/*
* Copyright (C) 2006 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 android.content;
import android.app.ActivityManagerNative;
import android.content.Context;
import android.content.Intent;
import android.content.IIntentSender;
import android.content.IIntentReceiver;
import android.os.Bundle;
import android.os.RemoteException;
import android.os.Handler;
import android.os.IBinder;
import android.os.Parcel;
import android.os.Parcelable;
import android.os.UserHandle;
import android.util.AndroidException;
/**
* A description of an Intent and target action to perform with it.
* The returned object can be
* handed to other applications so that they can perform the action you
* described on your behalf at a later time.
*
* <p>By giving a IntentSender to another application,
* you are granting it the right to perform the operation you have specified
* as if the other application was yourself (with the same permissions and
* identity). As such, you should be careful about how you build the IntentSender:
* often, for example, the base Intent you supply will have the component
* name explicitly set to one of your own components, to ensure it is ultimately
* sent there and nowhere else.
*
* <p>A IntentSender itself is simply a reference to a token maintained by
* the system describing the original data used to retrieve it. This means
* that, even if its owning application's process is killed, the
* IntentSender itself will remain usable from other processes that
* have been given it. If the creating application later re-retrieves the
* same kind of IntentSender (same operation, same Intent action, data,
* categories, and components, and same flags), it will receive a IntentSender
* representing the same token if that is still valid.
*
* <p>Instances of this class can not be made directly, but rather must be
* created from an existing {@link android.app.PendingIntent} with
* {@link android.app.PendingIntent#getIntentSender() PendingIntent.getIntentSender()}.
*/
public class IntentSender implements Parcelable {
private final IIntentSender mTarget;
/**
* Exception thrown when trying to send through a PendingIntent that
* has been canceled or is otherwise no longer able to execute the request.
*/
public static class SendIntentException extends AndroidException {
public SendIntentException() {
}
public SendIntentException(String name) {
super(name);
}
public SendIntentException(Exception cause) {
super(cause);
}
}
/**
* Callback interface for discovering when a send operation has
* completed. Primarily for use with a IntentSender that is
* performing a broadcast, this provides the same information as
* calling {@link Context#sendOrderedBroadcast(Intent, String,
* android.content.BroadcastReceiver, Handler, int, String, Bundle)
* Context.sendBroadcast()} with a final BroadcastReceiver.
*/
public interface OnFinished {
/**
* Called when a send operation as completed.
*
* @param IntentSender The IntentSender this operation was sent through.
* @param intent The original Intent that was sent.
* @param resultCode The final result code determined by the send.
* @param resultData The final data collected by a broadcast.
* @param resultExtras The final extras collected by a broadcast.
*/
void onSendFinished(IntentSender IntentSender, Intent intent,
int resultCode, String resultData, Bundle resultExtras);
}
private static class FinishedDispatcher extends IIntentReceiver.Stub
implements Runnable {
private final IntentSender mIntentSender;
private final OnFinished mWho;
private final Handler mHandler;
private Intent mIntent;
private int mResultCode;
private String mResultData;
private Bundle mResultExtras;
FinishedDispatcher(IntentSender pi, OnFinished who, Handler handler) {
mIntentSender = pi;
mWho = who;
mHandler = handler;
}
public void performReceive(Intent intent, int resultCode, String data,
Bundle extras, boolean serialized, boolean sticky, int sendingUser) {
mIntent = intent;
mResultCode = resultCode;
mResultData = data;
mResultExtras = extras;
if (mHandler == null) {
run();
} else {
mHandler.post(this);
}
}
public void run() {
mWho.onSendFinished(mIntentSender, mIntent, mResultCode,
mResultData, mResultExtras);
}
}
/**
* Perform the operation associated with this IntentSender, allowing the
* caller to specify information about the Intent to use and be notified
* when the send has completed.
*
* @param context The Context of the caller. This may be null if
* <var>intent</var> is also null.
* @param code Result code to supply back to the IntentSender's target.
* @param intent Additional Intent data. See {@link Intent#fillIn
* Intent.fillIn()} for information on how this is applied to the
* original Intent. Use null to not modify the original Intent.
* @param onFinished The object to call back on when the send has
* completed, or null for no callback.
* @param handler Handler identifying the thread on which the callback
* should happen. If null, the callback will happen from the thread
* pool of the process.
*
*
* @throws SendIntentException Throws CanceledIntentException if the IntentSender
* is no longer allowing more intents to be sent through it.
*/
public void sendIntent(Context context, int code, Intent intent,
OnFinished onFinished, Handler handler) throws SendIntentException {
sendIntent(context, code, intent, onFinished, handler, null);
}
/**
* Perform the operation associated with this IntentSender, allowing the
* caller to specify information about the Intent to use and be notified
* when the send has completed.
*
* @param context The Context of the caller. This may be null if
* <var>intent</var> is also null.
* @param code Result code to supply back to the IntentSender's target.
* @param intent Additional Intent data. See {@link Intent#fillIn
* Intent.fillIn()} for information on how this is applied to the
* original Intent. Use null to not modify the original Intent.
* @param onFinished The object to call back on when the send has
* completed, or null for no callback.
* @param handler Handler identifying the thread on which the callback
* should happen. If null, the callback will happen from the thread
* pool of the process.
* @param requiredPermission Name of permission that a recipient of the PendingIntent
* is required to hold. This is only valid for broadcast intents, and
* corresponds to the permission argument in
* {@link Context#sendBroadcast(Intent, String) Context.sendOrderedBroadcast(Intent, String)}.
* If null, no permission is required.
*
*
* @throws SendIntentException Throws CanceledIntentException if the IntentSender
* is no longer allowing more intents to be sent through it.
*/
public void sendIntent(Context context, int code, Intent intent,
OnFinished onFinished, Handler handler, String requiredPermission)
throws SendIntentException {
try {
String resolvedType = intent != null ?
intent.resolveTypeIfNeeded(context.getContentResolver())
: null;
int res = mTarget.send(code, intent, resolvedType,
onFinished != null
? new FinishedDispatcher(this, onFinished, handler)
: null,
requiredPermission);
if (res < 0) {
throw new SendIntentException();
}
} catch (RemoteException e) {
throw new SendIntentException();
}
}
/**
* @deprecated Renamed to {@link #getCreatorPackage()}.
*/
@Deprecated
public String getTargetPackage() {
try {
return ActivityManagerNative.getDefault()
.getPackageForIntentSender(mTarget);
} catch (RemoteException e) {
// Should never happen.
return null;
}
}
/**
* Return the package name of the application that created this
* IntentSender, that is the identity under which you will actually be
* sending the Intent. The returned string is supplied by the system, so
* that an application can not spoof its package.
*
* @return The package name of the PendingIntent, or null if there is
* none associated with it.
*/
public String getCreatorPackage() {
try {
return ActivityManagerNative.getDefault()
.getPackageForIntentSender(mTarget);
} catch (RemoteException e) {
// Should never happen.
return null;
}
}
/**
* Return the uid of the application that created this
* PendingIntent, that is the identity under which you will actually be
* sending the Intent. The returned integer is supplied by the system, so
* that an application can not spoof its uid.
*
* @return The uid of the PendingIntent, or -1 if there is
* none associated with it.
*/
public int getCreatorUid() {
try {
return ActivityManagerNative.getDefault()
.getUidForIntentSender(mTarget);
} catch (RemoteException e) {
// Should never happen.
return -1;
}
}
/**
* Return the user handle of the application that created this
* PendingIntent, that is the user under which you will actually be
* sending the Intent. The returned UserHandle is supplied by the system, so
* that an application can not spoof its user. See
* {@link android.os.Process#myUserHandle() Process.myUserHandle()} for
* more explanation of user handles.
*
* @return The user handle of the PendingIntent, or null if there is
* none associated with it.
*/
public UserHandle getCreatorUserHandle() {
try {
int uid = ActivityManagerNative.getDefault()
.getUidForIntentSender(mTarget);
return uid > 0 ? new UserHandle(UserHandle.getUserId(uid)) : null;
} catch (RemoteException e) {
// Should never happen.
return null;
}
}
/**
* Comparison operator on two IntentSender objects, such that true
* is returned then they both represent the same operation from the
* same package.
*/
@Override
public boolean equals(Object otherObj) {
if (otherObj instanceof IntentSender) {
return mTarget.asBinder().equals(((IntentSender)otherObj)
.mTarget.asBinder());
}
return false;
}
@Override
public int hashCode() {
return mTarget.asBinder().hashCode();
}
@Override
public String toString() {
StringBuilder sb = new StringBuilder(128);
sb.append("IntentSender{");
sb.append(Integer.toHexString(System.identityHashCode(this)));
sb.append(": ");
sb.append(mTarget != null ? mTarget.asBinder() : null);
sb.append('}');
return sb.toString();
}
public int describeContents() {
return 0;
}
public void writeToParcel(Parcel out, int flags) {
out.writeStrongBinder(mTarget.asBinder());
}
public static final Parcelable.Creator<IntentSender> CREATOR
= new Parcelable.Creator<IntentSender>() {
public IntentSender createFromParcel(Parcel in) {
IBinder target = in.readStrongBinder();
return target != null ? new IntentSender(target) : null;
}
public IntentSender[] newArray(int size) {
return new IntentSender[size];
}
};
/**
* Convenience function for writing either a IntentSender or null pointer to
* a Parcel. You must use this with {@link #readIntentSenderOrNullFromParcel}
* for later reading it.
*
* @param sender The IntentSender to write, or null.
* @param out Where to write the IntentSender.
*/
public static void writeIntentSenderOrNullToParcel(IntentSender sender,
Parcel out) {
out.writeStrongBinder(sender != null ? sender.mTarget.asBinder()
: null);
}
/**
* Convenience function for reading either a Messenger or null pointer from
* a Parcel. You must have previously written the Messenger with
* {@link #writeIntentSenderOrNullToParcel}.
*
* @param in The Parcel containing the written Messenger.
*
* @return Returns the Messenger read from the Parcel, or null if null had
* been written.
*/
public static IntentSender readIntentSenderOrNullFromParcel(Parcel in) {
IBinder b = in.readStrongBinder();
return b != null ? new IntentSender(b) : null;
}
/** @hide */
public IIntentSender getTarget() {
return mTarget;
}
/** @hide */
public IntentSender(IIntentSender target) {
mTarget = target;
}
/** @hide */
public IntentSender(IBinder target) {
mTarget = IIntentSender.Stub.asInterface(target);
}
}
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