Android MediaProjection录屏权限处理

MediaProjection服务在SystemServiceRegistry的静态块里面注册的

@frameworks/base/core/java/android/app/SystemServiceRegistry.java
public final class SystemServiceRegistry {private static final String TAG = "SystemServiceRegistry";/** @hide */public static boolean sEnableServiceNotFoundWtf = false;private static int sServiceCacheSize;private static volatile boolean sInitializing;// Not instantiable.private SystemServiceRegistry() { }static {registerService(Context.MEDIA_PROJECTION_SERVICE, MediaProjectionManager.class,

申请屏幕录制权限通过启动com.android.systemui/.media.MediaProjectionPermissionActivity来获取权限

requestScreenRecordPermissionIntent captureIntent = u3dClient.createScreenCaptureIntent();this.mProjectionManager.createScreenCaptureIntent();  //Intent { cmp=com.android.systemui/.media.MediaProjectionPermissionActivity } packagename=com.android.systemuistartActivityForResult(captureIntent, LOCAL_REQUEST_CODE);

@@frameworks/base/packages/SystemUI/src/com/android/systemui/media/MediaProjectionPermissionActivity.java/** Copyright (C) 2014 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.media;import static android.view.WindowManager.LayoutParams.SYSTEM_FLAG_HIDE_NON_SYSTEM_OVERLAY_WINDOWS;import android.app.Activity;
import android.app.AlertDialog;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.pm.ApplicationInfo;
import android.content.pm.PackageManager;
import android.graphics.Typeface;
import android.media.projection.IMediaProjection;
import android.media.projection.IMediaProjectionManager;
import android.media.projection.MediaProjectionManager;
import android.os.Bundle;
import android.os.IBinder;
import android.os.RemoteException;
import android.os.ServiceManager;
import android.text.BidiFormatter;
import android.text.SpannableString;
import android.text.TextPaint;
import android.text.TextUtils;
import android.text.style.StyleSpan;
import android.util.Log;
import android.view.View;
import android.view.Window;
import android.view.WindowManager;
import android.widget.TextView;import com.android.systemui.R;
import com.android.systemui.util.Utils;public class MediaProjectionPermissionActivity extends Activityimplements DialogInterface.OnClickListener, DialogInterface.OnCancelListener {private static final String TAG = "MediaProjectionPermissionActivity";private static final float MAX_APP_NAME_SIZE_PX = 500f;private static final String ELLIPSIS = "\u2026";private String mPackageName;private int mUid;private IMediaProjectionManager mService;private AlertDialog mDialog;@Overridepublic void onCreate(Bundle icicle) {Log.e(TAG, "xww getprojectionperimssino 1");super.onCreate(icicle);mPackageName = getCallingPackage();IBinder b = ServiceManager.getService(MEDIA_PROJECTION_SERVICE);mService = IMediaProjectionManager.Stub.asInterface(b);if (mPackageName == null) {finish();Log.e(TAG, "xww getprojectionperimssino 2");return;}PackageManager packageManager = getPackageManager();ApplicationInfo aInfo;try {aInfo = packageManager.getApplicationInfo(mPackageName, 0);mUid = aInfo.uid;} catch (PackageManager.NameNotFoundException e) {Log.e(TAG, "unable to look up package name", e);finish();Log.e(TAG, "xww getprojectionperimssino 3");return;}try {if (mService.hasProjectionPermission(mUid, mPackageName)) {setResult(RESULT_OK, getMediaProjectionIntent(mUid, mPackageName));finish();Log.e(TAG, "xww getprojectionperimssino 4");return;} else {setResult(RESULT_OK, getMediaProjectionIntent(mUid, mPackageName));Log.e(TAG, "xww getprojectionperimssino 5");finish();return;}} catch (RemoteException e) {Log.e(TAG, "Error checking projection permissions", e);finish();Log.e(TAG, "xww getprojectionperimssino 6");return;}}@Overrideprotected void onDestroy() {super.onDestroy();if (mDialog != null) {mDialog.dismiss();}}@Overridepublic void onClick(DialogInterface dialog, int which) {try {if (which == AlertDialog.BUTTON_POSITIVE) {setResult(RESULT_OK, getMediaProjectionIntent(mUid, mPackageName));}} catch (RemoteException e) {Log.e(TAG, "Error granting projection permission", e);setResult(RESULT_CANCELED);} finally {if (mDialog != null) {mDialog.dismiss();}finish();}}private Intent getMediaProjectionIntent(int uid, String packageName)throws RemoteException {IMediaProjection projection = mService.createProjection(uid, packageName,MediaProjectionManager.TYPE_SCREEN_CAPTURE, false /* permanentGrant */);Intent intent = new Intent();intent.putExtra(MediaProjectionManager.EXTRA_MEDIA_PROJECTION, projection.asBinder());return intent;}@Overridepublic void onCancel(DialogInterface dialog) {finish();}
}

最后通过获取Activity的结果判断是否成功获取到屏幕录制权限

    public void onActivityResult(int requestCode, int resultCode, Intent data) {super.onActivityResult(requestCode, resultCode, data);if (resultCode ！= Activity.RESULT_CANCELED) {Log.e(TAG, "获取到屏幕录制权限----");return;}}

@@frameworks/base/packages/SystemUI/src/com/android/systemui/media/MediaProjectionPermissionActivity.java

/*
* Copyright (C) 2014 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.media;

import static android.view.WindowManager.LayoutParams.SYSTEM_FLAG_HIDE_NON_SYSTEM_OVERLAY_WINDOWS;

import android.app.Activity;
import android.app.AlertDialog;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.pm.ApplicationInfo;
import android.content.pm.PackageManager;
import android.graphics.Typeface;
import android.media.projection.IMediaProjection;
import android.media.projection.IMediaProjectionManager;
import android.media.projection.MediaProjectionManager;
import android.os.Bundle;
import android.os.IBinder;
import android.os.RemoteException;
import android.os.ServiceManager;
import android.text.BidiFormatter;
import android.text.SpannableString;
import android.text.TextPaint;
import android.text.TextUtils;
import android.text.style.StyleSpan;
import android.util.Log;
import android.view.View;
import android.view.Window;
import android.view.WindowManager;
import android.widget.TextView;

import com.android.systemui.R;
import com.android.systemui.util.Utils;

public class MediaProjectionPermissionActivity extends Activity
implements DialogInterface.OnClickListener, DialogInterface.OnCancelListener {
private static final String TAG = "MediaProjectionPermissionActivity";
private static final float MAX_APP_NAME_SIZE_PX = 500f;
private static final String ELLIPSIS = "\u2026";

private String mPackageName;
private int mUid;
private IMediaProjectionManager mService;

private AlertDialog mDialog;

@Override
public void onCreate(Bundle icicle) {

Log.e(TAG, "xww getprojectionperimssino 1");
super.onCreate(icicle);

mPackageName = getCallingPackage();
IBinder b = ServiceManager.getService(MEDIA_PROJECTION_SERVICE);
mService = IMediaProjectionManager.Stub.asInterface(b);

if (mPackageName == null) {
finish();
Log.e(TAG, "xww getprojectionperimssino 2");
return;
}

PackageManager packageManager = getPackageManager();
ApplicationInfo aInfo;
try {
aInfo = packageManager.getApplicationInfo(mPackageName, 0);
mUid = aInfo.uid;
} catch (PackageManager.NameNotFoundException e) {
Log.e(TAG, "unable to look up package name", e);
finish();
Log.e(TAG, "xww getprojectionperimssino 3");
return;
}

try {
if (mService.hasProjectionPermission(mUid, mPackageName)) {
setResult(RESULT_OK, getMediaProjectionIntent(mUid, mPackageName));
finish();
   Log.e(TAG, "xww getprojectionperimssino 4");
return;
} else {
setResult(RESULT_OK, getMediaProjectionIntent(mUid, mPackageName));
   Log.e(TAG, "xww getprojectionperimssino 5");
finish();
return;
}
} catch (RemoteException e) {
Log.e(TAG, "Error checking projection permissions", e);
finish();
   Log.e(TAG, "xww getprojectionperimssino 6");
return;
}

}

@Override
protected void onDestroy() {
super.onDestroy();
if (mDialog != null) {
mDialog.dismiss();
}
}

@Override
public void onClick(DialogInterface dialog, int which) {
try {
if (which == AlertDialog.BUTTON_POSITIVE) {
setResult(RESULT_OK, getMediaProjectionIntent(mUid, mPackageName));
}
} catch (RemoteException e) {
Log.e(TAG, "Error granting projection permission", e);
setResult(RESULT_CANCELED);
} finally {
if (mDialog != null) {
mDialog.dismiss();
}
finish();
}
}

private Intent getMediaProjectionIntent(int uid, String packageName)
throws RemoteException {
IMediaProjection projection = mService.createProjection(uid, packageName,
MediaProjectionManager.TYPE_SCREEN_CAPTURE, false /* permanentGrant */);
Intent intent = new Intent();
intent.putExtra(MediaProjectionManager.EXTRA_MEDIA_PROJECTION, projection.asBinder());
return intent;
}

@Override
public void onCancel(DialogInterface dialog) {
finish();
}
}