@Override
public void onClick(DialogInterface dialog, int which) {
boolean allow = (which == AlertDialog.BUTTON_POSITIVE);
boolean alwaysAllow = allow && mAlwaysAllow.isChecked();
try {
IBinder b = ServiceManager.getService(USB_SERVICE);
IUsbManager service = IUsbManager.Stub.asInterface(b);
if (allow) {
service.allowUsbDebugging(alwaysAllow, mKey);
} else {
service.denyUsbDebugging();
}
} catch (Exception e) {
Log.e(TAG, "Unable to notify Usb service", e);
}
finish();
}
UsbService.allowUsbDebugging() ->UsbDeviceManager.allowUsbDebugging() ->UsbDebuggingManager.allowUsbDebugging() | 
转播
