Android usb設(shè)備權(quán)限查詢(xún)及自動(dòng)獲取詳解流程
更新時(shí)間：2021年10月29日 11:54:58 作者：路過(guò)獨(dú)木橋??！
本篇文章介紹了我想要獲取Android系統(tǒng)usb設(shè)備使用權(quán)限時(shí)遇到的問(wèn)題，以及解決該問(wèn)題的過(guò)程及思路，通讀本篇對(duì)大家的學(xué)習(xí)或工作具有一定的價(jià)值，需要的朋友可以參考下
看到當(dāng)上面的對(duì)話(huà)框彈出時(shí)，可以使用命令查看頂層的活動(dòng)窗口
adb shell dumpsys window | findstr mCurrentFocus
mCurrentFocus=Window{41ab0ee0 u0 com.android.systemui/com.android.systemui.usb.UsbPermissionActivity}
這就是應(yīng)用的位置，當(dāng)然我們也可以是用grep命令來(lái)查找這個(gè)對(duì)話(huà)框的.xml文件，進(jìn)入android源碼然后輸入命令：
grep '默認(rèn)情況下用于' ./ -Rn ./SystemUI/res/values-zh-rCN/strings.xml:51: <string name="always_use_device" msgid="1450287437017315906">"默認(rèn)情況下用于該 USB 設(shè)備"</string> ./SystemUI/res/values-zh-rCN/strings.xml:52: <string name="always_use_accessory" msgid="1210954576979621596">"默認(rèn)情況下用于該 USB 配件"</string>
那么這個(gè)對(duì)話(huà)框的路徑在
/android/frameworks/base/packages/SystemUI/res/values-zh-rCN/strings.xml
其相關(guān)的內(nèi)容如下：
<string name="always_use_device" msgid="1450287437017315906">"默認(rèn)情況下用于該 USB 設(shè)備"</string> <string name="usb_device_permission_prompt" msgid="834698001271562057">"允許應(yīng)用“<xliff:g id="APPLICATION">%1$s</xliff:g>”訪(fǎng)問(wèn)該 USB 設(shè)備嗎？"
相關(guān)應(yīng)用路徑找到.java文件來(lái)修改，其位置在:
/android/frameworks/base/packages/SystemUI/src/com/android/systemui/usb/UsbPermissionActivity.java
這就是那個(gè)討厭的對(duì)話(huà)框?qū)?yīng)的java程序，那么來(lái)看看這個(gè)程序如下：
/*
* Copyright (C) 2011 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.android.systemui.usb;
import android.app.AlertDialog;
import android.app.PendingIntent;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.pm.ApplicationInfo;
import android.content.pm.PackageManager;
import android.hardware.usb.IUsbManager;
import android.hardware.usb.UsbAccessory;
import android.hardware.usb.UsbDevice;
import android.hardware.usb.UsbManager;
import android.os.Bundle;
import android.os.IBinder;
import android.os.RemoteException;
import android.os.ServiceManager;
import android.os.UserHandle;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.widget.CheckBox;
import android.widget.CompoundButton;
import android.widget.TextView;
import com.android.internal.app.AlertActivity;
import com.android.internal.app.AlertController;
import com.android.systemui.R;
public class UsbPermissionActivity extends AlertActivity
implements DialogInterface.OnClickListener, CheckBox.OnCheckedChangeListener {
private static final String TAG = "UsbPermissionActivity";
private CheckBox mAlwaysUse;
private TextView mClearDefaultHint;
private UsbDevice mDevice;
private UsbAccessory mAccessory;
private PendingIntent mPendingIntent;
private String mPackageName;
private int mUid;
private boolean mPermissionGranted;
private UsbDisconnectedReceiver mDisconnectedReceiver;
@Override
public void onCreate(Bundle icicle) {
super.onCreate(icicle);
Intent intent = getIntent();
mDevice = (UsbDevice)intent.getParcelableExtra(UsbManager.EXTRA_DEVICE);
mAccessory = (UsbAccessory)intent.getParcelableExtra(UsbManager.EXTRA_ACCESSORY);
mPendingIntent = (PendingIntent)intent.getParcelableExtra(Intent.EXTRA_INTENT);
mUid = intent.getIntExtra(Intent.EXTRA_UID, -1);
mPackageName = intent.getStringExtra("package");
Log.e(TAG, "mPackageName "+ mPackageName);
Log.e(TAG, "mUid "+ mUid);
PackageManager packageManager = getPackageManager();
ApplicationInfo aInfo;
try {
aInfo = packageManager.getApplicationInfo(mPackageName, 0);
} catch (PackageManager.NameNotFoundException e) {
Log.e(TAG, "unable to look up package name", e);
finish();
return;
}
String appName = aInfo.loadLabel(packageManager).toString();
Log.e(TAG, "appName "+ appName);
final AlertController.AlertParams ap = mAlertParams;
ap.mIcon = aInfo.loadIcon(packageManager);
ap.mTitle = appName;
if (mDevice == null) {
ap.mMessage = getString(R.string.usb_accessory_permission_prompt, appName);
mDisconnectedReceiver = new UsbDisconnectedReceiver(this, mAccessory);
} else {
ap.mMessage = getString(R.string.usb_device_permission_prompt, appName);
mDisconnectedReceiver = new UsbDisconnectedReceiver(this, mDevice);
}
ap.mPositiveButtonText = getString(android.R.string.ok);
ap.mNegativeButtonText = getString(android.R.string.cancel);
ap.mPositiveButtonListener = this;
ap.mNegativeButtonListener = this;
// add "always use" checkbox
LayoutInflater inflater = (LayoutInflater)getSystemService(
Context.LAYOUT_INFLATER_SERVICE);
ap.mView = inflater.inflate(com.android.internal.R.layout.always_use_checkbox, null);
mAlwaysUse = (CheckBox)ap.mView.findViewById(com.android.internal.R.id.alwaysUse);
if (mDevice == null) {
mAlwaysUse.setText(R.string.always_use_accessory);
} else {
mAlwaysUse.setText(R.string.always_use_device);
}
mAlwaysUse.setOnCheckedChangeListener(this);
mClearDefaultHint = (TextView)ap.mView.findViewById(
com.android.internal.R.id.clearDefaultHint);
mClearDefaultHint.setVisibility(View.GONE);
if(!mPackageName.equals("com.zqc.usbcamera"))
setupAlert();
else
{
mPermissionGranted = true;
finish();
}
}
@Override
public void onDestroy() {
IBinder b = ServiceManager.getService(USB_SERVICE);
IUsbManager service = IUsbManager.Stub.asInterface(b);
// send response via pending intent
Intent intent = new Intent();
try {
if (mDevice != null) {
intent.putExtra(UsbManager.EXTRA_DEVICE, mDevice);
if (mPermissionGranted) {
service.grantDevicePermission(mDevice, mUid);
if (mAlwaysUse.isChecked()) {
final int userId = UserHandle.getUserId(mUid);
service.setDevicePackage(mDevice, mPackageName, userId);
}
}
}
if (mAccessory != null) {
intent.putExtra(UsbManager.EXTRA_ACCESSORY, mAccessory);
if (mPermissionGranted) {
service.grantAccessoryPermission(mAccessory, mUid);
if (mAlwaysUse.isChecked()) {
final int userId = UserHandle.getUserId(mUid);
service.setAccessoryPackage(mAccessory, mPackageName, userId);
}
}
}
intent.putExtra(UsbManager.EXTRA_PERMISSION_GRANTED, mPermissionGranted);
mPendingIntent.send(this, 0, intent);
} catch (PendingIntent.CanceledException e) {
Log.w(TAG, "PendingIntent was cancelled");
} catch (RemoteException e) {
Log.e(TAG, "IUsbService connection failed", e);
}
if (mDisconnectedReceiver != null) {
unregisterReceiver(mDisconnectedReceiver);
}
super.onDestroy();
}
public void onClick(DialogInterface dialog, int which) {
if (which == AlertDialog.BUTTON_POSITIVE) {
mPermissionGranted = true;
}
finish();
}
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
if (mClearDefaultHint == null) return;
if(isChecked) {
mClearDefaultHint.setVisibility(View.VISIBLE);
} else {
mClearDefaultHint.setVisibility(View.GONE);
}
}
}
這段代碼是獲取應(yīng)用的包名，我們可以通過(guò)包名對(duì)比來(lái)決定是否彈出對(duì)話(huà)框。
final AlertController.AlertParams ap = mAlertParams;
ap.mIcon = aInfo.loadIcon(packageManager);
ap.mTitle = appName;
if (mDevice == null) {
ap.mMessage = getString(R.string.usb_accessory_permission_prompt, appName);
mDisconnectedReceiver = new UsbDisconnectedReceiver(this, mAccessory);
} else {
ap.mMessage = getString(R.string.usb_device_permission_prompt, appName);
mDisconnectedReceiver = new UsbDisconnectedReceiver(this, mDevice);
}
ap.mPositiveButtonText = getString(android.R.string.ok);
ap.mNegativeButtonText = getString(android.R.string.cancel);
ap.mPositiveButtonListener = this;
ap.mNegativeButtonListener = this;
// add "always use" checkbox
LayoutInflater inflater = (LayoutInflater)getSystemService(
Context.LAYOUT_INFLATER_SERVICE);
ap.mView = inflater.inflate(com.android.internal.R.layout.always_use_checkbox, null);
mAlwaysUse = (CheckBox)ap.mView.findViewById(com.android.internal.R.id.alwaysUse);
if (mDevice == null) {
mAlwaysUse.setText(R.string.always_use_accessory);
} else {
mAlwaysUse.setText(R.string.always_use_device);
}
mAlwaysUse.setOnCheckedChangeListener(this);
mClearDefaultHint = (TextView)ap.mView.findViewById(
com.android.internal.R.id.clearDefaultHint);
mClearDefaultHint.setVisibility(View.GONE);
在上面的代碼就是對(duì)話(huà)框了，接下來(lái)就是要修該的東西了
setupAlert();
如果不需要顯示對(duì)話(huà)框就可以這樣修改，根據(jù)包名來(lái)判斷該應(yīng)用是否彈出
if(!mPackageName.equals("包名"))
setupAlert();
else {
mPermissionGranted = true;
finish();
}
最終給該應(yīng)用授權(quán)USB設(shè)備權(quán)限的代碼，是通過(guò)調(diào)用grantDevicePermission()和grantAccessoryPermission()方法給該應(yīng)用授權(quán)USB設(shè)備權(quán)限
@Override
public void onDestroy() {
IBinder b = ServiceManager.getService(USB_SERVICE);
IUsbManager service = IUsbManager.Stub.asInterface(b);
// send response via pending intent
Intent intent = new Intent();
try {
if (mDevice != null) {
intent.putExtra(UsbManager.EXTRA_DEVICE, mDevice);
if (mPermissionGranted) {
service.grantDevicePermission(mDevice, mUid);
if (mAlwaysUse.isChecked()) {
final int userId = UserHandle.getUserId(mUid);
service.setDevicePackage(mDevice, mPackageName, userId);
}
}
}
if (mAccessory != null) {
intent.putExtra(UsbManager.EXTRA_ACCESSORY, mAccessory);
if (mPermissionGranted) {
service.grantAccessoryPermission(mAccessory, mUid);
if (mAlwaysUse.isChecked()) {
final int userId = UserHandle.getUserId(mUid);
service.setAccessoryPackage(mAccessory, mPackageName, userId);
}
}
}
intent.putExtra(UsbManager.EXTRA_PERMISSION_GRANTED, mPermissionGranted);
mPendingIntent.send(this, 0, intent);
} catch (PendingIntent.CanceledException e) {
Log.w(TAG, "PendingIntent was cancelled");
} catch (RemoteException e) {
Log.e(TAG, "IUsbService connection failed", e);
}
if (mDisconnectedReceiver != null) {
unregisterReceiver(mDisconnectedReceiver);
}
super.onDestroy();
}
日志打印
C:\Users\Android1>adb shell logcat -s UsbPermissionActivity
--------- beginning of /dev/log/system
--------- beginning of /dev/log/main
E/UsbPermissionActivity( 708): mPackageName com.test.usbcamera
E/UsbPermissionActivity( 708): mUid 10018
E/UsbPermissionActivity( 708): appName USBCamera
E/UsbPermissionActivity( 708): onDestroy() grantDevicePermission false
E/UsbPermissionActivity( 708): mPackageName com.zqc.usbcamera
E/UsbPermissionActivity( 708): mUid 10019
E/UsbPermissionActivity( 708): appName USBCamera
E/UsbPermissionActivity( 708): onDestroy() grantDevicePermission false
到此這篇關(guān)于A(yíng)ndroid usb設(shè)備權(quán)限查詢(xún)及自動(dòng)獲取詳解流程的文章就介紹到這了,更多相關(guān)Android usb設(shè)備權(quán)限 內(nèi)容請(qǐng)搜索腳本之家以前的文章或繼續(xù)瀏覽下面的相關(guān)文章希望大家以后多多支持腳本之家！
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