Add MediaProjection APIs.

The new MediaProjection infrastructure allows the system to hand out
tokens granting the ability to capture the screen's contents, audio,
etc. at a granular level. It's intended to be used both for screen
casting, via the cast APIs, as well as screen sharing via third party
applications.

The screen sharing case is implemented, but all of audio capturing
is still forthcoming.

Change-Id: I4b24669bed7083e11413c10ed8d6b025f5375316

1 files changed, 138 insertions, 0 deletions

diff --git a/packages/SystemUI/src/com/android/systemui/media/MediaProjectionPermissionActivity.java b/packages/SystemUI/src/com/android/systemui/media/MediaProjectionPermissionActivity.java
new file mode 100644
index 0000000..b441eaa
--- /dev/null
+++ b/packages/SystemUI/src/com/android/systemui/media/MediaProjectionPermissionActivity.java
@@ -0,0 +1,138 @@
+/*
+ * 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 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.media.projection.MediaProjectionManager;
+import android.media.projection.IMediaProjectionManager;
+import android.media.projection.IMediaProjection;
+import android.os.Bundle;
+import android.os.IBinder;
+import android.os.RemoteException;
+import android.os.ServiceManager;
+import android.util.Log;
+import android.view.LayoutInflater;
+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 MediaProjectionPermissionActivity extends AlertActivity
+        implements DialogInterface.OnClickListener, CheckBox.OnCheckedChangeListener {
+    private static final String TAG = "MediaProjectionPermissionActivity";
+
+    private boolean mPermanentGrant;
+    private String mPackageName;
+    private int mUid;
+    private IMediaProjectionManager mService;
+
+    @Override
+    public void onCreate(Bundle icicle) {
+        super.onCreate(icicle);
+
+        Intent intent = getIntent();
+        mPackageName = getCallingPackage();
+        IBinder b = ServiceManager.getService(MEDIA_PROJECTION_SERVICE);
+        mService = IMediaProjectionManager.Stub.asInterface(b);
+
+        if (mPackageName == null) {
+            finish();
+            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();
+            return;
+        }
+
+        try {
+            if (mService.hasProjectionPermission(mUid, mPackageName)) {
+                setResult(RESULT_OK, getMediaProjectionIntent(mUid, mPackageName,
+                        false /*permanentGrant*/));
+                finish();
+                return;
+            }
+        } catch (RemoteException e) {
+            Log.e(TAG, "Error checking projection permissions", e);
+            finish();
+            return;
+        }
+
+        String appName = aInfo.loadLabel(packageManager).toString();
+
+        final AlertController.AlertParams ap = mAlertParams;
+        ap.mIcon = aInfo.loadIcon(packageManager);
+        ap.mMessage = getString(R.string.media_projection_dialog_text, appName);
+        ap.mPositiveButtonText = getString(R.string.media_projection_action_text);
+        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(R.layout.remember_permission_checkbox, null);
+        CheckBox rememberPermissionCheckbox =
+                (CheckBox)ap.mView.findViewById(R.id.remember);
+        rememberPermissionCheckbox.setOnCheckedChangeListener(this);
+
+        setupAlert();
+    }
+
+    @Override
+    public void onClick(DialogInterface dialog, int which) {
+        try {
+            if (which == AlertDialog.BUTTON_POSITIVE) {
+                setResult(RESULT_OK, getMediaProjectionIntent(
+                        mUid, mPackageName, mPermanentGrant));
+            }
+        } catch (RemoteException e) {
+            Log.e(TAG, "Error granting projection permission", e);
+            setResult(RESULT_CANCELED);
+        } finally {
+            finish();
+        }
+    }
+
+    @Override
+    public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
+        mPermanentGrant = isChecked;
+    }
+
+    private Intent getMediaProjectionIntent(int uid, String packageName, boolean permanentGrant)
+            throws RemoteException {
+        IMediaProjection projection = mService.createProjection(uid, packageName,
+                 MediaProjectionManager.TYPE_SCREEN_CAPTURE, permanentGrant);
+        Intent intent = new Intent();
+        intent.putExtra(MediaProjectionManager.EXTRA_MEDIA_PROJECTION, projection.asBinder());
+        return intent;
+    }
+}