| /* |
| * Copyright (C) 2007 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.widget; |
| |
| import static com.android.internal.util.Preconditions.checkNotNull; |
| import static com.android.internal.util.Preconditions.checkState; |
| |
| import android.annotation.IntDef; |
| import android.annotation.NonNull; |
| import android.annotation.Nullable; |
| import android.annotation.StringRes; |
| import android.app.INotificationManager; |
| import android.app.ITransientNotification; |
| import android.app.ITransientNotificationCallback; |
| import android.compat.Compatibility; |
| import android.compat.annotation.ChangeId; |
| import android.compat.annotation.EnabledAfter; |
| import android.compat.annotation.UnsupportedAppUsage; |
| import android.content.Context; |
| import android.content.res.Resources; |
| import android.graphics.drawable.Drawable; |
| import android.os.Binder; |
| import android.os.Build; |
| import android.os.Handler; |
| import android.os.IBinder; |
| import android.os.Looper; |
| import android.os.Message; |
| import android.os.RemoteException; |
| import android.os.ServiceManager; |
| import android.util.Log; |
| import android.view.View; |
| import android.view.WindowManager; |
| import android.view.accessibility.IAccessibilityManager; |
| |
| import com.android.internal.annotations.GuardedBy; |
| |
| import java.lang.annotation.Retention; |
| import java.lang.annotation.RetentionPolicy; |
| import java.lang.ref.WeakReference; |
| import java.util.ArrayList; |
| import java.util.List; |
| |
| /** |
| * A toast is a view containing a quick little message for the user. The toast class |
| * helps you create and show those. |
| * {@more} |
| * |
| * <p> |
| * When the view is shown to the user, appears as a floating view over the |
| * application. It will never receive focus. The user will probably be in the |
| * middle of typing something else. The idea is to be as unobtrusive as |
| * possible, while still showing the user the information you want them to see. |
| * Two examples are the volume control, and the brief message saying that your |
| * settings have been saved. |
| * <p> |
| * The easiest way to use this class is to call one of the static methods that constructs |
| * everything you need and returns a new Toast object. |
| * <p> |
| * Note that |
| * <a href="{@docRoot}reference/com/google/android/material/snackbar/Snackbar">Snackbars</a> are |
| * preferred for brief messages while the app is in the foreground. |
| * <p> |
| * Note that toasts being sent from the background are rate limited, so avoid sending such toasts |
| * in quick succession. |
| * <p> |
| * Starting with Android 12 (API level 31), apps targeting Android 12 or newer will have |
| * their toasts limited to two lines. |
| * |
| * <div class="special reference"> |
| * <h3>Developer Guides</h3> |
| * <p>For information about creating Toast notifications, read the |
| * <a href="{@docRoot}guide/topics/ui/notifiers/toasts.html">Toast Notifications</a> developer |
| * guide.</p> |
| * </div> |
| */ |
| public class Toast { |
| static final String TAG = "Toast"; |
| static final boolean localLOGV = false; |
| |
| /** @hide */ |
| @IntDef(prefix = { "LENGTH_" }, value = { |
| LENGTH_SHORT, |
| LENGTH_LONG |
| }) |
| @Retention(RetentionPolicy.SOURCE) |
| public @interface Duration {} |
| |
| /** |
| * Show the view or text notification for a short period of time. This time |
| * could be user-definable. This is the default. |
| * @see #setDuration |
| */ |
| public static final int LENGTH_SHORT = 0; |
| |
| /** |
| * Show the view or text notification for a long period of time. This time |
| * could be user-definable. |
| * @see #setDuration |
| */ |
| public static final int LENGTH_LONG = 1; |
| |
| /** |
| * Text toasts will be rendered by SystemUI instead of in-app, so apps can't circumvent |
| * background custom toast restrictions. |
| */ |
| @ChangeId |
| @EnabledAfter(targetSdkVersion = Build.VERSION_CODES.Q) |
| private static final long CHANGE_TEXT_TOASTS_IN_THE_SYSTEM = 147798919L; |
| |
| |
| private final Binder mToken; |
| private final Context mContext; |
| private final Handler mHandler; |
| @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.P) |
| final TN mTN; |
| @UnsupportedAppUsage |
| int mDuration; |
| |
| /** |
| * This is also passed to {@link TN} object, where it's also accessed with itself as its own |
| * lock. |
| */ |
| @GuardedBy("mCallbacks") |
| private final List<Callback> mCallbacks; |
| |
| /** |
| * View to be displayed, in case this is a custom toast (e.g. not created with {@link |
| * #makeText(Context, int, int)} or its variants). |
| */ |
| @Nullable |
| private View mNextView; |
| |
| /** |
| * Text to be shown, in case this is NOT a custom toast (e.g. created with {@link |
| * #makeText(Context, int, int)} or its variants). |
| */ |
| @Nullable |
| private CharSequence mText; |
| |
| /** |
| * Construct an empty Toast object. You must call {@link #setView} before you |
| * can call {@link #show}. |
| * |
| * @param context The context to use. Usually your {@link android.app.Activity} object. |
| */ |
| public Toast(Context context) { |
| this(context, null); |
| } |
| |
| /** |
| * Constructs an empty Toast object. If looper is null, Looper.myLooper() is used. |
| * @hide |
| */ |
| public Toast(@NonNull Context context, @Nullable Looper looper) { |
| mContext = context; |
| mToken = new Binder(); |
| looper = getLooper(looper); |
| mHandler = new Handler(looper); |
| mCallbacks = new ArrayList<>(); |
| mTN = new TN(context, context.getPackageName(), mToken, |
| mCallbacks, looper); |
| mTN.mY = context.getResources().getDimensionPixelSize( |
| com.android.internal.R.dimen.toast_y_offset); |
| mTN.mGravity = context.getResources().getInteger( |
| com.android.internal.R.integer.config_toastDefaultGravity); |
| } |
| |
| private Looper getLooper(@Nullable Looper looper) { |
| if (looper != null) { |
| return looper; |
| } |
| return checkNotNull(Looper.myLooper(), |
| "Can't toast on a thread that has not called Looper.prepare()"); |
| } |
| |
| /** |
| * Show the view for the specified duration. |
| * |
| * <p>Note that toasts being sent from the background are rate limited, so avoid sending such |
| * toasts in quick succession. |
| */ |
| public void show() { |
| if (Compatibility.isChangeEnabled(CHANGE_TEXT_TOASTS_IN_THE_SYSTEM)) { |
| checkState(mNextView != null || mText != null, "You must either set a text or a view"); |
| } else { |
| if (mNextView == null) { |
| throw new RuntimeException("setView must have been called"); |
| } |
| } |
| |
| INotificationManager service = getService(); |
| String pkg = mContext.getOpPackageName(); |
| TN tn = mTN; |
| tn.mNextView = new WeakReference<>(mNextView); |
| final boolean isUiContext = mContext.isUiContext(); |
| final int displayId = mContext.getDisplayId(); |
| |
| try { |
| if (Compatibility.isChangeEnabled(CHANGE_TEXT_TOASTS_IN_THE_SYSTEM)) { |
| if (mNextView != null) { |
| // It's a custom toast |
| service.enqueueToast(pkg, mToken, tn, mDuration, isUiContext, displayId); |
| } else { |
| // It's a text toast |
| ITransientNotificationCallback callback = |
| new CallbackBinder(mCallbacks, mHandler); |
| service.enqueueTextToast(pkg, mToken, mText, mDuration, isUiContext, displayId, |
| callback); |
| } |
| } else { |
| service.enqueueToast(pkg, mToken, tn, mDuration, isUiContext, displayId); |
| } |
| } catch (RemoteException e) { |
| // Empty |
| } |
| } |
| |
| /** |
| * Close the view if it's showing, or don't show it if it isn't showing yet. |
| * You do not normally have to call this. Normally view will disappear on its own |
| * after the appropriate duration. |
| */ |
| public void cancel() { |
| if (Compatibility.isChangeEnabled(CHANGE_TEXT_TOASTS_IN_THE_SYSTEM) |
| && mNextView == null) { |
| try { |
| getService().cancelToast(mContext.getOpPackageName(), mToken); |
| } catch (RemoteException e) { |
| // Empty |
| } |
| } else { |
| mTN.cancel(); |
| } |
| } |
| |
| /** |
| * Set the view to show. |
| * |
| * @see #getView |
| * @deprecated Custom toast views are deprecated. Apps can create a standard text toast with the |
| * {@link #makeText(Context, CharSequence, int)} method, or use a |
| * <a href="{@docRoot}reference/com/google/android/material/snackbar/Snackbar">Snackbar</a> |
| * when in the foreground. Starting from Android {@link Build.VERSION_CODES#R}, apps |
| * targeting API level {@link Build.VERSION_CODES#R} or higher that are in the background |
| * will not have custom toast views displayed. |
| */ |
| @Deprecated |
| public void setView(View view) { |
| mNextView = view; |
| } |
| |
| /** |
| * Return the view. |
| * |
| * <p>Toasts constructed with {@link #Toast(Context)} that haven't called {@link #setView(View)} |
| * with a non-{@code null} view will return {@code null} here. |
| * |
| * <p>Starting from Android {@link Build.VERSION_CODES#R}, in apps targeting API level {@link |
| * Build.VERSION_CODES#R} or higher, toasts constructed with {@link #makeText(Context, |
| * CharSequence, int)} or its variants will also return {@code null} here unless they had called |
| * {@link #setView(View)} with a non-{@code null} view. If you want to be notified when the |
| * toast is shown or hidden, use {@link #addCallback(Callback)}. |
| * |
| * @see #setView |
| * @deprecated Custom toast views are deprecated. Apps can create a standard text toast with the |
| * {@link #makeText(Context, CharSequence, int)} method, or use a |
| * <a href="{@docRoot}reference/com/google/android/material/snackbar/Snackbar">Snackbar</a> |
| * when in the foreground. Starting from Android {@link Build.VERSION_CODES#R}, apps |
| * targeting API level {@link Build.VERSION_CODES#R} or higher that are in the background |
| * will not have custom toast views displayed. |
| */ |
| @Deprecated |
| @Nullable public View getView() { |
| return mNextView; |
| } |
| |
| /** |
| * Set how long to show the view for. |
| * @see #LENGTH_SHORT |
| * @see #LENGTH_LONG |
| */ |
| public void setDuration(@Duration int duration) { |
| mDuration = duration; |
| mTN.mDuration = duration; |
| } |
| |
| /** |
| * Return the duration. |
| * @see #setDuration |
| */ |
| @Duration |
| public int getDuration() { |
| return mDuration; |
| } |
| |
| /** |
| * Set the margins of the view. |
| * |
| * <p><strong>Warning:</strong> Starting from Android {@link Build.VERSION_CODES#R}, for apps |
| * targeting API level {@link Build.VERSION_CODES#R} or higher, this method is a no-op when |
| * called on text toasts. |
| * |
| * @param horizontalMargin The horizontal margin, in percentage of the |
| * container width, between the container's edges and the |
| * notification |
| * @param verticalMargin The vertical margin, in percentage of the |
| * container height, between the container's edges and the |
| * notification |
| */ |
| public void setMargin(float horizontalMargin, float verticalMargin) { |
| if (isSystemRenderedTextToast()) { |
| Log.e(TAG, "setMargin() shouldn't be called on text toasts, the values won't be used"); |
| } |
| mTN.mHorizontalMargin = horizontalMargin; |
| mTN.mVerticalMargin = verticalMargin; |
| } |
| |
| /** |
| * Return the horizontal margin. |
| * |
| * <p><strong>Warning:</strong> Starting from Android {@link Build.VERSION_CODES#R}, for apps |
| * targeting API level {@link Build.VERSION_CODES#R} or higher, this method shouldn't be called |
| * on text toasts as its return value may not reflect actual value since text toasts are not |
| * rendered by the app anymore. |
| */ |
| public float getHorizontalMargin() { |
| if (isSystemRenderedTextToast()) { |
| Log.e(TAG, "getHorizontalMargin() shouldn't be called on text toasts, the result may " |
| + "not reflect actual values."); |
| } |
| return mTN.mHorizontalMargin; |
| } |
| |
| /** |
| * Return the vertical margin. |
| * |
| * <p><strong>Warning:</strong> Starting from Android {@link Build.VERSION_CODES#R}, for apps |
| * targeting API level {@link Build.VERSION_CODES#R} or higher, this method shouldn't be called |
| * on text toasts as its return value may not reflect actual value since text toasts are not |
| * rendered by the app anymore. |
| */ |
| public float getVerticalMargin() { |
| if (isSystemRenderedTextToast()) { |
| Log.e(TAG, "getVerticalMargin() shouldn't be called on text toasts, the result may not" |
| + " reflect actual values."); |
| } |
| return mTN.mVerticalMargin; |
| } |
| |
| /** |
| * Set the location at which the notification should appear on the screen. |
| * |
| * <p><strong>Warning:</strong> Starting from Android {@link Build.VERSION_CODES#R}, for apps |
| * targeting API level {@link Build.VERSION_CODES#R} or higher, this method is a no-op when |
| * called on text toasts. |
| * |
| * @see android.view.Gravity |
| * @see #getGravity |
| */ |
| public void setGravity(int gravity, int xOffset, int yOffset) { |
| if (isSystemRenderedTextToast()) { |
| Log.e(TAG, "setGravity() shouldn't be called on text toasts, the values won't be used"); |
| } |
| mTN.mGravity = gravity; |
| mTN.mX = xOffset; |
| mTN.mY = yOffset; |
| } |
| |
| /** |
| * Get the location at which the notification should appear on the screen. |
| * |
| * <p><strong>Warning:</strong> Starting from Android {@link Build.VERSION_CODES#R}, for apps |
| * targeting API level {@link Build.VERSION_CODES#R} or higher, this method shouldn't be called |
| * on text toasts as its return value may not reflect actual value since text toasts are not |
| * rendered by the app anymore. |
| * |
| * @see android.view.Gravity |
| * @see #getGravity |
| */ |
| public int getGravity() { |
| if (isSystemRenderedTextToast()) { |
| Log.e(TAG, "getGravity() shouldn't be called on text toasts, the result may not reflect" |
| + " actual values."); |
| } |
| return mTN.mGravity; |
| } |
| |
| /** |
| * Return the X offset in pixels to apply to the gravity's location. |
| * |
| * <p><strong>Warning:</strong> Starting from Android {@link Build.VERSION_CODES#R}, for apps |
| * targeting API level {@link Build.VERSION_CODES#R} or higher, this method shouldn't be called |
| * on text toasts as its return value may not reflect actual value since text toasts are not |
| * rendered by the app anymore. |
| */ |
| public int getXOffset() { |
| if (isSystemRenderedTextToast()) { |
| Log.e(TAG, "getXOffset() shouldn't be called on text toasts, the result may not reflect" |
| + " actual values."); |
| } |
| return mTN.mX; |
| } |
| |
| /** |
| * Return the Y offset in pixels to apply to the gravity's location. |
| * |
| * <p><strong>Warning:</strong> Starting from Android {@link Build.VERSION_CODES#R}, for apps |
| * targeting API level {@link Build.VERSION_CODES#R} or higher, this method shouldn't be called |
| * on text toasts as its return value may not reflect actual value since text toasts are not |
| * rendered by the app anymore. |
| */ |
| public int getYOffset() { |
| if (isSystemRenderedTextToast()) { |
| Log.e(TAG, "getYOffset() shouldn't be called on text toasts, the result may not reflect" |
| + " actual values."); |
| } |
| return mTN.mY; |
| } |
| |
| private boolean isSystemRenderedTextToast() { |
| return Compatibility.isChangeEnabled(CHANGE_TEXT_TOASTS_IN_THE_SYSTEM) && mNextView == null; |
| } |
| |
| /** |
| * Adds a callback to be notified when the toast is shown or hidden. |
| * |
| * Note that if the toast is blocked for some reason you won't get a call back. |
| * |
| * @see #removeCallback(Callback) |
| */ |
| public void addCallback(@NonNull Callback callback) { |
| checkNotNull(callback); |
| synchronized (mCallbacks) { |
| mCallbacks.add(callback); |
| } |
| } |
| |
| /** |
| * Removes a callback previously added with {@link #addCallback(Callback)}. |
| */ |
| public void removeCallback(@NonNull Callback callback) { |
| synchronized (mCallbacks) { |
| mCallbacks.remove(callback); |
| } |
| } |
| |
| /** |
| * Gets the LayoutParams for the Toast window. |
| * @hide |
| */ |
| @UnsupportedAppUsage |
| @Nullable public WindowManager.LayoutParams getWindowParams() { |
| if (Compatibility.isChangeEnabled(CHANGE_TEXT_TOASTS_IN_THE_SYSTEM)) { |
| if (mNextView != null) { |
| // Custom toasts |
| return mTN.mParams; |
| } else { |
| // Text toasts |
| return null; |
| } |
| } else { |
| // Text and custom toasts are app-rendered |
| return mTN.mParams; |
| } |
| } |
| |
| /** |
| * Make a standard toast that just contains text. |
| * |
| * @param context The context to use. Usually your {@link android.app.Activity} object. |
| * @param text The text to show. Can be formatted text. |
| * @param duration How long to display the message. Either {@link #LENGTH_SHORT} or |
| * {@link #LENGTH_LONG} |
| * |
| */ |
| public static Toast makeText(Context context, CharSequence text, @Duration int duration) { |
| return makeText(context, null, text, duration); |
| } |
| |
| /** |
| * Make a standard toast to display using the specified looper. |
| * If looper is null, Looper.myLooper() is used. |
| * |
| * @hide |
| */ |
| public static Toast makeText(@NonNull Context context, @Nullable Looper looper, |
| @NonNull CharSequence text, @Duration int duration) { |
| Toast result = new Toast(context, looper); |
| |
| if (Compatibility.isChangeEnabled(CHANGE_TEXT_TOASTS_IN_THE_SYSTEM)) { |
| result.mText = text; |
| } else { |
| result.mNextView = ToastPresenter.getTextToastView(context, text); |
| } |
| |
| result.mDuration = duration; |
| return result; |
| } |
| |
| /** |
| * Make a standard toast with an icon to display using the specified looper. |
| * If looper is null, Looper.myLooper() is used. |
| * |
| * The toast will be a custom view that's rendered by the app (instead of by SystemUI). |
| * In Android version R and above, non-system apps can only render the toast |
| * when it's in the foreground. |
| * |
| * @hide |
| */ |
| public static Toast makeCustomToastWithIcon(@NonNull Context context, @Nullable Looper looper, |
| @NonNull CharSequence text, @Duration int duration, @NonNull Drawable icon) { |
| if (icon == null) { |
| throw new IllegalArgumentException("Drawable icon should not be null " |
| + "for makeCustomToastWithIcon"); |
| } |
| |
| Toast result = new Toast(context, looper); |
| result.mNextView = ToastPresenter.getTextToastViewWithIcon(context, text, icon); |
| result.mDuration = duration; |
| return result; |
| } |
| |
| /** |
| * Make a standard toast that just contains text from a resource. |
| * |
| * @param context The context to use. Usually your {@link android.app.Activity} object. |
| * @param resId The resource id of the string resource to use. Can be formatted text. |
| * @param duration How long to display the message. Either {@link #LENGTH_SHORT} or |
| * {@link #LENGTH_LONG} |
| * |
| * @throws Resources.NotFoundException if the resource can't be found. |
| */ |
| public static Toast makeText(Context context, @StringRes int resId, @Duration int duration) |
| throws Resources.NotFoundException { |
| return makeText(context, context.getResources().getText(resId), duration); |
| } |
| |
| /** |
| * Update the text in a Toast that was previously created using one of the makeText() methods. |
| * @param resId The new text for the Toast. |
| */ |
| public void setText(@StringRes int resId) { |
| setText(mContext.getText(resId)); |
| } |
| |
| /** |
| * Update the text in a Toast that was previously created using one of the makeText() methods. |
| * @param s The new text for the Toast. |
| */ |
| public void setText(CharSequence s) { |
| if (Compatibility.isChangeEnabled(CHANGE_TEXT_TOASTS_IN_THE_SYSTEM)) { |
| if (mNextView != null) { |
| throw new IllegalStateException( |
| "Text provided for custom toast, remove previous setView() calls if you " |
| + "want a text toast instead."); |
| } |
| mText = s; |
| } else { |
| if (mNextView == null) { |
| throw new RuntimeException("This Toast was not created with Toast.makeText()"); |
| } |
| TextView tv = mNextView.findViewById(com.android.internal.R.id.message); |
| if (tv == null) { |
| throw new RuntimeException("This Toast was not created with Toast.makeText()"); |
| } |
| tv.setText(s); |
| } |
| } |
| |
| // ======================================================================================= |
| // All the gunk below is the interaction with the Notification Service, which handles |
| // the proper ordering of these system-wide. |
| // ======================================================================================= |
| |
| @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.P) |
| private static INotificationManager sService; |
| |
| @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.P) |
| static private INotificationManager getService() { |
| if (sService != null) { |
| return sService; |
| } |
| sService = INotificationManager.Stub.asInterface( |
| ServiceManager.getService(Context.NOTIFICATION_SERVICE)); |
| return sService; |
| } |
| |
| private static class TN extends ITransientNotification.Stub { |
| @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.P) |
| private final WindowManager.LayoutParams mParams; |
| |
| private static final int SHOW = 0; |
| private static final int HIDE = 1; |
| private static final int CANCEL = 2; |
| final Handler mHandler; |
| |
| @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.P) |
| int mGravity; |
| int mX; |
| @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.P) |
| int mY; |
| float mHorizontalMargin; |
| float mVerticalMargin; |
| |
| |
| @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.P) |
| View mView; |
| @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.P) |
| WeakReference<View> mNextView; |
| int mDuration; |
| |
| WindowManager mWM; |
| |
| final String mPackageName; |
| final Binder mToken; |
| private final ToastPresenter mPresenter; |
| |
| @GuardedBy("mCallbacks") |
| private final WeakReference<List<Callback>> mCallbacks; |
| |
| /** |
| * Creates a {@link ITransientNotification} object. |
| * |
| * The parameter {@code callbacks} is not copied and is accessed with itself as its own |
| * lock. |
| */ |
| TN(Context context, String packageName, Binder token, List<Callback> callbacks, |
| @Nullable Looper looper) { |
| IAccessibilityManager accessibilityManager = IAccessibilityManager.Stub.asInterface( |
| ServiceManager.getService(Context.ACCESSIBILITY_SERVICE)); |
| mPresenter = new ToastPresenter(context, accessibilityManager, getService(), |
| packageName); |
| mParams = mPresenter.getLayoutParams(); |
| mPackageName = packageName; |
| mToken = token; |
| mCallbacks = new WeakReference<>(callbacks); |
| |
| mHandler = new Handler(looper, null) { |
| @Override |
| public void handleMessage(Message msg) { |
| switch (msg.what) { |
| case SHOW: { |
| IBinder token = (IBinder) msg.obj; |
| handleShow(token); |
| break; |
| } |
| case HIDE: { |
| handleHide(); |
| // Don't do this in handleHide() because it is also invoked by |
| // handleShow() |
| mNextView = null; |
| break; |
| } |
| case CANCEL: { |
| handleHide(); |
| // Don't do this in handleHide() because it is also invoked by |
| // handleShow() |
| mNextView = null; |
| try { |
| getService().cancelToast(mPackageName, mToken); |
| } catch (RemoteException e) { |
| } |
| break; |
| } |
| } |
| } |
| }; |
| } |
| |
| private List<Callback> getCallbacks() { |
| synchronized (mCallbacks) { |
| if (mCallbacks.get() != null) { |
| return new ArrayList<>(mCallbacks.get()); |
| } else { |
| return new ArrayList<>(); |
| } |
| } |
| } |
| |
| /** |
| * schedule handleShow into the right thread |
| */ |
| @Override |
| @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.P, trackingBug = 115609023) |
| public void show(IBinder windowToken) { |
| if (localLOGV) Log.v(TAG, "SHOW: " + this); |
| mHandler.obtainMessage(SHOW, windowToken).sendToTarget(); |
| } |
| |
| /** |
| * schedule handleHide into the right thread |
| */ |
| @Override |
| public void hide() { |
| if (localLOGV) Log.v(TAG, "HIDE: " + this); |
| mHandler.obtainMessage(HIDE).sendToTarget(); |
| } |
| |
| public void cancel() { |
| if (localLOGV) Log.v(TAG, "CANCEL: " + this); |
| mHandler.obtainMessage(CANCEL).sendToTarget(); |
| } |
| |
| public void handleShow(IBinder windowToken) { |
| if (localLOGV) Log.v(TAG, "HANDLE SHOW: " + this + " mView=" + mView |
| + " mNextView=" + mNextView); |
| // If a cancel/hide is pending - no need to show - at this point |
| // the window token is already invalid and no need to do any work. |
| if (mHandler.hasMessages(CANCEL) || mHandler.hasMessages(HIDE)) { |
| return; |
| } |
| if (mNextView != null && mView != mNextView.get()) { |
| // remove the old view if necessary |
| handleHide(); |
| mView = mNextView.get(); |
| if (mView != null) { |
| mPresenter.show(mView, mToken, windowToken, mDuration, mGravity, mX, mY, |
| mHorizontalMargin, mVerticalMargin, |
| new CallbackBinder(getCallbacks(), mHandler)); |
| } |
| } |
| } |
| |
| @UnsupportedAppUsage |
| public void handleHide() { |
| if (localLOGV) Log.v(TAG, "HANDLE HIDE: " + this + " mView=" + mView); |
| if (mView != null) { |
| checkState(mView == mPresenter.getView(), |
| "Trying to hide toast view different than the last one displayed"); |
| mPresenter.hide(new CallbackBinder(getCallbacks(), mHandler)); |
| mView = null; |
| } |
| } |
| } |
| |
| /** |
| * Callback object to be called when the toast is shown or hidden. |
| * |
| * @see #makeText(Context, CharSequence, int) |
| * @see #addCallback(Callback) |
| */ |
| public abstract static class Callback { |
| /** |
| * Called when the toast is displayed on the screen. |
| */ |
| public void onToastShown() {} |
| |
| /** |
| * Called when the toast is hidden. |
| */ |
| public void onToastHidden() {} |
| } |
| |
| private static class CallbackBinder extends ITransientNotificationCallback.Stub { |
| private final Handler mHandler; |
| |
| @GuardedBy("mCallbacks") |
| private final List<Callback> mCallbacks; |
| |
| /** |
| * Creates a {@link ITransientNotificationCallback} object. |
| * |
| * The parameter {@code callbacks} is not copied and is accessed with itself as its own |
| * lock. |
| */ |
| private CallbackBinder(List<Callback> callbacks, Handler handler) { |
| mCallbacks = callbacks; |
| mHandler = handler; |
| } |
| |
| @Override |
| public void onToastShown() { |
| mHandler.post(() -> { |
| for (Callback callback : getCallbacks()) { |
| callback.onToastShown(); |
| } |
| }); |
| } |
| |
| @Override |
| public void onToastHidden() { |
| mHandler.post(() -> { |
| for (Callback callback : getCallbacks()) { |
| callback.onToastHidden(); |
| } |
| }); |
| } |
| |
| private List<Callback> getCallbacks() { |
| synchronized (mCallbacks) { |
| return new ArrayList<>(mCallbacks); |
| } |
| } |
| } |
| } |
