/*
* 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.app;
import android.content.Context;
import android.content.Intent;
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.util.AndroidException;
/**
* A description of an Intent and target action to perform with it. Instances
* of this class are created with {@link #getActivity},
* {@link #getBroadcast}, {@link #getService}; 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 PendingIntent 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 PendingIntent:
* 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 PendingIntent 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
* PendingIntent itself will remain usable from other processes that
* have been given it. If the creating application later re-retrieves the
* same kind of PendingIntent (same operation, same Intent action, data,
* categories, and components, and same flags), it will receive a PendingIntent
* representing the same token if that is still valid, and can thus call
* {@link #cancel} to remove it.
*/
public final class PendingIntent implements Parcelable {
private final IIntentSender mTarget;
/**
* Flag for use with {@link #getActivity}, {@link #getBroadcast}, and
* {@link #getService}: this
* PendingIntent can only be used once. If set, after
* {@link #send()} is called on it, it will be automatically
* canceled for you and any future attempt to send through it will fail.
*/
public static final int FLAG_ONE_SHOT = 1<<30;
/**
* Flag for use with {@link #getActivity}, {@link #getBroadcast}, and
* {@link #getService}: if the described PendingIntent does not already
* exist, then simply return null instead of creating it.
*/
public static final int FLAG_NO_CREATE = 1<<29;
/**
* Flag for use with {@link #getActivity}, {@link #getBroadcast}, and
* {@link #getService}: if the described PendingIntent already exists,
* the current one is canceled before generating a new one. You can use
* this to retrieve a new PendingIntent when you are only changing the
* extra data in the Intent; by canceling the previous pending intent,
* this ensures that only entities given the new data will be able to
* launch it. If this assurance is not an issue, consider
* {@link #FLAG_UPDATE_CURRENT}.
*/
public static final int FLAG_CANCEL_CURRENT = 1<<28;
/**
* Flag for use with {@link #getActivity}, {@link #getBroadcast}, and
* {@link #getService}: if the described PendingIntent already exists,
* then keep it but its replace its extra data with what is in this new
* Intent. This can be used if you are creating intents where only the
* extras change, and don't care that any entities that received your
* previous PendingIntent will be able to launch it with your new
* extras even if they are not explicitly given to it.
*/
public static final int FLAG_UPDATE_CURRENT = 1<<27;
/**
* 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 CanceledException extends AndroidException {
public CanceledException() {
}
public CanceledException(String name) {
super(name);
}
public CanceledException(Exception cause) {
super(cause);
}
};
/**
* Callback interface for discovering when a send operation has
* completed. Primarily for use with a PendingIntent 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 pendingIntent The PendingIntent 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(PendingIntent pendingIntent, Intent intent,
int resultCode, String resultData, Bundle resultExtras);
}
private static class FinishedDispatcher extends IIntentReceiver.Stub
implements Runnable {
private final PendingIntent mPendingIntent;
private final OnFinished mWho;
private final Handler mHandler;
private Intent mIntent;
private int mResultCode;
private String mResultData;
private Bundle mResultExtras;
FinishedDispatcher(PendingIntent pi, OnFinished who, Handler handler) {
mPendingIntent = pi;
mWho = who;
mHandler = handler;
}
public void performReceive(Intent intent, int resultCode,
String data, Bundle extras, boolean serialized) {
mIntent = intent;
mResultCode = resultCode;
mResultData = data;
mResultExtras = extras;
if (mHandler == null) {
run();
} else {
mHandler.post(this);
}
}
public void run() {
mWho.onSendFinished(mPendingIntent, mIntent, mResultCode,
mResultData, mResultExtras);
}
}
/**
* Retrieve a PendingIntent that will start a new activity, like calling
* {@link Context#startActivity(Intent) Context.startActivity(Intent)}.
* Note that the activity will be started outside of the context of an
* existing activity, so you must use the {@link Intent#FLAG_ACTIVITY_NEW_TASK
* Intent.FLAG_ACTIVITY_NEW_TASK} launch flag in the Intent.
*
* @param context The Context in which this PendingIntent should start
* the activity.
* @param requestCode Private request code for the sender (currently
* not used).
* @param intent Intent of the activity to be launched.
* @param flags May be {@link #FLAG_ONE_SHOT}, {@link #FLAG_NO_CREATE},
* {@link #FLAG_CANCEL_CURRENT}, {@link #FLAG_UPDATE_CURRENT},
* or any of the flags as supported by
* {@link Intent#fillIn Intent.fillIn()} to control which unspecified parts
* of the intent that can be supplied when the actual send happens.
*
* @return Returns an existing or new PendingIntent matching the given
* parameters. May return null only if {@link #FLAG_NO_CREATE} has been
* supplied.
*/
public static PendingIntent getActivity(Context context, int requestCode,
Intent intent, int flags) {
String packageName = context.getPackageName();
String resolvedType = intent != null ? intent.resolveTypeIfNeeded(
context.getContentResolver()) : null;
try {
IIntentSender target =
ActivityManagerNative.getDefault().getIntentSender(
IActivityManager.INTENT_SENDER_ACTIVITY, packageName,
null, null, requestCode, intent, resolvedType, flags);
return target != null ? new PendingIntent(target) : null;
} catch (RemoteException e) {
}
return null;
}
/**
* Retrieve a PendingIntent that will perform a broadcast, like calling
* {@link Context#sendBroadcast(Intent) Context.sendBroadcast()}.
*
* @param context The Context in which this PendingIntent should perform
* the broadcast.
* @param requestCode Private request code for the sender (currently
* not used).
* @param intent The Intent to be broadcast.
* @param flags May be {@link #FLAG_ONE_SHOT}, {@link #FLAG_NO_CREATE},
* {@link #FLAG_CANCEL_CURRENT}, {@link #FLAG_UPDATE_CURRENT},
* or any of the flags as supported by
* {@link Intent#fillIn Intent.fillIn()} to control which unspecified parts
* of the intent that can be supplied when the actual send happens.
*
* @return Returns an existing or new PendingIntent matching the given
* parameters. May return null only if {@link #FLAG_NO_CREATE} has been
* supplied.
*/
public static PendingIntent getBroadcast(Context context, int requestCode,
Intent intent, int flags) {
String packageName = context.getPackageName();
String resolvedType = intent != null ? intent.resolveTypeIfNeeded(
context.getContentResolver()) : null;
try {
IIntentSender target =
ActivityManagerNative.getDefault().getIntentSender(
IActivityManager.INTENT_SENDER_BROADCAST, packageName,
null, null, requestCode, intent, resolvedType, flags);
return target != null ? new PendingIntent(target) : null;
} catch (RemoteException e) {
}
return null;
}
/**
* Retrieve a PendingIntent that will start a service, like calling
* {@link Context#startService Context.startService()}. The start
* arguments given to the service will come from the extras of the Intent.
*
* @param context The Context in which this PendingIntent should start
* the service.
* @param requestCode Private request code for the sender (currently
* not used).
* @param intent An Intent describing the service to be started.
* @param flags May be {@link #FLAG_ONE_SHOT}, {@link #FLAG_NO_CREATE},
* {@link #FLAG_CANCEL_CURRENT}, {@link #FLAG_UPDATE_CURRENT},
* or any of the flags as supported by
* {@link Intent#fillIn Intent.fillIn()} to control which unspecified parts
* of the intent that can be supplied when the actual send happens.
*
* @return Returns an existing or new PendingIntent matching the given
* parameters. May return null only if {@link #FLAG_NO_CREATE} has been
* supplied.
*/
public static PendingIntent getService(Context context, int requestCode,
Intent intent, int flags) {
String packageName = context.getPackageName();
String resolvedType = intent != null ? intent.resolveTypeIfNeeded(
context.getContentResolver()) : null;
try {
IIntentSender target =
ActivityManagerNative.getDefault().getIntentSender(
IActivityManager.INTENT_SENDER_SERVICE, packageName,
null, null, requestCode, intent, resolvedType, flags);
return target != null ? new PendingIntent(target) : null;
} catch (RemoteException e) {
}
return null;
}
/**
* Cancel a currently active PendingIntent. Only the original application
* owning an PendingIntent can cancel it.
*/
public void cancel() {
try {
ActivityManagerNative.getDefault().cancelIntentSender(mTarget);
} catch (RemoteException e) {
}
}
/**
* Perform the operation associated with this PendingIntent.
*
* @see #send(Context, int, Intent, android.app.PendingIntent.OnFinished, Handler)
*
* @throws CanceledException Throws CanceledException if the PendingIntent
* is no longer allowing more intents to be sent through it.
*/
public void send() throws CanceledException {
send(null, 0, null, null, null);
}
/**
* Perform the operation associated with this PendingIntent.
*
* @param code Result code to supply back to the PendingIntent's target.
*
* @see #send(Context, int, Intent, android.app.PendingIntent.OnFinished, Handler)
*
* @throws CanceledException Throws CanceledException if the PendingIntent
* is no longer allowing more intents to be sent through it.
*/
public void send(int code) throws CanceledException {
send(null, code, null, null, null);
}
/**
* Perform the operation associated with this PendingIntent, allowing the
* caller to specify information about the Intent to use.
*
* @param context The Context of the caller.
* @param code Result code to supply back to the PendingIntent's target.
* @param intent Additional Intent data. See {@link Intent#fillIn
* Intent.fillIn()} for information on how this is applied to the
* original Intent.
*
* @see #send(Context, int, Intent, android.app.PendingIntent.OnFinished, Handler)
*
* @throws CanceledException Throws CanceledException if the PendingIntent
* is no longer allowing more intents to be sent through it.
*/
public void send(Context context, int code, Intent intent)
throws CanceledException {
send(context, code, intent, null, null);
}
/**
* Perform the operation associated with this PendingIntent, allowing the
* caller to be notified when the send has completed.
*
* @param code Result code to supply back to the PendingIntent's target.
* @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.
*
* @see #send(Context, int, Intent, android.app.PendingIntent.OnFinished, Handler)
*
* @throws CanceledException Throws CanceledException if the PendingIntent
* is no longer allowing more intents to be sent through it.
*/
public void send(int code, OnFinished onFinished, Handler handler)
throws CanceledException {
send(null, code, null, onFinished, handler);
}
/**
* Perform the operation associated with this PendingIntent, allowing the
* caller to specify information about the Intent to use and be notified
* when the send has completed.
*
* <p>For the intent parameter, a PendingIntent
* often has restrictions on which fields can be supplied here, based on
* how the PendingIntent was retrieved in {@link #getActivity},
* {@link #getBroadcast}, or {@link #getService}.
*
* @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 PendingIntent'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.
*
* @see #send()
* @see #send(int)
* @see #send(Context, int, Intent)
* @see #send(int, android.app.PendingIntent.OnFinished, Handler)
*
* @throws CanceledException Throws CanceledException if the PendingIntent
* is no longer allowing more intents to be sent through it.
*/
public void send(Context context, int code, Intent intent,
OnFinished onFinished, Handler handler) throws CanceledException {
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);
if (res < 0) {
throw new CanceledException();
}
} catch (RemoteException e) {
throw new CanceledException(e);
}
}
/**
* Return the package name of the application that created this
* PendingIntent, 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 getTargetPackage() {
try {
return ActivityManagerNative.getDefault()
.getPackageForIntentSender(mTarget);
} catch (RemoteException e) {
// Should never happen.
return null;
}
}
/**
* Comparison operator on two PendingIntent objects, such that true
* is returned then they both represent the same operation from the
* same package. This allows you to use {@link #getActivity},
* {@link #getBroadcast}, or {@link #getService} multiple times (even
* across a process being killed), resulting in different PendingIntent
* objects but whose equals() method identifies them as being the same
* operation.
*/
@Override
public boolean equals(Object otherObj) {
if (otherObj instanceof PendingIntent) {
return mTarget.asBinder().equals(((PendingIntent)otherObj)
.mTarget.asBinder());
}
return false;
}
@Override
public int hashCode() {
return mTarget.asBinder().hashCode();
}
@Override
public String toString() {
return "PendingIntent{"
+ Integer.toHexString(System.identityHashCode(this))
+ " target " + (mTarget != null ? mTarget.asBinder() : null) + "}";
}
public int describeContents() {
return 0;
}
public void writeToParcel(Parcel out, int flags) {
out.writeStrongBinder(mTarget.asBinder());
}
public static final Parcelable.Creator<PendingIntent> CREATOR
= new Parcelable.Creator<PendingIntent>() {
public PendingIntent createFromParcel(Parcel in) {
IBinder target = in.readStrongBinder();
return target != null ? new PendingIntent(target) : null;
}
public PendingIntent[] newArray(int size) {
return new PendingIntent[size];
}
};
/**
* Convenience function for writing either a PendingIntent or null pointer to
* a Parcel. You must use this with {@link #readPendingIntentOrNullFromParcel}
* for later reading it.
*
* @param sender The PendingIntent to write, or null.
* @param out Where to write the PendingIntent.
*/
public static void writePendingIntentOrNullToParcel(PendingIntent 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 #writePendingIntentOrNullToParcel}.
*
* @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 PendingIntent readPendingIntentOrNullFromParcel(Parcel in) {
IBinder b = in.readStrongBinder();
return b != null ? new PendingIntent(b) : null;
}
/*package*/ PendingIntent(IIntentSender target) {
mTarget = target;
}
/*package*/ PendingIntent(IBinder target) {
mTarget = IIntentSender.Stub.asInterface(target);
}
/*package*/ IIntentSender getTarget() {
return mTarget;
}
}
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