1 原理解读
本质上要解决两个问题:
- 设置默认ADB enable为真,android的user版本中也默认为真,即使之有效。
- 一般android设备连接电脑PC后会出现USB连接的弹框,去掉弹框直接生效。
2 修改方案(Android Q R S)
设置默认ADB Enable为真,android的user版本中也默认为真
文件 AOSP/frameworks/base/services/core/java/com/android/server/adb/AdbService.java
在该文件的systemReady中修改
java
/**
* Called in response to {@code SystemService.PHASE_ACTIVITY_MANAGER_READY} from {@code
* SystemServer}.
*/
public void systemReady() {
if (DEBUG) Slog.d(TAG, "systemReady");
// make sure the ADB_ENABLED setting value matches the current state
try {
//这里不管mIsAdbUsbEnabled是否为真,强制设定属性Settings.Global.ADB_ENABLED为1
Settings.Global.putInt(mContentResolver,
- Settings.Global.ADB_ENABLED, mIsAdbUsbEnabled ? 1 : 0);
+ Settings.Global.ADB_ENABLED, 1);
Settings.Global.putInt(mContentResolver,
Settings.Global.ADB_WIFI_ENABLED, mIsAdbWifiEnabled ? 1 : 0);
} catch (SecurityException e) {
// If UserManager.DISALLOW_DEBUGGING_FEATURES is on, that this setting can't be changed.
Slog.d(TAG, "ADB_ENABLED is restricted.");
}
}
修改文件AOSP/frameworks/base/packages/SystemUI/src/com/android/systemui/usb/UsbDebuggingActivity.java,一般android设备连接电脑PC后会出现USB连接的弹框,这里的修改主要是不弹框并直接连接成功,代码修改如下:
java
public class UsbDebuggingActivity extends AlertActivity
implements DialogInterface.OnClickListener {
//...
@Override
public void onCreate(Bundle icicle) {
Window window = getWindow();
window.addSystemFlags(
WindowManager.LayoutParams.SYSTEM_FLAG_HIDE_NON_SYSTEM_OVERLAY_WINDOWS);
window.setType(WindowManager.LayoutParams.TYPE_SYSTEM_DIALOG);
super.onCreate(icicle);
// Emulator does not support reseating the usb cable to reshow the dialog.
boolean isEmulator = SystemProperties.get("ro.boot.qemu").equals("1");
if (SystemProperties.getInt("service.adb.tcp.port", 0) == 0 && !isEmulator) {
mDisconnectedReceiver = new UsbDisconnectedReceiver(this);
IntentFilter filter = new IntentFilter(UsbManager.ACTION_USB_STATE);
mBroadcastDispatcher.registerReceiver(mDisconnectedReceiver, filter);
}
Intent intent = getIntent();
String fingerprints = intent.getStringExtra("fingerprints");
mKey = intent.getStringExtra("key");
if (fingerprints == null || mKey == null) {
finish();
return;
}
+ try {
+ IBinder b = ServiceManager.getService(ADB_SERVICE);
+ IAdbManager service = IAdbManager.Stub.asInterface(b);
+ service.allowDebugging(true, mKey);
+ finish();
+ } catch (Exception e) {
+ Log.e(TAG, "Unable to notify Usb service", e);
+ }
final AlertController.AlertParams ap = mAlertParams;
ap.mTitle = getString(R.string.usb_debugging_title);
ap.mMessage = getString(R.string.usb_debugging_message, fingerprints);
ap.mPositiveButtonText = getString(R.string.usb_debugging_allow);
ap.mNegativeButtonText = getString(android.R.string.cancel);
ap.mPositiveButtonListener = this;
ap.mNegativeButtonListener = this;
// add "always allow" checkbox
LayoutInflater inflater = LayoutInflater.from(ap.mContext);
View checkbox = inflater.inflate(com.android.internal.R.layout.always_use_checkbox, null);
mAlwaysAllow = (CheckBox)checkbox.findViewById(com.android.internal.R.id.alwaysUse);
mAlwaysAllow.setText(getString(R.string.usb_debugging_always));
ap.mView = checkbox;
window.setCloseOnTouchOutside(false);
setupAlert();
}
//...
}