Java Code Examples for android.app.Activity#isDestroyed()

public void show(@NonNull Scene hostScene) {
    if (hostScene.getLifecycle().getCurrentState() == Lifecycle.State.DESTROYED) {
        return;
    }
    Activity activity = hostScene.getActivity();
    if (activity == null) {
        return;
    }

    if (activity.isFinishing()) {
        return;
    }

    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR1 && activity.isDestroyed()) {
        return;
    }

    NavigationScene navigationScene = hostScene.getNavigationScene();
    if (navigationScene == null) {
        return;
    }

    navigationScene.push(this, new PushOptions.Builder().setAnimation(new DialogSceneAnimatorExecutor()).setTranslucent(true).build());
}
 

@TargetApi(Build.VERSION_CODES.JELLY_BEAN)
static void requestAvatar(@Nullable Fragment fragment) {
    if (fragment == null) {
        return;
    }

    final Activity activity = fragment.getActivity();
    if (activity == null || activity.isFinishing() || activity.isDestroyed()) {
        return;
    }

    if (!isPermissionGranted(activity, android.Manifest.permission.READ_EXTERNAL_STORAGE)) {
        fragment.requestPermissions(new String[]{android.Manifest.permission.READ_EXTERNAL_STORAGE},
                READ_EXTERNAL_STORAGE_PERMISSION);
    } else {
        Intent intent = new Intent();
        intent.setType("image/*");
        intent.setAction(Intent.ACTION_GET_CONTENT);

        fragment.startActivityForResult(Intent.createChooser(intent, fragment.getString(R.string.select_image)),
                ACTIVITY_RESULT_SELECT_PICTURE);
    }
}
 

Activity getTopActivity() {
    if (!mActivityList.isEmpty()) {
        for (int i = mActivityList.size() - 1; i >= 0; i--) {
            Activity activity = mActivityList.get(i);
            if (activity == null
                    || activity.isFinishing()
                    || (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR1 && activity.isDestroyed())) {
                continue;
            }
            return activity;
        }
    }
    Activity topActivityByReflect = getTopActivityByReflect();
    if (topActivityByReflect != null) {
        setTopActivity(topActivityByReflect);
    }
    return topActivityByReflect;
}
 

public void show() {
    Activity activity = mActivityRef.get();
    if (activity == null) {
        if (mSirenListener != null) {
            mSirenListener.onError(new NullPointerException("activity reference is null"));
        }
    } else if (Build.VERSION.SDK_INT >= 17 && !activity.isDestroyed() || Build.VERSION.SDK_INT < 17 && !activity.isFinishing()) {

        AlertDialog alertDialog = initDialog(activity);
        setupDialog(alertDialog);

        if (mSirenListener != null) {
            mSirenListener.onShowUpdateDialog();
        }
    }
}
 

public void secureSettings(Activity activity, final Context appContext, Exception e, String page) { //exception function for a Secure Settings problem
    Log.e(page, e.getMessage()); //log the error
    e.printStackTrace();

    if (!activity.isDestroyed()) {
        new AlertDialog.Builder(activity) //show a dialog with the error and prompt user to set up permissions again
                .setIcon(alertRed)
                .setTitle(Html.fromHtml("<font color='#ff0000'>" + activity.getResources().getText(R.string.error) + "</font>"))
                .setMessage(activity.getResources().getText(R.string.perms_not_set) + "\n\n\"" + e.getMessage() + "\"\n\n" + activity.getResources().getText(R.string.prompt_setup))
                .setPositiveButton(activity.getResources().getText(R.string.yes), new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialog, int which) {
                        Intent intent = new Intent(appContext, SetupActivity.class);
                        intent.addFlags(intent.FLAG_ACTIVITY_NEW_TASK);
                        appContext.startActivity(intent);
                    }
                })
                .setNegativeButton(activity.getResources().getText(R.string.no), null)
                .show();
    }
}
 

@Override
public void onPostExecute(Boolean result) {
    // Re-acquire a strong reference to the weakReference, and verify
    // that it still exists and is active.
    Activity activity = this.weakReference.get();
    if (activity == null || activity.isFinishing()
            || (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR1 && activity.isDestroyed())) {
        return;
    }
    Context context = activity.getApplicationContext();
    if (result) {
        final Handler handler = new Handler();
        handler.postDelayed(new Runnable() {
            @Override
            public void run() {
                Toast.makeText(context, "Download Completed: " + name, Toast.LENGTH_LONG).show();
            }
        }, LOAD_DELAY);
    } else {
        Toast.makeText(context, "failed to read data", Toast.LENGTH_SHORT).show();
    }
}
 

@Override
public void onPostExecute(Boolean result) {
    // Re-acquire a strong reference to the weakReference, and verify
    // that it still exists and is active.
    Activity activity = this.weakReference.get();
    if (activity == null || activity.isFinishing()
            || (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR1 && activity.isDestroyed())) {
        return;
    }
    Context context = activity.getApplicationContext();
    if (result) {
        final Handler handler = new Handler();
        handler.postDelayed(new Runnable() {
            @Override
            public void run() {
                Toast.makeText(context, "Download Completed: " + name, Toast.LENGTH_LONG).show();
            }
        }, LOAD_DELAY);
    } else {
        Toast.makeText(context, "failed to read data", Toast.LENGTH_SHORT).show();
    }
}
 

private void onJsAlertInternal(WebView view, String message) {
    Activity mActivity = this.mActivity;
    if (mActivity == null || mActivity.isFinishing()) {
        return;
    }
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR1) {
        if (mActivity.isDestroyed()) {
            return;
        }
    }
    try {
        AgentWebUtils.show(view,
                message,
                Snackbar.LENGTH_SHORT,
                Color.WHITE,
                mActivity.getResources().getColor(R.color.black),
                null,
                -1,
                null);
    } catch (Throwable throwable) {
        if (LogUtils.isDebug()){
            throwable.printStackTrace();
        }
    }
}
 

@Override
protected void onProgressUpdate(PLVideoFrame... values) {
    super.onProgressUpdate(values);

    Activity activity = weakActivity.get();
    if (activity == null || activity.isFinishing() || activity.isDestroyed()) {
        return;
    }

    PLVideoFrame frame = values[0];
    if (mOnLoadFrameListener != null) {
        mOnLoadFrameListener.onFrameReady(frame == null ? null : frame.toBitmap());
    }
}
 

static public boolean isAlive(Context context) {
    if (!(context instanceof Activity)) {
        return false;
    }
    Activity activity = (Activity) context;
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR1) {
        return !activity.isDestroyed();
    } else {
        return !activity.isFinishing();
    }
}
 

static void setupToolbar(final Activity activity, final VxCard pub,
                         final String topicName, final boolean online, final Date lastSeen) {
    if (activity == null || activity.isDestroyed() || activity.isFinishing()) {
        return;
    }

    final Toolbar toolbar = activity.findViewById(R.id.toolbar);
    if (toolbar == null) {
        return;
    }

    activity.runOnUiThread(new Runnable() {
        @Override
        public void run() {
            if (!TextUtils.isEmpty(topicName)) {
                final String title = pub != null && pub.fn != null ?
                        pub.fn : activity.getString(R.string.placeholder_contact_title);
                toolbar.setTitle(title);
                if (lastSeen != null && !online) {
                    toolbar.setSubtitle(relativeDateFormat(activity, lastSeen));
                } else {
                    toolbar.setSubtitle(null);
                }
                constructToolbarLogo(activity, pub != null ? pub.getBitmap() : null,
                        pub != null ? pub.fn  : null, topicName, online);
            } else {
                toolbar.setTitle(R.string.app_name);
                toolbar.setSubtitle(null);
                toolbar.setLogo(null);
            }
        }
    });
}
 

public void systemSettings(Activity activity, final Context appContext, Exception e, String page) { //exceptions for System Settings (should only be needed on API > 22)
    Log.e(page, e.getMessage()); //log error
    e.printStackTrace();

    if (!activity.isDestroyed()) {
        new AlertDialog.Builder(activity) //show details dialog
                .setIcon(alertRed)
                .setTitle(Html.fromHtml("<font color='#ff0000'>" + activity.getResources().getText(R.string.error) + "</font>"))
                .setMessage(activity.getResources().getText(R.string.system_settings_failed) + "\n\n\"" + e.getMessage() + "\"")
                .setPositiveButton(activity.getResources().getText(R.string.ok), null)
                .show();
    }
}
 

public <T extends Activity> boolean hasActivity(Class<T> tClass) {
    for (Activity activity : mActivities) {
        if (tClass.getName().equals(activity.getClass().getName())) {
            return !activity.isDestroyed() || !activity.isFinishing();
        }
    }
    return false;
}
 

public static boolean canLoadImage(Activity activity) {
    if (activity == null) {
        return true;
    }

    boolean destroyed = Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR1 &&
            activity.isDestroyed();

    if (destroyed || activity.isFinishing()) {
        return false;
    }

    return true;
}
 

/**
 * Decodes and scales a contact's image from a file pointed to by a Uri in the contact's data,
 * and returns the result as a Bitmap. The column that contains the Uri varies according to the
 * platform version.
 *
 * @param photoData For platforms prior to Android 3.0, provide the Contact._ID column value.
 *                  For Android 3.0 and later, provide the Contact.PHOTO_THUMBNAIL_URI value.
 * @param imageSize The desired target width and height of the output image in pixels.
 * @return A Bitmap containing the contact's image, resized to fit the provided image size. If
 * no thumbnail exists, returns null.
 */
private static Bitmap loadContactPhotoThumbnail(Fragment fragment, String photoData, int imageSize) {

    // Ensures the Fragment is still added to an activity. As this method is called in a
    // background thread, there's the possibility the Fragment is no longer attached and
    // added to an activity. If so, no need to spend resources loading the contact photo.
    if (!fragment.isAdded()) {
        return null;
    }

    Activity activity = fragment.getActivity();
    if (activity == null || activity.isFinishing() || activity.isDestroyed()) {
        return null;
    }

    // Instantiates an AssetFileDescriptor. Given a content Uri pointing to an image file, the
    // ContentResolver can return an AssetFileDescriptor for the file.

    // This "try" block catches an Exception if the file descriptor returned from the Contacts
    // Provider doesn't point to an existing file.
    Uri thumbUri = Uri.parse(photoData);
    try (AssetFileDescriptor afd = activity.getContentResolver().openAssetFileDescriptor(thumbUri, "r")) {

        // Retrieves a file descriptor from the Contacts Provider. To learn more about this
        // feature, read the reference documentation for
        // ContentResolver#openAssetFileDescriptor.

        // Gets a FileDescriptor from the AssetFileDescriptor. A BitmapFactory object can
        // decode the contents of a file pointed to by a FileDescriptor into a Bitmap.
        if (afd != null) {
            // Decodes a Bitmap from the image pointed to by the FileDescriptor, and scales it
            // to the specified width and height
            return ImageLoader.decodeSampledBitmapFromStream(
                    new BufferedInputStream(new FileInputStream(afd.getFileDescriptor())), imageSize, imageSize);
        }
    } catch (IOException e) {
        // If the file pointed to by the thumbnail URI doesn't exist, or the file can't be
        // opened in "read" mode, ContentResolver.openAssetFileDescriptor throws a
        // FileNotFoundException.
        if (BuildConfig.DEBUG) {
            Log.d(TAG, "Contact photo thumbnail not found for contact " + photoData
                    + ": " + e.toString());
        }
    }
    // If an AssetFileDescriptor was returned, try to close it
    // Closing a file descriptor might cause an IOException if the file is
    // already closed. Nothing extra is needed to handle this.

    // If the decoding failed, returns null
    return null;
}
 

/**
 * 检查activity是否存活
 */
public static boolean isAlive(Activity act) {
    if (act == null) return false;
    return !act.isFinishing() && !act.isDestroyed();
}
 

@TargetApi(Build.VERSION_CODES.JELLY_BEAN_MR1)
public static void load(Activity activity, String url, ImageView iv) {    //使用Glide加载ImageView(如头像)时，不要使用占位图
    if (!activity.isDestroyed()) {
        Glide.with(activity).load(url).crossFade().diskCacheStrategy(DiskCacheStrategy.SOURCE).into(iv);
    }
}
 

private void openImageSelector(@Nullable Activity activity) {
    if (activity == null || activity.isFinishing() || activity.isDestroyed()) {
        return;
    }

    if (!UiUtils.isPermissionGranted(activity, Manifest.permission.CAMERA)) {
        requestPermissions(new String[]{Manifest.permission.CAMERA, Manifest.permission.READ_EXTERNAL_STORAGE},
                ATTACH_IMAGE_PERMISSIONS);
        return;
    }

    // Pick image from gallery.
    Intent galleryIntent = new Intent(Intent.ACTION_PICK, MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
    galleryIntent.putExtra(Intent.EXTRA_MIME_TYPES, new String[]{"image/jpeg", "image/png"});

    Intent cameraIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
    // Make sure camera is available.
    if (cameraIntent.resolveActivity(activity.getPackageManager()) != null) {
        // Create temp file for storing the photo.
        File photoFile = null;
        try {
            photoFile = createImageFile(activity);
        } catch (IOException ex) {
            // Error occurred while creating the File
            Log.w(TAG, "Unable to create temp file for storing camera photo", ex);
        }
        // Continue only if the File was successfully created
        if (photoFile != null) {
            Uri photoUri = FileProvider.getUriForFile(activity,
                    "co.tinode.tindroid.provider", photoFile);

            cameraIntent.putExtra(MediaStore.EXTRA_OUTPUT, photoUri);
            // See explanation here: http://medium.com/@quiro91/ceb9bb0eec3a
            if (Build.VERSION.SDK_INT <= Build.VERSION_CODES.LOLLIPOP) {
                cameraIntent.setClipData(ClipData.newRawUri("", photoUri));
                cameraIntent.addFlags(Intent.FLAG_GRANT_WRITE_URI_PERMISSION|Intent.FLAG_GRANT_READ_URI_PERMISSION);
            }

            mCurrentPhotoFile = photoFile.getAbsolutePath();
            mCurrentPhotoUri = photoUri;

        } else {
            cameraIntent = null;
        }
    } else {
        cameraIntent = null;
    }

    // Pack two intents into a chooser.
    Intent chooserIntent = Intent.createChooser(galleryIntent, getString(R.string.select_image));
    if (cameraIntent != null) {
        chooserIntent.putExtra(Intent.EXTRA_INITIAL_INTENTS, new Parcelable[]{cameraIntent});
    }

    startActivityForResult(chooserIntent, ACTION_ATTACH_IMAGE);
}
 

public void needCalendar(@NonNull final Activity act, boolean force) {
    if (act.isDestroyed())
        return;

    if (!pCalendar && (!"-1".equals(Preferences.CALENDAR_INTEGRATION.get()) || force)) {

        AlertDialog.Builder builder = new AlertDialog.Builder(act);

        builder.setTitle(R.string.permissionCalendarTitle).setMessage(R.string.permissionCalendarText)
                .setPositiveButton(R.string.ok, (dialogInterface, i) -> ActivityCompat.requestPermissions(act, new String[]{Manifest.permission.READ_CALENDAR, Manifest.permission.WRITE_CALENDAR}, 0));


        builder.show();
    }

}
 

private void notifyContentChanged() {

        final Activity activity = getActivity();
        if (activity == null || activity.isFinishing() || activity.isDestroyed()) {
            return;
        }

        final AppCompatImageView avatar = activity.findViewById(R.id.imageAvatar);
        final TextView title = activity.findViewById(R.id.topicTitle);
        final TextView subtitle = activity.findViewById(R.id.topicSubtitle);

        VxCard pub = mTopic.getPub();
        if (pub != null && !TextUtils.isEmpty(pub.fn)) {
            title.setText(pub.fn);
            title.setTypeface(null, Typeface.NORMAL);
            title.setTextIsSelectable(true);
        } else {
            title.setText(R.string.placeholder_contact_title);
            title.setTypeface(null, Typeface.ITALIC);
            title.setTextIsSelectable(false);
        }

        final Bitmap bmp = pub != null ? pub.getBitmap() : null;
        if (bmp != null) {
            avatar.setImageDrawable(new RoundImageDrawable(getResources(), bmp));
        } else {
            avatar.setImageDrawable(
                    new LetterTileDrawable(requireContext())
                            .setIsCircular(true)
                            .setContactTypeAndColor(
                                    mTopic.getTopicType() == Topic.TopicType.P2P ?
                                            LetterTileDrawable.ContactType.PERSON :
                                            LetterTileDrawable.ContactType.GROUP)
                            .setLetterAndColor(pub != null ? pub.fn : null, mTopic.getName()));
        }

        PrivateType priv = mTopic.getPriv();
        if (priv != null && !TextUtils.isEmpty(priv.getComment())) {
            subtitle.setText(priv.getComment());
            subtitle.setTypeface(null, Typeface.NORMAL);
            TypedValue typedValue = new TypedValue();
            Resources.Theme theme = getActivity().getTheme();
            theme.resolveAttribute(android.R.attr.textColorSecondary, typedValue, true);
            TypedArray arr = activity.obtainStyledAttributes(typedValue.data,
                    new int[]{android.R.attr.textColorSecondary});
            subtitle.setTextColor(arr.getColor(0, -1));
            arr.recycle();
            subtitle.setTextIsSelectable(true);
        } else {
            subtitle.setText(R.string.placeholder_private);
            subtitle.setTypeface(null, Typeface.ITALIC);
            subtitle.setTextColor(getResources().getColor(R.color.colorTextPlaceholder));
            subtitle.setTextIsSelectable(false);
        }

        ((Switch) activity.findViewById(R.id.switchMuted)).setChecked(mTopic.isMuted());
        ((Switch) activity.findViewById(R.id.switchArchived)).setChecked(mTopic.isArchived());

        Acs acs = mTopic.getAccessMode();
        ((TextView) activity.findViewById(R.id.permissionsSingle)).setText(acs == null ? "" : acs.getMode());
    }