Android MediaProjection录屏权限处理

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

java 复制代码

@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

java 复制代码

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

java 复制代码

@@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();
    }
}

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

java 复制代码

    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

* 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();

}